# free-books-europe

> free-books-europe is a paid API for AI agents from intel.rallylive.ca, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-14).

Returns a paginated catalogue of free public-domain books tagged with the 'Europe' Library of Congress subject, ranked by relevance and popularity, with direct epub/txt/html download links.

## Facts

- Endpoint: GET https://intel.rallylive.ca/library/subject/europe
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/free-books-europe-0a435f66
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_W4CxACrpWKePkPHCedjfx

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability free-books-europe-0a435f66
```

Example prompt: Can you find me free public-domain books about Europe — ideally something on European history — with download links I can use right away?

## When to prefer this

Choose this endpoint when you need a curated, relevance-ranked catalogue of free public-domain books specifically tagged with the 'Europe' Library of Congress subject, with verified direct download links in multiple formats. Prefer it over raw Project Gutenberg or Internet Archive searches when you want daily-verified links, author/title keyword narrowing, and a consistent paginated JSON response aggregated across both sources.

## Known failure modes

- No results returned if keyword filters are too restrictive
- Payment failure if USDC balance is insufficient (x402 protocol)
- Stale or broken download links if re-verification has not yet run for a given title
- Rate limiting or service unavailability from upstream sources (Project Gutenberg/Internet Archive)

## How this service works

Free public-domain books on "Europe": browse the catalogue's works tagged with that Library of Congress subject (419 in Project Gutenberg alone, plus Internet Archive scans), ranked by relevance and popularity, with direct epub/txt/html download links. Add words to narrow by title or author. Re-verified daily. $0.01 per page of 20.

## Output

A ranked page of up to 20 public-domain book records tagged with the 'Europe' Library of Congress subject, each including title, author, relevance/popularity rank, and direct download links in epub, txt, and/or html formats. Results are re-verified daily and drawn from Project Gutenberg (419+ titles) and Internet Archive.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "properties": {}
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/free-books-europe-0a435f66/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from intel.rallylive.ca](https://www.zero.xyz/host/intel.rallylive.ca/llms.txt)