# QuantaFlow x402 API Gateway – Infura Polygon Mainnet

> QuantaFlow x402 API Gateway – Infura Polygon Mainnet is a paid API for AI agents from quanta-roan.vercel.app, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-10).

Proxies JSON-RPC and REST requests to Infura's Polygon Mainnet node via a pay-per-call x402 micropayment gateway at $0.01 USDC per request

## Facts

- Endpoint: POST https://quanta-roan.vercel.app/api/service/infura-polygon-mainnet?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-10
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/quantaflow-x402-api-gateway-infura-polygon-mainnet-59913bbd
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_GgczjV-SLrCs5XnzFjeJo

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-infura-polygon-mainnet-59913bbd -d '<json body>'
```

Example prompt: Query the Infura Polygon Mainnet node to get the latest block number — send a eth_blockNumber JSON-RPC call and pay the $0.01 USDC fee per request.

## When to prefer this

Choose this endpoint when you need permissionless, pay-per-call access to Polygon Mainnet blockchain data via Infura without managing an Infura API key subscription. Ideal for low-volume or sporadic Polygon RPC queries where a monthly subscription is overkill, or for autonomous agents that need to self-fund blockchain queries using USDC micropayments via the x402 protocol.

## Known failure modes

- Payment failure: insufficient USDC balance causes 402 Payment Required before the upstream call is made
- Invalid JSON-RPC method or malformed body returns upstream Infura error (e.g. -32601 method not found)
- Incorrect path routing results in a 404 from the gateway
- Rate limiting or Infura quota exhaustion returns a 429 or upstream 503
- Network timeout from Infura returns a 504 or empty response

## How this service works

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

## Output

The raw upstream response from Infura's Polygon Mainnet node is passed through directly — typically a JSON-RPC result object containing blockchain data such as block numbers, balances, transaction receipts, or contract return values, along with the appropriate content-type header.

## 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-infura-polygon-mainnet-59913bbd/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)