# Free Public-Domain Books on Islands (Project Gutenberg + Internet Archive)

> Free Public-Domain Books on Islands (Project Gutenberg + Internet Archive) 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 ranked, paginated catalogue of free public-domain books tagged with the Library of Congress 'Islands' subject, with direct epub/txt/html download links, re-verified daily.

## Facts

- Endpoint: GET https://intel.rallylive.ca/library/subject/islands
- 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-islands-project-gutenberg-internet-archive-5a139b84
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_HluL5qp6aCq_-9nXzic6G

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-islands-project-gutenberg-internet-archive-5a139b84
```

Example prompt: Can you find me a list of free public-domain books about islands — things like island survival, island geography, or classic island adventure stories — with download links I can use right away?

## When to prefer this

Choose this endpoint when you need a curated, daily-verified catalogue of free public-domain books specifically tagged with the 'Islands' Library of Congress subject, with direct download links across multiple formats. Prefer it over generic web search when you want structured bibliographic results with ranked relevance and popularity, and when zero cost per book (only $0.01/page) matters.

## Known failure modes

- No results returned if keyword filter is too narrow or misspelled
- Stale download links if a source removes a title between daily re-verification cycles
- Pagination errors if page parameter exceeds available results
- Rate limiting or payment failure if USDC payment of $0.01 per call is not processed

## How this service works

Free public-domain books on "Islands": browse the catalogue's works tagged with that Library of Congress subject (190 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 page of up to 20 ranked book records, each including title, author, Library of Congress subject tags, relevance/popularity scores, and direct download links in epub, txt, and/or html formats, 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-islands-project-gutenberg-internet-archive-5a139b84/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)