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Jwt Authentication

Checked
pluginagentmarketplace·vlatest·security

Provides JWT guidance and assistance for implementing security and authentication.

Repository

Install on your platform

Showing Claude Code. One command installs this skill into any of the agents below.

  1. 1

    Run this in your project

    terminal
    $ npx skills add pluginagentmarketplace/custom-plugin-nodejs --skill jwt-authentication -a claude-code

  2. Uses the open-source skills CLI and needs Node.js. Add -g to install it for your user instead of this project.

What we know about this skill

Publisher

pluginagentmarketplace

Taken from the source listing. We haven't verified who controls this account.

Install target

Live repository

Not pinned. Installing fetches whatever the repository holds at the time you run the command.

No human has reviewed this code. The checks below are a static scan of the files at one commit — nobody has run this skill or judged whether it works. A skill runs with whatever access you give your agent, so read the source before you install it.

Automated safety checks

scanned

This skill passed all 6 checks. We read its files at one commit and looked for the things that make a skill dangerous to run — not for whether it works.

  • Declares what it does: passed

    SKILL.md parses and declares a name and a description.

    SKILL.md exists, its frontmatter parses, and it declares a name and a description.

  • No undeclared network calls: passed

    Makes no network calls.

    Every host the skill dials — from its scripts, its config endpoints or the commands it tells the agent to run — is either well-known package and API infrastructure or declared in its own frontmatter. Links in documentation are not counted.

  • No obfuscated payloads: passed

    No encoded or obfuscated payloads.

    No base64, hex or compressed blob is decoded and then executed, and no encoded shell commands.

  • No credential access: passed

    Reads no keys, tokens, keychains or credential files.

    Neither the code nor the SKILL.md instructions read SSH keys, cloud credentials, keychains, token stores, browser cookie databases or dotfiles that hold secrets.

  • No pipe-to-shell installers: passed

    No pipe-to-shell or download-and-run installers.

    No `curl … | sh` pattern, in the code or in the instructions, that runs code fetched at run time.

  • Pinned to a commit: passed

    Scanned pluginagentmarketplace/custom-plugin-nodejs at adbdacbf26.

    The exact upstream commit SHA that was scanned is recorded, so the result refers to specific bytes.

Commit
adbdacbf26
Manifest
skills/jwt-authentication/SKILL.md
Scanned
4 files, 311 lines
This is a static scan, not a review. It reads the skill's files; it does not run them, and it cannot tell you whether the skill is any good or whether the code does what its description says. A skill runs with whatever access you give your agent.
What each check looks for →

About this skill

The jwt-authentication skill enables AI agents to securely authenticate requests using JSON Web Tokens (JWT) within Node.js environments. It handles the full lifecycle of token management, including generation, validation, and secure storage for API access control.

When to use it

  • Securing RESTful APIs that require stateless authentication between clients and servers.
  • Implementing role-based access control where user permissions are embedded in token claims.
  • Protecting sensitive endpoints in Node.js applications from unauthorized access attempts.
  • Managing session persistence without relying on server-side cookies for every request.

Key capabilities

  • Generates cryptographically signed JWTs using configurable secret keys or public/private key pairs.
  • Validates incoming tokens to ensure they are unexpired, issued by a trusted authority, and not tampered with.
  • Extracts specific claims (such as user ID or roles) from verified tokens for downstream logic.
  • Integrates seamlessly with standard Node.js HTTP frameworks to intercept and verify requests automatically.

Example prompts

  • "Set up JWT authentication for my Express API endpoint that protects the /admin route."
  • "Generate a secure access token for a user with 'editor' permissions and store it in the database."
  • "Validate the incoming request header to ensure the provided JWT is valid before processing the data update."

Tips & gotchas

Ensure you use a strong, unpredictable secret key or asymmetric key pair; weak secrets render tokens vulnerable to forgery. Always validate token expiration dates and issuer claims to prevent replay attacks or unauthorized access from stolen tokens.