API Anything

API Anything is an open source agent tool that turns any website into a plain HTTP API for autonomous agents.

API Anything turns websites without APIs into callable endpoints for agents. When an agent needs a site, it learns the request, strips out cookies and tokens, and shares the spec in a catalog. The next agent skips the browser, fetching JSON via a single HTTP request. Calls run on each user's machine at human volume, and the catalog stores specs without proxying requests. Secrets stay home, and operations are verified and repaired collaboratively by users across networks.

API Anything at a glance

Best for: Software engineer
Runs on: Node, CLI, VS Code, API, open source
Pricing: Free
Released: September 2026
Category: AI agent tool
Website: github.com/goodnight000/api-anything

Key features

Learns site requests using a headless browser
Calls operations using plain HTTP without a browser
Shares learned specs without credentials
Repairs drifted requests automatically
Connects to MCP servers for various clients
Supports tools like findsites, learnsite, and calloperation

Use it for

Turning sites without APIs into endpoints
Fetching Goodreads data without an official API
Scraping Google Flights data via HTTP requests
Automating tasks with coding and chat agents

Alternatives to API Anything

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APIStack — Connect AI agents to over 100 tools using one API key or a single MCP endpoint.
Agents Anywhere — Manage and continue coding agent sessions across desktop, mobile and web.
Anything Analyzer — Unified packet capture across browsers, apps, and CLI for AI-assisted analysis.
Composio — Equips AI agents with tools, managed user auth, and sandboxes across 1,500+ apps
Agent Reach — Provides zero API fees, multi-backend routing, and local credential storage.
Page Agent — Integrates directly into web pages without browser extensions or headless browsers.
Adyen — Share AI agent resources across coding tools and repositories easily.
WebBrain — Runs locally or in the cloud with your choice of LLM and zero telemetry.
OpenBot — Runs entirely on your own infrastructure with strict document permissions and custom.
Webwright — Enables code-based web automation with reusable and rerunnable scripts.
Coop Anything — Turns single-player games into multiplayer experiences using AI agents.

All API Anything alternatives