Need to hash a file, decode a JWT, or generate a UUID mid-conversation without leaving Claude? This stateless server gives you five cryptographic utilities as tool calls: hash (multiple algorithms), encode/decode (base64, hex, URL), JWT decoding, and UUID generation. It's built for when you're prototyping auth flows, debugging tokens, or need deterministic hashing without spinning up a separate script. Free tier gives you 500 calls per IP daily, no authentication required, and the provider commits to never logging your inputs. Runs on Cloudflare Workers at the endpoint above.