# QuantaFlow x402 API Gateway — Blockchain.com Proxy

> QuantaFlow x402 API Gateway — Blockchain.com Proxy 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).

Proxies paid requests to Blockchain.com APIs via the x402 micropayment protocol, charging $0.01 USDC per call.

## Facts

- Endpoint: POST https://quanta-roan.vercel.app/api/service/blockchain-com?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-x402-api-gateway-blockchain-com-proxy-f3afe1c4
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_DuZuR1tZFuNUduVOR9Qn0

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-blockchain-com-proxy-f3afe1c4 -d '<json body>'
```

Example prompt: Look up the details for Bitcoin transaction txid abc123 on Blockchain.com — use the x402 gateway at the /stats path and pass the transaction hash as a query param.

## When to prefer this

Choose this endpoint when you need programmatic, pay-per-use access to Blockchain.com's API data (transactions, addresses, blocks) without managing a Blockchain.com API key, and when you are operating in a web3/x402-native payment context where USDC micropayments are preferred over subscription billing.

## Known failure modes

- Payment failure if insufficient USDC balance — x402 402 Payment Required response
- Invalid or unsupported path forwarded to upstream — Blockchain.com 404 or 400 response
- Malformed JSON body — upstream parse error or 400
- Rate limiting by Blockchain.com upstream — 429 response passed through
- Network timeout to upstream — gateway timeout error

## 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 and content-type from Blockchain.com, passed through transparently after the x402 micropayment of $0.01 USDC is processed successfully.

## 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-blockchain-com-proxy-f3afe1c4/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)