compresh-mcp

MCP server for Compresh — production-grade context compression for LLM agent conversations.

Compresh adds Q-protective ranking, epistemic marker classification, and depth-aware adaptation on top of the open-source tulbase compression core. This is the paid tier distribution.

Architecture (0.2.0+)

• Local: bundled tulbase (MIT, vendored as compresh_mcp.tulbase) runs on every turn for fast compression + cold-storage support (fetch_compressed / list_compressed MCP tools).

• Server: TUL 1.0 layers (Q-protective ranking, epistemic markers, semantic store) run on Compresh infrastructure via the /v1/tul1 endpoint, gated by your Compresh API key + tier.

• Degraded mode: if /v1/tul1 is unreachable, compresh-mcp transparently falls back to the local tulbase result so compression never blocks.

Previously (0.1.0, yanked), TUL 1.0 classifiers shipped inside the client package. That distribution leaked paid features into the local install and is no longer recommended — install 0.2.0 or later. See CHANGELOG.md for the migration note.

Related MCP server: SlimContext MCP Server

What's the difference vs tulbase-mcp?

In Compresh's bench (Compresh-bench v1, 600-turn multi-model), Q-protective ranking adds 5–12 percentage points of equivalence preservation vs base LexRank at the same token savings — Pareto improvement.

Pricing

Every new user: $30 free credit (90-day expiry), $10 minimum top-up (charged $7.50 with a permanent 25% discount on top-ups).

Saving-share is the cut Compresh takes on the savings measured against the user's chosen model. The base value comes from the actual model price (when known) or the provider family's cheapest model; anonymous / free-model usage falls back to a flat $0.20 / 1M saved input tokens.

See compre.sh/pricing for the canonical pricing page.

Installation

pip install compresh-mcp

On first run, you'll be prompted for your Compresh API key. If you don't have an account, your browser opens to compre.sh/signup automatically.

MCP client configuration

Claude Code (~/.claude/mcp.json)

{
  "mcpServers": {
    "compresh": {
      "command": "compresh-mcp",
      "env": {
        "COMPRESH_API_KEY": "sk-comp_...",
        "COMPRESH_API_BASE": "https://api.compre.sh"
      }
    }
  }
}

Cursor (~/.cursor/mcp.json)

Same structure as Claude Code.

Cowork

Cowork → Settings → Tools → MCP servers → Add:

• Command: compresh-mcp

• Environment: COMPRESH_API_KEY=sk-comp_...

Tools exposed

Same four tools as tulbase-mcp, with enhanced behavior:

• compress — Q-protective compression by default (protection_mode="balanced")

• fetch_compressed, list_compressed, stats — same interface

Plus paid-tier extras:

• usage — current cycle budget, free credit balance, savings metrics

License

Business Source License 1.1 — see LICENSE. Production use permitted with valid Compresh API key. License automatically converts to MIT after 4 years (Year 2030).

Patents

Q-protective sentence ranking + Protection Zone are covered by TR-TPMK patent application 2026/007305 (Compresh Ltd, May 2026). A valid Compresh subscription grants implementation license.

Status

v0.1.0 — first public release, May 2026. Active development. APIs may change before v1.0. Issues and pull requests welcome.

Links

• compre.sh — product site

• Documentation — full reference

• GitHub — source

• Issues — bug reports

• tulbase (open core, MIT) — standalone