# QuantaFlow x402 API Gateway – Alchemy Mantle Mainnet

> QuantaFlow x402 API Gateway – Alchemy 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 2026-09-14).

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

## Facts

- Endpoint: POST https://quanta-roan.vercel.app/api/service/alchemy-mantle-mainnet
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/quantaflow-x402-api-gateway-alchemy-mantle-mainnet-bda10333
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_5KgiNnohkxH_0yOFeby1Z

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-mantle-mainnet-bda10333 -d '<json body>'
```

Example prompt: Fetch the current token balances for wallet address 0xABC123 on Mantle mainnet using Alchemy — I want to see all ERC-20 holdings.

## When to prefer this

Choose this endpoint when you need pay-per-call access to Alchemy's Mantle mainnet APIs without committing to an Alchemy subscription or managing API keys — ideal for agents that make occasional or bursty Mantle blockchain queries and want to pay only for what they use via x402 micropayments.

## Known failure modes

- Payment failure: insufficient USDC balance or x402 payment not accepted — request blocked before forwarding
- Invalid path: upstream Alchemy endpoint path not found, returns 404 from upstream
- Alchemy API error: upstream RPC error or rate limit from Alchemy returned as-is
- Malformed request body: invalid JSON in body field causes upstream rejection
- Network timeout: Mantle mainnet node unresponsive or slow, causing gateway timeout

## 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 Alchemy's Mantle mainnet API is passed through after successful x402 payment verification — including blockchain RPC results, token data, transaction details, or other Alchemy Enhanced API responses in their native JSON format.

## 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-mantle-mainnet-bda10333/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)