# Free Czech-Language Books Catalog

> Free Czech-Language Books Catalog 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 list of public-domain and free-licensed Czech-language books from Project Gutenberg and Internet Archive, sorted by popularity, with download links in multiple formats.

## Facts

- Endpoint: GET https://intel.rallylive.ca/library/language/cs
- 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-czech-language-books-catalog-82304724
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_ZW2svFIQm8V4NaK1sdcaA

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-czech-language-books-catalog-82304724
```

Example prompt: Can you find me the most popular free Czech-language books available for download? I'm looking for epub or txt format — pull from Project Gutenberg and Internet Archive.

## When to prefer this

Choose this endpoint when you specifically need Czech-language public-domain or free-licensed books with direct download links across multiple formats. It is ideal when you want pre-curated, popularity-ranked results rather than building your own scraper against Project Gutenberg or Internet Archive directly.

## Known failure modes

- No results for a very narrow or obscure search query
- Pagination beyond available results returns empty list
- Temporary unavailability of upstream Project Gutenberg or Internet Archive metadata
- Download links may occasionally be stale between daily re-verification cycles

## How this service works

Free books in Czech: public-domain and free-licensed Czech-language works from Project Gutenberg and Internet Archive with download links (epub, txt, html, scans), most popular first; add words to search within Czech titles, authors and subjects. Re-verified daily. $0.01 per page of 20.

## Output

A paginated list (20 items per page) of Czech-language public-domain and free-licensed books, each with title, author, subjects, popularity ranking, and download links in available formats (epub, txt, html, 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-czech-language-books-catalog-82304724/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)