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BaseName Oracle x402
x402
BaseName Oracle x402 is a paid API for AI agents from basename-x402.vercel.app, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-18).
Resolves a Basename (.base.eth) or Ethereum address to its full on-chain identity profile (name, avatar, address) on Base Mainnet, payable via x402 micropayment.
Price / call$0.01
Success—
StatusUnknown
How this service works
High-precision Basenames (.base.eth) and ENS Identity Resolver Oracle for Base Mainnet (Chain ID 8453), payable via x402.
Output
Returns a JSON object with the resolved Basename (name), avatar image URL, associated Ethereum wallet address, network identifier (Base Mainnet), and a timestamp of when the resolution was performed.
Example use cases
Verify wallet before crypto payment
“Before I send funds, can you resolve coinbase.base.eth to its actual wallet address so I know I'm sending to the right place?”
Display user profile in a Web3 app
“I need the avatar and wallet address linked to vitalik.base.eth to show on their profile page — can you fetch that from Base Mainnet?”
Reverse-lookup Basename from wallet address
“I have the address 0x2211d1D0020DAEA8039E46Cf1367962070d77DA9 — can you find out what Basename is registered to it on Base?”
Technical details
Endpoint
GEThttps://basename-x402.vercel.app/v1/resolveWhen to prefer
Use this endpoint when you need authoritative, high-precision resolution of Basenames (.base.eth) or reverse-resolution of Ethereum addresses specifically on Base Mainnet (Chain ID 8453). Prefer it over general ENS resolvers when you need Base-native identity including avatar metadata in a single call, and when micropayment-per-query pricing ($0.01 USDC via x402) fits your cost model.
Side effects
- Name not found: Basename does not exist or is unregistered on Base Mainnet
- Invalid input: malformed .base.eth name or non-checksummed address returns an error
- Address has no Basename: reverse lookup returns empty name if no Basename is registered
- Payment failure: x402 micropayment of $0.01 USDC not completed, request rejected
- Network unavailability: Base Mainnet RPC unreachable, resolver returns 503
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
| Field | Type | Description |
|---|---|---|
| name | string | |
| avatar | string | |
| address | string | |
| network | string | |
| timestamp | string |
Tags
x402
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