Cross-tool memory for your AI that recalls first every turn and admits when it doesn't know.
Cross-tool memory for your AI that recalls first every turn and admits when it doesn't know. Exposed over MCP by the ultramemory mcp server, that capability becomes something an assistant can invoke while it works, not something you go and do afterwards.
One memory across Claude Code, Claude Desktop, claude.ai, Cursor, ChatGPT, Perplexity, Gemini CLI, OpenClaw, and Hermes. Recalls first every turn — and is honest enough to say "I don't know" instead of making things up.
Everything the assistant can do here goes through one of these:
memory_recall — readrecall_gated — readrecall_verified — readsearch — readfetch — readplaybook_recall — readmemory_write — writememory_feedback — writeplaybook_write — writeYou will need one environment variable: ULTRAMEMORY_API_KEY. The server will not start without them, which is usually why the tools fail to appear on a first run. Keep credentials in your client's env block or a secrets manager rather than in a file you might commit.
Being a remote server, there is no local install. You register the endpoint with your client, authorise it once, and the tools appear.
This sits in the knowledge and memory group, where several servers overlap in what they claim to do but differ sharply once you actually set them up. UltraMemory's toolset — memory_recall, recall_gated, recall_verified and 6 more — is a fair guide to whether it matches your workflow. It is maintained by LogicLabsAI; 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We check each listing at SyncDev against the project's documentation before it goes live — if something here drifts out of date, it is a bug worth reporting.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 |
|---|---|
| memory_recall | read |
| recall_gated | read |
| recall_verified | read |
| search | read |
| fetch | read |
| playbook_recall | read |
| memory_write | write |
| memory_feedback | write |
| playbook_write | write |
| Variable | Description | Required |
|---|---|---|
| ULTRAMEMORY_API_KEY | Credential the server authenticates with. | Yes |
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.