# Swift Bot Labs ENS Resolver

> Swift Bot Labs ENS Resolver is a paid API for AI agents from x402-toolbox.swiftbotlab.workers.dev, paid per call via x402, $0.005/call, status unknown (last checked 2026-10-31).

Resolves an ENS name to its Ethereum address and metadata, or reverse-resolves an Ethereum address to its ENS name, paying per call in USDC via x402.

## Facts

- Endpoint: GET https://x402-toolbox.swiftbotlab.workers.dev/v1/evm/ens?utm_source=zero.xyz
- Price: $0.005/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-31
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/swift-bot-labs-ens-resolver-7eafc997
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_TRROj7LhuYZsqwzTSV9YC

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 swift-bot-labs-ens-resolver-7eafc997
```

Example prompt: What Ethereum address does vitalik.eth resolve to? Also give me its namehash and which resolver contract it's using.

## When to prefer this

Use this endpoint when you need a quick, pay-per-call ENS resolution without setting up an account or managing API keys. Ideal for AI agents that need on-demand ENS lookups as part of a larger workflow, especially when already operating in an x402 payment context. Prefer this over ethers.js or viem library calls when you need a simple REST interface without running an Ethereum node or RPC provider.

## Known failure modes

- ENS name not found or unregistered — returns ok:false or empty result
- Invalid ENS name format — may return error or empty response
- Address has no reverse ENS record — reverse resolution returns null name
- Resolver contract unreachable or misconfigured — may return partial data
- x402 payment failure — call blocked before reaching ENS lookup

## How this service works

62 small, deterministic utility APIs (DNS and e-mail checks, web extraction, EVM decoding, x402 checks, IP math, JSON/CSV, hashing, conversions). No account or API key: pay per call in USDC with x402.

## Output

Returns a JSON object with ok status, the ENS name, the resolved Ethereum address (0x hex), the namehash (32-byte hex string used internally by ENS), and the resolver contract address responsible for the mapping.

## 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",
      "HEAD"
     ],
     "type": "string"
    },
    "headers": {
     "type": "object",
     "additionalProperties": {
      "type": "string"
     }
    },
    "queryParams": {
     "type": "object",
     "required": [],
     "properties": {
      "name": {
       "type": "string"
      },
      "address": {
       "type": "string"
      }
     },
     "additionalProperties": false
    },
    "discoverable": {
     "type": "boolean"
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "ok": true,
  "tool": "ens-resolve",
  "result": {
   "name": "vitalik.eth",
   "address": "0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045",
   "namehash": "0xee6c4522aab0003e8d14cd40a6af439055fd2577951148c14b6cea9a53475835",
   "resolver": "0x231b0Ee14048e9dCcD1d247744d114a4EB5E8E63"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/swift-bot-labs-ens-resolver-7eafc997/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402-toolbox.swiftbotlab.workers.dev](https://www.zero.xyz/host/x402-toolbox.swiftbotlab.workers.dev/llms.txt)