API Ninjas offers over 120 unique APIs across various categories, enabling developers to build real applications with real data.

Use it from your agent

One ClawLink account serves every agent you run. Pick the guide for yours, or connect API Ninjas once and call the same tools from all of them.

API Ninjas for OpenClawInstall, pair, connect, first prompt

API Ninjas for Hermes AgentInstall, pair, connect, first prompt MCPClaude Code, Cursor, any MCP clientCLI login or the remote MCP server

Setup

Connect API Ninjas through ClawLink's hosted setup to use its tools from your agent.

Auth: Paste one API key. The credential stays on the ClawLink server; your agent holds only a ClawLink key you can revoke.
Where: the ClawLink dashboard, or ask your agent to connect it.

What your agent can do

API Ninjas exposes 246 tools through ClawLink. The 30 most used are listed here; your agent sees all of them.

Tool	What it does	Kind
`api_ninjas_analyze_sentiment`	Analyze the sentiment of text	Read
`api_ninjas_calculate_calories_burned`	Calculate calories burned for an activity based on duration and body weight	Read
`api_ninjas_calculate_mortgage`	Calculate mortgage payments and breakdowns	Read
`api_ninjas_calculate_sales_tax`	Calculate sales tax for a purchase amount at a US location	Read
`api_ninjas_check_domain`	Check domain availability and retrieve registration information	Read
`api_ninjas_analyze_nutrition`	Extract nutrition information from text query	Read
`api_ninjas_assess_naics_risk`	Assess documented compliance risk indicators for NAICS codes	Read
`api_ninjas_calculate_airport_distance`	Calculate great-circle distance, initial bearing, and estimated flight time between two airports	Read
`api_ninjas_calculate_currency_volatility`	Calculate realized volatility and percentile context for a currency pair	Read
`api_ninjas_calculate_income_tax`	Calculate income taxes for US and Canada	Read
`api_ninjas_calculate_paycheck_withholding`	Calculate federal, FICA, and optional state paycheck withholding	Read
`api_ninjas_check_bank_holiday`	Check whether banks are closed on a date in a country or subdivision	Read
`api_ninjas_check_disposable_email`	Check whether an email address is from a disposable email provider	Read
`api_ninjas_check_holiday`	Return all documented holiday categories on a date across every country when country is	Read
`api_ninjas_check_is_public_holiday`	Check if a specific date is a public holiday in a given country	Read
`api_ninjas_check_is_working_day`	Check if a date is a working day in a specific country	Read
`api_ninjas_check_lottery_ticket`	Score a supported lottery ticket against a draw	Read
`api_ninjas_check_sales_tax_nexus`	Evaluate supplied sales and transaction totals against a state's economic-nexus rules	Read
`api_ninjas_check_spelling`	Check spelling and get corrections for text	Read
`api_ninjas_classify_business_naics`	Classify a business description to a NAICS code	Read
`api_ninjas_compute_text_similarity`	Compute semantic similarity between two texts	Read
`api_ninjas_convert_airport_code`	Resolve an IATA, ICAO, GPS, ident, or local airport code to the matching airport record	Read
`api_ninjas_convert_currency`	Convert between currencies using current exchange rates	Read
`api_ninjas_convert_unit`	Convert between measurement units across different categories	Read
`api_ninjas_detect_faces`	Detect faces and return their pixel bounding boxes in a JPEG or PNG image	Read
`api_ninjas_detect_objects`	Detect labeled objects and bounding boxes in a JPEG or PNG image	Read
`api_ninjas_detect_text_language`	Detect the language of input text	Read
`api_ninjas_extract_text_from_image`	Extract text blocks and pixel bounding boxes from a JPEG or PNG image	Read
`api_ninjas_extract_webpage_content`	Extract main content and metadata from a webpage	Read
`api_ninjas_filter_profanity`	Detect and censor profanity in text	Read