# exchangerebel.com Book Metadata Authors

> exchangerebel.com Book Metadata Authors is a paid API for AI agents from exchangerebel.com, paid per call via x402, $0.005/call, status unknown (last checked 2026-10-13).

Retrieves a list of book authors from a book metadata catalog

## Facts

- Endpoint: GET https://exchangerebel.com/toll/books/authors?utm_source=zero.xyz
- Price: $0.005/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/exchangerebel-com-book-metadata-authors-19524ac0
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_CiMk4yDdtK10GxqFnmL37

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 exchangerebel-com-book-metadata-authors-19524ac0
```

Example prompt: Can you pull up the list of book authors from the exchangerebel book metadata catalog?

## When to prefer this

Use this endpoint when you need to enumerate or browse the list of book authors available in the exchangerebel book metadata catalog, especially in a lightweight GET-based lookup. Prefer this over a single-author endpoint when you need multiple authors or a full catalog view.

## Known failure modes

- Missing or invalid query parameters may return an empty result or 400 error
- Service unavailable returns a 5xx error
- No authors match the given filter criteria — returns empty list
- Payment failure or insufficient USDC balance blocks the request via x402 protocol

## How this service works

book-metadata-authors

## Output

Returns a list of book authors from the catalog, likely including author names and associated metadata fields such as IDs or biographical details, formatted as a JSON object.

## 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"
    }
   }
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/exchangerebel-com-book-metadata-authors-19524ac0/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from exchangerebel.com](https://www.zero.xyz/host/exchangerebel.com/llms.txt)