ANYFREEBOOK API v1

Try it

No key needed for the first try — the anonymous tier allows 30 requests a minute. The same call from a terminal is a single curl:

Sources

Twelve live upstreams behind one query. This table is rendered from the same registry the API serves at /api/v1/sources, so it cannot drift away from the code.

GET /search

Searches every open source at once and returns a legal tier for each result.

{
  "query": "python",
  "page": 1,
  "limit": 2,
  "total": 23872467,
  "count": 2,
  "sources": {
    "ANYFREEBOOK": 3,
    "Open Library": 6588,
    "Internet Archive": 23527856,
    "DOAJ": 17392,
    "PubMed Central": 297904,
    "Project Gutenberg": 22537,
    "LibriVox": 0,
    "Google Books": 190
  },
  "failedSources": [],
  "partial": false,
  "results": [
    {
      "id": "ol-OL2784125W",
      "title": "Learning Python",
      "author": "Mark Lutz, David Ascher",
      "year": 1999,
      "source": "Open Library",
      "sourceType": "openlibrary",
      "sourceUrl": "https://openlibrary.org/works/OL2784125W",
      "tier": "borrow",
      "tierReason": "A real Internet Archive copy exists, but it is borrow-only: a free Internet Archive account and a loan are required, so it is not a direct download.",
      "license": "Borrow-only lending copy (Internet Archive)",
      "files": [],
      "links": [
        { "label": "Read on Open Library", "url": "https://openlibrary.org/works/OL2784125W", "source": "Open Library" },
        { "label": "Read on Internet Archive", "url": "https://archive.org/details/einfuhrunginpyth0000lutz", "source": "Internet Archive" }
      ],
      "url": "https://anyfreebook.com/book/learning-python-ol-OL2784125W"
    }
  ],
  "meta": { "apiVersion": "v1", "generatedAt": "2026-10-24T11:45:48.554Z" }
}

failedSources lists the sources that did not answer, and partial is true when it is non-empty. A partial result set is not an empty result set — surface it rather than presenting a short list as everything.

GET /resolve

The authoritative answer for one title. It checks the title and the author against the real record, so a book by one Austen never resolves to a different book that shares the surname — and a request for one title never comes back with a different book attached. When nothing matches, the tier is unverified and the links point at real search pages for that exact title and author.

{
  "title": "Fairy Circles",
  "author": "Villamaria",
  "tier": "download",
  "tierReason": "Open-access copy on the Internet Archive.",
  "sourceType": "archive",
  "sourceUrl": "https://archive.org/details/fairycirclestale00villiala",
  "license": "Public domain",
  "files": [
    { "format": "epub", "url": "https://archive.org/download/fairycirclestale00villiala/fairycirclestale00villiala.epub", "bytes": 15512987, "label": "fairycirclestale00villiala.epub" },
    { "format": "pdf", "url": "https://archive.org/download/fairycirclestale00villiala/fairycirclestale00villiala.pdf", "bytes": 13373257, "label": "fairycirclestale00villiala.pdf" },
    { "format": "txt", "url": "https://archive.org/download/fairycirclestale00villiala/fairycirclestale00villiala_djvu.txt", "bytes": 514307, "label": "fairycirclestale00villiala_djvu.txt" },
    { "format": "html", "url": "https://archive.org/download/fairycirclestale00villiala/fairycirclestale00villiala_hocr.html", "bytes": 11537829, "label": "fairycirclestale00villiala_hocr.html" }
  ],
  "links": [
    { "label": "Read on Internet Archive", "url": "https://archive.org/details/fairycirclestale00villiala", "source": "Internet Archive" },
    { "label": "View on Open Library", "url": "https://openlibrary.org/works/OL7903107W", "source": "Open Library" }
  ],
  "meta": { "apiVersion": "v1", "generatedAt": "2026-10-24T12:53:48.857Z" }
}

A tier of download means the copy is free to read without payment or an account. It does not guarantee a fetchable file: a DOAJ article or a PubMed Central paper is free, but the source exposes no file you can get in one request, so files is empty and the links point at the publisher’s page. Check files.length before you try to fetch.

GET /health

Liveness and version. It touches no upstream, so it stays up even when a source is down.

{ "status": "ok", "apiVersion": "v1", "uptimeSeconds": 1234 }

Authentication

Optional. The anonymous tier works with no setup. A key is sent as a bearer token: Authorization: Bearer afb_.... A key that cannot be verified gets 401 — it is never silently downgraded to the anonymous tier.

Errors

CORS

Closed by default. The allowlist comes from NEXT_PUBLIC_API_ALLOWED_ORIGINS, a comma-separated list of origins. A command-line client or a server-side SDK does not need CORS at all.