# QuantaFlow SERP Search Index

> QuantaFlow SERP Search Index is a paid API for AI agents from quanta-roan.vercel.app, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-14).

Performs a SERP (Search Engine Results Page) index search query via a pay-per-use x402 protocol gateway at $0.01 USDC per call

## Facts

- Endpoint: POST https://quanta-roan.vercel.app/api/service/serp-search-index?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/quantaflow-serp-search-index-0c1c16bc
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_6MpCVLdJ9Gt2BwSXcfajf

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-search-index-0c1c16bc -d '<json body>'
```

Example prompt: Search the SERP index for 'best DeFi yield farming strategies 2024' and give me the top results — use the QuantaFlow pay-per-call gateway so it bills $0.01 USDC per search.

## When to prefer this

Choose this endpoint when you need programmatic, pay-per-use SERP/search-index lookups billed in USDC via the x402 micropayment protocol — ideal for AI agents operating in web3 or DeFi contexts that already handle crypto payments. Best suited for infrequent, on-demand searches where a $0.01/call cost model is preferable to a subscription. Avoid if you need high-volume bulk search, guaranteed SLA, or fiat billing.

## Known failure modes

- Payment failure: x402 payment not accepted or insufficient USDC balance causes request rejection
- Upstream unavailable: the underlying SERP index service is down or unreachable
- Invalid query parameters: malformed path or query object causes upstream error
- Rate limiting: upstream SERP provider throttles excessive requests
- No results: search query returns empty result set from index
- Schema mismatch: body or query fields incorrectly formatted for upstream service

## How this service works

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

## Output

The upstream SERP search response body is passed through directly after successful payment verification. This typically includes a list of indexed search results, page titles, URLs, and snippets matching the search query. The content type mirrors the upstream provider's response format.

## 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-search-index-0c1c16bc/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)