Open-source · MCP memory server · Apache-2.0

Sovereign memory for your MCP agents.

A self-hostable, production-grade memory server for MCP: row-versioned concurrent writes, principal-derived isolation, full audit. Runs in your own Postgres, and never phones home.

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kosha · कोश: a sheath, a layer. Memory, held in living layers.
preview · coming soon 
# run Kosha against your own Postgres
services:
  kosha:
    image: ghcr.io/kosha-mcp/kosha:latest
    ports: ["7070:7070"]
    environment:
      DATABASE_URL: postgres://…@db:5432/kosha
    restart: unless-stopped
// point your MCP client at Kosha
{
  "mcpServers": {
    "kosha": {
      "url": "http://localhost:7070"
    }
  }
}
Why Kosha
⇄

Writes that never clobber

Two-call commits guarded by a row-version. No lost updates, even under heavy concurrency.

⊟

Isolation by default

Access is principal-derived: every caller sees only its own memory. No manual scoping, no leaks.

≫

Pagination that holds

Opaque, spec-compliant cursors. Stable across writes, with no internals leaked to the client.

▤

One scoped table

One table with a scope enum, not a schema you outgrow. Simple to reason about, simple to operate.

And the essentials, done properly: an audit log with diffs · quotas & rate limits.
How it fits
Your MCP agents Claude · Cursor · custom Kosha row-version guard principal-scoped · audited Your Postgres your infrastructure MCP SQL
Self-hosted by default: runs on your infrastructure, against your own database. No external telemetry; it never phones home.
Writes that never clobber, proven
1 propose client → write 2 version Kosha → row_version v 3 commit · v client confirms with v ⚷ version guard match → write ✓ stale → reject ⟲
Two calls, one guard: a write commits only if the row-version is unchanged. A stale writer is rejected, never silently lost.
Built to be trusted
Apache-2.0 Self-hostable MCP-spec compliant GDPR / DPDP / CCPA-ready Backups & PITR Circuit breakers Observability built in

Run it yourself, or let us host it.

Hosted Kosha is on the way. Leave your email and we'll tell you the moment it's ready.

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