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Farcaster Profile Lookup by Username or FID
x402
Farcaster Profile Lookup by Username or FID is a paid API for AI agents from agent402.tools, paid per call via x402, $0.002/call, status unknown (last checked 2026-09-14).
Looks up a Farcaster user profile by username or numeric FID, returning identity metadata including bio, follower counts, and Warpcast URL.
Price / call$0.002
Success—
StatusUnknown
How this service works
Lookup a Farcaster profile by username or FID. Returns FID, username, display name, bio, profile picture URL, follower/following counts, and the canonical Warpcast URL. Use to label cast authors, validate a Farcaster handle, or fetch a profile for display.
Output
Returns a structured object containing the user's FID, username, display name, bio text, profile picture URL, follower count, following count, and the canonical Warpcast profile URL.
Example use cases
Example prompt
“Can you pull up the Farcaster profile for the username 'dwr.eth' — I want to see their display name, bio, follower count, and profile picture?”
Technical details
Endpoint
POSThttps://agent402.tools/api/farcaster-profileWhen to prefer
Use this endpoint when you need to resolve a Farcaster username or FID to a full profile record, enrich cast or event data with author identity, validate whether a Farcaster handle exists, or display human-readable profile info from a known identifier. Prefer this over generic social lookup tools when specifically working within the Farcaster/Warpcast ecosystem.
Side effects
- Username or FID not found — returns error indicating no matching profile
- Neither fid nor username provided — returns validation error requiring at least one identifier
- Invalid FID type (non-integer) — returns schema validation error
- Network or upstream Farcaster hub unavailability — returns timeout or 5xx error
- Rate limiting — returns 429 if call quota exceeded
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| fid | number | Farcaster ID (integer; one of fid/username required). |
| username | string | Farcaster handle, with or without leading @ (one of fid/username required). |
Output
Schema · Response
{
"type": "json",
"example": {
"bio": "Working on Farcaster.",
"fid": 3,
"pfpUrl": "https://...",
"source": "neynar",
"username": "dwr",
"venueUrl": "https://warpcast.com/dwr",
"powerBadge": true,
"displayName": "Dan Romero",
"followerCount": 500000,
"followingCount": 1000,
"activeOnFcNetwork": true
}
}Tags
x402
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