# QuantaFlow x402 API Gateway — Alchemy Ink Mainnet

> QuantaFlow x402 API Gateway — Alchemy Ink 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 2026-10-13).

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

## Facts

- Endpoint: POST https://quanta-roan.vercel.app/api/service/alchemy-ink-mainnet?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/quantaflow-x402-api-gateway-alchemy-ink-mainnet-13aace73
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_4GzRK_0q-UyWUcypLz7Kj

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-ink-mainnet-13aace73 -d '<json body>'
```

Example prompt: Use the QuantaFlow x402 gateway to query the Alchemy Ink mainnet — send a POST to the /v2/eth_blockNumber path and give me the latest block number, paying $0.01 USDC per call.

## When to prefer this

Choose this endpoint when you need pay-as-you-go access to Alchemy's Ink mainnet without a subscription API key, and your agent supports the x402 micropayment protocol. Ideal for low-frequency or cost-sensitive blockchain queries where committing to a paid Alchemy plan is unnecessary.

## Known failure modes

- Insufficient USDC balance or failed x402 payment results in a 402 Payment Required response
- Invalid or malformed path/method results in upstream 4xx errors passed through
- Alchemy Ink mainnet downtime or rate limiting causes 5xx upstream errors
- Malformed JSON body causes upstream parsing errors
- Unsupported RPC method on Ink mainnet returns upstream error payload

## How this service works

Every request, a quantum of value. x402 protocol-based payment endpoint for web3/DeFi tools.

## Output

The raw response body and content type from the upstream Alchemy Ink mainnet API are passed through transparently after the $0.01 USDC x402 payment is settled. The agent receives whatever the upstream endpoint returns — e.g. JSON-RPC results, block data, transaction receipts.

## 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-ink-mainnet-13aace73/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)