# Alchemy Node JSON-RPC Passthrough

> Alchemy Node JSON-RPC Passthrough is a paid API for AI agents from stablecrypto.dev, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-14).

Executes standard Ethereum JSON-RPC methods against any Alchemy-supported network via a paid passthrough endpoint

## Facts

- Endpoint: POST https://stablecrypto.dev/api/alchemy/node/rpc
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/alchemy-node-json-rpc-passthrough-6c3bfd21
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_4jaXgzElKtCDnxgbmwknv

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 alchemy-node-json-rpc-passthrough-6c3bfd21 -d '<json body>'
```

Example prompt: Call eth_getBalance on eth-mainnet for address 0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045 and tell me the current ETH balance.

## When to prefer this

Use this endpoint when you need to query any standard Ethereum JSON-RPC method across multiple Alchemy-supported networks (Ethereum mainnet, Base, Polygon, etc.) without managing your own Alchemy API key. Ideal for AI agents that need on-chain data reads such as balances, block info, transaction receipts, or contract calls, and can pay per-call via x402/USDC micropayments.

## Known failure modes

- Invalid network slug returns an error indicating unsupported network
- Malformed JSON-RPC method name returns method not found error
- Missing required 'network' or 'method' fields returns HTTP 400 validation error
- Insufficient USDC balance or payment failure returns HTTP 402
- Rate limiting or Alchemy node downtime may return 503 or timeout
- Invalid params array for the given method returns JSON-RPC invalid params error

## How this service works

Pay-per-request access to CoinGecko, DefiLlama, Alchemy, and Etherscan APIs. No auth, no subscriptions.

## Output

Returns the raw JSON-RPC response object from Alchemy's node for the specified network and method, including the result field (e.g. hex-encoded balance, block object, transaction receipt, or contract return data) or an error object if the call fails.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "method": {
   "type": "string",
   "description": "JSON-RPC method (e.g. eth_blockNumber, eth_getBalance)"
  },
  "params": {
   "type": "array",
   "items": {},
   "description": "JSON-RPC params array"
  },
  "network": {
   "type": "string",
   "description": "Alchemy network slug, e.g. eth-mainnet, base-mainnet"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/alchemy-node-json-rpc-passthrough-6c3bfd21/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from stablecrypto.dev](https://www.zero.xyz/host/stablecrypto.dev/llms.txt)