# x402 Base Tools – Basename Resolver

> x402 Base Tools – Basename Resolver is a paid API for AI agents from wt7tysfcmjm8fpzl.68r.lambda-web.us-east-1.on.aws, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-29).

Resolve a Basename (e.g. jesse.base.eth) to its Ethereum address, or reverse-lookup the primary Basename for a given address on Base.

## Facts

- Endpoint: GET https://wt7tysfcmjm8fpzl.68r.lambda-web.us-east-1.on.aws/v1/basename?utm_source=zero.xyz
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-29
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/x402-base-tools-basename-resolver-cfe27fde
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_OAEALJV3J2oPYp75nKP-R

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 x402-base-tools-basename-resolver-cfe27fde
```

Example prompt: What Ethereum address does jesse.base.eth resolve to on Base?

## When to prefer this

Use this endpoint when you need to resolve Base-specific Basenames (*.base.eth) to addresses or perform reverse lookups on Base addresses. It is purpose-built for the Base L2 naming system, making it more reliable and faster than general ENS resolvers that may not index Base names. Prefer this over generic ENS resolvers when working with Basenames specifically.

## Known failure modes

- Name not registered: returns null or empty address field if the Basename does not exist
- Reverse lookup mismatch: returns no name if the address's primary name does not point back to the address
- Invalid input: malformed address or name format may result in an error response
- Name not yet propagated: recently registered names may not yet be resolvable

## How this service works

Base mainnet data for agents, read live from the chain and paid per call in USDC: gas prices and costs, token prices from Uniswap and Aerodrome pools, balances, token info, transaction decoding, x402 payment checks, EIP-3009 authorization status, Basenames and address profiles. Lookups of things that do not exist are not charged.

## Output

A JSON object containing the resolved Basename (e.g. 'jesse.base.eth') and/or the associated Ethereum address (e.g. '0x2211d1d0020daea8039e46cf1367962070d77da9'). For forward lookups, returns the address; for reverse lookups, returns the Basename only if the name's forward resolution points back to the queried address.

## 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",
     "properties": {
      "name": {
       "type": "string",
       "description": "a Basename such as jesse.base.eth (or jesse)"
      },
      "address": {
       "type": "string",
       "description": "an address, to find its Basename"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "properties": {
      "name": {},
      "address": {}
     }
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "name": "jesse.base.eth",
  "address": "0x2211d1d0020daea8039e46cf1367962070d77da9"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/x402-base-tools-basename-resolver-cfe27fde/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from wt7tysfcmjm8fpzl.68r.lambda-web.us-east-1.on.aws](https://www.zero.xyz/host/wt7tysfcmjm8fpzl.68r.lambda-web.us-east-1.on.aws/llms.txt)