JWT Decoder — Inspect Claims, Expiry & Algorithm
JWT token decoder API for AI agents. Decode and inspect JSON Web Tokens without verification: extract header (algorithm, type), payload (claims, issuer, audience), expiry timestamp, and signature info. Tools: security_decode_jwt. Use this for debugging authentication flows, inspecting token claims, or verifying token structure. IMPORTANT: This decodes without verifying — for security validation, verify signatures server-side. Returns: {header, payload, claims, expiresAt, algorithm}. No API key required — x402 micropayment $0.001/call on Base L2.
How to connect
https://jwt-decoder--axel-belfort.run.tools
tools/list returns the expected tools before relying on them in production.Listing quality
Observable facts from our catalog and daily probe — not a safe-to-install badge.
- Surface
- Tools indexed
- Live handshake
- Auth required
- Auth gate
- Auth gate
- Tools source
- tools/list (live)
Observable catalog + probe facts — not a safe-to-install badge.
Tools
(1)-
security_decode_jwtUse this when you need to decode and inspect a JWT token without verifying its signature. Returns the full header, payload, and expiration status. 1. header -- algorithm (RS256, HS256, etc.) and toke
Tool source: tools/list (live) · last probed 2026-09-18