Polar

Polar OAuth2 (OIDC-shaped) with PKCE (S256). No id-token direct sign-in.

Configure

from better_auth import BetterAuth
from better_auth.oauth.providers_ext import Polar

auth = BetterAuth(
    secret=...,
    social_providers={
        "polar": Polar(client_id="…", client_secret="…"),
    },
)

Or name-keyed (no import):

auth = BetterAuth(
    secret=...,
    social_providers={
        "polar": {"client_id": "…", "client_secret": "…"},
    },
)

Options

Field	Type	Default	Notes
client_id	str | list[str]	required
client_secret	str	required

All shared ProviderConfig options apply — TS's prompt option maps to authorize_params={"prompt": "…"}.

Notes

• Default scopes: openid profile email.
• Register {base_url}{base_path}/callback/polar as the redirect URI on the Polar OAuth client.
• Profile mapping: id from id, name prefers public_name then username, avatar from avatar_url; email_verified defaults to False when Polar omits it.