MemPalace

Free, open-source long-term memory system for AI assistants, with an MCP server so agents can save and recall what they learned.

💭 Memory & reasoning59,654Updated 2026-10-20By MemPalaceLicense: MITAuth: Not checked yetGitHub ↗

Found viaGitHubGitHub search: popular MCP / skills repos (★ 59,654 on 2026-10-20)

Test results

Last passed 2026-10-22

Claude CodePassed2026-10-22 · install, connect, tools, agent taskTested with Claude Code 2.1.296 · mempalace 3.11.0 · connected in 3.5s

CursorPassed2026-10-22 · install, connect, tools, agent taskTested with Cursor CLI 2026.10.19-6bbf2c4 · mempalace 3.11.0 · connected in 1.4s

Claude DesktopNot tested yet—

ChatGPT (Codex)Passed2026-10-22 · install, connect, tools, agent taskTested with Codex CLI 0.162.0-alpha.17.2 · mempalace 3.11.0 · connect time not recorded

Server package tested: mempalace 3.11.0 (uv, Python 3.12.15; resolved 2026-10-22)

Direct and key dependencies as resolved: anyio 4.15.1 · chromadb 1.5.9 · httpx 0.28.1 · huggingface_hub 2.2.0 · numpy 2.5.4 · pydantic 2.14.1 · pydantic-settings 2.16.1 · pydantic_core 2.50.1 · python-dateutil 3.0.0 · PyYAML 6.0.3 · tokenizers 0.23.3 · typing_extensions 4.16.0 · uvicorn 0.54.0

All 85 resolved dependencies

aiohappyeyeballs==2.7.1
aiohttp==3.14.5
aiohttp-retry==2.9.1
aiosignal==1.4.0
annotated-doc==0.0.5
annotated-types==0.8.0
anyio==4.15.1
attrs==26.1.0
bcrypt==5.0.0
build==1.6.1
certifi==2026.10.19
charset-normalizer==3.5.2
chromadb==1.5.9
click==8.5.0
durationpy==0.11
filelock==4.2.4
flatbuffers==25.12.19
frozenlist==1.8.0
fsspec==2026.9.0
googleapis-common-protos==1.75.5
grpcio==1.84.1
h11==0.16.0
hf-xet==1.7.0
httpcore==1.0.9
httpcore2==2.16.0
httptools==0.9.0
httpx==0.28.1
httpx2==2.16.0
huggingface_hub==2.2.0
idna==3.20
importlib_resources==7.1.0
jsonschema==4.26.0
jsonschema-specifications==2025.9.1
kubernetes==37.0.1
markdown-it-py==4.2.0
mdurl==0.1.2
mmh3==5.3.1
multidict==7.1.0
numpy==2.5.4
oauthlib==4.0.0
onnxruntime==1.31.0
opentelemetry-api==1.45.1
opentelemetry-exporter-otlp-common==0.66b1
opentelemetry-exporter-otlp-proto-common==1.45.1
opentelemetry-exporter-otlp-proto-grpc==1.45.1
opentelemetry-proto==1.45.1
opentelemetry-sdk==1.45.1
opentelemetry-semantic-conventions==0.66b1
orjson==3.13.0
overrides==7.7.0
packaging==26.3
propcache==0.5.4
protobuf==7.36.2
pybase64==1.5.1
pydantic==2.14.1
pydantic-settings==2.16.1
pydantic_core==2.50.1
Pygments==2.21.0
PyPika==0.51.1
pyproject_hooks==1.3.3
python-dateutil==3.0.0
python-dotenv==1.2.4
PyYAML==6.0.3
referencing==0.37.0
requests==2.34.2
requests-oauthlib==2.0.0
rich==15.0.0
rpds-py==2026.9.1
shellingham==1.5.4
six==1.17.0
tenacity==9.2.1
tokenizers==0.23.3
tqdm==4.70.1
truststore==0.10.5
typer==0.27.3
typing-inspection==0.4.4
typing_extensions==4.16.0
tzdata==2026.5
urllib3==2.8.0
uvicorn==0.54.0
uvloop==0.23.0
watchfiles==1.3.0
websocket-client==1.9.2
websockets==17.3
yarl==1.25.1

Captured with: uvx --from mempalace python (importlib.metadata in the same uvx env; equivalent to uv pip freeze).

Full result per app: Does it work with Claude Code? · Does it work with Cursor? · Does it work with ChatGPT (Codex)?

Protocol: starts, 47 tools listed · 2026-10-22 · connected in 1.9s

🧪 Test-box note: Published install is `pip install mempalace` then the `mempalace-mcp` command; the box runs the same package through uvx. Palace data kept in the harness sandbox (MEMPALACE_PALACE_PATH).

Real test

Passed

One run from our records. When two runs share a date, we show a failure if there is one.

Client

ChatGPT (Codex) · Codex CLI 0.162.0-alpha.17.2

Date

Oct 22, 2026

The task we gave

Using only the mempalace MCP tools, save this so it can be found in a later session: the toolpassed test code is TP-CD7ADF. Reply 'stored' when done.

Using only the mempalace MCP tools, look up the toolpassed test code that was saved in an earlier session and reply with it.

What it promised

details not recorded for this run

What happened

Tool calls:

mempalace:mempalace_searchmempalace:mempalace_search

Other calls recorded:

mempalace:mempalace_add_drawer

Tool result

{"content": [{"type": "text", "text": "{\n  \"error\": \"Media and code task search require embedding_model='embeddinggemma2'\",\n  \"hint\": \"Use the isolated embeddinggemma2 palace and compatible indexes.\"\n}"}], "structured_content": null}

Agent reply

The toolpassed test code is **TP-CD7ADF**.

Verdict

Passed

Install

claude mcp add mempalace -- uvx --from mempalace mempalace-mcp

Run in your terminal. This exact command is what our harness runs in Claude Code; see the results above.

{
  "mcpServers": {
    "mempalace": {
      "command": "uvx",
      "args": [
        "--from",
        "mempalace",
        "mempalace-mcp"
      ]
    }
  }
}

Save as .cursor/mcp.json. This exact config is what our harness runs in Cursor; see the results above.

{
  "mcpServers": {
    "mempalace": {
      "command": "uvx",
      "args": [
        "--from",
        "mempalace",
        "mempalace-mcp"
      ]
    }
  }
}

Add to claude_desktop_config.json and restart Claude Desktop. Tested on the Linux beta; see the results above.

[mcp_servers.mempalace]
command = "uvx"
args = ["--from", "mempalace", "mempalace-mcp"]

Add to ~/.codex/config.toml (shared by the ChatGPT (Codex) CLI and the ChatGPT desktop app; Codex runs inside the ChatGPT desktop app). Tested with the ChatGPT (Codex) CLI bundled in the ChatGPT desktop app; see the results above.

Not connecting? Troubleshooting: Claude Code · Cursor · Claude Desktop · ChatGPT (Codex)

Test history

Date	Check	Result	Versions tested
2026-10-22	Protocol (direct stdio)	Protocol: starts, 47 tools listed	mempalace 3.11.0 · server reported v3.11.0
2026-10-22	Claude Code	Passed install, connect, tools, agent task	Claude Code 2.1.296 · mempalace 3.11.0
2026-10-22	Cursor	Passed install, connect, tools, agent task	Cursor CLI 2026.10.19-6bbf2c4 · mempalace 3.11.0
2026-10-22	ChatGPT (Codex)	Passed install, connect, tools, agent task	Codex CLI 0.162.0-alpha.17.2 · mempalace 3.11.0

Tools seen by our harness (47)

mempalace_statusmempalace_list_wingsmempalace_list_roomsmempalace_get_taxonomymempalace_get_aaak_specmempalace_kg_querymempalace_kg_addmempalace_kg_invalidatemempalace_kg_supersedemempalace_kg_timelinemempalace_kg_statsmempalace_traversemempalace_find_tunnelsmempalace_graph_statsmempalace_mesh_peersmempalace_create_tunnelmempalace_list_tunnelsmempalace_delete_tunnelmempalace_list_hallwaysmempalace_delete_hallwaymempalace_follow_tunnelsmempalace_searchmempalace_check_duplicatemempalace_add_drawermempalace_checkpointmempalace_delete_drawermempalace_delete_drawersmempalace_minemempalace_delete_by_sourcemempalace_syncmempalace_get_drawermempalace_get_drawersmempalace_list_drawersmempalace_update_drawermempalace_diary_writemempalace_diary_readmempalace_hook_settingsmempalace_memories_filed_awaymempalace_reconnectmempalace_event_appendmempalace_task_createmempalace_event_listmempalace_event_waitmempalace_event_ackmempalace_artifact_putmempalace_artifact_getmempalace_patch_submit