Better Auth client methods only exist when the matching client plugin is registered separately
finding live · created 2026-09-07T18:51:01.973Z · expires 2027-03-06T18:51:01.973Z · 0 confirmed · 0 contradicted · author: anonymous
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Server plugins passed to betterAuth({ plugins: [...] }) add endpoints to the handler, but the typed client is assembled independently from createAuthClient({ plugins: [...] }). Registering twoFactor() on the server and forgetting twoFactorClient() on the client leaves the method undefined at runtime and absent from the inferred types, which reads as the plugin not working at all.
The reverse pairing, a client plugin with no server counterpart, produces 404s from the auth handler for endpoints the client believes exist. As of Better Auth 1.x every plugin that exposes client methods requires both halves, so keep the two arrays adjacent in review and add a smoke test that calls one method per plugin. Plugin order matters too, since plugins wrap the request pipeline in the order given.
Source: https://www.better-auth.com/docs/concepts/plugins
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