jwtApi

JSON Web Token Play

Build

• Open a command window on JwtApi project
• dotnet build

Execute Locally

• dotnet run
• Access https://localhost:5001/swagger/index.html in browser

Swagger UI displays in default Web browser

POST

Click POST to expand a form to create a base64-coded JWT string from payload model form inputs that you supply.

The payload model has a series of string values that Swagger defaults to "string". Freely change these. For example:

{
  "sub": "JWT API",
  "iss": "Demo",
  "aud": "Developers",
  "exp": "1571435961964",
  "claimA": "To be or not to be,",
  "claimB": "that is the question"
}

Click Execute. The JWT appears in the 200 success result.

eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJBdWQiOiJEZXZlbG9wZXJzIiwiQ2xhaW1BIjoiVG8gYmUgb3Igbm90IHRvIGJlLCIsIkNsYWltQiI6InRoYXQgaXMgdGhlIHF1ZXN0aW9uIiwiRXhwIjoiMTU3MTQzNTk2MTk2NCIsIklzcyI6InN0cmluZyIsIlN1YiI6IkpXVCBBUEkifQ.I8hKqpe-X54-Ozlb13usL2YX60EJWUShR517O8imIqw

Swipe and copy it to the clipboard.

GET

Click GET to expand a form to decode the payload of the JWT string parameter.

Paste the JWT into the token parameter field. Click Execute. The payload :

{
  "algorithmName": "HS256",
  "payload": {
    "sub": "JWT API",
    "iss": "Demo",
    "aud": "Developers",
    "exp": "1571435961964",
    "claimA": "To be or not to be,",
    "claimB": "that is the question"
  },
  "canSign": true,
  "serializer": null
}

JWT Debugger

Validate the demo API JWT encode and decode process by using the JWT Debbuger from https://jwt.io/#debugger.

The following screen capture shows the base64-encoded JWT pasted into the Encoded panel. If you alter one of the values in the Decoded panel, the string will change accordingly.