# QuantaFlow SERP Google Search via x402

> QuantaFlow SERP Google Search via x402 is a paid API for AI agents from quanta-roan.vercel.app, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-12).

Performs a Google SERP (Search Engine Results Page) query and returns results, billed at $0.01 USDC per call via the x402 micropayment protocol.

## Facts

- Endpoint: POST https://quanta-roan.vercel.app/api/service/serp-google?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-12
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/quantaflow-serp-google-search-via-x402-869e4d78
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_m3NJlclIkNhOIUlvmU4nX

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-search-via-x402-869e4d78 -d '<json body>'
```

Example prompt: Search Google for 'best open-source LLMs 2024' and give me the top results including titles, URLs, and snippets.

## When to prefer this

Choose this endpoint when you need programmatic access to Google search results with per-query micropayment billing via the x402 protocol, particularly in Web3 or DeFi agent workflows where USDC-based pay-per-use pricing is preferred over subscription-based SERP APIs. Ideal for low-volume or sporadic search needs where a flat subscription would be wasteful.

## Known failure modes

- Payment failure: insufficient USDC balance or x402 payment not accepted, resulting in 402 Payment Required
- Invalid query parameters: malformed query object causing upstream SERP API error
- Rate limiting: too many requests in a short window returning 429
- Upstream SERP API unavailability returning 502 or 503
- Empty results: query returns no matching SERP listings
- Malformed request body causing 400 Bad Request

## How this service works

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

## Output

Returns the upstream Google SERP response body passed through after successful x402 micropayment, typically including organic search result listings with titles, URLs, and snippets, plus any additional SERP features (ads, knowledge panels, etc.) depending on the query.

## 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-search-via-x402-869e4d78/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)