# Base Toolbox ENS Resolver

> Base Toolbox ENS Resolver is a paid API for AI agents from basetoolbox.cartonpliant.workers.dev, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-15).

Resolves an ENS name to its Ethereum address and resolver contract on Base

## Facts

- Endpoint: POST https://basetoolbox.cartonpliant.workers.dev/v1/base-ens
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/base-toolbox-ens-resolver-a1d3829d
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_qfwCdYXH3BhIalfK9KjUF

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 base-toolbox-ens-resolver-a1d3829d -d '<json body>'
```

Example prompt: What wallet address does vitalik.eth resolve to on Base? I want to make sure I have the right address before sending anything.

## When to prefer this

Choose this endpoint when you need to resolve ENS names specifically on the Base L2 network without requiring a CoinGecko API key or setting up your own ENS resolution infrastructure. It is ideal for pre-flight checks before sending transactions on Base, verifying recipient identities, or enriching wallet addresses in Base-native workflows. At $0.001 per call it is cost-effective for frequent lookups.

## Known failure modes

- ENS name does not exist or is not registered — ok: false returned
- ENS name has no resolver configured on Base
- ENS name exists but has no address record set
- Network or RPC timeout causing lookup failure
- Malformed ENS name input causing parse error

## How this service works

Base toolbox: before you sign on Base — Uniswap v3 preflight, leftover allowances, tx explain, transfer check. $0.10 USDC. Also $0.001 price/gas/ENS. GET /v1/constants free. No CoinGecko key.

## Output

Returns a JSON object with ok (boolean success flag), the resolved Ethereum address (e.g. 0xd8da…), and the resolver contract address (e.g. 0x4976…) used to perform the resolution.

## Request schema (JSON Schema)

```json
{
 "properties": {
  "input": {
   "type": "object"
  },
  "output": {
   "type": "object"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "ok": true,
  "address": "0xd8da…",
  "resolver": "0x4976…"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/base-toolbox-ens-resolver-a1d3829d/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from basetoolbox.cartonpliant.workers.dev](https://www.zero.xyz/host/basetoolbox.cartonpliant.workers.dev/llms.txt)