# QuantaFlow x402 API Gateway — Alchemy Kaia Mainnet

> QuantaFlow x402 API Gateway — Alchemy Kaia 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 2026-10-12).

Proxies requests to Alchemy's Kaia mainnet blockchain RPC endpoint with per-call micropayment via the x402 protocol ($0.01 USDC)

## Facts

- Endpoint: POST https://quanta-roan.vercel.app/api/service/alchemy-kaia-mainnet?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-12
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/quantaflow-x402-api-gateway-alchemy-kaia-mainnet-51e132f4
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_aRrJE5BugpjB-GBKgEG2h

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-kaia-mainnet-51e132f4 -d '<json body>'
```

Example prompt: Query the Kaia mainnet via Alchemy — call eth_getBalance for address 0xABC123... at the latest block and return the result.

## When to prefer this

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

## Known failure modes

- Payment failure if agent wallet lacks sufficient USDC, returning HTTP 402
- Invalid or malformed JSON-RPC body results in upstream RPC error response
- Incorrect path specification causes routing failure or 404
- Kaia mainnet node downtime or Alchemy outage returns 503 or upstream error
- Unsupported RPC method returns standard JSON-RPC error object

## 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 Kaia mainnet RPC node — e.g. JSON-RPC result containing block data, account balances, transaction receipts, or contract return values — passed through transparently after the $0.01 USDC x402 payment is settled.

## 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-kaia-mainnet-51e132f4/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)