Microsoft SQL Server
Connect your agent to SQL Server for read-only metadata browsing, parameterized SELECTs, and execution plans on a .NET-friendly MCP server.
Overview
Microsoft SQL Server (mcp-mssql) is a Build-phase MCP server that offers read-only SQL Server metadata, parameterized SELECT, and plan analysis for agents.
What is this MCP server?
- Read-only Microsoft SQL Server MCP (metadata discovery, parameterized SELECT, plans)
- NuGet package Alyio.McpMssql v1.0.0 with dnx runtime hint
- Configurable row caps: default 500 rows per query, ceiling 1000 via MCPMSSQL_QUERY_MAX_ROWS
- Interactive query timeout default 30 seconds (MCPMSSQL_QUERY_COMMAND_TIMEOUT_SECONDS)
- Connection via MCPMSSQL_CONNECTION_STRING and optional profile appsettings
- Server version 1.0.0
- NuGet identifier Alyio.McpMssql with dnx runtime
- Default MCPMSSQL_QUERY_MAX_ROWS 500, ceiling 1000
Community signal: 5 GitHub stars.
What problem does it solve?
Agents cannot safely explore SQL Server schemas and plans without SSMS, risky ad-hoc SQL, or over-broad database permissions.
Who is it for?
.NET and SQL Server indie products where the agent should inspect data models and SELECT performance during implementation.
Skip if: DDL/DML write operations, backup/restore administration, or databases you cannot expose via a read-scoped login.
What do I get? / Deliverables
After configuring MCPMSSQL_CONNECTION_STRING and row or timeout limits, your agent can run bounded read-only queries and plans from the IDE.
- SQL Server metadata discovery via MCP tools
- Bounded parameterized SELECT result sets (default max 500 rows, ceiling 1000)
- Execution plan analysis for agent-guided query debugging
Recommended MCP Servers
Journey fit
Microsoft SQL Server integrations land while building APIs, reports, or legacy app features that still store data in MSSQL. NuGet-based stdio MCP fits the integrations shelf for enterprise-style databases without opening SSMS for every agent question.
How it compares
Read-only SQL Server MCP bridge, not an ORM generator or database migration skill.
Common Questions / FAQ
Who is mcp-mssql for?
Solo builders and small teams on Microsoft SQL Server who want MCP agents to explore metadata and run guarded SELECTs without SSMS context switching.
When should I use mcp-mssql?
Use it during backend build and debugging when you need schema discovery, sample data reads, or execution plan review with row and timeout limits.
How do I add mcp-mssql to my agent?
Install Alyio.McpMssql from NuGet (dnx), set MCPMSSQL_CONNECTION_STRING or profile appsettings, configure optional MCPMSSQL_QUERY_MAX_ROWS and timeout env vars, then register stdio MCP in your agent.