# Free Public-Domain Books on Orphans

> Free Public-Domain Books on Orphans 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 Library of Congress subject 'Orphans', ranked by relevance and popularity, with direct download links in epub, txt, and html formats.

## Facts

- Endpoint: GET https://intel.rallylive.ca/library/subject/orphans
- 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-public-domain-books-on-orphans-928960fa
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_xUfPZKf7e8Ta0We2pyFwR

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-public-domain-books-on-orphans-928960fa
```

Example prompt: Can you find me a list of free downloadable public-domain books about orphans — maybe narrow it down to classic novels by Charles Dickens if possible?

## When to prefer this

Choose this endpoint when you need a curated, daily-verified catalogue of free public-domain books specifically on the 'Orphans' Library of Congress subject, with direct epub/txt/html download links and popularity-ranked results. Prefer it over generic web search when you want structured bibliographic data from Project Gutenberg and Internet Archive without scraping those sites directly.

## Known failure modes

- No results returned if keyword filter is too restrictive or misspelled
- Empty catalogue page if page number exceeds total available results
- Stale or broken download links if a source repository has changed since the last daily re-verification
- Rate-limit or payment failure if USDC payment is not processed correctly via x402

## How this service works

Free public-domain books on "Orphans": browse the catalogue's works tagged with that Library of Congress subject (458 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 paginated list (20 results per page) of public-domain books tagged with the Library of Congress subject 'Orphans', including book title, author, relevance and popularity rankings, and direct download links in epub, txt, and html formats. Results are sourced from Project Gutenberg and Internet Archive and 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-public-domain-books-on-orphans-928960fa/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)