Free AI agent tools API

Connect through MCP

Use the endpoint https://apitoolcalls.com/mcp in a client that supports remote MCP over Streamable HTTP:

{
  "mcpServers": {
    "apitoolcalls": {
      "url": "https://apitoolcalls.com/mcp"
    }
  }
}

curl -fsSL https://apitoolcalls.com/apitc -o ~/.local/bin/apitc && chmod +x ~/.local/bin/apitc

apitc search "qr code"
apitc call make_qr --arg text=https://example.com -o qr.json

Plain /mcp lists search_tools, get_tool_schema and call_tool. search_tools also finds browser-only tools with their page links. For the full callable list, send tools/list to /mcp?tools=all. The examples below are direct JSON-RPC tool calls sent by POST to the MCP endpoint; existing tool names remain callable.

Agent tools are free: 20 calls a day per IP, no key needed.

Free calls also share a global cap of 2000 calls a day across all users. Per-tool caps across all users: get_transcript: 500 calls a day; page_to_markdown: 1000 calls a day. Resets at midnight UTC.

Read the plain-text agent catalog (llms.txt), the machine-readable catalog (tools.json), or the OpenAPI 3.1 description (openapi.json).

HTTP GET routes accept query parameters; POST routes accept a JSON body. For GET /api/data-finder, use q for the use_case argument. Other argument names match the tables below.

apa_citation_generator

Format an APA reference and in-text citations from entered source metadata.

Use apa_citation_generator on the web

Call this tool through MCP.

{"id":1,"jsonrpc":"2.0","method":"tools/call","params":{"arguments":{"authors":[{"family":"Smith","given":"Jane"}],"date":"2020","publisher":"Example Press","title":"The Example Book","type":"book"},"name":"apa_citation_generator"}}

average_calculator

Compute mean, median, modes, range, sum, count, population and sample standard deviation, plus an optional separately weighted average.

Use average_calculator on the web

Call this tool through MCP.

{"id":1,"jsonrpc":"2.0","method":"tools/call","params":{"arguments":{"values":[2,4,4,6],"weights":[1,1,1,3]},"name":"average_calculator"}}

base_convert

Converts a bounded integer string between bases 2 through 36 using exact BigInt arithmetic. Inputs contain 1–4096 digits and must be valid in the source base. Optional bitWidth (1–4096) validates a bit pattern; signed=true requires a width and reads the source value as two’s complement. Unsigned is the default.

Use base_convert on the web

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{"id":1,"jsonrpc":"2.0","method":"tools/call","params":{"arguments":{"fromBase":10,"toBase":16,"value":"255"},"name":"base_convert"}}

basement_water_cause

Narrow down why a basement gets wet and who fixes it. Eight observation groups return every rule-matched possible cause, evidence, safe first checks, trade referrals and sources. Hazard stops come first; no probabilities or structural diagnosis. Pure rules, no network or model.

Use basement_water_cause on the web

HTTP: GET /api/basement-water.

{"id":1,"jsonrpc":"2.0","method":"tools/call","params":{"arguments":{"gutters":["downspout_near"],"timing":["rain"],"where":["wall_floor_joint"]},"name":"basement_water_cause"}}

bmi_calculator

Calculate adult BMI and its band from weight, height and units.

Use bmi_calculator on the web

Call this tool through MCP.

{"id":1,"jsonrpc":"2.0","method":"tools/call","params":{"arguments":{"height":1.75,"weight":70},"name":"bmi_calculator"}}

board_feet

Sum board-foot lumber volumes from entered dimensions and whole piece counts, with per-row optional prices and a priced subtotal.

Use board_feet on the web

Call this tool through MCP.

{"id":1,"jsonrpc":"2.0","method":"tools/call","params":{"arguments":{"rows":[{"length":8,"pricePerBoardFoot":4,"quantity":3,"thickness":1,"width":6}]},"name":"board_feet"}}

body_fat_calculator

Calculate Navy body fat percentage from sex and tape measurements.

Use body_fat_calculator on the web

Call this tool through MCP.

{"id":1,"jsonrpc":"2.0","method":"tools/call","params":{"arguments":{"abdomen":34,"height":70,"neck":15,"sex":"male"},"name":"body_fat_calculator"}}

calendar_age_difference

Calculate years, months, days and total days between two birth dates. Use explicit Gregorian dates and a stated month-end convention.

Use calendar_age_difference on the web

Call this tool through MCP.

{"id":1,"jsonrpc":"2.0","method":"tools/call","params":{"arguments":{"date1":"2023-01-31","date2":"2023-02-28"},"name":"calendar_age_difference"}}

calorie_calculator

Calculate resting energy and daily calories from adult measurements, formula and activity level.

Use calorie_calculator on the web

Call this tool through MCP.

{"id":1,"jsonrpc":"2.0","method":"tools/call","params":{"arguments":{"age":30,"height":180,"sex":"male","weight":80},"name":"calorie_calculator"}}

character_count

Count Unicode characters, words, lines and UTF-8 bytes from text.

Use character_count on the web

Call this tool through MCP.

{"id":1,"jsonrpc":"2.0","method":"tools/call","params":{"arguments":{"text":"Hello world.\nHi!"},"name":"character_count"}}

combinations

Compute exact combinations nCr or permutations nPr for bounded integer inputs.

Use combinations on the web

Call this tool through MCP.

{"id":1,"jsonrpc":"2.0","method":"tools/call","params":{"arguments":{"mode":"combinations","n":5,"r":2},"name":"combinations"}}

company_facts

Read a business's own home, about and contact pages and return its name, address, phone, email, founding year and what it does, each with the page it came from. Page text goes to a language model: with no key, a small shared free daily allowance (Google Gemini); with an X-OpenRouter-Key header, the caller's OpenRouter key.

Use company_facts on the web

HTTP: POST /api/company-facts.

Needs the caller's OpenRouter key in the X-OpenRouter-Key header.

{"id":1,"jsonrpc":"2.0","method":"tools/call","params":{"arguments":{"url":"https://example.com/"},"name":"company_facts"}}

compound_interest_calculator

Calculate compound or simple interest, balance, total contributed, interest earned, modeled APY and yearly balances from principal, nominal rate, term and deposit timing.

Use compound_interest_calculator on the web

Call this tool through MCP.

{"id":1,"jsonrpc":"2.0","method":"tools/call","params":{"arguments":{"annualRate":10,"compoundingPerYear":1,"contribution":100,"contributionFrequency":"yearly","contributionTiming":"end","principal":1000,"years":2},"name":"compound_interest_calculator"}}

concrete_calculator

Computes slab, footing, cylindrical-column or solid-step concrete volume, waste allowance and whole 40/60/80 lb bag counts from QUIKRETE No. 1101 yields.

Use concrete_calculator on the web

Call this tool through MCP.

{"id":1,"jsonrpc":"2.0","method":"tools/call","params":{"arguments":{"diameter":12,"height":48,"shape":"column","unit":"in","waste":10},"name":"concrete_calculator"}}

date_calculator

Count signed calendar days or weekdays between dates, or add and subtract calendar units with month-end clamping.

Use date_calculator on the web

Call this tool through MCP.

{"id":1,"jsonrpc":"2.0","method":"tools/call","params":{"arguments":{"amount":1,"date":"2024-01-31","mode":"shift","unit":"months"},"name":"date_calculator"}}

debt_to_income

Arithmetic on entered numbers only: sum up to 100 entered monthly debt payments and divide by positive gross monthly income. Shows the sum and ratio percentage, rounded half up to two decimal places, with no comparison bands or classification.

Use debt_to_income on the web

Call this tool through MCP.

{"id":1,"jsonrpc":"2.0","method":"tools/call","params":{"arguments":{"grossMonthlyIncome":5000,"monthlyDebts":[1000,250,150]},"name":"debt_to_income"}}

decimal_to_fraction

Converts a terminating or explicitly repeating decimal to an exact simplified fraction, mixed number and decimal display.

Use decimal_to_fraction on the web

Call this tool through MCP.

{"id":1,"jsonrpc":"2.0","method":"tools/call","params":{"arguments":{"decimal":"0.1(6)"},"name":"decimal_to_fraction"}}

discount_calculator

Calculate a discounted price, ordered stacked percentage discounts, savings, effective discount and total with an entered sales tax percentage after discounts.

Use discount_calculator on the web

Call this tool through MCP.

{"id":1,"jsonrpc":"2.0","method":"tools/call","params":{"arguments":{"discounts":[20,10],"price":100,"salesTaxPercent":5},"name":"discount_calculator"}}

driveway_cost

Estimate driveway replacement costs for a given size. Returns national installed ranges with no published typical figure. One call compares all ten surfaces. Base, drainage and permits are not priced; removal is priced only for an existing concrete driveway. Includes unpriced checks, two separate national reference cards and dated sources. Pure arithmetic, no network or model.

Use driveway_cost on the web

HTTP: GET /api/driveway-cost.

{"id":1,"jsonrpc":"2.0","method":"tools/call","params":{"arguments":{"sections":[{"length_ft":12,"width_ft":24}],"surface":"concrete_standard"},"name":"driveway_cost"}}

epoch_convert

Convert between Unix timestamps and dates. Converts a Unix timestamp (seconds or milliseconds, detected by size) or an ISO 8601 date string to epoch seconds, epoch milliseconds, an ISO UTC time, the same moment in an optional IANA time zone, and the weekday there. A date string with no offset is read in the given zone, UTC by default. Pure standard-library rules, no network, model or clock.

Use epoch_convert on the web

HTTP: GET /api/epoch-convert.

{"id":1,"jsonrpc":"2.0","method":"tools/call","params":{"arguments":{"tz":"America/New_York","value":1710000000},"name":"epoch_convert"}}

ev_charger_install_cost

Work out the circuit a home EV charger needs, panel triage, utility install cost references and federal credit rules. Returns safety first, the exact 125% minimum breaker calculation, panel triage, unpriced extras and dated federal 30C rules. Reference cards are utility and DOE program figures, not a price for this home. A licensed electrician and permit are needed; confirm local requirements and inspection. Pure rules and Decimal, no network, model or clock. Web and MCP share the free daily allowance.

Use ev_charger_install_cost on the web

HTTP: GET /api/ev-charger-installation-cost.

{"id":1,"jsonrpc":"2.0","method":"tools/call","params":{"arguments":{"charger_amps":48,"level":"level2"},"name":"ev_charger_install_cost"}}

extract_strings

List the readable text inside any file, given as base64, at most 2,000,000 bytes: runs of ASCII and UTF-16LE characters (UTF-8 on request) at least min_length long, with byte offsets. Labels each string by shape as a URL, email, IP address, file path, key or token, or other, and counts every kind across the whole file; the list can be narrowed by kind or text and holds up to 2,000 strings in file order. Pure standard library, no network or model.

Use extract_strings on the web

Call this tool through MCP.

{"id":1,"jsonrpc":"2.0","method":"tools/call","params":{"arguments":{"file":"AAFIZWxsbyBodHRwczovL2V4YW1wbGUuY29tL2RvY3MAAm9wc0BleGFtcGxlLm9yZwA="},"name":"extract_strings"}}

fence_cost

Estimate fence and gate costs from net non-gate length and gate widths. Returns calculated low, median bid and high bounds from exact City of Sunrise FL 2020 municipal bid rows, their scope and sources, and local permit guidance. Historical public bid observations are not current homeowner prices.

Use fence_cost on the web

HTTP: GET /api/fence-cost.

{"id":1,"jsonrpc":"2.0","method":"tools/call","params":{"arguments":{"fence_type":"wood_6","gate_type":"wood_6","gate_widths_ft":[4],"net_length_ft":100},"name":"fence_cost"}}

find_data

Get a full Data Finder plan for up to three sources: fit, cost at your monthly volume, resale terms with recorded clause, URL and read date, and build-it-yourself guidance. No live source lookup. Defaults: volume 0, US, no resale.

Use find_data on the web

HTTP: GET /api/data-finder.

{"id":1,"jsonrpc":"2.0","method":"tools/call","params":{"arguments":{"use_case":"Example use case"},"name":"find_data"}}

flooring_cost

Estimate installed flooring costs for given room sizes. Returns national installed ranges (labor and materials), no labor-only figure, and no published typical figure. One call compares all eight materials using net room area, with hardwood order guidance, an unpriced prep checklist, a separate historical Census reference card and dated sources. Pure arithmetic, no network or model.

Use flooring_cost on the web

HTTP: GET /api/flooring-cost.

{"id":1,"jsonrpc":"2.0","method":"tools/call","params":{"arguments":{"material":"carpet","rooms":[{"length_ft":12,"width_ft":15}]},"name":"flooring_cost"}}

font_generator

Convert text to a selected Unicode letter style.

Use font_generator on the web

Call this tool through MCP.

{"id":1,"jsonrpc":"2.0","method":"tools/call","params":{"arguments":{"style":"bold","text":"Hello 123!"},"name":"font_generator"}}

fraction_calculator

Computes exact addition, subtraction, multiplication or division of fractions and mixed numbers, with simplified, mixed and decimal forms.

Use fraction_calculator on the web

Call this tool through MCP.

{"id":1,"jsonrpc":"2.0","method":"tools/call","params":{"arguments":{"a":"1 1/2","b":"2/3","operation":"+"},"name":"fraction_calculator"}}

fuel_cost

Calculate trip fuel quantity and cost from entered distance, fuel economy, fuel price and currency; supports US mpg, L/100 km and km/L.

Use fuel_cost on the web

Call this tool through MCP.

{"id":1,"jsonrpc":"2.0","method":"tools/call","params":{"arguments":{"currency":"USD","distance":300,"economy":30,"price":4,"units":"us_mpg"},"name":"fuel_cost"}}

funeral_cost

Show funeral consumer rights, national burial and cremation reference costs, and add up a funeral home's itemized prices. Returns FTC Funeral Rule rights first. Reference figures are NFDA 2023 national medians from an industry member survey, not local prices. Bundle cards apply only to services with viewing; direct services have no citable national bundle figure. The worksheet adds up the family's own itemized prices and keeps missing prices visible. Pure rules and Decimal money, no network or model. Web and MCP share the free daily allowance.

Use funeral_cost on the web

HTTP: GET /api/funeral-cost.

{"id":1,"jsonrpc":"2.0","method":"tools/call","params":{"arguments":{"disposition":"cremation","prices":{"basic_services":1200,"crematory_fee":350},"service":"direct"},"name":"funeral_cost"}}

furnace_age

Estimate furnace manufacture age from a confirmed Lennox legacy, Rheem or Nordyne serial format or a maker-confirmed date. Calculates age at your selected as-of date, keeps NAHB and InterNACHI life guidance separate, applies EPA age guidance and the DOE repair comparison to your own quotes, and returns separately labeled historical and modeled replacement references.

Use furnace_age on the web

HTTP: GET /api/furnace_age.

{"id":1,"jsonrpc":"2.0","method":"tools/call","params":{"arguments":{"as_of":"2026-10-04","brand":"Lennox","century":1900,"format_confirmed":true,"serial":"5178M 99989"},"name":"furnace_age"}}

gcf_calculator

Compute the greatest common factor of 2–20 integers with exact BigInt arithmetic and complete prime factorizations.

Use gcf_calculator on the web

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{"id":1,"jsonrpc":"2.0","method":"tools/call","params":{"arguments":{"integers":["12","18","24"]},"name":"gcf_calculator"}}

get_transcript

Read public YouTube captions as timestamped plain text. Captions only, no video or audio.

Use get_transcript on the web

HTTP: GET /api/transcript.

{"id":1,"jsonrpc":"2.0","method":"tools/call","params":{"arguments":{"url":"https://www.youtube.com/watch?v=jNQXAC9IVRw"},"name":"get_transcript"}}

gpa_calculator

Computes credit-weighted GPA with A=4, B=3, C=2, D=1, F=0 and optional common honors +0.5/AP +1.0 bonuses for passing grades; school conventions vary.

Use gpa_calculator on the web

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{"id":1,"jsonrpc":"2.0","method":"tools/call","params":{"arguments":{"courses":[{"credits":3,"grade":"A","level":"ap"},{"credits":4,"grade":"B"}],"weighted":true},"name":"gpa_calculator"}}

grade_calculator

Computes a weighted category average and optionally the final-exam percentage needed to reach a target course grade.

Use grade_calculator on the web

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{"id":1,"jsonrpc":"2.0","method":"tools/call","params":{"arguments":{"categories":[{"score":80,"weight":40},{"score":90,"weight":60}],"finalWeight":20,"target":90},"name":"grade_calculator"}}

gravel_calculator

Calculate gravel layer volume and US short tons from rectangle dimensions, circle diameter or total area, depth in inches and editable bulk density.

Use gravel_calculator on the web

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{"id":1,"jsonrpc":"2.0","method":"tools/call","params":{"arguments":{"densityTonsPerCubicYard":1.4,"depthInches":3,"length":10,"shape":"rectangle","width":8},"name":"gravel_calculator"}}

har_to_openapi

Turn a HAR file (a browser network export) into an OpenAPI 3.1 description of the API calls in it. Cleans the file first: drops cookies and login headers and replaces secret-named headers, query parameters, form fields and JSON keys with REDACTED. Groups calls by host, method and path template (numeric ids, UUIDs and long hex or base64 path parts become parameters), and infers query parameters, request body schemas and response schemas per status from the samples. Sign-in methods are named, never copied; example values are off unless asked for. Leaves out page loads, static files and preflights unless asked. Returns the OpenAPI document as JSON and the endpoint count. Pure standard library, no network, model or clock.

Use har_to_openapi on the web

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{"id":1,"jsonrpc":"2.0","method":"tools/call","params":{"arguments":{"har":"{\"log\":{\"entries\":[{\"request\":{\"method\":\"GET\",\"url\":\"https://api.example.com/v1/items/42\"},\"response\":{\"status\":200}}]}}"},"name":"har_to_openapi"}}

heart_rate_zones

Calculate adult maximum heart rate and moderate and vigorous target zones from age and optional measured rates.

Use heart_rate_zones on the web

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{"id":1,"jsonrpc":"2.0","method":"tools/call","params":{"arguments":{"age":30,"resting":60},"name":"heart_rate_zones"}}

hours_calculator

Calculate worked minutes, decimal hours and H:MM from clock times, an overnight flag and an unpaid break.

Use hours_calculator on the web

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{"id":1,"jsonrpc":"2.0","method":"tools/call","params":{"arguments":{"breakMinutes":30,"end":"06:00","overnight":true,"start":"22:00"},"name":"hours_calculator"}}

inflation_calculator

Convert US dollars between published BLS CPI-U months or annual averages since 1913. Reports equivalent value, cumulative inflation, average annual rate and yearly table. Omit both months for annual mode; unavailable periods are rejected. Arithmetic on CPI, not financial advice.

Use inflation_calculator on the web

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{"id":1,"jsonrpc":"2.0","method":"tools/call","params":{"arguments":{"amount":100,"endMonth":1,"endYear":2020,"startMonth":1,"startYear":2000},"name":"inflation_calculator"}}

inspect_apk

Read an Android app file (.apk), given as base64, at most 2,000,000 bytes. Returns the package name, version, minimum, target and compile SDK; permissions grouped by what they reach, each with a plain meaning and whether Android asks the person first; activities, services, receivers and providers with whether each is exported and why; web addresses and hostnames found in the code's string tables, grouped by host; and the signer certificate (subject, issuer, validity, key, SHA-256) from the v1 signature or the v2/v3 signing block, read but never verified. Runs nothing. Pure standard library, no network or model.

Use inspect_apk on the web

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{"id":1,"jsonrpc":"2.0","method":"tools/call","params":{"arguments":{"file":"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"},"name":"inspect_apk"}}

inspect_binary

Read the structure of a program file: Windows PE (EXE or DLL, 32 or 64-bit), Linux ELF or Mac Mach-O (thin or universal), given as base64, at most 2,000,000 bytes. Returns the format, type, architecture, bitness and entry point; sections with file offset, size, address, access flags and entropy (bits per byte); imports per library and exports; PE resources, whether a PE certificate table or Mach-O code signature is present (never checked) and whether the file is a .NET assembly. Reads headers and tables only; runs nothing. Pure standard library, no network or model.

Use inspect_binary on the web

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{"id":1,"jsonrpc":"2.0","method":"tools/call","params":{"arguments":{"file":"f0VMRgIBAQAAAAAAAAAAAAIAPgABAAAAABBAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAEAAOAAAAEAAAAAAAA=="},"name":"inspect_binary"}}

json_formatter

Format, minify or validate JSON text while preserving number tokens.

Use json_formatter on the web

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{"id":1,"jsonrpc":"2.0","method":"tools/call","params":{"arguments":{"sort":true,"text":"{\"b\":2,\"a\":1}"},"name":"json_formatter"}}

julian_day_convert

Convert explicit UTC civil timestamps to Julian day and back using the proleptic Gregorian calendar. See the noon epoch, time-scale convention and ordinal day.

Use julian_day_convert on the web

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{"id":1,"jsonrpc":"2.0","method":"tools/call","params":{"arguments":{"convention":"proleptic-gregorian-utc","direction":"to-julian","value":"1970-01-01T00:00:00Z"},"name":"julian_day_convert"}}

kitchen_remodel_cost

Estimate a kitchen remodel budget from kitchen size and finishes. Size and scope return a national planning estimate range rounded to the nearest 100 dollars, with no published typical figure, two separate dated reference cards and sources. The result has no line items or labor/material split: the published bands include both, and no public source we trust splits them for a typical kitchen. Pure arithmetic, no network or model.

Use kitchen_remodel_cost on the web

HTTP: GET /api/kitchen-remodel-cost.

{"id":1,"jsonrpc":"2.0","method":"tools/call","params":{"arguments":{"area_sqft":150,"scope":"full"},"name":"kitchen_remodel_cost"}}

lcm_calculator

Compute the least common multiple of 2–20 integers with exact BigInt arithmetic and complete prime factorizations.

Use lcm_calculator on the web

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{"id":1,"jsonrpc":"2.0","method":"tools/call","params":{"arguments":{"integers":["12","18","24"]},"name":"lcm_calculator"}}

loan_schedule

Computes fixed-rate monthly principal and interest payments, total interest, payoff month and a complete amortization table of at most 360 rows from entered amounts and a nominal annual rate. Optional down payment reduces principal; extra monthly principal payments shorten the modeled term. Uses exact rational arithmetic and nearest-cent half-up rounding. Taxes, insurance, PMI and fees are excluded.

Use loan_schedule on the web

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{"id":1,"jsonrpc":"2.0","method":"tools/call","params":{"arguments":{"annualRatePercent":12,"principal":100,"termMonths":2},"name":"loan_schedule"}}

logarithm

Compute a logarithm for a positive value and any positive base other than 1.

Use logarithm on the web

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{"id":1,"jsonrpc":"2.0","method":"tools/call","params":{"arguments":{"base":10,"value":100},"name":"logarithm"}}

long_divide

Divide decimal strings exactly with long division steps, an integer quotient and remainder. See terminating, repeating or truncated decimals.

Use long_divide on the web

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{"id":1,"jsonrpc":"2.0","method":"tools/call","params":{"arguments":{"digits":20,"dividend":"7","divisor":"2"},"name":"long_divide"}}

make_barcode

Make an SVG barcode. Validates retail check digits and lengths. GS1-128 and GS1 DataMatrix accept bracketed (01)GTIN(17)YYMMDD(10)lot; use make_qr for QR codes.

Use make_barcode on the web

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{"id":1,"jsonrpc":"2.0","method":"tools/call","params":{"arguments":{"text":"Example text"},"name":"make_barcode"}}

make_qr

Make an SVG QR code for text, a URL, or Wi-Fi network details.

Use make_qr on the web

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{"id":1,"jsonrpc":"2.0","method":"tools/call","params":{"arguments":{"text":"Example text"},"name":"make_qr"}}

make_run_loop

Make walking/running loops that start and end at one point, each within 3% of the target distance. Returns Google Maps links and an encoded polyline. Routes and map data © OpenStreetMap contributors (ODbL); each result credits the routing service that made it.

Use make_run_loop on the web

HTTP: POST /api/run-loop.

{"id":1,"jsonrpc":"2.0","method":"tools/call","params":{"arguments":{"distance_km":1,"start":"Example start"},"name":"make_run_loop"}}

margin_calculator

Calculate cost, selling price, gross profit, margin percentage and markup percentage from two independent values including cost or price.

Use margin_calculator on the web

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{"id":1,"jsonrpc":"2.0","method":"tools/call","params":{"arguments":{"cost":80,"price":100},"name":"margin_calculator"}}

mass_volume_convert

Convert mass to volume or reverse with named units and either a USDA FoodData Central ingredient cup-weight preset or an entered positive density in g/mL.

Use mass_volume_convert on the web

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{"id":1,"jsonrpc":"2.0","method":"tools/call","params":{"arguments":{"density":0.5,"from":"g","to":"us_cup","value":"118.29411825"},"name":"mass_volume_convert"}}

mulch_calculator

Calculate mulch layer volume and whole 2 cu ft and 3 cu ft bag counts from rectangle dimensions, circle diameter or total area and depth in inches.

Use mulch_calculator on the web

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{"id":1,"jsonrpc":"2.0","method":"tools/call","params":{"arguments":{"depthInches":3,"length":10,"shape":"rectangle","width":8},"name":"mulch_calculator"}}

one_rep_max_calculator

Calculate Epley and Brzycki one-rep maximum estimates from lifted weight and repetitions.

Use one_rep_max_calculator on the web

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{"id":1,"jsonrpc":"2.0","method":"tools/call","params":{"arguments":{"reps":5,"weight":100},"name":"one_rep_max_calculator"}}

pace_calculator

Calculate running distance, elapsed time or pace from exactly two values and distance units.

Use pace_calculator on the web

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{"id":1,"jsonrpc":"2.0","method":"tools/call","params":{"arguments":{"distance":5,"time":"25:00"},"name":"pace_calculator"}}

page_check

Check whether one public HTML page shows content. Returns working, suspect or broken, findings with reasons and bounded snippets, status, final URL and text length. No JavaScript rendering; 10 seconds overall, 2 MB HTML. Public HTTP/HTTPS ports 80/443 only.

Use page_check on the web

HTTP: GET /api/page-check.

{"id":1,"jsonrpc":"2.0","method":"tools/call","params":{"arguments":{"url":"https://example.com/"},"name":"page_check"}}

page_to_markdown

Read one public HTML page as clean Markdown with title, headings, lists, tables and absolute links. No logins, paywalls or JavaScript rendering; 2 MB HTML limit.

Use page_to_markdown on the web

HTTP: GET /api/markdown.

{"id":1,"jsonrpc":"2.0","method":"tools/call","params":{"arguments":{"url":"https://example.com/"},"name":"page_to_markdown"}}

paint_quantity

Calculate paint volume and whole containers from entered area or supported surface geometry, openings, whole coats and user-supplied per-coat coverage.

Use paint_quantity on the web

Call this tool through MCP.

{"id":1,"jsonrpc":"2.0","method":"tools/call","params":{"arguments":{"area":"800","coats":2,"containerVolume":"1","coverage":"350","openings":"100"},"name":"paint_quantity"}}

pay_convert

Convert gross annual salary to hourly pay or hourly pay to annual salary using your entered weekly hours and paid weeks. Pure arithmetic.

Use pay_convert on the web

Call this tool through MCP.

{"id":1,"jsonrpc":"2.0","method":"tools/call","params":{"arguments":{"amount":52000,"direction":"annual-to-hourly","hoursPerWeek":40,"paidWeeks":52},"name":"pay_convert"}}

percentage_calculator

Calculate X percent of Y, X as a percentage of Y, or signed percentage change from X to Y.

Use percentage_calculator on the web

Call this tool through MCP.

{"id":1,"jsonrpc":"2.0","method":"tools/call","params":{"arguments":{"mode":"change","x":80,"y":100},"name":"percentage_calculator"}}

pickleball_court_cost

Check whether a pickleball court fits a space and show public court project costs. Returns rulebook footprints and one-court fit in either orientation, separate cost cards, and unpriced scope. Cost cards are public city project and planning figures, not a price for this court. Pure rules and Decimal, no network, model or clock. Web and MCP share the free daily allowance.

Use pickleball_court_cost on the web

HTTP: GET /api/pickleball-court-cost.

{"id":1,"jsonrpc":"2.0","method":"tools/call","params":{"arguments":{"courts":2,"size":"recommended","space_length_ft":70,"space_width_ft":40},"name":"pickleball_court_cost"}}

pole_barn_cost

Estimate pole barn construction costs for given dimensions, optionally finished as living space. Returns national construction ranges for the building only, with no published typical figure. Site work/slab/doors/height/permits are not priced. use=residential adds the separate living-space build-out band with an open top and a combined planning estimate. Includes an unpriced checklist, two separate unscaled reference cards and dated sources. Pure arithmetic, no network or model.

Use pole_barn_cost on the web

HTTP: GET /api/pole-barn-cost.

{"id":1,"jsonrpc":"2.0","method":"tools/call","params":{"arguments":{"length_ft":40,"use":"shell","width_ft":30},"name":"pole_barn_cost"}}

power

Compute a real number raised to an entered exponent with bounded inputs and explicit domain errors.

Use power on the web

Call this tool through MCP.

{"id":1,"jsonrpc":"2.0","method":"tools/call","params":{"arguments":{"base":2,"exponent":10},"name":"power"}}

prime_number_checker

Compute deterministic primality below 3.3 × 10^24 using the 13 prime Miller–Rabin bases through 41, plus complete factorization through 10^12 or a smallest factor through 10000.

Use prime_number_checker on the web

Call this tool through MCP.

{"id":1,"jsonrpc":"2.0","method":"tools/call","params":{"arguments":{"integer":"97"},"name":"prime_number_checker"}}

proofread

Fix spelling, grammar, punctuation and word choice while keeping meaning and voice. Text goes to a language model: with no key, a small shared daily allowance (Google Gemini); with an X-OpenRouter-Key header, the caller's OpenRouter key.

Use proofread on the web

HTTP: POST /api/proofread.

Needs the caller's OpenRouter key in the X-OpenRouter-Key header.

{"id":1,"jsonrpc":"2.0","method":"tools/call","params":{"arguments":{"text":"Example text"},"name":"proofread"}}

pythagorean_theorem_calculator

Compute the third right-triangle side from exactly two measured sides, both acute angles, the right angle and area using the Pythagorean theorem.

Use pythagorean_theorem_calculator on the web

Call this tool through MCP.

{"id":1,"jsonrpc":"2.0","method":"tools/call","params":{"arguments":{"a":3,"b":4,"unit":"m"},"name":"pythagorean_theorem_calculator"}}

quadratic_solve

Solve ax² + bx + c = 0 from entered coefficients. See real or complex roots, the discriminant and linear or constant cases.

Use quadratic_solve on the web

Call this tool through MCP.

{"id":1,"jsonrpc":"2.0","method":"tools/call","params":{"arguments":{"a":1,"b":-3,"c":2},"name":"quadratic_solve"}}

ratio_calculator

Simplify decimal A:B ratios, solve A:B = C:?, or scale the ratio to a target term or total.

Use ratio_calculator on the web

Call this tool through MCP.

{"id":1,"jsonrpc":"2.0","method":"tools/call","params":{"arguments":{"a":1.5,"b":2.5,"mode":"simplify"},"name":"ratio_calculator"}}

read_barcode

Read every barcode in a PNG, JPEG or WebP image, given as base64 (or a data URL), a public https URL, or an attached file. At most 2 MB and 4000 by 4000 pixels. Returns text, format, corner positions and GS1 product number, expiry and lot when present.

Use read_barcode on the web

Call this tool through MCP.

{"id":1,"jsonrpc":"2.0","method":"tools/call","params":{"arguments":{"url":"https://apitoolcalls.com/barcode-scanner/samples/ean13.png"},"name":"read_barcode"}}

recall_check

Search local U.S. CPSC data for up to 10 recall notices that may match — check the notice. updated_at is when this local copy of CPSC data was last refreshed (UTC, ISO 8601), not a recall date; each match's date is its notice date. May not cover every batch or country; read the notice. No CPSC endorsement.

Use recall_check on the web

HTTP: GET /api/recall-check.

{"id":1,"jsonrpc":"2.0","method":"tools/call","params":{"arguments":{"query":"Example query"},"name":"recall_check"}}

resume_gap

Compare résumé skills with Columbus, Ohio job postings, or with one pasted job description. Résumé is not stored.

Use resume_gap on the web

HTTP: POST /api/resume.

{"id":1,"jsonrpc":"2.0","method":"tools/call","params":{"arguments":{"job_ad":"Data analyst. Required: SQL, Python and Tableau.","resume_text":"Data analyst with SQL and Excel experience building weekly reports."},"name":"resume_gap"}}

retirement_drawdown

Arithmetic on entered numbers only: level end-of-period withdrawal, total withdrawn and complete period table from a balance, fixed entered nominal annual return and term. Monthly, quarterly or annual periods; nearest-cent half-up rounding; final withdrawal clears residue. Rates are entered, never fetched.

Use retirement_drawdown on the web

Call this tool through MCP.

{"id":1,"jsonrpc":"2.0","method":"tools/call","params":{"arguments":{"annualReturnPercent":10,"balance":100,"frequency":"annually","years":2},"name":"retirement_drawdown"}}

roi

Compute net gain and return on investment percentage from entered cost and final value, with optional annualization.

Use roi on the web

Call this tool through MCP.

{"id":1,"jsonrpc":"2.0","method":"tools/call","params":{"arguments":{"cost":100,"finalValue":125},"name":"roi"}}

roman_numeral

Convert whole numbers from 1 to 3999 to canonical Roman numerals, or convert canonical Roman numerals to numbers.

Use roman_numeral on the web

Call this tool through MCP.

{"id":1,"jsonrpc":"2.0","method":"tools/call","params":{"arguments":{"direction":"to_roman","value":"1994"},"name":"roman_numeral"}}

roof_replacement_cost

Estimate sloped roof area and roofing squares from a measured footprint and pitch. Calculates optional shingle purchase allowance, historical asphalt installation and matched removal scenarios, verified historical standing-seam bid endpoints, and a benchmark subtotal with your separately quoted extras; missing local prices remain get a local quote.

Use roof_replacement_cost on the web

HTTP: GET /api/roof_replacement_cost.

{"id":1,"jsonrpc":"2.0","method":"tools/call","params":{"arguments":{"footprint_sqft":1000,"layers":2,"material":"asphalt","pitch":6,"waste_percent":10},"name":"roof_replacement_cost"}}

round_decimal

Round decimal strings exactly to decimal places, tens, hundreds or other powers of ten. Choose half away from zero or half even, including negative ties.

Use round_decimal on the web

Call this tool through MCP.

{"id":1,"jsonrpc":"2.0","method":"tools/call","params":{"arguments":{"places":0,"text":"-2.5","tieMode":"half-even"},"name":"round_decimal"}}

round_sig_figs

Round a decimal string to a chosen number of significant figures using exact decimal half-up rounding; return plain and scientific notation.

Use round_sig_figs on the web

Call this tool through MCP.

{"id":1,"jsonrpc":"2.0","method":"tools/call","params":{"arguments":{"significantFigures":2,"value":"0.004560"},"name":"round_sig_figs"}}

scientific_evaluate

Evaluate arithmetic, powers, roots, logs and trigonometric functions with parentheses. Choose degrees or radians and get finite real results.

Use scientific_evaluate on the web

Call this tool through MCP.

{"id":1,"jsonrpc":"2.0","method":"tools/call","params":{"arguments":{"angleUnit":"degrees","expression":"2^3 + sqrt(81)"},"name":"scientific_evaluate"}}

scientific_notation

Normalize decimal strings to scientific notation or expand exponent notation exactly. Keep all entered numerical digits without binary float conversion.

Use scientific_notation on the web

Call this tool through MCP.

{"id":1,"jsonrpc":"2.0","method":"tools/call","params":{"arguments":{"mode":"normalize","text":"0.00012"},"name":"scientific_notation"}}

seo_check

Check one public HTML page with fixed SEO rules. Returns schema 1, score, strengths, ranked fixes and facts. No JavaScript rendering; 10 seconds overall, 2 MB HTML and at most 20 links. Public HTTP/HTTPS ports 80/443 only.

Use seo_check on the web

HTTP: GET /api/seo-check.

{"id":1,"jsonrpc":"2.0","method":"tools/call","params":{"arguments":{"url":"https://example.com/"},"name":"seo_check"}}

simplify_sqrt

Rewrite the square root of an integer from 0 to 10^12 as a√b using exact integer factors.

Use simplify_sqrt on the web

Call this tool through MCP.

{"id":1,"jsonrpc":"2.0","method":"tools/call","params":{"arguments":{"value":72},"name":"simplify_sqrt"}}

slope_calculator

Compute slope, y-intercept, slope-intercept and point-slope equations, distance, midpoint and line inclination from two distinct points, including vertical lines.

Use slope_calculator on the web

Call this tool through MCP.

{"id":1,"jsonrpc":"2.0","method":"tools/call","params":{"arguments":{"x1":0,"x2":1,"y1":1,"y2":2},"name":"slope_calculator"}}

square_footage_calculator

Computes and sums rectangle, circle, triangle and L-shaped room areas in square feet and square metres.

Use square_footage_calculator on the web

Call this tool through MCP.

{"id":1,"jsonrpc":"2.0","method":"tools/call","params":{"arguments":{"rooms":[{"length":12,"shape":"rectangle","width":10},{"cutoutLength":4,"cutoutWidth":3,"length":12,"shape":"l-shape","width":10}],"unit":"ft"},"name":"square_footage_calculator"}}

time_card_calculator

Sum up to seven clock-time shifts and optionally split the total into regular minutes and minutes past 40 hours.

Use time_card_calculator on the web

Call this tool through MCP.

{"id":1,"jsonrpc":"2.0","method":"tools/call","params":{"arguments":{"overtime":true,"rows":[{"breakMinutes":30,"end":"18:30","start":"09:00"},{"breakMinutes":30,"end":"18:30","start":"09:00"},{"breakMinutes":30,"end":"18:30","start":"09:00"},{"breakMinutes":30,"end":"18:30","start":"09:00"},{"breakMinutes":30,"end":"18:30","start":"09:00"}]},"name":"time_card_calculator"}}

tip_calculator

Calculate a bill tip and equal per-person shares, with cent rounding or optional whole-dollar rounding up.

Use tip_calculator on the web

Call this tool through MCP.

{"id":1,"jsonrpc":"2.0","method":"tools/call","params":{"arguments":{"bill":100,"people":3,"roundUp":true,"tipPercent":18},"name":"tip_calculator"}}

unit_convert

Convert a bounded decimal or fraction quantity between explicit compatible mass, volume, international length, speed or item-count units. Reject incompatible dimensions; no density is inferred.

Use unit_convert on the web

Call this tool through MCP.

{"id":1,"jsonrpc":"2.0","method":"tools/call","params":{"arguments":{"from":"us_qt","to":"us_cup","value":"1 1/2"},"name":"unit_convert"}}

unit_price

Compare package prices per equal mass, volume or whole item count in one entered currency, with exact tie detection and compatible units only.

Use unit_price on the web

Call this tool through MCP.

{"id":1,"jsonrpc":"2.0","method":"tools/call","params":{"arguments":{"currency":"USD","packages":[{"price":"3","quantity":"500","unit":"g"},{"price":"5","quantity":"1","unit":"kg"}],"targetUnit":"g"},"name":"unit_price"}}

volume_calculator

Computes cube, box, cylinder, cone, sphere or rectangular-pyramid volume with its formula and cubic-unit conversions.

Use volume_calculator on the web

Call this tool through MCP.

{"id":1,"jsonrpc":"2.0","method":"tools/call","params":{"arguments":{"height":5,"length":3,"shape":"box","unit":"m","width":4},"name":"volume_calculator"}}

water_softener_size

Size a water softener from household water use and tested hardness, with yearly salt cost. Gallons per person per day is required (no national default used), for softened water only. Iron is optional; unknown when absent, and changes the setting per EcoPure's clear-water ferrous iron rule (5 gpg per ppm); other makers differ. Returns grains per day, working capacity before reserve, optional paired model ratings, three idealized EP42 test-rating examples, notes, assumptions and dated primary sources. Costs are salt only. Pure Decimal arithmetic, no network or model.

Use water_softener_size on the web

HTTP: GET /api/water-softener-size.

{"id":1,"jsonrpc":"2.0","method":"tools/call","params":{"arguments":{"gallons_per_person_day":75,"hardness":10,"people":4},"name":"water_softener_size"}}

wheelchair_ramp

Plan wheelchair ramp length from entrance rise. Returns the minimum horizontal run under ADA 2010 §405.2, cited width, landing, rise-per-run and handrail dimensions, and separate historical HUD accessibility cost cards with missing price cells visible. This is a planning guide, not a code inspection.

Use wheelchair_ramp on the web

HTTP: GET /api/wheelchair-ramp.

{"id":1,"jsonrpc":"2.0","method":"tools/call","params":{"arguments":{"rise_inches":20},"name":"wheelchair_ramp"}}

word_count

Count words, characters, sentences and paragraphs and estimate reading and speaking times from text.

Use word_count on the web

Call this tool through MCP.

{"id":1,"jsonrpc":"2.0","method":"tools/call","params":{"arguments":{"text":"Hello world."},"name":"word_count"}}

yard_drainage_cause

Find likely causes of water pooling in a yard, fix options, who does them and dated public cost estimates. Returns likely causes to investigate, not a diagnosis, with explainable observed-code rules, safety escalations, options and who does them. Prices are dated public planning estimates, with distinct scopes and source years; no 2026 price adjustment. Omit unknown groups; [] means none observed. Optional numbers price only agreed areas, designed storage or counted downspout sets; the soil check screens root-zone drainage. No network or model. Web and MCP share the free daily allowance.

Use yard_drainage_cause on the web

HTTP: GET /api/yard-drainage.

{"id":1,"jsonrpc":"2.0","method":"tools/call","params":{"arguments":{"downspouts":3,"gutters":["discharge_near_foundation"]},"name":"yard_drainage_cause"}}

z_score

Compute the standardized z score from an entered value, mean and positive standard deviation.

Use z_score on the web

Call this tool through MCP.

{"id":1,"jsonrpc":"2.0","method":"tools/call","params":{"arguments":{"mean":70,"standardDeviation":10,"value":85},"name":"z_score"}}