# QuantaFlow Rapid Crypto News API (x402)

> QuantaFlow Rapid Crypto News API (x402) is a paid API for AI agents from quanta-roan.vercel.app, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-12).

Fetches rapid cryptocurrency news via a pay-per-request x402 protocol gateway for $0.01 USDC per call

## Facts

- Endpoint: POST https://quanta-roan.vercel.app/api/service/rapid-crypto-news51?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-12
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/quantaflow-rapid-crypto-news-api-x402-6772a699
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_MrHhJ8DlQTqeCYZqitHws

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-crypto-news-api-x402-6772a699 -d '<json body>'
```

Example prompt: Fetch me the latest rapid crypto news — I want current headlines and updates from the cryptocurrency market right now.

## When to prefer this

Choose this endpoint when you need pay-per-use cryptocurrency news retrieval without a subscription, particularly in Web3/DeFi agent contexts that already handle x402 micropayments in USDC. It is ideal for low-frequency news polling where a $0.01 per-call cost model is acceptable and you want to avoid API key management overhead.

## Known failure modes

- Payment failure: insufficient USDC balance or x402 payment header missing/malformed results in 402 Payment Required
- Upstream unavailable: the proxied news source is down or rate-limited, returning an error passthrough
- Invalid path or query: malformed path or query parameters may return an upstream 404 or 400 error
- Network timeout: Vercel serverless cold start or upstream latency may cause timeouts
- Schema mismatch: sending unexpected body fields may be silently ignored or cause upstream errors

## How this service works

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

## Output

The upstream API's response body and content type are passed through directly after successful x402 micropayment processing, typically containing cryptocurrency news articles, headlines, or structured news feed data in JSON or similar 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-rapid-crypto-news-api-x402-6772a699/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)