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) — also works for Claude Desktop, Windsurf, Cline, Continue, Goose, and Zed with their respective config files:

{
  "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, if npx does not start directly, use "command": "cmd", "args": ["/c", "npx", "-y", "knowmind", "mcp"].

npx -y knowmind install <ide> writes this configuration for you (e.g. claude, cursor, vscode), and npx -y knowmind init sets up automatic memory hygiene — recall before each task, store after each meaningful change — for clients with a hook or rule mechanism (Claude Code, Cursor).

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

| Tier | Price | For whom | |---|---|---| | Free | €0 | individuals and evaluation | | Pro | €15/month or €150/year | individual professionals | | Team | €99/month | teams with shared memory | | Business | €349/month | larger teams | | Enterprise | from €1,000/month | organizations with on-premise requirements |

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):

| Product | Free tier | First paid tier | Self-hosting | |---|---|---|---| | knowmind | 2,500 memories | €15/month | no (Enterprise on-premise option) | | Mem0 | 10,000 entries, 1,000 retrievals/month | $19/month | yes (Apache-2.0) | | Zep | 10,000 credits/month | $125/month | Graphiti open source; Zep as BYOC | | cognee | 1M tokens, 1 workspace | $2.50 per 1M tokens | yes | | Letta | limited agents, own keys | $20/month | yes (per vendor) | | Supermemory | ~$5 usage included | $19/month | from Scale tier |

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

Available Tools

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

Reading

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

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

knowmind_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. 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_entity — Create or update a typed entity (a person, a company, a product) with aliases. name (string, required) · entity_class (string, required — see knowmind_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 — 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_schema) · confidence (number 0–1) Usage: connect a contract to the client it belongs to. The inverse edge is created for you.

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

On deleting

There is no delete tool, and that is deliberate. Facts are superseded (knowmind_update_fact), edges are removed (knowmind_unlink), 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.

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.