# Free Public-Domain Detective and Mystery Stories Catalogue

> Free Public-Domain Detective and Mystery Stories 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).

Returns a paginated catalogue of free public-domain detective and mystery fiction books from Project Gutenberg and Internet Archive, with epub/txt/html download links, ranked by relevance and popularity.

## Facts

- Endpoint: GET https://intel.rallylive.ca/library/subject/detective-and-mystery-stories
- 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-detective-and-mystery-stories-catalogue-6b68c3a9
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_EwB7zgMH75Z5O0kzgJMC0

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-detective-and-mystery-stories-catalogue-6b68c3a9
```

Example prompt: Can you show me the most popular free public-domain detective and mystery books I can download as epub or txt — maybe filter by 'Conan Doyle' if possible?

## When to prefer this

Choose this endpoint when you need to discover or list free, legally downloadable public-domain detective and mystery fiction with direct file links. It is best when you want curated, relevance-ranked results from Project Gutenberg and Internet Archive without scraping those sites directly. Prefer it over general web search when you need structured book metadata and download URLs rather than web pages.

## Known failure modes

- No results returned if keyword filter matches no titles or authors
- Pagination out of range returns empty result set
- Downstream Project Gutenberg or Internet Archive data temporarily unavailable causing stale or missing results
- Payment failure (x402) if USDC balance is insufficient for the $0.01 per call fee

## How this service works

Free public-domain books on "Detective and mystery stories": browse the catalogue's works tagged with that Library of Congress subject (1,112 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 items per page) of public-domain detective and mystery books, each with title, author, relevance/popularity ranking, and direct download links in epub, txt, and html formats. Data is drawn from Project Gutenberg (1,112+ works) and Internet Archive, 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-detective-and-mystery-stories-catalogue-6b68c3a9/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)