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Anthropic's Claude can now act as the issuer of the signed identity assertion that enterprise-managed auth requires for Supabase's MCP server, so organizations whose identity providers lack the MCP extension can still use one-time admin approval instead of per-member consent. Claude's assertion checks only confirm the member's identity and scope, not the sign-in itself, MFA, or Supabase's own rules, so those controls still rest with the identity provider and Supabase. Teams evaluating AI agent access to internal data should note that the trust boundary shifts to Claude's issuer role.
Source coveringSupabase

Enterprise-managed auth for MCP: Claude can now issue the identity assertion

Supabase4 min read

Claude can now issue the identity assertion for enterprise-managed auth on the Supabase MCP server when your identity provider can't.

You can now set up enterprise-managed auth for the Supabase MCP server even if your identity provider doesn't support the MCP Enterprise-Managed Authorization extension. Claude issues the signed identity assertion that previously had to come from your identity provider. After a Supabase org's owner or admin approves Claude and registers it as the issuer, every member with a matching Supabase SSO identity can use Supabase from Claude with their existing role and no per-member consent screen. Supabase: generally available to Team and Enterprise…

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