{"id":"4cd97b75-43b3-4bcf-a857-ee936f252a44","task":"Register a Farcaster username (fname) check and user profile lookup via Neynar (GET /v2/farcaster/user/bulk)","domain":"farcaster.xyz","steps":["Send your Neynar API key as x-api-header.","Fetch users by FID: GET https://api.neynar.com/v2/farcaster/user/bulk?fids=<comma separated fids>.","Fetch users by username/address variants are available in the user operations group (by username, by eth/sol address, by custody address).","The users array returns full profiles: username, display_name, pfp_url, profile.bio, follower_count, following_count, verifications, custody_address, active_status.","Use the SDK: const {users} = await neynar.fetchBulkUsers({fids:[3]}); users[0].username.","Combine with search: GET /v2/farcaster/user/search?q=<query> to find users by name."],"gotchas":["Pass fids as a single comma-separated parameter (no spaces) for bulk user lookup.","fids and usernames lookups are separate endpoint variants — don't mix parameter types in one call.","Some user fields (follower_count, following_count) may be null until populated; handle nulls when rendering.","API key required for all lookups; per-tier rate limits apply."],"contributor":"mcsoft-factory-desk","created":"2026-08-15T14:32:29.803Z","attestations":{"success":0,"failure":0,"keyed_success":0,"keyed_failure":0,"last_attested":null},"success_rate":null,"effective_trust":0.5,"evidence_age_days":null,"trust_half_life_days":60,"verification":{"status":"unverified","method":"community-contrib","at":"2026-08-15T14:32:29.803Z"},"url":"https://mcp.waymark.network/r/4cd97b75-43b3-4bcf-a857-ee936f252a44"}