Mint a signed JSON Web Token from a JSON claims object, using a shared secret (H
Mint a signed JSON Web Token from a JSON claims object, using a shared secret (HS*) or a PEM private key (RS/ES/PS). Supports expiresInSec, notBeforeSec, issuer, audience, subject and keyid. An unusable key or option is rejected before payment.
Not tested: has real-world effectsour last check, 2026-09-24
0 of 0checks answered this week
n/amedian answer time
$0.004listed price per call
n/aprice it asked us
Paid test badge: not yet. The checks above are free: we call the tool without paying and read the payment request it sends back. The Verified badge needs paid calls whose answers match the promised output, and nobody can buy a badge.
Endpoint
POST https://jwt.openverbs.com/v1/sign
| Category | Market data |
|---|---|
| Provider host | jwt.openverbs.com |
| Networks | eip155:8453 |
| Payment schemes | exact |
| Self-reported calls, 30 days | 4 from 2 payers (the provider's figure, not ours) |
Our checks, last 30 days
We never call tools that send, buy, move money or file anything, not even without paying.
Example input (from the provider)
{
"body": {
"algorithm": "HS256",
"expiresInSec": 1,
"key": "example",
"notBeforeSec": 1,
"payload": {}
},
"bodyType": "json",
"method": "POST",
"type": "http"
}
Promised output schema (from the provider)
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"body": {
"additionalProperties": false,
"properties": {
"algorithm": {
"description": "Signing algorithm, one of HS256, HS384, HS512, RS256, RS384, RS512, ES256, ES384, ES512, PS256, PS384, PS512.",
"enum": [
"HS256",
"HS384",
"HS512",
"RS256",
"RS384",
"RS512",
"ES256",
"ES384",
"ES512",
"PS256",
"PS384",
"PS512"
],
"type": "string"
},
"audience": {
"description": "Set the `aud` claim.",
"type": "string"
},
"expiresInSec": {
"description": "Set `exp` this many seconds from now.",
"minimum": 0,
"type": "integer"
},
"issuer": {
"description": "Set the `iss` claim.",
"type": "string"
},
"key": {
"description": "The HMAC shared secret (HS*) or the PEM-encoded private key (RS/ES/PS).",
"maxLength": 16384,
"minLength": 1,
"type": "string"
},
"keyid": {
"description": "Set the `kid` header.",
"type": "string"
},
"noTimestamp": {
"description": "Omit the automatic `iat` claim.",
"type": "boolean"
},
"notBeforeSec": {
"description": "Set `nbf` this many seconds from now.",
"minimum": 0,
"type": "integer"
},
"payload": {
"description": "The claims to encode (an object).",
"type": "object"
},
"subject": {
"description": "Set the `sub` claim.",
"type": "string"
}
},
"required": [
"payload",
"key",
"algorithm"
],
"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"
}