# Jwt Generator — REST API endpoint `jwt-generator`

Generate a signed JWT (HS256, HS384, or HS512 via HMAC) and return the token plus the decoded header and payload. The payload contains sub, name, iat, exp, and any custom claims. Asymmetric algorithms (RS*/ES*) are not supported.

- Category: security
- MCP server: https://mcp.findutils.com/ (Streamable HTTP, no API keys, 120 req/min per IP)
- REST endpoint: POST https://api.findutils.com/api/tools/jwt-generator/execute (no API keys, 60 req/min per IP)
- Reference page: https://findutils.com/api/jwt-generator/
- Same tool on the other surface: https://findutils.com/mcp/jwt-generator/

## Call the endpoint (verified example)

```bash
curl -X POST https://api.findutils.com/api/tools/jwt-generator/execute \
  -H "Content-Type: application/json" \
  -d '{
    "secret": "my-secret",
    "subject": "u1",
    "name": "Ann",
    "expires_in": 3600
  }'

# Parameter schema
curl https://api.findutils.com/api/tools/jwt-generator
```

## Input schema

| Argument | Type | Required | Description |
|---|---|---|---|
| `secret` | string | yes | The HMAC secret used to sign the token. |
| `algorithm` | string (HS256 \| HS384 \| HS512) | no | Signing algorithm. Default: HS256. Default: `"HS256"`. |
| `subject` | string | no | The "sub" claim. Default: "1234567890". Default: `"1234567890"`. |
| `name` | string | no | The "name" claim. Default: "John Doe". Default: `"John Doe"`. |
| `expires_in` | integer | no | Seconds until expiry; exp = iat + expires_in. Default: 3600. Default: `3600`. |
| `custom_claims` | object | no | Extra claims merged into the payload. An object, or a JSON object string. |
| `issued_at` | integer | no | Unix timestamp (seconds) for the "iat" claim. Default: now. |

Example arguments (verified):

```json
{
  "secret": "my-secret",
  "subject": "u1",
  "name": "Ann",
  "expires_in": 3600
}
```

OpenAPI 3.1 spec: https://findutils.com/api/openapi.json · Interactive docs: https://findutils.com/api/docs/

## Also an MCP tool

```bash
claude mcp add findutils --transport http https://mcp.findutils.com/
```

Then ask the client to call `findutils:jwt_generator`. Full MCP reference: https://findutils.com/mcp/jwt-generator/

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