MS SQL Server MCP Server
A secure, read-only MCP server for Microsoft SQL Server with built-in performance monitoring and lock detection.
Caution. Specific findings reduced this grade. They are listed on the page. Grades reflect the full trust pyramid: code, verification depth, and reputation. New projects cap at C until adoption is earned.
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PiyapatRag
Source: Glama
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The grade above is for the source repository. Registries can serve a different version, so we mark the ones we were not able to read.
Disclosed vulnerabilities in this server's declared npm dependencies (via OSV). Whether each is reachable depends on the installed versions.
Model Context Protocol (MCP) TypeScript SDK does not enable DNS rebinding protection by default
MSSQL_ALLOWED_PROCEDURESComma-separated whitelist of stored procedures EXEC may call in read-only mode, e.g. dbo.GetReport,dbo.GetCustomerSummary. Empty/unset disables EXEC entirely. - NoMSSQL_DATABASEDatabase name - YesMSSQL_DOMAINMSSQL_USER SQL Server username (or domain user when is set) - YesMSSQL_ENCRYPTUse encryption (true/false) false NoMSSQL_ENV_FILE1. The path in (explicit override)MSSQL_PASSWORDpassword \MSSQL_POOL_MAXMax pooled connections 10 NoMSSQL_PORTSQL Server port 1433 NoMSSQL_READ_ONLYtrue = read-only allow-list validation. false = write mode: INSERT/UPDATE/DELETE/DDL allowed, but server-level dangerous statements stay blocked true NoMSSQL_REQUEST_TIMEOUTQuery timeout in ms 30000 NoMSSQL_SERVERlocalhost \MSSQL_TRUST_CERTTrust server certificate (true/false) false NoMSSQL_USERreadonly \All four hints declared on every tool
1/19 tools missing one or more hints — mssql_query (missing: readOnlyHint, destructiveHint, idempotentHint). OpenAI's directory rejects tools where any of the four hints are missing or non-boolean.
For every tool, set all four hints (readOnlyHint, destructiveHint, idempotentHint, openWorldHint) to explicit true/false values that match the handler’s actual behaviour.
Tests exist
No test files found
Add tests that exercise each declared tool.
Shell command execution
7 child_process calls — runs shell commands
Prefer library functions over shell-outs. If you must shell out, ensure all inputs are properly escaped.
Secrets not logged
1 secret value sent to console.log
Redact or omit secret values from log output.
Production dependencies are patched
0 critical, 1 high severity in production deps — @modelcontextprotocol/sdk@1.0.0 (high)
Run npm audit fix, or upgrade the affected packages to a non-vulnerable version.
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