# free-books-science-fiction

> free-books-science-fiction 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 science fiction books from Project Gutenberg and Internet Archive, ranked by relevance and popularity, with download links.

## Facts

- Endpoint: GET https://intel.rallylive.ca/library/subject/science-fiction
- 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-science-fiction-018989e0
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_NDPHKyxWBL52iY9audq0I

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-science-fiction-018989e0
```

Example prompt: Can you pull up a list of free public-domain science fiction books I can download, maybe filtering by H.G. Wells if possible?

## When to prefer this

Choose this endpoint when you need to discover or link to free, legally downloadable science fiction ebooks in public domain, especially when you want ranked results by popularity and multiple format options (epub/txt/html). It is better suited than a general web search when you specifically need Project Gutenberg / Internet Archive catalogue data with verified download links.

## Known failure modes

- No results returned if search keywords are too restrictive or misspelled
- Pagination beyond available results returns empty page
- Temporary unavailability of upstream Project Gutenberg or Internet Archive data may cause stale or missing entries
- Invalid query parameters may return an error response

## How this service works

Free public-domain books on "Science fiction": browse the catalogue's works tagged with that Library of Congress subject (3,342 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 page of up to 20 science fiction book records, each including title, author, relevance/popularity ranking, and direct download links in epub, txt, and/or html formats. Data is sourced from Project Gutenberg (3,342+ titles) and Internet Archive scans, 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-books-science-fiction-018989e0/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)