# QuantaFlow Rapid X Checker - x402 API Gateway

> QuantaFlow Rapid X Checker - x402 API Gateway 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 a rapid X (Twitter/social) checker tool via x402 micropayment protocol, charging $0.01 USDC per call

## Facts

- Endpoint: POST https://quanta-roan.vercel.app/api/service/rapid-x-checker?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-rapid-x-checker-x402-api-gateway-ef55c0ed
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_AwyLXLZqKcJ7LivF_O-ip

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-rapid-x-checker-x402-api-gateway-ef55c0ed -d '<json body>'
```

Example prompt: Check the X account @elonmusk using the QuantaFlow rapid X checker — look up the profile info and return whatever the checker finds.

## When to prefer this

Choose this endpoint when you need pay-per-query access to X (Twitter) account or post checking functionality without a subscription, especially in web3/DeFi agent contexts that already support the x402 micropayment protocol. Prefer it over direct Twitter API calls when you lack Twitter API credentials but have USDC available on-chain.

## Known failure modes

- Payment failure — insufficient USDC balance or wallet not configured for x402 protocol
- Upstream checker unavailable — the proxied rapid-x-checker service is down or unreachable
- Invalid path or query parameters — malformed request forwarded to upstream returns error
- Rate limiting — upstream X checker imposes its own rate limits independent of payment
- X handle not found — queried account or post does not exist on the platform

## How this service works

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

## Output

The raw upstream response body from the rapid X checker service, passed through after successful x402 micropayment ($0.01 USDC). Content type mirrors whatever the upstream checker returns, typically JSON with X account or post data.

## 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-rapid-x-checker-x402-api-gateway-ef55c0ed/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)