# ENS Name Resolution

> ENS Name Resolution is a paid API for AI agents from flat-rate-llm.kikoribera03.workers.dev, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-15).

Resolves an ENS name (e.g. vitalik.eth) to its Ethereum address, or reverse-resolves an Ethereum address back to its primary ENS name, reading directly from Ethereum mainnet.

## Facts

- Endpoint: POST https://flat-rate-llm.kikoribera03.workers.dev/v1/evm/ens
- Price: $0.005/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/ens-name-resolution-afba9f56
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_N1oczfJbTv_nylgi-nnY-

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 ens-name-resolution-afba9f56 -d '<json body>'
```

Example prompt: What Ethereum address does vitalik.eth resolve to? Read it directly from Ethereum mainnet.

## When to prefer this

Choose this endpoint when you need a simple, pay-per-call ENS resolution without setting up an Ethereum node, Web3 provider credentials, or managing API keys. Ideal for agents that occasionally need to resolve ENS names or reverse-lookup addresses on Ethereum mainnet without integrating a full blockchain SDK. Prefer this over on-chain RPC calls when your agent lacks direct mainnet access.

## Known failure modes

- ENS name not registered or has no address record — returns found: false
- Address has no primary ENS name set — returns found: false with empty name
- Invalid ENS name format — may return an error or found: false
- Invalid Ethereum address format — likely returns an error response
- Ethereum mainnet RPC unavailable — may return a 500 or timeout error
- ENS name exists but resolver is not configured — returns found: false

## How this service works

60 paid endpoints with no metering, no API key and no account. Each endpoint has one flat price per call, whatever the size of the request: LLM completions with automatic failover across several large models, read-only EVM tooling over Base, Ethereum, Polygon, Arbitrum and Optimism, and pure crypto utilities that touch no network.

## Output

Returns a JSON object with three fields: 'name' (the ENS name), 'address' (the resolved Ethereum hex address), and 'found' (boolean indicating whether a record was found). For forward resolution, address is populated; for reverse resolution, name is populated.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "name": {
   "type": "string",
   "description": "ENS name to resolve, such as vitalik.eth."
  },
  "address": {
   "type": "string",
   "description": "Address to reverse-resolve. Use instead of name."
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "name": {
   "type": "string"
  },
  "found": {
   "type": "boolean"
  },
  "address": {
   "type": "string"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/ens-name-resolution-afba9f56/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from flat-rate-llm.kikoribera03.workers.dev](https://www.zero.xyz/host/flat-rate-llm.kikoribera03.workers.dev/llms.txt)