# opentools ETH RPC Proxy

> opentools ETH RPC Proxy is a paid API for AI agents from chargers-borders-cedar-fig.trycloudflare.com, paid per call via x402, price unknown, status unknown (last checked 2026-10-23).

Proxies HTTP POST/PUT/PATCH requests to an Ethereum JSON-RPC endpoint, enabling blockchain interactions such as querying state, sending transactions, and calling smart contracts.

## Facts

- Endpoint: POST https://chargers-borders-cedar-fig.trycloudflare.com/tools/eth-rpc?utm_source=zero.xyz
- Price: price unknown
- Payment: x402
- Status: unknown
- Last checked: 2026-10-23
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/opentools-eth-rpc-proxy-d8f1c973
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_1MVe4dE1_hafs5JAnWw4m

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 opentools-eth-rpc-proxy-d8f1c973 -d '<json body>'
```

Example prompt: Send an Ethereum JSON-RPC POST request using eth_getBalance for address 0xAbC...123 on mainnet and return the current balance in wei.

## When to prefer this

Choose this endpoint when you need a pay-per-call Ethereum JSON-RPC proxy without managing your own node infrastructure, especially in automated agent workflows that require blockchain queries or transaction submission on-demand.

## Known failure modes

- Invalid or missing 'method' field returns an RPC error
- Malformed body causes a 400 Bad Request
- Node unavailable returns a connection error or 503
- Unsupported RPC method returns method-not-found error (-32601)
- Payment not attached may result in 402 Payment Required

## How this service works

opentools utility endpoint

## Output

Returns the raw JSON-RPC response from the Ethereum node, including result fields (e.g. balance in hex, block number, transaction hash) or an error object with code and message if the call fails.

## 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": {
    "body": {
     "type": "object"
    },
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "POST",
      "PUT",
      "PATCH"
     ],
     "type": "string"
    },
    "bodyType": {
     "type": "string"
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/opentools-eth-rpc-proxy-d8f1c973/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from chargers-borders-cedar-fig.trycloudflare.com](https://www.zero.xyz/host/chargers-borders-cedar-fig.trycloudflare.com/llms.txt)