{"uid":"cap_RV90GcPYtPsmbq6W4lVMW","slug":"api-web3identity-com-6788680d","name":"Farcaster User Profile Lookup","description":"Get Farcaster user profile by FID, username, or connected address","url":"https://api.web3identity.com/api/farcaster/vitalik","method":"GET","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type"],"properties":{"type":{"type":"string","const":"http"},"method":{"enum":["GET","HEAD","DELETE"],"type":"string"},"queryParams":{"type":"object","properties":{}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object","properties":{"fid":{"type":"number"},"username":{"type":"string"},"followers":{"type":"number"},"displayName":{"type":"string"}}}}}}},"responseSchema":null,"example":{"request":{"input":{"type":"http","method":"GET","queryParams":{}}},"response":{"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"}},"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.02","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"settled","requiresHandshake":false,"reviewCount":0,"rating":{"score":"0.00","successRate":"0.00","reviews":0,"stars":null,"state":"unrated"},"availabilityStatus":"unknown","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.02/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.02","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.02","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_aT5Vu5JoZEbzaNCwAZi6S","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.02","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Retrieves a Farcaster user's profile data including FID, username, display name, and follower count by username, FID, or connected Ethereum address","exampleAgentPrompt":"Can you pull up the Farcaster profile for the username 'vitalik' — I want their FID, display name, and how many followers they have?","exampleUseCases":[{"title":"Verify creator identity for collab deals","prompt":"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."},{"title":"Find influencer FID for campaign tracking","prompt":"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."},{"title":"Resolve wallet to social profile quickly","prompt":"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?"}],"resultDescription":"Returns a JSON object with the user's Farcaster FID (numeric ID), username, display name, and follower count for the requested user identity","failureModes":["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"],"whenToPreferThis":"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.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-14T06:34:10.465Z","isFirstParty":false}