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How to let an external agent query allowed databases over MCP with Masume

Serve chosen profiles to an agent over stdio with an access level per profile.

Short answer: Enable the profile for MCP in the settings screen or config, as described in docs/mcp.md; then run masume --mcp --check to check the enabled MCP profiles; run masume --mcp --profile <profile> to serve one allowed profile. All steps.

Credentials. The MCP server opens its own database connections, so each profile needs its access level and password source checked before an agent is connected.

Who it is forAn engineer who wants an AI agent to answer questions about a database, and who must limit what the agent can touch.

The problemGiving an agent direct database credentials with no limits is risky, and copying data by hand is slow.

The outcomeThe agent reads from allowed profiles through Masume, and writes are limited by the access level you set.

What you need first

  • A terminal on macOS, Linux, or Windows
  • A database you can reach, or a local SQLite file
  • One install method: Homebrew, npm, Go 1.27 or later, or a release package

Steps

  1. Enable the profile for MCP in the settings screen or config, as described in docs/mcp.md
  2. Run masume --mcp --check to check the enabled MCP profiles
  3. Run masume --mcp --profile <profile> to serve one allowed profile (inferred, check the README)
  4. Point your agent at the stdio server and confirm it lists the database tools

Prompt for your agent

Using the masume MCP server for profile <profile>, list the tables and report the row count of <table>. Expected output: a table list and one integer. Verify the count by running a matching count query in masume yourself.

Caveat. Read-only checks run in the client and on engines that support server-side enforcement, so confirm the level in docs/mcp.md for your engine.

Use this in your AI agent

Ask your agent

Using the Deduped MCP, get the setup steps for masumedb/masume and "Let an external agent query allowed databases over MCP"

Add Deduped to Claude Code once

claude mcp add --transport http deduped https://dedupedai.com/mcp

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