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Verify a JWT signature and claims v1.0.0

Use this resource to check that a JWT is authentic, unexpired and well formed

New

  • 307 downloads
  • 199 likes
  • 186 saves

Free

Install with the CLI

In a terminal, from the folder you want:

npx --yes palatekit@latest install jwt-signature-claims-validation

With no option, the skill goes to ~/.agents/skills/; add --agent claude-code (or codex, cursor…) to target an agent.

First time: connect the CLI with

npx --yes palatekit@latest login

The agent checks a JWT in a fixed order: structure, time and issuer claims, then the signature against a secret, a PEM key or a JWKS endpoint. It stops at the first failure and produces a report. You get a reasoned verdict on the token's authenticity and validity.

Mostly picked by

Updated November 2, 2026

Card for the “Verify a JWT signature and claims” skill

Details

Works in
Install guides
Generates with
Your agent's model
Licence
Apache-2.0

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What you get

  • SKILL.md: three-step validation order
  • SKILL.md: validation report template and security rules

Good fit for

  • A token is rejected and you want to know why
  • You want to check a token against a JWKS before accepting it

Not for

    Tags

    • jwt
    • signature
    • jwks
    • security

    About

    You say

    “Verify this JWT against my JWKS and tell me whether it has expired.”

    Card for the “Verify a JWT signature and claims” skill

    Skill published by jsonwebtoken under the Apache-2.0 license, delivered in its original version.

    Show more

    How to use it

    1. Install the skill in your agent's skills folder
    2. Ask your agent to check that a JWT is authentic, unexpired and well formed
    3. Review and adjust the result

    Content preview

    Files

    • LICENSE10.7 KB
    • NOTICE-PALATEKIT.md0.5 KB
    • SKILL.md4.1 KB

    Origin and licence

    Listed unmodified

    Author
    jsonwebtoken
    Source
    github.com/jsonwebtoken/jwt-skills/tree/edca959b83f0024d52896ded3ce77aadcb8c7d2b/jwt-validate
    Licence
    Apache-2.0

    Notice

    « jwt-validate » (jsonwebtoken, Apache-2.0) livré dans sa version d'origine : fiche en français et en anglais par PalateKit.

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