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GlossaryConceptUpdated May 2026

JWT

noun · also: api-key, oauth, secret

What is jwt?

A JWT (JSON Web Token) is a compact, signed token used to prove who you are or what you're allowed to do — common in modern API auth.

Definition

Full definition of jwt

JWTs encode a JSON payload (the "claims" — user_id, scopes, expiry) and sign it cryptographically so the receiver can verify authenticity without calling a database. They look like three base64 strings separated by dots. Many APIs (Auth0, Firebase, Supabase, Clerk) issue JWTs after login; Tiny Command uses them internally to authenticate API requests. You'll occasionally see JWTs in integration setup screens.

In practice

JWT examples

JWT structure
eyJhbGciOi... (header) . eyJzdWIiOi... (payload) . SflKxwRJ... (signature)
Used by

Apps that exemplify jwt

See jwt in action across real integrations.

FAQ

Common questions about jwt

Are JWTs encrypted?
No — they're signed, not encrypted. Anyone can read the payload (base64 decode it). Don't put secrets inside.
What does the 'exp' claim do?
It's a Unix timestamp for token expiration. Receivers should reject expired JWTs.