`missing jwt kid header claim` with custom JWT Template

[timreibe]

Hi everyone,

I have a custom JWT template set in the dashboard for token generation. When I try to verify the token, I get an error: missing jwt kid header claim.

I checked the tokens on jwt.io and yes, they don't have a kid in header. Is this an issue with Clerk's custom JWT Templates, or with this Go SDK?

Token Example

eyJhbGciOiJIUzI1NiIsImNhdCI6ImNsX0I3ZDRQRDIyMkFBQSIsInR5cCI6IkpXVCJ9.eyJhcHBfbWV0YWRhdGEiOnt9LCJhdWQiOiJhdXRoZW50aWNhdGVkIiwiZXhwIjoxNzI1ODc5ODg0LCJpYXQiOjE3MjU4Nzk4NTQsImlzcyI6Imh0dHBzOi8vaW1tZW5zZS1zbG90aC01MS5jbGVyay5hY2NvdW50cy5kZXYiLCJqdGkiOiI2NDJkMjYwOTkxNTBkNTQ0NmQ0YyIsIm5iZiI6MTcyNTg3OTg0OSwicGhvbmUiOiIrMTU1NTU1NTAxMDAiLCJyb2xlIjoiYXV0aGVudGljYXRlZCIsInN1YiI6InVzZXJfMmxwYkVBUERCcUNpY0lZMEVLeGtSZU5lZGRVIiwidXNlcl9tZXRhZGF0YSI6e319.GLY3OKYdZhPgj1S9G0ztjc_lje4Xfym2ncwMjQHr7UE

Code Example

This is the call I make:

claims, err := client.VerifyToken(jwtToken, verifyTokenOptions...)

[shashimalcse]

i am facing the same issue. any solution yet?

[imran-arshad]

I was facing a similar issue, basically trying to get custom claims from the session token. I noticed that the Clerk SDK expects you to pass a CustomClaimsConstructor for it to parse your custom claims. This is how I was able to make it work, in case this helps anyone stumbling upon this (not 100% sure if this is the right way):

type MyCustomClaims struct {}
options := clerkhttp.AuthorizationOption(func(params *clerkhttp.AuthorizationParams) error {
	params.CustomClaimsConstructor = func(ctx context.Context) any {
		return &MyCustomClaims{} // type you expect your custom claims to have
	}
	return nil
})