# ScriptMasterLabs ETH RPC Proxy (x402)

> ScriptMasterLabs ETH RPC Proxy (x402) is a paid API for AI agents from acp-x402-discovery.onrender.com, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-13).

Executes Ethereum JSON-RPC method calls (e.g. eth_blockNumber, eth_getBalance) via a pay-per-call HTTP gateway settled in USDC on Base

## Facts

- Endpoint: GET https://acp-x402-discovery.onrender.com/x402/eth-rpc
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/scriptmasterlabs-eth-rpc-proxy-x402-71e14997
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_0K8KoeGggXKrk0DzZK0AU

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 scriptmasterlabs-eth-rpc-proxy-x402-71e14997
```

Example prompt: What is the current Ethereum block number? Use eth_blockNumber with the latest block tag.

## When to prefer this

Choose this endpoint when you need to make lightweight, pay-per-call Ethereum RPC queries without running your own node or managing an API key subscription. It is ideal for agents that need occasional on-chain lookups (block number, balances, transaction status) and are already operating in the x402 USDC micropayment ecosystem on Base. Prefer alternatives like Infura or Alchemy for high-volume or production workloads.

## Known failure modes

- Invalid or unsupported RPC method name returns an error response
- Missing required 'method' field causes a 400-level validation error
- Invalid address or hash format may return a null result or RPC error
- Payment failure or insufficient USDC balance blocks the call with a 402 response
- Endpoint may be slow or unavailable if the underlying Render.com host is cold-starting

## How this service works

Pay-per-call crypto, RWA, federal, SEC, and compliance APIs. Settled in USDC on Base via x402. Hyphen routes only (e.g. /x402/rwa-aggregates, /x402/gas-tracker).

## Output

Returns a raw Ethereum JSON-RPC response payload for the requested method, including fields such as block number, balance in wei, transaction details, or other on-chain data depending on the method called. The response schema is flexible and mirrors standard Ethereum RPC outputs.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "properties": {
      "hash": {
       "type": "string",
       "example": "0x"
      },
      "block": {
       "type": "string",
       "default": "latest",
       "example": "latest"
      },
      "method": {
       "type": "string",
       "default": "eth_blockNumber",
       "example": "eth_blockNumber"
      },
      "address": {
       "type": "string",
       "example": "0x0000000000000000000000000000000000000000"
      }
     }
    }
   }
  },
  "output": {
   "properties": {
    "example": {}
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "example": {}
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/scriptmasterlabs-eth-rpc-proxy-x402-71e14997/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from acp-x402-discovery.onrender.com](https://www.zero.xyz/host/acp-x402-discovery.onrender.com/llms.txt)