Context compression for MCP. Same upstream call, exact results recoverable.
Cut MCP context before it reaches the agent.
76% fewer MCP tokens in our standard benchmark Up to 99.7% in synthetic stress testing Same upstream call. Exact recovery.
MCP Slim Guard reduces Tool catalogs on the Generic surface and eligible oversized results on both surfaces. The Host receives less context. MCP Slim Guard forwards selected arguments unchanged and executes the upstream Tool at most once.
Token reduction Tokens removed Tasks completed Upstream calls --------------: -------------: --------------: -------------: 76.18% 54,381 24/24 24
Current Alpha · local stdio · Node.js 20+
Install · Proof · Hosts · Product page · Contribute · Docs · 中文
Generic runtime demo: 12 Tools → 3 entries · 73,507 characters → compact projection · exact recovery · 1 upstream execution
- Cuts catalog context. The Generic surface exposes findtool, calltool, and readresult. The Native surface preserves authorized original Tool names. - Cuts eligible result context. Slim Guard routes long text, uniform JSON, and logs through local deterministic projectors. - Keeps exact recovery. Every lossy delivery stores one immutable snapshot. readresult reads it without executing upstream again. - Makes trials reversible. analyze, plan, install, profile, and rollback cover the trial from assessment to restoration.
- Catalog projection reduces the Tool definitions loaded by the Generic surface. - Payload routing reduces only result shapes with a safe local strategy. - Result capsules preserve the original result content for bounded recovery. - Fail-open delivery returns the exact upstream resul
From the project README.
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