# Citiview Agent Market: EVM JSON-RPC Gateway

> Citiview Agent Market: EVM JSON-RPC Gateway is a paid API for AI agents from agents.citiviewgroup.com, paid per call via x402, $0.0025/call, status unknown (last checked 2026-10-14).

Provides keyless JSON-RPC read access to EVM-compatible blockchains (Base, Ethereum, Polygon, Arbitrum, Optimism) supporting standard methods like eth_call, eth_getBalance, eth_blockNumber, and eth_getLogs.

## Facts

- Endpoint: GET https://agents.citiviewgroup.com/v1/rpc/:chain?utm_source=zero.xyz
- Price: $0.0025/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/citiview-agent-market-evm-json-rpc-gateway-47bfa0ec
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_PWsLJ-96ABBbchR2wtBjv

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 citiview-agent-market-evm-json-rpc-gateway-47bfa0ec
```

Example prompt: What's the current ETH balance of wallet 0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045 on Ethereum mainnet?

## When to prefer this

Choose this endpoint when you need keyless, pay-per-call JSON-RPC access to multiple EVM chains without managing API keys or subscriptions. Ideal for agents that need occasional on-chain reads across Base, Ethereum, Polygon, Arbitrum, or Optimism at low cost ($0.002 per call) without provisioning infrastructure or signing up for Alchemy/Infura accounts.

## Known failure modes

- Invalid chain name in path returns an error or 404
- Malformed JSON-RPC method name returns a JSON-RPC error response
- Invalid params format causes parsing failure
- eth_sendRawTransaction and write methods are not supported (read-only access)
- Network congestion may cause timeouts on complex eth_call requests
- Payment not fulfilled results in 402 Payment Required response

## How this service works

JSON-RPC read access to EVM chains (base, ethereum, polygon, arbitrum, optimism) with no API key. Send a standard JSON-RPC body (eth_call, eth_getBalance, eth_blockNumber, eth_getLogs). Also callable as GET with the same fields as query parameters.

## Output

A standard JSON-RPC response object containing the 'result' field with the on-chain data (e.g. balance in wei, block number as hex, call return value, or array of log entries), or an 'error' field if the request failed.

## 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": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "pathParams": {
     "type": "object",
     "required": [
      "chain"
     ],
     "properties": {
      "chain": {
       "type": "string",
       "description": "base | ethereum | polygon | arbitrum | optimism"
      }
     }
    },
    "queryParams": {
     "type": "object",
     "required": [
      "method"
     ],
     "properties": {
      "id": {
       "type": "string",
       "description": "JSON"
      },
      "method": {
       "type": "string"
      },
      "params": {
       "type": "string",
       "description": "separate items with |"
      },
      "jsonrpc": {
       "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/citiview-agent-market-evm-json-rpc-gateway-47bfa0ec/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from agents.citiviewgroup.com](https://www.zero.xyz/host/agents.citiviewgroup.com/llms.txt)