certified-mcp

Give your agent something it cannot talk its way past.

An MCP server exposing certificate verification, equivalence proving, and pre-registration sealing as tools. An agent that edits a design, a proof, or a benchmark config has no way to check its own work — so it reports success. These tools return a verdict re-derived from the artifact, not asserted about it.

Install

pip install "certified-mcp @ git+https://github.com/nickharris808/certified-mcp.git@main"

Not on PyPI yet. The name certified-mcp is unregistered, so pip install certified-mcp installs nothing today — use the line above, which installs exactly the same code. When the package is published this note goes and the plain name works.

Its four dependencies are declared as git references, so that one line pulls them too.

Related MCP server: agent-gate

30-second quickstart

Add to your MCP client config (Claude Desktop, Cursor, or any MCP host):

{
  "mcpServers": {
    "certified": { "command": "certified-mcp" }
  }
}

Then ask your agent something it would otherwise have to guess at:

"I refactored this adder. Prove it's still equivalent to the original."

prove_equivalence(inputs=["a","b"], circuit_a=[...], circuit_b=[...])
-> {"verdict": "EQUIVALENT", "receipt_verifies": true}

Or, when it isn't:

-> {"verdict": "COUNTEREXAMPLE", "counterexample": {"1": true, "2": false}}

The agent gets a concrete failing input, not "this appears correct."

Tools

Why an agent benefits specifically

Three failure modes this addresses directly:

1. Confident wrongness. An agent that refactors logic will say it preserved behaviour. prove_equivalence returns a counterexample input when it didn't.

2. Moving the goalposts. An agent tuning against a benchmark will quietly relax the threshold. seal_criteria before the run makes that detectable — including by the agent itself.

3. Trusting a proof it was handed. check_drat accepts proofs from any solver and re-checks every lemma, so a fabricated proof is caught rather than cited.

Everything here is local and read-only

No network. Nothing uploaded. No telemetry. Every tool either reads a file you name or computes over arguments you pass.

None of these tools can produce a manufacturing certificate — only check one. That asymmetry is deliberate and is enforced by a test. Checking is cheap and should be everywhere; producing a certificate worth checking requires the certification engine, which is a separate closed product.

Implementation

Standard library only, MCP stdio protocol, ~300 lines. You can read the whole server before deciding to run it — which, for something you are wiring into an agent with filesystem access, you should.

Licence

Apache-2.0.

Honest scope — what these tools prove, and what they do not

The rest of the toolkit

A recorded verdict is a claim to be checked, never an input to be trusted. Nine repositories are built on it.

The whole story, and the objections answered, live at certified-oss — start there if this is the first one you have opened.

Try it now, no install: 🔏 the verifier Space · Browse the forgeries: 📊 the atlas dataset

Where the free edition stops

Everything here checks. None of it produces a certificate that is physically meaningful — that needs sound enclosures over real process models, which is a separate commercial product. If you need certificates rather than a way to check them, that is the conversation to have.

Documentation

• PERFORMANCE.md — measured, including what was not optimised

• CONTRIBUTING.md — Contributing

Portfolio-wide: Tutorial · Concepts · FAQ · Architecture · API reference

Licence, citation, contributing

Apache-2.0 — see LICENSE. If you use this, please cite it: CITATION.cff.

The most valuable contribution is a forgery this project fails to catch — see CONTRIBUTING.md and the portfolio-wide guide.

A recorded verdict is a claim to be checked, never an input to be trusted.

certified-mcp is one of nine repositories built on that. The whole story, and the objections answered, live at certified-oss — start there if this is the first one you have opened.