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Farcaster User Profile Lookup
x402
Farcaster User Profile Lookup is a paid API for AI agents from api.web3identity.com, paid per call via x402, $0.02/call, status unknown (last checked 2026-09-14).
Retrieves a Farcaster user's profile data including FID, username, display name, and follower count by username, FID, or connected Ethereum address
Price / call$0.02
Success—
StatusUnknown
How this service works
Get Farcaster user profile by FID, username, or connected address
Output
Returns a JSON object with the user's Farcaster FID (numeric ID), username, display name, and follower count for the requested user identity
Example use cases
Verify creator identity for collab deals
“Can you look up the Farcaster account for this Ethereum address and tell me how many followers they have? I want to make sure they're actually a real creator before we discuss a partnership.”
Find influencer FID for campaign tracking
“Pull up the Farcaster profile for the username 'dcfgod' and get me their FID and follower count — I need to track engagement for a marketing campaign.”
Resolve wallet to social profile quickly
“I just have someone's wallet address but need to know their Farcaster username and display name. Can you look that up and tell me if they've got a decent following on the platform?”
Technical details
Endpoint
GEThttps://api.web3identity.com/api/farcaster/vitalikWhen to prefer
Use this endpoint when you need to resolve a Farcaster identity — by username, FID, or connected wallet address — and retrieve profile metadata such as display name and follower count. Prefer this over general ENS or Web3 identity lookups when the target is specifically a Farcaster social profile.
Side effects
- Username or FID not found — returns 404 or empty result
- Invalid or unlinked Ethereum address returns no profile
- Payment of $0.02 USDC not fulfilled — returns HTTP 402
- Rate limiting or quota exceeded — returns 429
- Malformed input identifier causes 400 error
Input
{
"input": {
"type": "http",
"method": "GET",
"queryParams": {}
}
}Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
{
"bio": "",
"fid": 22032,
"avatar": "https://warpcast.com/avatar.png",
"source": "warpcast",
"username": "vitalik",
"verified": false,
"followers": 14,
"following": 172,
"timestamp": "2026-06-13T04:18:44.934Z",
"displayName": "fid: 22032"
}Tags
x402
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