API Anything

Name: API Anything
Author: goodnight000

by goodnight000version 0.4.0i★ –iRuns on your computer

Registry nameio.github.goodnight000/api-anything

Install

Overview

Description from the maker (original English)

Call websites as APIs: a shared catalog of operations learned from each site's own requests.

PopNx MCP’s three pillars

These three are never merged into one score: opinions, measurements and popularity are different things.

User voiceiNo reviews yetReviews open together with accounts in a later step
Our basic checksi1 of 1 passedChecked from public information; code not scanned yet
UsageiGrowing↓ 5.4K/wk · ★ –

What you can do with it

We have not written a plain-language summary for this one yet. Below are the facts we read from the registry.

Connection: Runs on your computer
Transport: stdio
Category: Web & browsers

Install

Pick the AI app you use, then copy the settings.

Before you install

Basic checks: 1 of 1 passed
Runs on your computer with your user’s permissions (files, network, apps).
You fill in yourself: API_ANYTHING_HOME, API_ANYTHING_BROWSER

You need

npmNode.js installed (for the npx command)

Which app do you use?

ClaudeClaude CodeCursorVS CodeChatGPT

Pick your app above. We remember it, so next time the button says “Install in …”.

Open Claude Desktop → Settings → Developer → Edit Config, and paste this into claude_desktop_config.json

{
  "mcpServers": {
    "api-anything": {
      "command": "npx",
      "args": [
        "-y",
        "api-anything",
        "mcp"
      ],
      "env": {
        "API_ANYTHING_HOME": "your-value",
        "API_ANYTHING_BROWSER": "your-value"
      }
    }
  }
}

Run this in your terminal

claude mcp add api-anything --env API_ANYTHING_HOME=your-value --env API_ANYTHING_BROWSER=your-value -- npx -y api-anything mcp

Fill in the empty values before running it.

Open in Cursor

Or copy the settings yourself

Paste into .cursor/mcp.json in your project, or ~/.cursor/mcp.json

{
  "mcpServers": {
    "api-anything": {
      "command": "npx",
      "args": [
        "-y",
        "api-anything",
        "mcp"
      ],
      "env": {
        "API_ANYTHING_HOME": "your-value",
        "API_ANYTHING_BROWSER": "your-value"
      }
    }
  }
}

Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.

Open in VS Code

Or copy the settings yourself

Paste into .vscode/mcp.json in your project

{
  "servers": {
    "api-anything": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "api-anything",
        "mcp"
      ],
      "env": {
        "API_ANYTHING_HOME": "your-value",
        "API_ANYTHING_BROWSER": "your-value"
      }
    }
  }
}

Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.

This one runs on your computer, and ChatGPT can only connect to servers on the internet. Pick another app.

Your choice stays on this device in a cookie; no account needed.

Values you fill in

API_ANYTHING_HOME env
Directory for learned sites, sessions and settings. Defaults to ~/.api-anything.
API_ANYTHING_BROWSER env
Chromium browser used to learn sites and for the browser tier, by name (brave) or path. Defaults to Google Chrome.

These settings are generated from the maker’s registry entry. If the README says otherwise, follow the README.

What it can do

Runs on your computer; the tool list appears in your AI app after you install it.

Basic checksi

We check information anyone can see; we have not read the code. Checks that do not apply are left out of the count. · Checked Nov 8, 2026

✓ Pass
Maker matches the repo
The registry name was verified with the GitHub account goodnight000, which owns the repo
… Not checked yet
Still maintained
We have not read this repo from GitHub yet
… Not checked yet
Has a licence
We have not read this repo from GitHub yet
– Not applicable
Endpoint responds
This one runs on your computer; there is no internet endpoint
– Not applicable
Sign-in with OAuth
Runs on your computer and uses local settings instead
… Not checked yet
No hidden instructions in tool descriptions
Runs on your computer; we can only read tool lists from internet endpoints

Compared with others in Web & browsersi

More stars than 0% of the other 1381 servers in this category
Published to the registry more recently than 94% of the other 1381 servers in this category
Basic checks equal to or better than 100% of the other 1381 servers in this category

Compared with every active server in this category in the registry. Stars count only when the publisher owns the repo.

Common questions

Is API Anything safe?

It passed 1 of 1 applicable basic checks. We have not read the code. Before adding a key or token, see what access the server asks for and use a key with only the permissions you need.

What keys or codes does it need?

The registry does not list a required key, though some servers ask you to sign in on first use.

Does it run on my computer or in the cloud?

It runs on your computer. Your AI app starts it when needed, and data does not pass through the maker’s servers (unless it calls an online service itself).

Is it still maintained?

The GitHub repo last changed –, and the latest version (0.4.0) reached the registry 2 days ago.

Which apps can use it?

Apps that support MCP, such as Claude Desktop, Claude Code, Cursor and VS Code. You also need Node.js on your computer.

What can I use instead?

In the same category: Browser Use, Chrome DevTools MCP, MCP Server Browser

Alternatives

Servers in the same category from other makers, sorted by stars.

Reading a card:↓ Downloads per weeki★ GitHub starsiThree pillars: reviews · checks · usageiUpdated = latest version published to the registryi

Browser Use

Lets AI do web tasks for you, such as filling forms, searching and extracting data, in the maker’s cloud browsers or on your computer.

by browser-useWidely used↓ 1.6M/wk★ 120.1KUpdated 18 days ago

Computer or cloud✓ browser-use.com

Install

Chrome DevTools MCP

Lets AI use Chrome’s developer tools to inspect pages, find what makes them slow and spot errors. Made by the Chrome DevTools team.

by ChromeDevToolsWidely used↓ 1.9M/wk★ 54.8KUpdated 17 days ago

Runs on your computer

Install

MCP Server Browser

MCP server for browser use access

by bytedanceWidely used↓ 792/wk★ 39.6KUpdated 14 months ago

Runs on your computer

Install

README from the maker

Open the README

Copied from the maker’s repo as written. PopNx MCP has not reviewed or endorsed it. HTML, images and scripts are removed. Links lead off this site.

When an agent needs a website that has no API, it learns one. Every other agent gets it for free.

Learned from the site's own requests, called over plain HTTP, verified and repaired by the agents that use it.

Quick start · Example · The race · How it works · Use it anywhere · Catalog · Safety · Docs

Goodreads stopped giving out API keys in 2020. Google Flights never had a public API. An agent that needs either one drives a browser: it clicks, waits, reads the screen, and pays for every step in time and tokens. API Anything learns the request the site's own page sends, once, and then calls it over plain HTTP. It shares what it learned, with every cookie and token stripped out, so the next agent gets JSON from one request.

Quick start

npx -y api-anything setup

Setup lists the agents it finds (Claude Code, Codex, Cursor, Claude Desktop, Gemini CLI, VS Code) and asks which to connect the MCP server and the skill to; --agents names them instead, and the always-on Hermes gateway is added only by name. Then it asks whether to help build the shared catalog. setup --local-only keeps everything on this machine. Node 22.13 or newer; no account, no API key. Or tell your coding agent: *Set up API Anything for me: https://github.com/goodnight000/api-anything/blob/main/INSTALL.md*. What setup changes, and every client

Restart the agent and ask it something like *"What does Goodreads rate Piranesi?"*, or call an operation yourself:

npx -y api-anything call hacker-news search query=sqlite

{"ok":true,"class":"ok","tier":1,"data":[

{"title":"Hosting SQLite databases on GitHub Pages or any static file hoster", ...}, ...], "ms":185}

tier: 1 means one plain HTTP request, with no browser and no account. A failure says what happened (class), why (reason) and what to do next (next).

Who's talking about your project

You shipped something. Is anyone talking about it? Finding out means five search pages, or five different APIs with their own keys, OAuth apps and client libraries. examples/mentions.mjs asks Hacker News, Reddit, YouTube, GitHub and Mastodon at once, from an empty home, with no account:

The core of it is six reads in parallel, each capped at plain HTTP:

import { call } from "api-anything";

const sources = [ ["hacker-news", "searchByDate", { query: project }], ["hacker-news", "searchByDate", { query: project, type: "comment" }], ["reddit", "search", { query: project }], ["youtube", "search", { q: project, filter: uploaded }], ["github", "searchRepos", { q: ${project} created:>${sinceDay} }], ["mastodon", "tagTimeline", { tag: project }], ]; const results = await Promise.all(sources.map(([site, op, args]) => call(site, op, args, { maxTier: 1 })));

Run it from a checkout after npm ci: node examples/mentions.mjs , with --days 30 for a wider window or --json for every link, for a script or a cron job.

On 2026-11-06, five runs from empty homes took 1.8 to 2.0 s each, Node's start included. Every run found the same 65 mentions. YouTube, GitHub, Mastodon and both Hacker News searches answered over plain HTTP. Reddit served a JavaScript challenge every time, and the script reported it as blocked and kept the rest. Transcript and details

The race

Same agent, same prompt, started together. Left: it drives headless Chrome. Right: it calls API Anything's Google Flights operation.

1.5 to 2× sooner · about half the tokens · the same cost or less · 20 of 20 answers correct

Claude Opus 5.5 in Claude Code, 2026-09-28. Shown at 3× speed with no cuts; the timers show real elapsed time. MP4 · how it was recorded

On 2026-10-31 the same comparison on two more sites gave medians of 22.3 s against 9.6 s (Netflix episodes) and 31.4 s against 18.1 s (IKEA store addresses), 20 of 20 answers correct. Each is one site, one model and a few runs. Method, raw numbers and limits

How it works

Learn. A headless browser loads the page for two example inputs. What changed becomes a parameter, the rest is kept byte for byte, and cookies become references. No LLM is involved.
Call. Send the request with Node's fetch. If the site blocks that, fetch from inside a browser page; as a last resort for a read, run the page and read its answer.
Repair. When the answer stops fitting, take the version another install repaired, or re-learn and save only after a replay works. A call that can't be repaired returns an error, never someone else's data.

The whole idea in 49 seconds · replay, fallback and repair · design

Use it anywhere

MCP over stdio, for any agent: find_sites, call_operation, learn_site and the other tools, which declare output schemas for clients that check results. Frameworks: Vercel AI SDK, LangChain.js, OpenAI Agents SDK.
HTTP: api-anything serve answers REST, publishes an OpenAPI document at /openapi.json, and serves MCP at /mcp. It listens on loopback only and needs a token. docs/SERVE.md
Python: pip install "git+https://github.com/goodnight000/api-anything#subdirectory=python" gives a Client that starts the server for you, tools for agent frameworks, and typed code generated from an operation's schema. docs/PYTHON.md
TypeScript: import { call } from "api-anything", or api-anything/host for an agent host that only calls installed operations. CLI and library at a glance
Watching: --changes reports what was added, removed or changed since the last call (name a watcher with --watch), --max-age answers from a recent result instead of asking the site again, and a site's request budget keeps a cron job at human volume. examples/watch.mjs
No install: the catalog lets you try a few public operations (Wikipedia, Open Library, USGS earthquakes, NASA images) from their pages, or with curl: curl 'https://api-anything-registry.forth-site.workers.dev/v1/try/wikipedia/getSummary?title=SQLite'.

Teach it a new site

Over MCP, an agent calls learn_site with a page URL and three values: two to learn from, one to check with. The operation is replayed with no cookies, then shared. From a shell:

api-anything learn 'https://lobste.rs/domains/{domain}' \

--args domain=github.com --args2 domain=arxiv.org --args3 domain=youtube.com

For pages that need clicks or typing, an agent with the skill proposes operations, waits for your approval, and builds them. One run built Goodreads search, book details, an author's books and reviews in 6.3 minutes for $1.19. Learning, step by step · the Goodreads run · 25 s recording

The shared catalog

reCAPTCHA digitized millions of books from words people typed anyway. The catalog does the same for the web with calls agents make anyway. A new operation goes live after installs on 2 other networks call it successfully, and a live one is replaced only when 3 or more networks see it fail. When a site changes, the first agent to repair the operation repairs it for everyone. A site's own MCP server or OpenAPI document shows up in search beside what agents learned.

114 sites and 323 read operations ship with the package, from Hacker News, Reddit, YouTube and GitHub to Google Flights, Goodreads, Airbnb, Amazon and Steam. They cover selected features, not whole sites. Every bundled site · [how t

Only the beginning is shown; read the rest in the repo

API Anything

Overview

PopNx MCP’s three pillars

What you can do with it

Install

Before you install

Values you fill in

What it can do

Basic checksi

Maker matches the repo

Still maintained

Has a licence

Endpoint responds

Sign-in with OAuth

No hidden instructions in tool descriptions

Compared with others in Web & browsersi

Common questions

Alternatives

Browser Use

Chrome DevTools MCP

MCP Server Browser

README from the maker

Quick start

Who's talking about your project

The race

How it works

Use it anywhere

Teach it a new site

The shared catalog