SHEETBASE_ENGINE_ONLINE
Sheetbase
Not a Wrapper
LLMs need structural integrity, not just an API proxy. Sheetbase executes raw Postgres queries against live sheet data via an ephemeral JSONB engine. Zero context pollution. Fail-closed safety.
MCP Client
Node.js
JSONB Engine
Sheets API
0%
Ephemeral Execution
Observe live queries against the synced Google Sheet replica.
Supabase SQL Engine
Live Sheet Sync
A
B
C
1
USER_01
Active
Premium
2
USER_02
Pending
Free
3
USER_03
Active
Pro
4
USER_04
Inactive
Free
5
USER_05
Active
Enterprise
Security Boundaries
Dual-auth architecture ensuring AI agents never possess raw Google tokens.
Human Operator (OIDC)
Users authenticate via Google OAuth. The OIDC flow provisions access tokens directly into the Better Auth account table.
Google OAuth Consent
Supabase Storageaccount.accessToken
MCP Client (API Keys)
AI Agents authenticate via Dashboard-generated API keys. The withMcpAuthmiddleware maps the key to the user's stored Google tokens.
Bearer sk_mcp_...
Security BoundarywithMcpAuth Interceptor