# QuantaFlow Rapid Game Top-Up API Gateway

> QuantaFlow Rapid Game Top-Up 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 2026-10-16).

Proxies requests to a rapid game top-up upstream API via x402 micropayment protocol, charging $0.01 USDC per call

## Facts

- Endpoint: POST https://quanta-roan.vercel.app/api/service/rapid-game-top-up-api?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-rapid-game-top-up-api-gateway-53d56a5c
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_Qe-0QOxSlkN853iIcEt0E

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-game-top-up-api-gateway-53d56a5c -d '<json body>'
```

Example prompt: Top up my game account — use the rapid game top-up service, POST to the top-up path with my account details in the body, and pay the $0.01 USDC fee per request via x402.

## When to prefer this

Choose this endpoint when you need to access a rapid game top-up API using x402 micropayment protocol with USDC stablecoin, particularly in web3-native or DeFi-integrated agent workflows where pay-per-call billing is preferred over subscription models.

## Known failure modes

- Payment failure: insufficient USDC balance causes x402 402 Payment Required error
- Invalid path: incorrect upstream path returns 404 or proxy error
- Malformed body: invalid JSON in body field causes upstream rejection
- Upstream unavailability: game top-up service downtime results in 502/503 passthrough
- Rate limiting: upstream API throttles requests beyond quota

## How this service works

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

## Output

The upstream rapid game top-up API's response body and content type are passed through directly after successful x402 USDC payment processing, confirming the top-up transaction result.

## 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-game-top-up-api-gateway-53d56a5c/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)