pyodbc-mcp-server
An MCP (Model Context Protocol) server that exposes a set of read-only tools for exploring and querying Microsoft SQL Server databases. It connects using Windows Authentication (Trusted Connection) via pyodbc and applies security controls intended to restrict operations to SELECT-only queries, with configurable timeouts and row-limiting.
Score Breakdown
⚙ Agent Friendliness
🔒 Security
Strengths: intended read-only enforcement; dangerous SQL keywords blocked; row limiting to reduce data exfiltration risk; uses Trusted_Connection (no credentials stored/transmitted per provided docs). Uncertainties: the exact SQL parsing/validation approach is not shown; keyword blocking may not cover all SQL injection/syntax edge cases without robust parsing; TLS enforcement for the DB connection is not explicitly documented in the provided content (score assumes typical pyodbc over encrypted connections but cannot confirm).
⚡ Reliability
Best When
You need an MCP-compatible read-only SQL Server data interface in a Windows domain environment where the executing identity already has least-privilege SELECT permissions.
Avoid When
You do not have Windows domain/Trusted Connection connectivity, or you require comprehensive multi-tenant auth, auditing, or a network-facing API with explicit rate-limiting controls documented by the service.
Use Cases
- • Schema exploration for SQL Server (tables, views, indexes, constraints, relationships, triggers, stored procedures/functions)
- • Safe read-only data retrieval for AI-assisted analysis via MCP tools/resources
- • Ad-hoc reporting queries limited to a maximum number of rows
- • Discovery of foreign key relationships to support data lineage/documentation tasks
Not For
- • Read-write database operations (INSERT/UPDATE/DELETE/DDL are not intended to be allowed)
- • Handling SQL authentication via usernames/passwords (it is Windows Auth focused)
- • Production systems requiring strict contractual SLAs or verified uptime metrics from the project docs (not provided in the provided content)
Interface
Authentication
Authentication is delegated to the Windows account/domain identity used by the process; database permissions (least privilege) are enforced by SQL Server.
Pricing
No pricing information is provided in the supplied README; repository metadata indicates MIT license.
Agent Metadata
Known Gotchas
- ⚠ This server is Windows-Authentication/Trusted Connection oriented; running outside the intended Windows/domain environment will fail.
- ⚠ Query safety relies on blocking dangerous keywords and SELECT-only enforcement; agents should still prefer tool parameters and avoid attempting unsupported SQL constructs.
- ⚠ Large queries may be truncated by row limits; agents should ask for smaller limits or targeted filters.
- ⚠ No explicit rate-limit headers/rate limiting documentation was provided; agents should avoid aggressive polling if the underlying environment throttles connections.
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Scores are editorial opinions as of 2026-04-04.