JWT claim policy tester

Open JWT claim policy tester on Happytails.ai. This view has the same page content and links, with explicit tool capabilities. Read the processing notes before using a tool.

Tool capabilities

{
  "id": "jwt-claim-policy-tester",
  "category": "developer-tools",
  "built": true,
  "requirements": "Input is one compact JWT of up to 16384 characters. The evaluation time must fall between 1970-01-01T00:00:00Z and 9999-12-31T23:59:59Z. Clock skew is 0 to 3600 seconds and maximum age up to 315360000 seconds. Decoding and checks run locally in your browser. Download the JSON report with every rule result.",
  "implementation": {
    "fields": [
      {
        "key": "time",
        "label": "Evaluation time (UTC or Unix seconds)",
        "value": "2026-10-16T12:00:00Z",
        "type": "text"
      },
      {
        "key": "issuer",
        "label": "Accepted issuers (comma separated)",
        "value": "",
        "type": "text"
      },
      {
        "key": "audience",
        "label": "Accepted audiences (comma separated)",
        "value": "",
        "type": "text"
      },
      {
        "key": "subject",
        "label": "Expected subject",
        "value": "",
        "type": "text"
      },
      {
        "key": "requiredClaims",
        "label": "Required claims (comma separated)",
        "value": "",
        "type": "text"
      },
      {
        "key": "requireExp",
        "label": "Require an exp claim",
        "value": false,
        "type": "checkbox"
      },
      {
        "key": "maxAgeSeconds",
        "label": "Maximum token age in seconds (0 = off)",
        "value": "0",
        "type": "number",
        "min": 0,
        "max": 315360000,
        "step": 1
      },
      {
        "key": "clockSkewSeconds",
        "label": "Allowed clock skew in seconds",
        "value": "60",
        "type": "number",
        "min": 0,
        "max": 3600,
        "step": 1
      }
    ],
    "registrationFamily": "crypto-formats-reference",
    "inputMaxLength": 16384,
    "inputErrorCode": "CRYPTO_FORMATS_REFERENCE_TOO_LONG",
    "note": "Runs in your browser. Claims are checked against your policy at the time you enter; the signature is not verified.",
    "experience": {
      "automatic": false,
      "single": true,
      "inputMaxLength": 16384,
      "inputMode": "text",
      "label": "JSON Web Token",
      "placeholder": "eyJhbGciOi...",
      "help": "Paste one token in the form header.payload.signature. Up to 16,384 characters. Review the settings before running.",
      "helpParts": [
        "Paste one token in the form header.payload.signature.",
        "Up to 16,384 characters.",
        "Review the settings before running."
      ],
      "action": null
    },
    "mode": "explicit",
    "interactive": false
  },
  "execution": "Browser interface",
  "api": null,
  "browser_agent": {
    "supported": true,
    "name": "run_current_tool",
    "discovery": "WebMCP on the human page in a supporting browser",
    "verification": "See audit/API-AUDIT.md; availability is not verification"
  }
}

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