# QuantaFlow x402 API Gateway – Alchemy Aptos Mainnet

> QuantaFlow x402 API Gateway – Alchemy Aptos 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 2026-10-20).

Proxies requests to Alchemy's Aptos mainnet API node via the x402 micropayment protocol, charging $0.01 USDC per call

## Facts

- Endpoint: POST https://quanta-roan.vercel.app/api/service/alchemy-aptos-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-alchemy-aptos-mainnet-ea90b9a6
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_8JBhwBoB1EP9nmW3nGGmL

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-aptos-mainnet-ea90b9a6 -d '<json body>'
```

Example prompt: Can you fetch the current ledger info from the Aptos mainnet using the Alchemy node — path /v1, GET request, no body needed?

## When to prefer this

Choose this endpoint when you need pay-per-request, no-subscription access to Alchemy's Aptos mainnet RPC node and you are operating in a web3/x402-payment-capable environment. Ideal for agents that make infrequent or bursty Aptos blockchain queries and want to avoid managing API key subscriptions, paying only $0.01 USDC per call via on-chain micropayment.

## Known failure modes

- Payment failure: insufficient USDC balance or x402 protocol error results in 402 Payment Required
- Invalid path: upstream Alchemy returns 404 if the API path does not exist
- Malformed request body: Alchemy returns 400 if the forwarded JSON body is invalid
- Rate limit: Alchemy upstream may return 429 if request volume is too high
- Network timeout: Vercel proxy or Alchemy node may time out on slow queries

## 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 Alchemy's Aptos mainnet API, passed through transparently after successful $0.01 USDC micropayment via x402 protocol — typically JSON containing blockchain state, transaction data, account resources, or ledger information.

## 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-aptos-mainnet-ea90b9a6/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)