# Free British-Subject Public Domain Books Catalogue

> Free British-Subject Public Domain Books Catalogue 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).

Browse and retrieve a ranked, paginated catalogue of free public-domain books tagged with the Library of Congress 'British' subject, with epub/txt/html download links.

## Facts

- Endpoint: GET https://intel.rallylive.ca/library/subject/british
- 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-british-subject-public-domain-books-catalogue-70094934
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_31opul39Ytfp74QZoz_s0

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-british-subject-public-domain-books-catalogue-70094934
```

Example prompt: Can you pull up a catalogue of free public-domain books tagged as 'British' — I'm looking for classic British novels I can download as epub or txt?

## When to prefer this

Choose this endpoint when you need a curated, ranked, and daily-verified catalogue of free British-subject public-domain books with direct download links, especially when drawing from both Project Gutenberg and Internet Archive simultaneously. Prefer it over generic web search when you need structured metadata (author, title, format links) and relevance ranking rather than raw search results.

## Known failure modes

- No results returned if keyword filters are too restrictive
- Payment not processed or x402 micropayment fails, blocking access
- Stale or broken download links for older Internet Archive scans
- Rate limiting if too many pages are requested in rapid succession

## How this service works

Free public-domain books on "British": browse the catalogue's works tagged with that Library of Congress subject (370 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, paginated list of up to 20 public-domain books per page tagged with the Library of Congress 'British' subject, including titles, authors, relevance/popularity scores, and direct download links in epub, txt, and html formats. Data is re-verified daily.

## 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-british-subject-public-domain-books-catalogue-70094934/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)