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MCP SQL Server

MCP SQL Server

Public
JubinSaniei/mcp-mssql

A Model Context Protocol server that allows Large Language Models like Claude to execute SQL queries, explore database schemas, and maintain persistent connections to SQL Server databases.

Verified
typescript
0 tools
May 30, 2025
Updated May 30, 2025
Configuration Requirements
none
Configure authentication and required variables to access this MCP server
Required Environment Variables
SQL_ENCRYPT
Optional
string

Enable encryption (set to 'false' to disable)

Default: true
SQL_INITIAL_RETRY_DELAY
Optional
string

Initial delay (ms) before retrying a failed connection

Default: 1000
MCP_SERVER_NAME
Optional
string

Name of the MCP server

Default: MSSQL Server
SQL_ALLOWED_DATABASES
Optional
string

Comma-separated list of databases the server is allowed to access. If empty, access is less restricted (relies on DB user permissions).

SQL_PORT
Optional
string

SQL Server port

Default: 1433
SQL_POOL_MIN
Optional
string

Min connections in pool

Default: 0
SQL_POOL_IDLE_TIMEOUT
Optional
string

Idle timeout for connections in pool (ms)

Default: 30000
SQL_MAX_RETRY_DELAY
Optional
string

Maximum delay (ms) for connection retries (uses exponential backoff)

Default: 30000
SQL_SCHEMA_CACHE_TTL
Optional
string

Time-To-Live for schema cache (ms)

Default: 300000
SQL_PASSWORD
Optional
string

SQL Server password

SQL_CONNECTION_TIMEOUT
Optional
string

Connection timeout (ms)

Default: 30000
SQL_TRUST_SERVER_CERT
Optional
string

Trust server certificate (set to 'false' to disable)

Default: true
SQL_USER
Optional
string

SQL Server username

Default: sa
SQL_DATABASE
Optional
string

Default database name to connect to

Default: master
LOG_LEVEL
Optional
string

Log level for pino logger (e.g., 'fatal', 'error', 'warn', 'info', 'debug', 'trace', 'silent')

Default: info
SQL_SERVER
Optional
string

SQL Server hostname or IP

Default: localhost
MCP_SERVER_VERSION
Optional
string

Version of the MCP server

Default: 1.0.0
SQL_MAX_RETRIES
Optional
string

Max number of retries for initial connection attempts

Default: 3
SQL_POOL_MAX
Optional
string

Max connections in pool

Default: 10
SQL_REQUEST_TIMEOUT
Optional
string

Request timeout for queries (ms)

Default: 30000

Security Notice

Your environment variables and credentials are securely stored and encrypted. LangDB never shares these configuration values with third parties.

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