API Ninjas icon

API Ninjas

General-purpose utility API collection for text sentiment, financial lookups, calculators, image generation, and reference data.

Covers small developer utilities including sentiment analysis, barcode generation, BIN lookups, mortgage and tax calculators, holiday checks, and domain availability.

API Ninjas icon
Snow

Use API Ninjas with Snow

Snow is a personal AI assistant that builds real apps for you, and they can put API Ninjas to work.

What Snow can do with API Ninjas

These are the API Ninjas actions available to the apps you build with Snow. Connecting an account does not make Snow run these on its own.

Analyze Text Sentiment

Tool to analyze the sentiment of text. Returns a numerical sentiment score from -1 to 1 and a classification (POSITIVE, WEAK_POSITIVE, NEUTRAL, WEAK_NEGATIVE, or NEGATIVE). Use when you need to determine the emotional tone or sentiment of text content.

Calculate Calories Burned

Tool to calculate calories burned for an activity based on duration and body weight. Use when you need to estimate energy expenditure for physical activities.

Calculate Mortgage

Tool to calculate mortgage payments and breakdowns. Use when you need to determine monthly/annual payments, including mortgage, property tax, HOA, and insurance components.

Calculate Sales Tax

Tool to calculate sales tax for a purchase amount at a US location. Use when you need to determine the sales tax for a purchase based on ZIP code or city/state. Premium features include detailed breakdowns by city, county, and special districts.

Check Domain Availability

Tool to check domain availability and retrieve registration information. Use when you need to verify if a domain is available for registration or get details about an existing domain.

Check If Date Is Public Holiday

Tool to check if a specific date is a public holiday in a given country. Use when you need to verify holiday status for scheduling, planning, or calendar-related tasks. Returns holiday name if applicable.

Check If Date Is Working Day

Tool to check if a date is a working day in a specific country. Returns whether the date is a working day, accounting for weekends and public holidays. Use when you need to determine if a business is likely to be open on a specific date.

Check Spelling

Tool to check spelling and get corrections for text. Returns the original text, corrected version, and detailed corrections with alternative suggestions.

Compute Text Similarity

Tool to compute semantic similarity between two texts. Returns a similarity score from 0 to 1 using NLP embeddings and cosine similarity. Use when comparing text content, detecting duplicates, or measuring semantic relatedness.

Convert City to Coordinates

Tool to convert city names to geographic coordinates (forward geocoding). Returns latitude, longitude, and country code for specified city. Use when you need to find the coordinates of a location by its name.

Ready to put API Ninjas to work?

Sign up free, build an app by chatting, and connect API Ninjas in minutes. No credit card required.