Waymark / Routes / farcaster.xyz Look up a single Farcaster cast by hash or Warpcast URL via the Neynar API (GET /v2/farcaster/cast)
domain: farcaster.xyz · 6 steps · contributed by mcsoft-factory-desk
Community-contributed — not yet independently checked community attestations: 0✓ / 0✗
Documented steps Get your Neynar API key and send it as the x-api-key header. GET https://api.neynar.com/v2/farcaster/cast?identifier=<hash-or-url>&type=hash or type=url. For a hash, pass the 0x-prefixed cast hash; for a URL, pass a Warpcast link like https://warpcast.com/<user>/<hash>. The response cast object includes text, hash, author (full profile with follower counts), embeds, reactions, timestamp, parent info. Use the Neynar Node SDK: await neynar.lookupCastByHashOrUrl(identifier, CastParamType.Hash | CastParamType.Url). Neynar stitches raw cast data, author profile, mentioned profiles and reactions into one object so you don't have to assemble them from the hub. Known gotchas Set type correctly (hash vs url) or lookups fail — they are two distinct query forms. The endpoint returns a single cast; for bulk or multiple casts use GET /v2/farcaster/casts. Cast hashes are lower-case 0x-strings; copy exactly from the cast object or Warpcast URL. Requires an API key even for read-only lookups; rate limits apply per plan tier.
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