JWT Token Decoder (No Verification)

x402

JWT Token Decoder (No Verification) is a paid API for AI agents from api.strale.io, paid per call via x402, $0.0216/call, status unknown (last checked 2026-10-10).

Decodes a JWT token without signature verification, returning header, payload, claims, expiry status, and time until expiry.

Price / call$0.0216

Seller volume →—

Success—

StatusUnknown

How this service works

Decode a JWT token without verification. Returns header, payload, claims, expiry status, and time until expiry. Algorithmic.

Output

Returns the decoded JWT header (algorithm, token type), full payload with all claims (e.g. sub, iat, exp, custom claims), a boolean expiry status indicating whether the token has expired, and the time remaining until expiry (or time since expiry).

Example use cases

Example prompt

“Can you decode this JWT for me and tell me what claims it contains and whether it's expired: eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJzdWIiOiIxMjM0NTY3ODkwIiwibmFtZSI6IkpvaG4gRG9lIiwiaWF0IjoxNTE2MjM5MDIyfQ.SflKxwRJSMeKKF2QT4fwpMeJf36POk6yJV_adQssw5c”

Technical details

Endpoint

GEThttps://api.strale.io/x402/jwt-decode?utm_source=zero.xyz

When to prefer

Use this endpoint when you need to inspect the contents of a JWT token — its claims, expiry, and header — without needing to verify the signature. Ideal for debugging, logging, or extracting user metadata from a token when you already trust the token's origin or simply need to read its data.

Side effects

Invalid or malformed JWT string returns an error indicating the token cannot be parsed
Missing token query parameter returns a validation error
Tokens with non-standard encoding may fail to parse correctly

Input

{
  "token": "eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJzdWIiOiIxMjM0NTY3ODkwIiwibmFtZSI6IkpvaG4gRG9lIiwiaWF0IjoxNTE2MjM5MDIyfQ.SflKxwRJSMeKKF2QT4fwpMeJf36POk6yJV_adQssw5c"
}

Schema · Request body

Field	Type	Description
tokenrequired	string

Output

{
  "_meta": {
    "payment": {
      "method": "x402",
      "price_usd": 0.0216,
      "settlement_id": "0x32502b70f18cda0aa9d7a31954ccaae723b23d2506dd46526424c691ac6bea6d"
    },
    "capability": "jwt-decode",
    "latency_ms": 0,
    "provenance": {
      "source": "algorithmic",
      "fetched_at": "2026-06-16T01:24:38.993Z"
    }
  },
  "claims": [
    "sub",
    "name",
    "iat"
  ],
  "header": {
    "alg": "HS256",
    "typ": "JWT"
  },
  "issuer": null,
  "payload": {
    "iat": 1516239022,
    "sub": "1234567890",
    "name": "John Doe"
  },
  "subject": "1234567890",
  "audience": null,
  "algorithm": "HS256",
  "issued_at": "2018-01-18T01:30:22.000Z",
  "expires_at": null,
  "is_expired": null,
  "not_before": null,
  "token_type": "JWT",
  "time_until_expiry_seconds": null
}

Schema · Response

{
  "header": {
    "type": "object"
  },
  "payload": {
    "type": "object"
  },
  "algorithm": {
    "type": "string"
  },
  "expires_at": {
    "type": "string"
  },
  "is_expired": {
    "type": "boolean"
  }
}

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