Data Charter MCP Server

A local SQL workspace over files and databases, federated by DuckDB and governed by charter.yaml. Agents get read-only, PII-masked access to what the contract grants. Apache-2.0. No paid edition.

People who work with data contracts, duckdb and local first and want it reachable from Claude, Cursor, VS Code, or another MCP client. The project is written in Python.

VERIFIED ACTIVE

LAST COMMIT 2026-09-16 · ★ 12 · #31 OF 168 MAINTAINED DATABASE · VERIFIED 2026-09-18

Apache-2.0 · Python servers · how we verify → /methodology

01 · Install Data Charter

Claude Code

claude mcp add datacharter-datacharter -- uvx datacharter

Claude Desktop / Cursor / VS Code - add to config

{
  "mcpServers": {
    "datacharter-datacharter": {
      "command": "uvx",
      "args": [
        "datacharter"
      ]
    }
  }
}

Same JSON for Cursor. For VS Code, rename the top-level key from `mcpServers` to `servers`.

Using another client? Same JSON, different key

Claude Desktop · mcpServers

Cursor · mcpServers

VS Code · servers

Windsurf · mcpServers

Zed · context_servers

Cline · mcpServers

Roo Code · mcpServers

Continue · mcpServers

LibreChat · mcpServers

Gemini CLI · mcpServers

Codex CLI · mcp_servers

Full setup guides: every client.

02 · Evidence

Security posture

What to check before giving this server access to your agent - from the registry, GitHub, and our own probes. We don't score safety; we show what's verifiable.

runs as local process (stdio) - runs on your machine with your user's permissions

repo age created 2026-07-24 - young repo, little track record yet

license Apache-2.0 - declared in the repository

pypi package datacharter - check the name against the project README before installing (PyPI has no namespace ownership)

registry namespace io.github.datacharter is GitHub-verified and matches the repo owner

03 · What Data Charter can do

Prose above is summarized from the project's README and registry record - no invented capabilities.

Latest releases

v0.44.0 · 2026-09-15

DataCharter 0.44.0 · Same Apache-2.0 kernel for a laptop and for a company. No paid edition. · uvx datacharter serve, drop a file, PII comes back as •••. · MCP HTTP with OAuth, principals and grants in git, Helm, SIEM…

v0.43.0 · 2026-08-26

Governance for the Duck Stack lakehouse. As DuckDB scales, DataCharter travels with the data. · Added · DuckLake connector. A new ducklake source type attaches a DuckLake lakehouse read-only - metadata in a DuckDB /…

v0.42.1 · 2026-08-13

dp --reset --budget N now persists the announced ε cap (it previously cleared the ledger, so the next run reverted to the 5.0 default). Closes the last item from the 0.42.0 audit re-verification. Verified: wheel gate…

04 · Who maintains Data Charter

DataCharter is maintained by datacharter. It's the only MCP server we track from this author; the repo dates to Jul 2026.

05 · Facts

repository: github.com/datacharter/datacharter
category: database - ranked #31 of 168 actively-maintained database servers as of 2026-09-18.
release cadence: 10+ releases in the last 90 days (latest 2026-09-15)
registry: io.github.datacharter/datacharter (active, first published 2026-07-28 · 63 versions)
packages: pypi:datacharter

06 · Data Charter FAQ

What is Data Charter?

A local SQL workspace over files and databases, federated by DuckDB and governed by charter.yaml. Agents get read-only, PII-masked access to what the contract grants. Apache-2.0. No paid edition.

Is Data Charter still maintained?

Yes - as of 2026-09-18, its last commit was 2026-09-16 and it shipped 10+ releases in the last 90 days. We re-verify nightly.

How do I install Data Charter?

Run `uvx datacharter`. You can also paste the ready-made client config above.

Does Data Charter run locally?

Yes - it's a stdio server: it runs on your machine (via uvx) with your user's permissions. Your data stays local unless the server itself calls external APIs.

07 · Alternatives to Data Charter

Alternatives to Data Charter

Maintained database servers if Data Charter isn't the fit.

Pairs well with

Servers that cover what Data Charter doesn't - only shown when the pairing reason fits the companion.

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