Persistent memory and drift detection for AI agents across session restarts.
Connect Cathedral — Persistent Memory For AI Agents to Claude, Cursor or any other MCP client and it stops being a tab you switch to. Persistent memory and drift detection for AI agents across session restarts. The cathedral — persistent memory for ai agents mcp server is what makes that connection.
c = Cathedral(api_key="cathedral_...") context = c.wake() # full identity reconstruction c.remember("something important", category="experience", importance=0.8) ```
The toolset is worth reading before you wire it up, because it tells you what the integration is really for:
Method — EndpointPOST — /registerGET — /wakeConfiguration is passed through the environment: CATHEDRAL_API_KEY, CATHEDRAL_CORS_ORIGINS, CATHEDRAL_TTL_DAYS. Treat anything key-shaped as a real credential — scope it to the minimum the server needs, and rotate it if it ever lands in a shared config.
Because this one is hosted, setup is mostly authentication — you point your client at the endpoint and approve access. Nothing runs on your machine, so there is no runtime to keep patched.
Plenty of knowledge and memory servers cover similar ground. The differences that matter in practice are scope of access and how much setup stands between you and a working tool call. Cathedral — Persistent Memory For AI Agents's toolset — Method, POST, GET — is a fair guide to whether it matches your workflow. It is maintained by AILIFE1; worth a glance at recent repository activity before you build anything load-bearing on it.
We check each listing at SyncDev against the project's documentation before it goes live — if something here drifts out of date, it is a bug worth reporting.
| Tool | What it does |
|---|---|
| Method | Endpoint |
| POST | /register |
| GET | /wake |
Add to `~/.claude/settings.json`:
```json
{
"mcpServers": {
"cathedral": {
"command": "uvx",
"args": ["cathedral-mcp"],
"env": { "CATHEDRAL_API_KEY": "your_key" }
}
}
}Configuration as documented by the project. Restart the client after saving.
| Variable | Description | Required |
|---|---|---|
| CATHEDRAL_API_KEY | Credential the server authenticates with. | Yes |
| CATHEDRAL_CORS_ORIGINS | Configuration value read at startup. | Optional |
| CATHEDRAL_TTL_DAYS | Configuration value read at startup. | Optional |
A knowledge graph your assistant keeps between sessions — entities, relations and observations that persist.
Kill hallucinated APIs — version-accurate, up-to-date library documentation injected straight into context.
Your workspace, on speaking terms with AI — search, read and write Notion pages and databases.
A structured scratchpad for hard problems — stepwise reasoning with revisions, branches and visible logic.
Symbol-level code navigation, refactoring and memory for coding agents — the IDE brain your assistant has been missing.
Chat with your second brain — search, read and write vault notes through the Local REST API.