# Basename/ENS Name Resolver (Base)

> Basename/ENS Name Resolver (Base) is a paid API for AI agents from webtools402.176-109-107-191.sslip.io, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-15).

Resolves Basename/ENS names to Ethereum addresses (forward lookup) or resolves addresses back to verified names (reverse lookup with anti-spoofing verification).

## Facts

- Endpoint: GET https://webtools402.176-109-107-191.sslip.io/resolve
- 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/basename-ens-name-resolver-base-9d737170
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_0kB1wRyWYb68aVRaZXfUI

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 basename-ens-name-resolver-base-9d737170
```

Example prompt: What Ethereum address does the Basename 'jesse.base.eth' resolve to? And then do a reverse lookup on that address to confirm it maps back to the same name.

## When to prefer this

Use this endpoint when you need to resolve human-readable Basename or ENS names to Ethereum addresses on Base, or when you need to reverse-lookup a wallet address to its associated name with anti-spoofing verification. Prefer this over general-purpose RPC calls when you want a simple HTTP GET interface with built-in forward-verification of reverse records.

## Known failure modes

- Name not registered or does not exist — returns null or empty result
- Address has no reverse record set — no name returned
- Reverse record exists but fails forward verification (spoofing attempt detected) — result withheld or flagged
- Invalid address format — query parameter rejected
- Network or RPC timeout — transient error response
- Name contains unsupported TLD — not resolvable

## How this service works

Basename/ENS resolution on Base: forward name->address (give 'name') or reverse address->name (give 'address', forward-verified against spoofing).

## Output

Returns the resolved Ethereum address for a given name (forward lookup) or the verified Basename/ENS name for a given address (reverse lookup), with forward-verification to guard against spoofing attacks.

## 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",
      "DELETE"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [],
     "properties": {
      "name": {
       "type": "string",
       "description": "Basename/ENS name to resolve (forward)"
      },
      "address": {
       "type": "string",
       "description": "Address for reverse lookup (->name)"
      }
     }
    }
   },
   "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/basename-ens-name-resolver-base-9d737170/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from webtools402.176-109-107-191.sslip.io](https://www.zero.xyz/host/webtools402.176-109-107-191.sslip.io/llms.txt)