# QuantaFlow x402 API Gateway – Alchemy Sui Mainnet

> QuantaFlow x402 API Gateway – Alchemy Sui 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 2026-10-15).

Proxies paid API requests to the Alchemy Sui mainnet RPC/API endpoint using the x402 micropayment protocol, charging $0.01 USDC per call.

## Facts

- Endpoint: POST https://quanta-roan.vercel.app/api/service/alchemy-sui-mainnet?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/quantaflow-x402-api-gateway-alchemy-sui-mainnet-a2cf42ad
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_7kJZ9u-nX44Pc6clJroob

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-alchemy-sui-mainnet-a2cf42ad -d '<json body>'
```

Example prompt: Use the Alchemy Sui mainnet gateway to fetch the current balance for Sui address 0xabc123... — route it as a GET to /v2/balances with that address as a query param.

## When to prefer this

Choose this endpoint when you need pay-per-call access to Alchemy's Sui mainnet API without managing a long-term Alchemy subscription or API key — ideal for agents that make infrequent or variable-volume Sui blockchain queries and want to pay only for what they use via x402 USDC micropayments.

## Known failure modes

- Payment failure: insufficient USDC balance causes 402 Payment Required before the request is forwarded
- Invalid path: unrecognized upstream path returns an error from Alchemy or a gateway 404
- Malformed body: invalid JSON in the body field causes upstream RPC errors
- Alchemy upstream downtime: gateway may return 502/503 if Alchemy Sui mainnet is unavailable
- Rate limiting: high call frequency may trigger upstream throttling from Alchemy

## 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 from the Alchemy Sui mainnet API, passed through transparently after the x402 micropayment is settled. The content type mirrors whatever Alchemy returns (typically JSON with blockchain data such as balances, transactions, objects, or RPC results).

## 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-alchemy-sui-mainnet-a2cf42ad/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)