# Suverse Gutenberg Books Search

> Suverse Gutenberg Books Search is a paid API for AI agents from proxy.suverse.io, paid per call via x402, $0.05/call, status unknown (last checked 2026-09-16).

Search Project Gutenberg's public-domain ebook catalog via Gutendex and return book metadata including titles, authors, subjects, and download links — no API key required.

## Facts

- Endpoint: POST https://proxy.suverse.io/v1/data/suverse-gutenberg-books
- Price: $0.05/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-16
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/suverse-gutenberg-books-search-399be9e8
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_N3voC6IDMqPrAuLRYkU97

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 suverse-gutenberg-books-search-399be9e8 -d '<json body>'
```

Example prompt: Can you search Project Gutenberg for free public-domain ebooks about stoicism and give me the titles, authors, and download links?

## When to prefer this

Use this endpoint when you need free, full-text, public-domain literature without any API key or authentication overhead. It is ideal for AI agents that need to source classic texts, build reading lists, or feed literary content into downstream pipelines. Prefer this over scraping Gutenberg directly or using paid ebook APIs when cost-free public-domain content is sufficient.

## Known failure modes

- Empty result set if the search query matches no books in the Gutenberg catalog
- Timeout or upstream error if the Gutendex API is temporarily unavailable
- Malformed or missing body fields causing a 400-level error
- Ambiguous queries returning unrelated results due to keyword overlap

## How this service works

Search free public-domain ebooks from Project Gutenberg via Gutendex, no key. Returns books with title, authors, subjects, and download links. For AI agents sourcing free full-text literature.

## Output

A list of matching books from Project Gutenberg, each including the book's title, author name(s), subjects/genres, languages, copyright status, and direct download links in various formats (plain text, HTML, ePub, etc.).

## 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",
    "bodyType",
    "body"
   ],
   "properties": {
    "body": {
     "properties": {}
    },
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "POST",
      "PUT",
      "PATCH"
     ],
     "type": "string"
    },
    "bodyType": {
     "enum": [
      "json",
      "form-data",
      "text"
     ],
     "type": "string"
    }
   },
   "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/suverse-gutenberg-books-search-399be9e8/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from proxy.suverse.io](https://www.zero.xyz/host/proxy.suverse.io/llms.txt)