Heddle MCP Server

Content-addressed contracts and a verification cache that cut agent context by skipping proven code.

People who work with content addressed, developer tools and spec driven development and want it reachable from Claude, Cursor, VS Code, or another MCP client. The project is written in Python.

VERIFIED ACTIVE

LAST COMMIT 2026-09-01 · ★ 2 · #522 OF 945 MAINTAINED OTHER · VERIFIED 2026-09-18

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

01 · Install Heddle

Claude Code

claude mcp add davet47-heddle -- uvx heddle-mcp

Claude Desktop / Cursor / VS Code - add to config

{
  "mcpServers": {
    "davet47-heddle": {
      "command": "uvx",
      "args": [
        "heddle-mcp"
      ]
    }
  }
}

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

license Apache-2.0 - declared in the repository

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

registry namespace io.github.davet47 is GitHub-verified and matches the repo owner

03 · What Heddle can do

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

Latest releases

v0.3.1 · 2026-07-05

Covers 0.3.0 (2026-07-04, adoption) and 0.3.1 (2026-07-05, the registry listing) - 0.3.0 shipped without release notes, so both are here. No engine changes in either: the 5 MCP tools / 5 CLI commands surface and all…

04 · Who maintains Heddle

Heddle is maintained by davet47. We track 2 MCP servers from davet47 - 2 actively maintained, 4 combined GitHub stars, oldest repo from Jun 2026. Full record: all servers from davet47.

Hashloom Content-addressed contracts and a verification cache that cut agent context by skipping proven code. ★ 2

05 · Facts

repository: github.com/davet47/heddle
category: other - ranked #522 of 945 actively-maintained other servers as of 2026-09-18.
release cadence: 1 release in the last 90 days (latest 2026-07-05)
registry: io.github.davet47/heddle (active, first published 2026-07-05 · 3 versions)
packages: pypi:heddle-mcp

06 · Heddle FAQ

What is Heddle?

Content-addressed contracts and a verification cache that cut agent context by skipping proven code.

Is Heddle still maintained?

Yes - as of 2026-09-18, its last commit was 2026-09-01 and it shipped 1 release in the last 90 days. We re-verify nightly.

How do I install Heddle?

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

Does Heddle 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 Heddle

Alternatives to Heddle

Maintained other servers if Heddle isn't the fit.

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