Fidelis Memory MCP Server

83.2% R@1 in a checked-in 470-question LongMemEval-S retrieval run. A separate checked-in run answered 317 of 434 graded questions correctly (73.0%, Wilson 95% CI [68.7%, 77.0%]) with an LLM reading Fidelis retrieval. The default retrieval path itself makes no LLM call. It runs locally over stdio via the published package.

People who work with rag, retrieval and fidelity and want it reachable from Claude, Cursor, VS Code, or another MCP client. The project is written in Python.

VERIFIED ACTIVE

LAST COMMIT 2026-09-18 · ★ 23 · #73 OF 304 MAINTAINED MEMORY · VERIFIED 2026-09-18

MIT · Python servers · how we verify → /methodology

01 · Install Fidelis Memory

before you install - you'll need

Set COGITO_OLLAMA_URL before connecting.

Claude Code

claude mcp add hermes-labs-ai-fidelis -- uvx fidelis-memory

Claude Desktop / Cursor / VS Code - add to config

{
  "mcpServers": {
    "hermes-labs-ai-fidelis": {
      "command": "uvx",
      "args": [
        "fidelis-memory"
      ]
    }
  }
}

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 fidelis-memory - check the name against the project README before installing (PyPI has no namespace ownership)

registry namespace io.github.hermes-labs-ai is GitHub-verified and matches the repo owner

03 · What Fidelis Memory can do

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

Latest releases

v0.1.0 · 2026-09-13

Promote Fidelis Memory from the 0.0.x sequence to its first minor release. · The supported product contract is local-first, verbatim memory retrieval for · Codex, Claude Code, GitHub Copilot CLI, Gemini CLI, and…

v0.0.97 · 2026-09-12

Release the Gemini CLI extension: v0.0.96 was tagged before · gemini-extension.json landed, so the bare-URL install resolved the latest · GitHub release and failed with "Configuration file not found". v0.0.97 is the…

v0.0.95 · 2026-09-02

publish Fidelis 0.0.95 through MCP Registry

04 · Who maintains Fidelis Memory

Fidelis Memory is maintained by hermes-labs-ai. We track 2 MCP servers from hermes-labs-ai - 2 actively maintained, 24 combined GitHub stars, oldest repo from Mar 2026.

05 · Facts

repository: github.com/hermes-labs-ai/fidelis
website: https://github.com/hermes-labs-ai/fidelis
category: memory - ranked #73 of 304 actively-maintained memory servers as of 2026-09-18.
release cadence: 7 releases in the last 90 days (latest 2026-09-13)
registry: io.github.hermes-labs-ai/fidelis-memory (active, first published 2026-09-02 · 4 versions)
packages: pypi:fidelis-memory

06 · Fidelis Memory FAQ

What is Fidelis Memory?

Is Fidelis Memory still maintained?

Yes - as of 2026-09-18, its last commit was 2026-09-18 and it shipped 7 releases in the last 90 days. We re-verify nightly.

How do I install Fidelis Memory?

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

Does Fidelis Memory 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 Fidelis Memory

Alternatives to Fidelis Memory

Maintained memory servers if Fidelis Memory isn't the fit.

Pairs well with

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

More memory MCP servers · Cogmemai · Google Knowledge Graph · Memex (iamtouchskyer) · Mem Authority · Infranodus MCP Server Infranodus

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