# httpay.xyz Alchemy Blockchain API Gateway

> httpay.xyz Alchemy Blockchain API Gateway is a paid API for AI agents from httpay.xyz, paid per call via x402, $0.002/call, status unknown (last checked 2026-09-14).

Proxies requests to the Alchemy blockchain API, routing any Alchemy endpoint via httpay.xyz with the API key injected server-side, paid per call via x402.

## Facts

- Endpoint: POST https://httpay.xyz/api/gateway/alchemy/%7B*path%7D/*
- Price: $0.002/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/httpay-xyz-455a1464
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_RwmdUoND-mIuYIyLxuT6v

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 httpay-xyz-455a1464 -d '<json body>'
```

Example prompt: Use the Alchemy API gateway to call eth_getBalance for address 0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045 on Ethereum mainnet and tell me the current balance in ETH.

## When to prefer this

Choose this endpoint when you need to call any Alchemy blockchain API without provisioning your own Alchemy API key or subscription — ideal for agents making occasional or unpredictable Alchemy calls on a pay-per-use basis via x402 micropayments, especially on Base or Ethereum.

## Known failure modes

- Invalid or unsupported Alchemy path returns 404 or passthrough error
- Payment not processed (x402 flow fails) — request is rejected before reaching Alchemy
- Alchemy-side errors (rate limits, invalid params) returned as-is from upstream
- Malformed request body causes Alchemy to return a JSON-RPC error
- Network not supported by the Alchemy path provided

## How this service works

API Gateway: Alchemy blockchain API (key in path)

## Output

The raw Alchemy API JSON response for the requested path and method — including blockchain state, balances, NFT data, transaction info, or any other Alchemy endpoint output, identical to calling Alchemy directly.

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/httpay-xyz-455a1464/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from httpay.xyz](https://www.zero.xyz/host/httpay.xyz/llms.txt)