# QuantaFlow SERP Google Play Books Search

> QuantaFlow SERP Google Play Books Search is a paid API for AI agents from quanta-roan.vercel.app, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-16).

Searches Google Play Books via a pay-per-call x402 gateway, returning book search results from the Play Store catalog.

## Facts

- Endpoint: POST https://quanta-roan.vercel.app/api/service/serp-google-play-books?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-16
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/quantaflow-serp-google-play-books-search-b37b1b86
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_Ghp5xUp2s8oAlz6qKQp1a

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 quantaflow-serp-google-play-books-search-b37b1b86 -d '<json body>'
```

Example prompt: Search Google Play Books for 'atomic habits' and show me the top results including prices, authors, and ratings.

## When to prefer this

Use this endpoint when you need to programmatically search the Google Play Books catalog with per-query micropayments via the x402 protocol — ideal for agents that need on-demand book data without a recurring API subscription.

## Known failure modes

- Payment failure via x402 protocol results in 402 response and no data returned
- Invalid or malformed query parameters may return empty results
- Upstream SerpApi service unavailable returns proxy error
- Rate limiting or quota exhaustion on the upstream provider
- Search query returns no matching books (empty result set)

## How this service works

Every request, a quantum of value. x402 protocol-based payment endpoint for web3/DeFi tools.

## Output

Returns upstream SERP data for Google Play Books searches, including book titles, authors, cover images, pricing, ratings, and store URLs as provided by the underlying search results API.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "body": {
   "type": "string",
   "description": "Optional JSON body forwarded to POST requests."
  },
  "path": {
   "type": "string",
   "description": "Path below the selected upstream origin."
  },
  "query": {
   "type": "object"
  },
  "method": {
   "enum": [
    "GET",
    "POST"
   ],
   "type": "string"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "description": "The upstream response body and content type are passed through after successful payment."
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/quantaflow-serp-google-play-books-search-b37b1b86/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from quanta-roan.vercel.app](https://www.zero.xyz/host/quanta-roan.vercel.app/llms.txt)