Best Api Reference Apps

API Bot

API calls at your fingertips

Free

This tool empowers mobile developers to build and test APIs directly on their devices. It leverages on-device machine learning to analyze API results and identify patterns, while also allowing for the creation and management of various request types and data formats.

HTTPBot: API & HTTP Client

API, MCP & WebSocket Debugger

Free

This app allows users to send HTTP/HTTPS requests and connect to WebSockets, making it easy to debug APIs on the go. It supports various response formats, collaboration features, and authentication methods, streamlining API development and testing.

npn.dev

An HTTP client that works

Free

This tool allows developers to explore and test HTTP APIs efficiently. It prioritizes speed and accuracy for a seamless development experience.

Api token Pricing Calculator

AI API prompt token cost tool

Free

Estimate AI API costs by inputting prompt and response tokens. This tool helps optimize budgets and control expenses for AI projects, offering real-time pricing based on token usage.

JavaScript Manual

JS syntax reference, tutorials

Free

An offline, ad-free guide to JavaScript, covering its core guide, built-in objects, and Web API. Access comprehensive documentation without an internet connection.

Gammon API Gravity Calculator

by Gammon Technical Products

$9.99

Calculate corrected API gravity for jet, gasoline, and diesel fuels at 60°F. This digital tool also determines the total weight of the fuel, replicating the functionality of physical slide calculators.

REST API Client

REST API and GraphQL Client

Free

This tool allows users to send and analyze API requests with customizable parameters, authorization, and body content. It offers robust search and filtering capabilities for managing saved requests, optimized for iPadOS with keyboard support.

API-Client Testing

REST API

Free

Send and analyze HTTP/HTTPS requests directly from your mobile device. Save requests to collections for easy reuse and view detailed response information, including headers and round trip time. Customize connection timeout settings for efficient testing.

Merfi AI: Text to Speech, TTS

Powered by murf.ai API

Free

Transform written text into natural-sounding speech with a variety of languages and voices. This tool is perfect for students, professionals, or anyone who wants to experience written content audibly. Enjoy high-quality audio and multi-language support.

Curly — REST API Client

REST API Client for Developers

Free

A native REST API client for iOS and iPad, designed for developers to test and debug APIs efficiently. It supports various request methods, response inspection with syntax highlighting, and collection organization.

ApiClient: REST API Tester

HTTP Client for GraphQL & cURL

Free

Test and manage REST APIs directly from your phone. Import, edit, and export Postman collections, send Firebase notifications, and format JSON requests on the go. Save API requests and responses for easy access and sharing.