# QuantaFlow x402 API Gateway – Infura Sei Mainnet Proxy

> QuantaFlow x402 API Gateway – Infura Sei Mainnet 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 2026-10-20).

Proxies authenticated requests to Infura's Sei mainnet RPC/API endpoint via x402 micropayment protocol, charging $0.01 USDC per call

## Facts

- Endpoint: POST https://quanta-roan.vercel.app/api/service/infura-sei-mainnet?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-20
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/quantaflow-x402-api-gateway-infura-sei-mainnet-proxy-31ac9588
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_gdxJFYf10e3eBxxBu6XXK

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-sei-mainnet-proxy-31ac9588 -d '<json body>'
```

Example prompt: Hit the Infura Sei mainnet RPC and get me the latest block number — use the path '/v3/sei_mainnet' with a GET-style JSON-RPC call for 'eth_blockNumber'.

## When to prefer this

Choose this endpoint when you need pay-per-call access to Infura's Sei mainnet RPC without managing API key subscriptions or long-term commitments. It is ideal for agents that make infrequent or variable-volume blockchain queries and prefer micropayment-based access. It is specifically suited for Sei mainnet data — not Ethereum, Polygon, or other chains. Prefer this over direct Infura subscription when operating in a web3-native, x402-enabled payment context.

## Known failure modes

- Insufficient USDC balance causes payment failure and request rejection before forwarding
- Invalid or malformed path causes upstream 404 or routing error from Infura
- Infura API rate limit or service outage returns upstream 429 or 5xx
- Malformed JSON body causes upstream RPC parse error
- Invalid JSON-RPC method name returns Infura error object
- Sei mainnet node unavailability causes 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 response from Infura's Sei mainnet RPC/API is passed through directly after the x402 micropayment is processed. This includes JSON-RPC response objects containing blockchain data such as block details, account balances, transaction receipts, contract call results, or any other Sei network state, 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-sei-mainnet-proxy-31ac9588/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)