AI engineering glossary · Web APIs HTTP
What is JWT?
JWT (also called JSON Web Token): A JSON Web Token is a compact signed string with three dot-separated parts: a header, a payload of claims and a signature. A server can verify it without a database lookup, so it is widely used as a bearer token, though its payload is readable by anyone.
JWT: an example
eyJhbGci....eyJzdWIiOiI0MiJ9....SflKxw carries a payload such as {"sub": "42", "exp": 1750000000}.
Related terms
More Web APIs HTTP terms
Where you learn it
JWT is part of the AI Engineering Program, which teaches it with notes, a hands-on lab and an exam. The first lesson is free.