Knowmind

knowmind

Persistent memory for your AI tools. Store something once, and it is available in Claude Code, Cursor, and any other MCP client that runs a local (stdio) server — as a typed knowledge graph with provenance, confidence, and a bitemporal history for every fact. Hosted in Germany (Hetzner, Nuremberg data center); the CLI and MCP server in this repository are Apache-2.0.

The free tier is permanently free and requires no payment details. The API, CLI, and MCP server are included in every tier.

· knowmind.de

Connect your AI tool in three steps

1. Create a free account at knowmind.de and generate an access token: Dashboard → API tokens.
2. Store the token locally:

npx -y knowmind login --token kmt_xxxxxxxx

3. Wire up your client:

Claude Code (one command)

claude mcp add knowmind --env KNOWMIND_TOKEN=kmt_xxx -- npx -y knowmind mcp

Cursor (~/.cursor/mcp.json) — the same mcpServers block works for Claude Desktop, Windsurf and Gemini CLI in their config files; Zed expects it under context_servers:

{
  "mcpServers": {
    "knowmind": {
      "command": "npx",
      "args": ["-y", "knowmind", "mcp"],
      "env": { "KNOWMIND_TOKEN": "kmt_xxx" }
    }
  }
}

Any other MCP client: knowmind is a standard MCP server over stdio (npx -y knowmind mcp). On Windows, npx -y knowmind install <ide> is the better way: if pythonw.exe from Python 3.10 to 3.14 sits in its default location (%LOCALAPPDATA%\Programs\Python\Python3… or C:\Python3…), the entries it writes start the server without a console window; Codex and the printed Claude Code command use npx directly. If you configure by hand and npx does not start directly, use "command": "cmd", "args": ["/c", "npx", "-y", "knowmind", "mcp"]; clients without a console of their own then open a window with each tool call.

npx -y knowmind install <ide> writes this configuration for you, for example cursor, vscode, windsurf, zed, claude-desktop, gemini or codex; npx -y knowmind install list shows all clients. For Claude Code it prints the claude mcp add command instead, and --project writes .mcp.json in the current folder.

Clients that cannot read the token from the environment get a placeholder to replace with your token. Running install again updates only the knowmind entry and keeps a token you entered; before it changes a file, it saves a copy next to it.

npx -y knowmind init sets up memory hygiene in your client: hooks in Claude Code that recall before each task and, when a turn contained something worth keeping (a deploy or commit, a new rule, an architecture decision, changed code or configuration) and nothing was stored yet, ask the model to store it before the turn ends, a rule file in Cursor, and a block in AGENTS.md that tells Codex when to ask knowmind and what to keep.

How knowmind stores facts

• Bitemporal history. Every fact carries two time axes: when it was true and when it was recorded. Corrections never overwrite the original; the old statement stays queryable with the date it stopped being valid, so you can reconstruct what the system knew on any given day.
• Provenance and confidence per fact. New facts require a confidence level and keep a link to their source. Older facts without a confidence level are marked as such.
• Typed knowledge graph. Entities and relations use a restricted set of edge types; catch-all relations are rejected at write time.
• Operated in the EU, isolated per tenant. The service runs on Hetzner in Nuremberg, Germany, with tenant isolation, a public data processing agreement, and a subprocessor list at knowmind.de/legal/avv. Access logs are hash-chained and externally timestamped (RFC 3161).

knowmind is a hosted service; there is no self-hosted community edition. If you need self-hosting, one of the projects below will serve you better. knowmind is built for the people and teams that need an operated memory service with an audit trail in the EU.

Pricing

The free tier includes 2,500 memories, 1 user, and a 30-day access log.

How that compares (vendor pricing pages, checked 2026-09-05):

Details and current prices: knowmind.de/pricing.

Commands

npx -y knowmind search "Where does the staging deploy run?"
npx -y knowmind upload notes.md --title "Meeting notes 2026-05-12"
npx -y knowmind stats
npx -y knowmind health
npx -y knowmind status --line   # one-line status for your AI tool's statusline
npx -y knowmind sync ./openwiki  # pages in Open Knowledge Format keep their review data

Knowledge in Open Knowledge Format

knowmind sync reads folders in the Open Knowledge Format (OKF 0.1 and 0.2), such as the openwiki/ folder that OpenWiki creates in a repository.

Every search hit then carries the page's status (stable if the page sets none), its trust tier as defined by OKF (trust: unverified, machine-confirmed or human-reviewed) and how many sources it lists. If the page provides them, the hit also carries who or what generated the page (generated), its last five verifications (verified), the time after which it counts as stale (stale_after) and its first ten sources (sources). The full header stays part of the document.

Inside a bundle, directory listings (index.md) and logs (log.md) are not imported. knowmind recognizes a bundle by okf_version in its root index.md or by the files OpenWiki keeps there. If it finds neither, --okf treats the folder you sync as a bundle.

Available Tools

Fifteen tools over MCP. Every one works against your own workspace; the server never sees another tenant's data.

Reading

knowmind_recall_memories — Search your memory and get the passages that answer a question, ranked. Combines keyword search, vector similarity and the knowledge graph, then reranks with a cross-encoder. query (string, required) · k (integer, default 5, max 20) · hops (integer, default 2 — how far to follow graph edges from a hit) Usage: your AI tool asks "Which database does the billing service use?" before answering, instead of guessing. Errors: returns an empty result set when nothing matches — never an invented answer.

knowmind_recall_at_time — The same search, but as your memory stood on a given date. Facts superseded after that date are excluded; facts that were valid then are returned even if they are no longer true. query (string, required) · as_of (ISO date or timestamp, required in practice) · k (integer, default 5) Usage: "What was our pricing in March?" — answers from the state of that day, not today's. Difference from knowmind_recall_memories: use recall for what is true now, and recall_at_time for what was true then. Asking recall about the past returns today's facts.

knowmind_list_recent — The most recently added entries, newest first. k (integer, default 10) Usage: a quick look at what landed in memory during this session.

knowmind_list_relations — All typed edges attached to one entry, in both directions. memory_id (string, required) Usage: "What does this contract connect to?" before changing or superseding it. Errors: unknown id returns an error, not an empty list.

knowmind_get_schema — The entity classes and relation types this workspace accepts. No parameters. Usage: call it before knowmind_upsert_entity or knowmind_link_entities to use a type the server will accept, rather than inventing one.

knowmind_list_inferred — Relations that wait for a human decision: relations knowmind inferred from a text, and relations that start from a document although their type needs a person, organisation or similar. Each comes with its review state, both connected entries, its source and the entry that supports it. status (open, confirmed or rejected, optional) · limit (integer, default 50, max 200) · offset (integer, default 0) Usage: review what the graph learned on its own. Open relations do not feed the derivation rules until someone confirms them.

knowmind_get_stats — Size of the corpus: documents, chunks, entities, edges. No parameters.

knowmind_get_health — Whether the service and its stores are reachable. No parameters. Usage: a status line, or a check before a long ingest.

Writing

knowmind_store_memory — Store a short fact, decision or note. Stays as one unit; it is not split. content (string, required) · title (string) · memory_type (string, e.g. semantic, episodic) · tags (array of strings) · source (string) · domain (string) · relations (array — edges to create along with the entry) Usage: "We decided to keep the monolith until Q3" after a meeting. Errors: rejected with 422 when the text contains what looks like a password or an access key. Store a pointer instead, not the secret.

knowmind_upload_document — Store a longer text as a document. It is split into passages, embedded, and becomes searchable through knowmind_recall_memories. content (string, required) · title (string) · source (string) · relations (array) Usage: meeting minutes, a specification, a handbook chapter. Difference from knowmind_store_memory: one sentence you want back verbatim is a memory; a page you want searched is a document. A long text stored as a memory is retrieved as one block, which crowds out other results.

knowmind_update_fact — Supersede a fact that has changed. The old version keeps its validity window and stays auditable; nothing is deleted. target_id (string, required) · new_title (string, required) · new_content (string, required) · update_reason (string) Usage: a price, a deadline or a responsibility changed. Never overwrite — supersede, so "what did we believe in July" stays answerable. Errors: unknown target_id is rejected.

knowmind_upsert_entity — Create or update a typed entity (a person, a company, a product) with aliases. name (string, required) · entity_class (string, required — see knowmind_get_schema) · description (string) · aliases (array of strings) Usage: give "ACME Ltd." its aliases so a question about "ACME" finds it. Errors: a class outside the schema is rejected.

knowmind_link_entities — Create a typed edge between two entries, with a confidence value. from_id (string, required) · to_id (string, required) · rel_type (string, required — see knowmind_get_schema) · confidence (number 0–1) Usage: connect a contract to the client it belongs to. The inverse edge is created for you.

knowmind_unlink_entities — Remove a typed edge. from_id, to_id, rel_type (all required) Usage: an edge created in error. The entries themselves stay.

knowmind_review_inferred — Record a decision on one relation from knowmind_list_inferred. confirm lets it feed the derivation rules; reject ends the relation, its reverse and every relation derived from it (valid_to is set, nothing is deleted); undo takes a rejection back. edge_id (string, required) · decision (confirm, reject or undo, required) · evidence (string, optional — id of the entry that supports the decision) Usage: after reviewing the list. Returns the state before and after and how many reverse and derived relations were affected.

On deleting

There is no delete tool, and that is deliberate. Facts are superseded (knowmind_update_fact), edges are removed (knowmind_unlink_entities), and the history stays auditable. Deleting an entire workspace including its data is a self-service action in the web interface at knowmind.de — it is not something an agent should be able to do by calling a tool.

Older tool names

Seven tools were renamed on 12 September 2026 so that every name follows knowmind_<verb>_<object> and says whether it reads or writes. The previous names keep answering unchanged until 31 March 2027 and still appear in discovery, marked as deprecated:

knowmind_entity became upsert, not get: it creates the node or returns the existing one. Nothing else about the tools changed — same parameters, same behaviour.

Discovery

GET https://knowmind.de/api/mcp/v1 returns name, version, protocol version and the full tool list with input schemas — without a token. Directory crawlers and inspectors can read the complete surface anonymously; only tools/call requires a key.

Links

Documentation · Pricing · Data processing agreement · Privacy

Die deutsche Fassung steht in README.de.md.