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Connect Claude to your SQL Server database

Claude queries your SQL Server data through Myriade's MCP server: with business context, read-only, under each user's access rights.

Tested by Myriade

Prerequisites

  • A Myriade account on app.myriade.ai (or on your self-hosted instance).
  • Network access from Myriade to SQL Server, with a read-only account.
  • Claude, on a plan that allows custom MCP servers (see the note in step 2).

1. Connect SQL Server to Myriade

Host, port (1433 by default), user and password. The database is optional: without one, Myriade discovers the other databases of the instance. A client-side query timeout can be set per connection.

Best practice: use a dedicated login, member of db_datareader on the relevant databases.

2. Add Myriade to Claude

Claude supports remote MCP servers. Add Myriade once, then Claude queries your databases with your access rights.

  1. 1Take the Myriade MCP address: https://app.myriade.ai/mcp.
  2. 2In Claude (web or desktop), go to Customize → Connectors → Add custom connector and paste it. On Team and Enterprise plans, an Owner adds it in the organization settings. In Claude Code, run the command below.
  3. 3Approve access, then sign in to Myriade: the session then renews automatically.
claude mcp add --transport http myriade https://app.myriade.ai/mcp

Self-hosted instance behind IP filtering? Allow Anthropic's outbound range (160.79.104.0/21). Claude Code also accepts a myr_… access token in the Authorization header; the token acts with the rights of the Myriade admin who created it.

Self-hosted Myriade (optional): replace app.myriade.ai with your instance's host.

3. Check the connection

Ask Claude a few questions:

  • “Which tables describe customer orders in SQL Server?” The assistant searches the Myriade catalog before writing SQL.
  • “What was revenue by region last quarter?” Read-only SQL, run under your access rights, saved in Myriade.
  • “Did any alert fire on our KPIs this week?” The assistant reads Myriade's checks and alerts.

What Myriade enforces

  • INSERT, UPDATE, DELETE, DROP… blocked; a query that cannot be parsed is rejected
  • Maximum duration per query and a cap on concurrent queries
  • At most 50 rows returned to the assistant
  • Database visibility, team rules on tables and columns
  • Protected columns stay masked, including for the assistant
Why connect through Myriade

Frequently asked questions

Can Claude modify or delete data in SQL Server?

No. SQL queries that Claude sends through Myriade's MCP server are parsed before they reach SQL Server: any write (INSERT, UPDATE, DELETE, DROP…) is rejected, even nested in a subquery, and a query that cannot be parsed is refused. As a precaution, also connect Myriade to SQL Server with a read-only account.

Does Claude connect directly to SQL Server?

No. Claude only talks to Myriade's MCP server: Myriade alone holds the SQL Server credentials and runs the queries. On Myriade Cloud, the MCP address is public and Myriade must be able to reach SQL Server. If you choose to self-host Myriade, the connection to SQL Server starts from your own infrastructure, and the MCP address must stay reachable by Claude.

Is Claude compatible with Myriade?

Yes. Myriade has tested and documented the connection between Claude and its MCP server, with OAuth sign-in or an access token.

No Myriade account yet?

Book a demo to see Myriade on your own data.