Cathedral - Persistent Memory for AI Agents MCP Server

The identity layer for AI agents. Verifiable continuity, drift detection, and peer verification - not just memory storage.

People who work with fastapi, identity and memory and want it reachable from Claude, Cursor, VS Code, or another MCP client. The project is written in Python.

VERIFIED ACTIVE

LAST COMMIT 2026-06-13 · ★ 10 · #219 OF 304 MAINTAINED MEMORY · VERIFIED 2026-09-18

MIT · Python servers · how we verify → /methodology

01 · Install Cathedral - Persistent Memory for AI Agents

before you install - you'll need

Set CATHEDRAL_API_KEY, CATHEDRAL_CORS_ORIGINS, CATHEDRAL_TTL_DAYS before connecting.

Claude Code

claude mcp add ailife1-cathedral --transport http https://cathedral-ai.com/mcp

Claude Desktop / Cursor / VS Code - add to config

{
  "mcpServers": {
    "ailife1-cathedral": {
      "url": "https://cathedral-ai.com/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

https://cathedral-ai.com/mcp

transport: streamable-http

endpoint alive - authentication required · probed 2026-09-17

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 · remote - your agent's requests go to cathedral-ai.com

endpoint auth requires authentication - rejected our unauthenticated MCP initialize

license MIT - declared in the repository

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

registry namespace io.github.AILIFE1 is GitHub-verified and matches the repo owner

03 · Who maintains Cathedral - Persistent Memory for AI Agents

Cathedral - Persistent Memory for AI Agents is maintained by ailife1. It's the only MCP server we track from this author; the repo dates to Jan 2026.

04 · Facts

repository: github.com/ailife1/cathedral
website: https://cathedral-ai.com/
category: memory - ranked #219 of 304 actively-maintained memory servers as of 2026-09-18.
registry: io.github.AILIFE1/cathedral-mcp (active, first published 2026-04-07 · 2 versions)
packages: pypi:cathedral-mcp

05 · Cathedral - Persistent Memory for AI Agents FAQ

What is Cathedral - Persistent Memory for AI Agents?

The identity layer for AI agents. Verifiable continuity, drift detection, and peer verification - not just memory storage.

Is Cathedral - Persistent Memory for AI Agents still maintained?

Yes - as of 2026-09-18, its last commit was 2026-06-13. We re-verify nightly.

How do I install Cathedral - Persistent Memory for AI Agents?

Run `uvx cathedral-mcp`. The README documents 3 environment variables (CATHEDRAL_API_KEY, CATHEDRAL_CORS_ORIGINS, CATHEDRAL_TTL_DAYS) to set first. Set CATHEDRAL_API_KEY, CATHEDRAL_CORS_ORIGINS, CATHEDRAL_TTL_DAYS before connecting. You can also paste the ready-made client config above.

Does Cathedral - Persistent Memory for AI Agents require authentication?

Yes - when we probed the endpoint on 2026-09-17, it rejected an unauthenticated MCP initialize; you'll need credentials to connect.

06 · Alternatives to Cathedral - Persistent Memory for AI Agents

Alternatives to Cathedral - Persistent Memory for AI Agents

Maintained memory servers if Cathedral - Persistent Memory for AI Agents isn't the fit.

Pairs well with

Servers that cover what Cathedral - Persistent Memory for AI Agents doesn't - only shown when the pairing reason fits the companion.

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