The best API tools. Page 3 of 4.

crawlable.app

Data Pipelines & ETL

Turns any website into clean, structured data without writing scrapers

Crawlkit

API Tools

Web crawling API for extracting public data from URLs and social and app store platforms

CreatorCrawl

API Tools

Social media data API and MCP server that gives AI agents live data from TikTok, Instagram, YouTube and more

Cronofy

API Tools

Calendar API and scheduling infrastructure for connecting calendars to apps

Crouter

AI Infrastructure

AI API gateway giving one endpoint to Claude, GPT and Gemini models for coding tools and agents

Diffbot

API Tools

AI web extraction and knowledge graph API that turns pages into structured data

Docstron

API Tools

API that generates PDFs from HTML templates for invoices, reports and certificates

doloc

Localization

API-first tool that translates localization files such as xliff, json and arb with context awareness

Dowsr

API Tools

Connects AI agents to market data that is hard to collect with web search alone

EasyPost

API Tools

Shipping API for rates, labels, tracking and address verification across carriers

Fiddler

API Tools

Telerik web debugging proxy for inspecting HTTP and HTTPS traffic

Hookdeck

API Tools

Webhook and event gateway for receiving, queuing and retrying webhooks

IBM API Connect

API Tools

IBM platform for creating, securing and managing APIs

Desktop API client for gRPC, REST and WebSocket with file-based collections

Merge

API Tools

Unified API for integrating with many HR, CRM and ticketing systems

Metronome

Finance & Accounting

Usage-based billing platform for metered pricing, acquired by Stripe

Mintlify

Docs & Wikis

Developer documentation platform with API reference pages and AI search

Mockaroo

API Tools

Generates realistic test data and mock APIs exportable as JSON, CSV or SQL

Moesif

API Tools

API analytics and usage-based billing insights, now part of WSO2

Nylas

API Tools

Email, calendar and contacts API for connecting apps to user inboxes

Orb

Finance & Accounting

Usage-based billing platform for metered and subscription pricing

Oxylabs

API Tools

Proxy network and web scraping API provider

Pactflow

API Tools

Hosted broker for consumer-driven contract testing of APIs, built on Pact

Paragon

API Tools

Embedded integration platform for building customer-facing integrations in SaaS products

Prismatic

API Tools

Embedded integration platform for B2B software companies

Proxyman

API Tools

Native macOS HTTP debugging proxy for inspecting app network traffic

RapidAPI

API Tools

API marketplace for discovering, testing and subscribing to third-party APIs

ReadMe

API Tools

Hosted API documentation and developer hub with usage analytics

ReadyAPI

API Tools

SmartBear suite for functional, security and load testing of REST, SOAP and GraphQL APIs

Recall.ai

API Tools

API for capturing audio, video and transcripts from Zoom, Meet and Teams calls

Redocly

API Tools

API documentation, linting and governance tooling built on OpenAPI

Retell AI

AI Tools

Platform for building AI phone agents for call handling

ScraperAPI

API Tools

Web scraping API with proxy rotation, CAPTCHA handling and JavaScript rendering

ScrapingBee

API Tools

Web scraping API that handles headless browsers and proxy rotation

Serper

Search

Google Search results API for developers and AI agents

Speakeasy

API Tools

Generates SDKs, Terraform providers and docs from OpenAPI specs

Stainless

API Tools

Generates typed client SDKs and docs from OpenAPI specs

Stellate

API Tools

GraphQL edge caching and metrics service

Stigg

Finance & Accounting

Pricing and entitlements infrastructure for managing plans, usage limits and billing

Stoplight

API Tools

API design, documentation and governance platform now owned by SmartBear

SwaggerHub

API Tools

Collaborative platform for designing and documenting OpenAPI-based APIs

Testfully

API Tools

API testing, documentation and monitoring in one product with offline and cloud modes

Theneo

API Tools

API documentation platform with AI-assisted writing and developer portals

Thunder Client

API Tools

REST API client extension that runs inside VS Code

Treblle

API Tools

API observability, documentation and scoring built from live request traffic

Vapi

AI Tools

Developer platform for building and deploying voice AI agents

Webhook.site

API Tools

Gives temporary URLs for inspecting and testing incoming webhook requests

WireMock Cloud

API Tools

Hosted API mocking and simulation service from the creators of WireMock