# QuantaFlow CoinStats API Gateway

> QuantaFlow CoinStats 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 2026-09-14).

Proxies requests to the CoinStats cryptocurrency data API via x402 micropayment protocol, charging $0.01 USDC per call.

## Facts

- Endpoint: POST https://quanta-roan.vercel.app/api/service/coinstats
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/quantaflow-coinstats-api-gateway-664b7d99
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_HH9eYgBG6LtJFe5Nzuqsr

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-coinstats-api-gateway-664b7d99 -d '<json body>'
```

Example prompt: Pull the current price, market cap, and 24-hour change for Bitcoin and Ethereum from CoinStats using the QuantaFlow gateway — just hit the /coins path with those two coin IDs.

## When to prefer this

Choose this endpoint when you need real-time cryptocurrency and DeFi market data from CoinStats and want to pay per-call via x402 micropayments in USDC rather than managing a traditional API subscription or API key.

## Known failure modes

- Payment failure or insufficient USDC balance returns 402 Payment Required
- Invalid API path returns upstream 404 from CoinStats
- Malformed query parameters may return upstream validation errors
- CoinStats upstream downtime results in gateway error
- Rate limiting by upstream CoinStats API may cause 429 errors

## How this service works

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

## Output

The raw upstream CoinStats API response body is passed through after successful x402 micropayment verification, including cryptocurrency prices, market caps, volumes, rankings, and other coin statistics in JSON 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-coinstats-api-gateway-664b7d99/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)