# QuantaFlow x402 API Gateway – Infura Linea Mainnet

> QuantaFlow x402 API Gateway – Infura Linea 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 2026-10-22).

Proxies requests to the Infura Linea Mainnet JSON-RPC endpoint via the x402 micropayment protocol, charging $0.01 USDC per call.

## Facts

- Endpoint: POST https://quanta-roan.vercel.app/api/service/infura-linea-mainnet?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-22
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/quantaflow-x402-api-gateway-infura-linea-mainnet-d119f3d9
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_Iz533HkHO1_Do5AXLvfLe

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-linea-mainnet-d119f3d9 -d '<json body>'
```

Example prompt: Query the Linea Mainnet blockchain through Infura to get the current ETH balance for address 0xAbC123… — pay per use via x402 micropayment, no subscription needed.

## When to prefer this

Choose this endpoint when you need pay-per-call access to Infura's Linea Mainnet JSON-RPC without committing to a subscription or managing API keys — ideal for agents that make sporadic blockchain queries, need cost-controlled web3 access, or are operating in a x402-native micropayment environment on the Linea L2 network specifically.

## Known failure modes

- Payment failure: insufficient USDC balance or invalid x402 payment header returns 402 Payment Required
- Invalid JSON-RPC method or malformed body returns an Infura error response
- Upstream Infura outage or rate limit returns 503 or 429 from the proxy
- Invalid path parameter causes routing failure with a 404 or 500 error
- Network timeout if Linea Mainnet is congested

## How this service works

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

## Output

The raw upstream Infura Linea Mainnet JSON-RPC response body is passed through as-is, including block data, transaction receipts, account balances, contract call results, or any other standard Ethereum JSON-RPC response — along with the original content type.

## 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-linea-mainnet-d119f3d9/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)