From the source

Introducing JWT Signing Keys

Supabase adds asymmetric JWT support and new API keys.

Capability change

Image published with the post by Supabase — Image from supabase.com

Supabase announced support for asymmetric JWTs with Supabase Auth, allowing token verification without relying on the Auth server.

The company also introduced new publishable and secret API keys to replace the legacy anon and service_role keys.

Asymmetric JWT support is available as an opt-in feature, with all new projects defaulting to it from October 1, 2025.

From the source
Asymmetric JWT support is available today as an opt-in feature. Starting October 1, 2025, all new projects will use asymmetric JWTs by default.
supabase.com

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