# Free Asset Radar x402 – EVM ETH Call

> Free Asset Radar x402 – EVM ETH Call is a paid API for AI agents from free-asset-radar-x402.besenok2018.workers.dev, paid per call via x402, $0.003/call, status unknown (last checked 2026-10-01).

Executes a read-only eth_call on an EVM-compatible network (defaulting to Base) and returns the raw hex result, billed via x402 micropayment at $0.003 USDC per call.

## Facts

- Endpoint: GET https://free-asset-radar-x402.besenok2018.workers.dev/api/x402/evm-eth-call?utm_source=zero.xyz
- Price: $0.003/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-01
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/free-asset-radar-x402-evm-eth-call-6a4bbfef
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_UKa5qD908468l77iIs5tz

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 free-asset-radar-x402-evm-eth-call-6a4bbfef
```

Example prompt: Run a read-only eth_call on the Base network for the contract at 0xAbCd...1234 with calldata 0xa9059cbb000... and give me the raw hex result.

## When to prefer this

Choose this endpoint when you need a quick, stateless, pay-per-call eth_call on Base or EVM-compatible chains without managing your own RPC node or API keys. Ideal for lightweight agents that need occasional on-chain reads billed via x402 micropayments at $0.003 USDC, especially when avoiding subscription RPC providers like Alchemy or Infura.

## Known failure modes

- Invalid or malformed calldata returns an EVM revert or execution error
- Contract address does not exist on the specified network returns empty result or error
- Network identifier not supported returns a 400 or error response
- Payment not processed (x402 flow failure) returns 402 Payment Required
- Cloudflare Worker timeout on slow RPC response returns 504

## How this service works

Stable edge-hosted x402 utilities for autonomous agents.

## Output

A JSON object containing 'result' (the raw hex-encoded return value from the contract call) and 'network' (the chain used, e.g. 'base'). No state is modified — this is strictly a read operation.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "required": {
   "type": "string"
  },
  "properties": {
   "type": "string"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "result": "0x...",
  "network": "base"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/free-asset-radar-x402-evm-eth-call-6a4bbfef/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from free-asset-radar-x402.besenok2018.workers.dev](https://www.zero.xyz/host/free-asset-radar-x402.besenok2018.workers.dev/llms.txt)