JSON Web Token (JWT) decoder — parse an unverified compact JWS header and claims
JSON Web Token (JWT) decoder — parse an unverified compact JWS header and claims and evaluate advisory NumericDate times without signature verification or URL fetching.
Answeringour last check, 2026-09-24
1 of 1checks answered this week
633 msmedian answer time
$0.005listed price per call
$0.005price it asked us
Paid test badge: not yet. The checks above are free: we call the tool without paying and read the payment request it sends back. The Verified badge needs paid calls whose answers match the promised output, and nobody can buy a badge.
Endpoint
POST https://artifact-inspector.use.x402atlas.com/jwt
| Category | Market data |
|---|---|
| Provider host | artifact-inspector.use.x402atlas.com |
| Networks | eip155:137, eip155:42161, eip155:8453 |
| Payment schemes | exact |
| Self-reported calls, 30 days | 4 from 3 payers (the provider's figure, not ours) |
Our checks, last 30 days
| Day | Result | HTTP | Asked | Time |
|---|---|---|---|---|
| 2026-09-24 | valid payment request | 402 | $0.005 | 633 ms |
Example input (from the provider)
{
"body": {
"at_time": "2024-06-01T12:00:00Z",
"token": "eyJhbGciOiJIUzI1NiIsImtpZCI6InN5bnRoZXRpYy1leGFtcGxlIiwidHlwIjoiSldUIn0.eyJhdWQiOiJhcnRpZmFjdC1pbnNwZWN0b3IiLCJleHAiOjE3MTcyODY0MDAsImlhdCI6MTcxNzIwMDAwMCwiaXNzIjoieDQwMkF0bGFzIHN5bnRoZXRpYyIsIm5iZiI6MTcxNzIwMDAwMCwic3ViIjoiYWdlbnQtZGVtbyJ9.c3ludGhldGljLW5vdC1hLXJlYWwtc2lnbmF0dXJl"
},
"bodyType": "json",
"method": "POST",
"type": "http"
}
Promised output schema (from the provider)
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"body": {
"additionalProperties": false,
"properties": {
"at_time": {
"description": "Fixed RFC3339 instant for advisory NumericDate comparisons",
"format": "date-time",
"type": "string"
},
"token": {
"description": "One compact three-segment JWS; decoded only and never verified",
"maxLength": 32768,
"minLength": 3,
"pattern": "^[A-Za-z0-9_-]+\\.[A-Za-z0-9_-]+\\.[A-Za-z0-9_-]*$",
"type": "string"
}
},
"required": [
"token",
"at_time"
],
"type": "object"
},
"bodyType": {
"enum": [
"json",
"form-data",
"text"
],
"type": "string"
},
"method": {
"enum": [
"POST"
],
"type": "string"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method",
"bodyType",
"body"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"additionalProperties": false,
"properties": {
"_atlas": {
"additionalProperties": false,
"description": "Atlas documentation and related-route metadata added after deployment",
"properties": {
"docs": {
"description": "Documentation URL for this bridge",
"format": "uri",
"maxLength": 512,
"type": "string"
},
"related": {
"description": "Bounded related Atlas routes",
"items": {
"additionalProperties": false,
"description": "One related Atlas route",
"properties": {
"bridge": {
"description": "Related bridge name",
"maxLength": 64,
"type": "string"
},
"docs": {
"description": "Related bridge documentation URL",
"format": "uri",
"maxLength": 512,
"type": "string"
},
"summary": {
"description": "Short capability summary",
"maxLength": 256,
"type": "string"
},
"url": {
"description": "Related route URL",
"format": "uri",
"maxLength": 512,
"type": "string"
}
},
"required": [
"bridge",
"url",
"docs",
"summary"
],
"type": "object"
},
"maxItems": 3,
"type": "array"
}
},
"required": [
"docs"
],
"type": "object"
},
"algorithm_version": {
"const": "jwt-unverified-decode-v1",
"description": "Pinned strict decode contract",
"type": "string"
},
"at_time": {
"description": "Applied advisory comparison instant",
"format": "date-time",
"type": "string"
},
"claims": {
"additionalProperties": true,
"description": "Decoded untrusted JWT claims with JSON numbers preserved",
"type": "object"
},
"header": {
"additionalProperties": true,
"description": "Decoded untrusted JOSE header; arbitrary members are preserved",
"type": "object"
},
"operation": {
"const": "jwt-decode",
"description": "Stable operation name",
"type": "string"
},
"signature_bytes": {
"description": "Decoded signature segment size; not a validity result",
"maximum": 32768,
"minimum": 0,
"type": "integer"
},
"signature_status": {
"const": "not_verified",
"description": "Prominent statement that no signature check occurred",
"type": "string"
},
"temporal": {
"additionalProperties": false,
"description": "Advisory exp, nbf, and iat comparisons against at_time",
"properties": {
"expiration": {
"additionalProperties": false,
"description": "One advisory NumericDate comparison",
"properties": {
"status": {
"description": "Advisory comparison status only",
"enum": [
"absent",
"invalid",
"valid",
"expired",
"active",
"not_yet_active",
"past_or_present",
"future"
],
"type": "string"
},
"value": {
"description": "Integral NumericDate or null when absent/invalid",
"type": [