Verify a JSON Web Token's signature and claims against a shared secret (HS*) or
Verify a JSON Web Token's signature and claims against a shared secret (HS*) or a PEM public key (RS/ES/PS). Returns { valid, payload } on success or { valid: false, reason } for a bad signature, expired/not-yet-active token, or a failed issuer/audience/subject check. Pass `algorithms` to pin the accepted signing algorithms and prevent algorithm-confusion attacks.
Answeringour last check, 2026-09-24
1 of 1checks answered this week
609 msmedian answer time
$0.004listed price per call
$0.004price 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://jwt.openverbs.com/v1/verify
| Category | Market data |
|---|---|
| Provider host | jwt.openverbs.com |
| Networks | eip155:8453 |
| Payment schemes | exact |
| Self-reported calls, 30 days | 3 from 1 payers (the provider's figure, not ours) |
Our checks, last 30 days
| Day | Result | HTTP | Asked | Time |
|---|---|---|---|---|
| 2026-09-24 | valid payment request | 402 | $0.004 | 609 ms |
Example input (from the provider)
{
"body": {
"algorithms": [
"HS256"
],
"issuer": "example",
"key": "example",
"token": "example"
},
"bodyType": "json",
"method": "POST",
"type": "http"
}
Promised output schema (from the provider)
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"body": {
"additionalProperties": false,
"properties": {
"algorithms": {
"description": "Accepted signing algorithms (subset of HS256, HS384, HS512, RS256, RS384, RS512, ES256, ES384, ES512, PS256, PS384, PS512). Strongly recommended.",
"items": {
"enum": [
"HS256",
"HS384",
"HS512",
"RS256",
"RS384",
"RS512",
"ES256",
"ES384",
"ES512",
"PS256",
"PS384",
"PS512"
],
"type": "string"
},
"minItems": 1,
"type": "array"
},
"audience": {
"description": "Required `aud` claim value.",
"type": "string"
},
"clockToleranceSec": {
"description": "Clock skew tolerance in seconds.",
"maximum": 86400,
"minimum": 0,
"type": "integer"
},
"ignoreExpiration": {
"description": "Do not treat an expired token as invalid.",
"type": "boolean"
},
"issuer": {
"description": "Required `iss` claim value.",
"type": "string"
},
"key": {
"description": "The HMAC shared secret (HS*) or the PEM-encoded public key (RS/ES/PS).",
"maxLength": 16384,
"minLength": 1,
"type": "string"
},
"subject": {
"description": "Required `sub` claim value.",
"type": "string"
},
"token": {
"description": "The compact JWT to verify.",
"maxLength": 32768,
"minLength": 1,
"type": "string"
}
},
"required": [
"token",
"key"
],
"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"
}
},
"required": [
"input"
],
"type": "object"
}