{"uid":"cap_QaGS3HUxMF8hV3A_xiU2U","slug":"farcaster-reputation-score-9da7a37a","name":"Farcaster Reputation Score","description":"Deterministic Farcaster social-reputation score from zero to one hundred for a fid, username or address. Combines account age, verified wallets, a primary address, username presence, follower floor and cast activity into a score, a band and per-dimension reasons. Anti-sybil and provenance signal for crypto agents. Reputation indicators, not a guarantee.","url":"https://payai.agentstools.dev/farcaster/reputation","method":"GET","headers":{},"bodySchema":{"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","HEAD","DELETE"],"type":"string"},"queryParams":{"type":"object","required":[],"properties":{"fid":{"type":"integer","minimum":1,"description":"Farcaster ID (FID), a positive integer"},"address":{"type":"string","description":"Ethereum address to score via its linked FID"},"username":{"type":"string","description":"Farcaster username, without the at-sign"}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object"}}}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.008","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"probe","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":"$0.008/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.008","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.008","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_AoKqDwSCWv98o1cT1euc4","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.008","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Returns a deterministic 0–100 social-reputation score for a Farcaster account (by FID, username, or Ethereum address), with a band classification and per-dimension breakdown for anti-sybil and provenance use cases.","exampleAgentPrompt":"What's the Farcaster reputation score for username 'dwr'? I need to know their trust band and which dimensions are dragging down their score before I whitelist them.","exampleUseCases":[{"title":"Airdrop sybil filtering","prompt":"Before we distribute tokens to our airdrop list, run each Ethereum address through the Farcaster reputation check and flag anyone with a score below 40 as likely sybil — I want the band and the per-dimension reasons too."},{"title":"Gated community access control","prompt":"A user is trying to join our token-gated Discord. Their Farcaster username is 'cryptodan' — can you pull their Farcaster reputation score and let me know if they're in the 'high' band or not?"},{"title":"Due diligence on a crypto contact","prompt":"I'm about to co-invest with someone whose Farcaster FID is 8152. Can you give me their reputation score out of 100, the band they fall into, and the main reasons for any deductions?"}],"resultDescription":"Returns a numeric reputation score between 0 and 100, a named band (e.g. low, medium, high), and a set of per-dimension reason strings covering account age, verified wallets, primary address presence, username presence, follower floor, and cast activity. Serves as an anti-sybil and provenance signal — not a guarantee of trustworthiness.","failureModes":["FID not found: account does not exist on Farcaster","Username not found: unregistered or misspelled handle returns an error or null score","Ethereum address not linked to any Farcaster FID: lookup fails with no result","Missing required query parameter (fid, username, or address must be supplied): 400-level error","Rate limit or payment failure via x402 protocol: 402 Payment Required","Ambiguous input if multiple accounts share similar identifiers"],"whenToPreferThis":"Choose this endpoint when you need a deterministic, multi-dimensional social-reputation signal specifically for Farcaster accounts — particularly in crypto agent workflows requiring anti-sybil checks, airdrop gating, or identity provenance verification. It is preferable over generic social-score APIs when the target user is on Farcaster and on-chain wallet verification matters alongside social signals.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-14T19:03:58.404Z","isFirstParty":false}