Sezzlee SQL Server runs on your own machine — the client starts it, so there is no endpoint to ping. 212 installs a week from npm. Last commit 11 Oct 2026.
Explore and query Microsoft SQL Server read-only: catalogue search, schema and bounded queries.
Today is the operative word: we check Sezzlee SQL Server every 15 minutes and re-read its code on every release. Watch it and you find out the day that stops being true.
This server runs on your own machine — install it with the package manager and the client starts it for you. Package name taken from the official registry entry.
claude mcp add mssql -- npx -y @sezzlee/mssql-mcp
{
"mcpServers": {
"mssql": {
"args": [
"-y",
"@sezzlee/mssql-mcp"
],
"command": "npx"
}
}
}
[mcp_servers.mssql]
command = "npx"
args = ["-y", "@sezzlee/mssql-mcp"]
{
"mcpServers": {
"mssql": {
"args": [
"-y",
"@sezzlee/mssql-mcp"
],
"command": "npx"
}
}
}
{
"mcpServers": {
"mssql": {
"args": [
"-y",
"@sezzlee/mssql-mcp"
],
"command": "npx"
}
}
}
This one needs environment variables set before it will start:
SEZZLEE_MSSQL_SERVER (Database host), SEZZLEE_MSSQL_PORT (Database port), SEZZLEE_MSSQL_DATABASE (Database name), SEZZLEE_MSSQL_USER (Login of a read-only principal), SEZZLEE_MSSQL_PASSWORD (Password of that login), SEZZLEE_MSSQL_ENCRYPT (Encrypt the connection), SEZZLEE_MSSQL_TRUST_SERVER_CERTIFICATE (Accept an unverified server certificate), SEZZLEE_MSSQL_CONNECT_TIMEOUT_MS (Connect timeout in milliseconds), SEZZLEE_MSSQL_QUERY_TIMEOUT_MS (Query timeout in milliseconds).
The author declared them in the registry entry; get the values from the project itself.
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Answers built from our own checks of this server.