Cathedral Mcp

Name: Cathedral Mcp
Author: AILIFE1

by AILIFE1communityv1.1.0

An MCP server that gives AI agents persistent memory across sessions and provides drift detection via cryptographic snapshots. It also includes a wake tool to restore agent context and optional prompt-injection sanitization for stored memories.

From the registry: Persistent memory and drift detection for AI agents across session restarts.

GitHub Repository Website

Install & configure

Prerequisites

optional
Install uv
Install the uv Python package manager/runner to use the recommended `uvx cathedral-mcp` launch method.
```
$ pip install uv
```
https://docs.astral.sh/uv/
required
Get a Cathedral API key
Create a Cathedral account and obtain an API key. This is required for both local and remote usage.
https://cathedral-ai.com/

Install in your client

Paste into the AI you're chatting with — it will figure out the rest

Please install the `cathedral-mcp` MCP server into my current AI client (that's you).

Required prerequisites (do these first if not already done):
- **Get a Cathedral API key** — Create a Cathedral account and obtain an API key. This is required for both local and remote usage. (https://cathedral-ai.com/)

Optional prerequisites:
- Install uv — Install the uv Python package manager/runner to use the recommended `uvx cathedral-mcp` launch method. Run: `pip install uv` (https://docs.astral.sh/uv/)

Canonical MCP server config (stdio transport):
- command: `uvx`
- args: ["cathedral-mcp"]
- required environment variables:
  - `CATHEDRAL_API_KEY`: Your Cathedral API key. (example: `<your-cathedral-api-key>`)
- optional environment variables:
  - `CATHEDRAL_BASE_URL`: API base URL for a self-hosted Cathedral instance. (example: `<your-cathedral-base-url>`)
  - `CATHEDRAL_SANITISE`: Set to `1` to enable prompt-injection sanitisation of memory content. (example: `1`)

Note: README also documents a hosted remote MCP endpoint at `https://cathedral-ai.com/mcp` using the Cathedral API key as bearer/auth token, but the simplest recommended install path for client MCP config is local stdio via `uvx cathedral-mcp`. Self-hosted usage is supported by setting `CATHEDRAL_BASE_URL`.

Add this MCP server to my current client's config in the correct format for you. If you need secrets or credentials I haven't provided, ASK me — do not invent values or leave raw placeholders. After adding it, tell me how to verify the server is connected.

Note: README also documents a hosted remote MCP endpoint at `https://cathedral-ai.com/mcp` using the Cathedral API key as bearer/auth token, but the simplest recommended install path for client MCP config is local stdio via `uvx cathedral-mcp`. Self-hosted usage is supported by setting `CATHEDRAL_BASE_URL`.

Tools (6)

cathedral_wake

Restore full agent identity and session context at startup

cathedral_remember

Store a memory with category, importance, and tags

cathedral_search

Search memories by text or category

cathedral_snapshot

Take a drift snapshot and return a snapshot hash and drift score

cathedral_drift

Get the current drift score versus a baseline

cathedral_me

Get the agent profile

Environment variables

CATHEDRAL_API_KEYrequiredYour Cathedral API key used to authenticate requests

CATHEDRAL_SANITISESet to 1 to enable injection filtering for memory content

CATHEDRAL_BASE_URLAPI base URL for a self-hosted Cathedral instance

Packages

cathedral-mcp

pypiv1.1.0transport: stdio

Remote Endpoints

https://cathedral-ai.com/mcp

type: streamable-http

Details

Language: Python
License: MIT
Released: Apr 12, 2026
Last commit: Jun 3, 2026
Registry name: io.github.AILIFE1/cathedral-mcp

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