# QuantaFlow x402 API Gateway — Alchemy World Chain Mainnet

> QuantaFlow x402 API Gateway — Alchemy World Chain 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 2026-10-17).

Proxies requests to the Alchemy World Chain Mainnet RPC/API through an x402 micropayment-gated gateway at $0.01 USDC per call

## Facts

- Endpoint: POST https://quanta-roan.vercel.app/api/service/alchemy-worldchain-mainnet?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-17
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/quantaflow-x402-api-gateway-alchemy-world-chain-mainnet-4dd0a5e1
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_-eSAPJky9U45gdCK_k7vx

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-world-chain-mainnet-4dd0a5e1 -d '<json body>'
```

Example prompt: Query the World Chain Mainnet via Alchemy — send an eth_getBlockByNumber JSON-RPC call for the latest block on the path /v2 and forward the result back to me.

## When to prefer this

Choose this endpoint when you need pay-per-use, no-subscription access to the Alchemy World Chain Mainnet node and want to pay micropayments in USDC via the x402 protocol rather than managing an Alchemy API key or subscription. Ideal for agents and automation workflows that make sporadic or low-volume World Chain RPC calls and want cost-efficient, permissionless access.

## Known failure modes

- Payment failure: x402 payment not provided or insufficient USDC balance causes request to be rejected before forwarding
- Invalid path: malformed or unrecognized path parameter results in upstream 404 or routing error
- Alchemy upstream error: World Chain Mainnet node returns RPC error (e.g. invalid method, malformed params) passed through as-is
- Rate limiting: Alchemy upstream rate limits triggered if too many requests are sent in rapid succession
- Network timeout: upstream Alchemy node unreachable or slow, resulting in 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 body and content type from the Alchemy World Chain Mainnet node are passed through transparently after the x402 micropayment of $0.01 USDC is verified — including JSON-RPC result objects, error messages, or any other data the Alchemy endpoint returns.

## 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-world-chain-mainnet-4dd0a5e1/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)