# QuantaFlow x402 Gateway – Infura Mantle Mainnet

> QuantaFlow x402 Gateway – Infura Mantle 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 Infura's Mantle mainnet JSON-RPC endpoint via x402 micropayment protocol, charging $0.01 USDC per call.

## Facts

- Endpoint: POST https://quanta-roan.vercel.app/api/service/infura-mantle-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-gateway-infura-mantle-mainnet-b79816c4
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_om3wyygS_pJzD7fHmC5uD

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-gateway-infura-mantle-mainnet-b79816c4 -d '<json body>'
```

Example prompt: Query the Mantle mainnet via Infura to get the latest block number — use the eth_blockNumber method and forward it through the QuantaFlow gateway.

## When to prefer this

Choose this endpoint when you need pay-per-call access to Infura's Mantle mainnet RPC without managing API keys or subscriptions, and you are already operating in an x402 micropayment context. Ideal for agents making sporadic or low-volume Mantle blockchain queries where a flat subscription is wasteful.

## Known failure modes

- Payment failure: x402 payment not included or insufficient USDC balance causes 402 rejection
- Invalid path: malformed or unsupported RPC path returns upstream error
- Infura quota exceeded: upstream Infura rate limit or node error returns 5xx
- Invalid JSON body: malformed RPC body causes upstream parse error
- Network unavailability: Mantle mainnet congestion or Infura outage returns timeout or 503

## How this service works

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

## Output

The raw upstream JSON-RPC response from Infura's Mantle mainnet node, passed through transparently after the x402 micropayment of $0.01 USDC is verified. Includes standard JSON-RPC fields such as result, id, and jsonrpc version.

## 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-gateway-infura-mantle-mainnet-b79816c4/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)