Firebase Custom Token - verify JWT fails in apigee with the error Key Id Missing for JWT Token: policy

[Former Community Member]

i'm generating the JWT custom token using Firebase Admin SDK.. the token gets generated and i am trying to add the verify the same token in apigee api tool.

when i am trying to verify the token - i have been receiving message "Key Id Missing for JWT Token"

when i parse the taken itself in jwt.io i don't see KID attribute in the token .. is that that reason why parsing is failing. ?

i have written a custom service and using the public key listed by google , i can verify the token.

so i need some guidance here what is missing piece here..

https://firebase.google.com/docs/auth/admin/verify-id-tokens

i have tried to very with google listed public key/ jwk and no luck