Microsoft SQL Server
Read-only MCP for Microsoft SQL Server: metadata discovery, parameterized SELECT, plans.
Using Microsoft SQL Server in Claude, Cursor, Gemini CLI, Cline, or Zed?
MCP tool contracts can change remotely with no version bump. The mcpindex gate pins each contract and HOLDs the call when it drifts-before your agent acts. Zero credentials. This is not the package install for this server itself (use Install this server for that).
Rewrites your MCP host config so each server launches behind the gate. Inspect first: curl -fsSL https://mcpindex.ai/install.sh | less
uv tool install mcpindex-gate && mcpindex-config-wireSemantic screen found no manipulation pattern in the description. Conformance probe not yet run.
mcpindex.integrity.descriptionpassINFOevidence“No malicious instructions found”via static_description
- - Semantic screen only - the deterministic conformance probe has not run on this server
- - Confidence is reported but not yet calibrated (v1)
- - Screen reads the tool description, not the live behavior
- - advisory
- - registry description only no input schema
- - screen model 8b
Semantic screen: an LLM judge reads the tool description for hidden instructions (status PARTIAL). A pass means the description is not lying, not that the tool is safe: a high-capability tool with an honest description still warrants caution. The deterministic conformance probe has not been run on this server yet, so the screen here is semantic-only. Posture: advisory. Confidences are reported but not yet calibrated (calibrated=false at v1). Full verdict history is not shown on this page.
Own this server? Screen its description →
That verdict was true at screening time (snapshot 2026-07-31).
Contracts can change after screening, with no version bump. The gate pins Microsoft SQL Server’s tool contracts on first sight and holds any silent change before your agent acts - the check that keeps being true on Tuesday.
See your first HOLD in 2 minutes →
Related: how to trust an MCP server · screen before install · silent contract drift
A live verdict badge for your README or listing. It reflects the current screen, links back here, and updates when the verdict does.
[](https://mcpindex.ai/server/io-github-alyiox-mcp-mssql)<a href="https://mcpindex.ai/server/io-github-alyiox-mcp-mssql"><img src="https://mcpindex.ai/api/v1/badge/io-github-alyiox-mcp-mssql" alt="mcpindex verdict" height="20" /></a>MCPMSSQL_CONNECTION_STRINGDefault profile SQL Server connection string (often contains secrets). Optional if profiles are only in user appsettings.
MCPMSSQL_DESCRIPTIONOptional human-readable description for the default profile.
MCPMSSQL_QUERY_MAX_ROWSMax rows per interactive query (default 500; ceiling 1000).
MCPMSSQL_QUERY_COMMAND_TIMEOUT_SECONDSInteractive query command timeout in seconds (default 30).
MCPMSSQL_QUERY_SNAPSHOT_MAX_ROWSMax rows for snapshot queries (default 10000; ceiling 50000).
MCPMSSQL_QUERY_SNAPSHOT_COMMAND_TIMEOUT_SECONDSSnapshot query timeout in seconds (default 120).
MCPMSSQL_ANALYZE_COMMAND_TIMEOUT_SECONDSExecution plan analysis timeout in seconds (default 300).
MCPMSSQL_ALLOW_WRITEEnable write commands (DDL/DML) via run_command on the default profile (default false). Soft guard only — prefer a db_datareader login for a hard read-only guarantee.
MCPMSSQL_WRITE_COMMAND_TIMEOUT_SECONDSWrite command timeout in seconds (default 60; ceiling 600).
DOTNET_ENVIRONMENTSet to Development to load dotnet user-secrets (local dev).
Local-first MCP gateway and homelab control plane with CLI, HTTP API, and web UI.
Rust MCP and CLI server for Sonarr, Radarr, Prowlarr, Plex, Jellyfin, and download clients.
MCP server for Sam's Club Sponsored Ads APIs