# QuantaFlow x402 API Gateway – OopSpam Spam Detection

> QuantaFlow x402 API Gateway – OopSpam Spam Detection is a paid API for AI agents from quanta-roan.vercel.app, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-11).

Proxies requests to the OopSpam spam detection API via the x402 micropayment protocol, charging $0.01 USDC per call.

## Facts

- Endpoint: POST https://quanta-roan.vercel.app/api/service/rapid-oopspam?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-11
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/quantaflow-x402-api-gateway-oopspam-spam-detection-1fcf8708
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_VDJh0OkDNtwicJlehyMvF

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-x402-api-gateway-oopspam-spam-detection-1fcf8708 -d '<json body>'
```

Example prompt: Check if this comment is spam using the OopSpam service: 'Congratulations! You have been selected to win a $1000 gift card, click here to claim your prize.'

## When to prefer this

Choose this endpoint when you need pay-per-call spam detection without a monthly subscription, want to integrate spam filtering into a web3 or crypto-native workflow using USDC micropayments, or need to access OopSpam capabilities through a decentralized x402 payment protocol rather than a traditional API key.

## Known failure modes

- Insufficient USDC balance causes payment failure and request rejection
- Invalid or malformed JSON body forwarded upstream returns OopSpam API error
- Missing required OopSpam fields (e.g. content, email) cause upstream 400 errors
- Incorrect path parameter results in 404 from upstream OopSpam API
- Network timeout from OopSpam upstream causes proxy to return 502
- x402 payment header missing or malformed returns 402 Payment Required

## How this service works

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

## Output

The raw upstream OopSpam API response passed through after successful x402 micropayment, including spam score, classification verdict, and any additional spam signals detected by OopSpam.

## 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-x402-api-gateway-oopspam-spam-detection-1fcf8708/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)