Hypermnesia MCP

Memory for AI coding agents that you can hold accountable. Keep decisions, fixes and project context between sessions, and inspect what was retrieved. It runs locally over stdio via the published package.

People who work with agent memory system, causal inference and cognitive architecture and want it reachable from Claude, Cursor, VS Code, or another MCP client. The project is written in Python.

VERIFIED ACTIVE

LAST COMMIT 2026-09-17 · ★ 73 · #29 OF 304 MAINTAINED MEMORY · VERIFIED 2026-09-18

MIT · Python servers · how we verify → /methodology

01 · Install Hypermnesia MCP

before you install - you'll need

Set CORTEX_MEMORY_STORE_BACKEND before connecting.

Claude Code

claude mcp add cdeust-cortex -- uvx hypermnesia-mcp

Claude Desktop / Cursor / VS Code - add to config

{
  "mcpServers": {
    "cdeust-cortex": {
      "command": "uvx",
      "args": [
        "hypermnesia-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

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

license MIT - declared in the repository

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

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

03 · What Hypermnesia MCP can do

Prose above is summarized from the project's README and registry record - no invented capabilities.

Latest releases

v4.23.0 · 2026-09-17

4.23.0 (#609) · read Codex rollouts, write the session log before consolidating (#610) (#610) · normalise Codex hook events into what the lifecycle hooks read (#608) (#608) · anchor .Codex/ to repo root, report outside…

v4.22.0 · 2026-09-15

4.22.0 (#570) · remove os/pathlib from ablation.py and 8 retrieval env-flag modules (#560, 2/3) (#568) · remove os/pathlib from wiki_coverage cluster (#560, 3/3) (#569) · remove pathlib from abstention_gate and…

v4.21.0 · 2026-09-10

4.21.0 (#556) · the decision gate judges every language, test file and header (ADR-1060 revision, no exception) (#555) · deliver zetetic-team-subagents v2.41.0 (#554) · deliver zetetic-team-subagents v2.40.1 (#553)…

04 · Who maintains Hypermnesia MCP

hypermnesia-mcp is maintained by cdeust. We track 6 MCP servers from cdeust - 5 actively maintained, 91 combined GitHub stars, oldest repo from Mar 2026. Full record: all servers from cdeust.

  1. hypermnesia-mcp-viz Read-only visualization for Cortex memory, knowledge, sessions, traces, and codebase graphs. ★ 4
  2. automatised-pipeline Codebase intelligence MCP server - index any repo into a property graph; 26 tools for agents. ★ 4
  3. ai-architect-mcp-codebase Codebase intelligence MCP - index any repo into a property graph; 26 tools for agents. ★ 4
  4. ai-architect-mcp-spec PRD verification and host-driven generation with multi-judge consensus across 17 MCP tools. ★ 3

05 · Facts

repository
github.com/cdeust/cortex
website
https://ai-architect.tools/
category
memory - ranked #29 of 304 actively-maintained memory servers as of 2026-09-18.
release cadence
10+ releases in the last 90 days (latest 2026-09-17)
registry
io.github.cdeust/hypermnesia-mcp (active, first published 2026-07-22 · 9 versions)
packages
pypi:hypermnesia-mcp

06 · Hypermnesia MCP FAQ

What is Hypermnesia MCP?

Memory for AI coding agents that you can hold accountable. Keep decisions, fixes and project context between sessions, and inspect what was retrieved. It runs locally over stdio via the published package.

Is Hypermnesia MCP still maintained?

Yes - as of 2026-09-18, its last commit was 2026-09-17 and it shipped 10+ releases in the last 90 days. We re-verify nightly.

How do I install Hypermnesia MCP?

Run `uvx hypermnesia-mcp`. The README documents one environment variable (CORTEX_MEMORY_STORE_BACKEND) to set first. Set CORTEX_MEMORY_STORE_BACKEND before connecting. You can also paste the ready-made client config above.

Does Hypermnesia MCP run locally?

Yes - it's a stdio server: it runs on your machine (via uvx) with your user's permissions. Your data stays local unless the server itself calls external APIs.

07 · Alternatives to Hypermnesia MCP

Alternatives to Hypermnesia MCP

Maintained memory servers if Hypermnesia MCP isn't the fit.

  1. Codebase Memory Codebase knowledge graph for AI agents - 162 languages, sub-ms queries, 99% fewer tokens. ★ 43,715 · 2026-09-18
  2. Superlog Open-source agent that observes and fixes your application. Query logs, traces, metrics, incidents. ★ 1,449 · 2026-09-17
  3. Tradememory Protocol Tamper-evident decision audit trail and outcome-weighted memory for AI trading agents. ★ 1,419 · 2026-09-14
  4. Persome Local-first personal memory and model server for trusted MCP agents on macOS. ★ 1,322 · 2026-08-21
  5. Neo4j Memory MCP Neo4j Knowledge Graph Memory Server ★ 984 · 2026-09-09
  6. Projectmem Coding agent memory - one local MCP server for every project. Warns before repeating failed fixes. ★ 826 · 2026-09-15

Pairs well with

Servers that cover what Hypermnesia MCP doesn't - only shown when the pairing reason fits the companion.

  1. Server Filesystem → filesystem companion filesystem · ★ 39,038
  2. Pdf MCP → filesystem companion filesystem · ★ 135

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