# FastX402 ENS/Basename Name Resolver

> FastX402 ENS/Basename Name Resolver is a paid API for AI agents from fastx402.tools, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-18).

Resolves an ENS name or Basename (e.g. vitalik.eth, jesse.base.eth) to its underlying blockchain address and resolver contract

## Facts

- Endpoint: GET https://fastx402.tools/name-resolve?utm_source=zero.xyz
- Price: $0.002/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-18
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/fastx402-ens-basename-name-resolver-6b892f10
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_oDniz5Tiy_aHHROeaPFl2

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 fastx402-ens-basename-name-resolver-6b892f10
```

Example prompt: Can you resolve jesse.base.eth to its actual wallet address for me?

## When to prefer this

Use this endpoint when you need a fast, no-account-required resolution of ENS (.eth) or Base (.base.eth) names to wallet addresses, especially inside an AI agent workflow where paying $0.002 per call in USDC via x402 is preferable to managing API keys or running your own resolver infrastructure.

## Known failure modes

- Name does not exist or has not been registered — returns an error or empty address
- Name is expired and no longer resolves — may return null address
- Invalid format provided (not a valid ENS or Basename) — request validation error
- Network issues reaching ENS resolver contracts — timeout or 5xx error
- Name resolves to zero address if no address record is set

## How this service works

200 pay-per-call tools for AI agents, from $0.001 per request in USDC on Base or Solana with x402. No account, no API key.

## Output

Returns a JSON object containing the original name, the chain it resolves on (e.g. 'ethereum'), the resolved wallet address (checksummed), and the resolver contract address used to perform the lookup.

## 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"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "name"
     ],
     "properties": {
      "name": {
       "type": "string",
       "description": "ENS name or Basename, e.g. vitalik.eth or jesse.base.eth"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "properties": {
      "name": {
       "type": "string"
      },
      "chain": {
       "type": "string"
      },
      "address": {
       "type": "string"
      },
      "resolver": {
       "type": "string"
      }
     }
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "name": "vitalik.eth",
  "chain": "ethereum",
  "address": "0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045",
  "resolver": "0x231b0ee14048e9dccd1d247744d114a4eb5e8e63"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/fastx402-ens-basename-name-resolver-6b892f10/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from fastx402.tools](https://www.zero.xyz/host/fastx402.tools/llms.txt)