Deadlatch MCP server

Deadlatch

The pre-trade latch for your trading agent. Advisory-only.

Three things you need to know before anything else:

1. You need an independent, cross-broker gate that you control. If an agent can place orders on your account, the last check between the agent and the broker should not be the agent itself — and it should not be locked to one broker's UI or rules.
2. Deadlatch does not predict, does not recommend, and does not place orders. It answers one question only: is this order allowed right now? It is not a signal generator and it is not a broker.
3. Every answer comes with reasons, evidence, and a local audit record on Linux/macOS. PASS / WARN / BLOCK is never a bare verdict — you can see which rule hit, why, and what was evaluated. Durable audit writes (init / append / repair / prune / shadow report) are supported on Linux and macOS only. On Windows the package still imports, and the rule engine / Guard / CLI / MCP still compute decisions; those write paths fail closed with auditplatformunsupported. Offline verify / read of a stopped snapshot remain available. Windows MCP is a limited integration path, not a full trusted audit chain.

Honest boundary (please read): Deadlatch is advisory. It cannot force an agent that never calls it to call it, and it cannot stop an agent that ignores a BLOCK from submitting the order somewhere else. Whether the agent calls the guard and honors the result is the integrator's decision. Do not rely on this tool as a guarantee against loss — it is a gate, not an insurance policy.

• License: MIT — see LICENSE.
• 中文文档: README.zh-CN.md
• Security: SECURITY.md · Contributing: CONTRIBUTING.md · Disclaimer: DISCLAIMER.md

Start here

<!-- mcp-name: io.github.Diabloluo/deadlatch -->

The current install path is the verified PyPI deadlatch==0.1.1. This source tree is unreleased candidate 0.1.2; it is not published.

pip install deadlatch==0.1.1

The published MCP Registry name is io.github.Diabloluo/deadlatch at version 0.1.1.

MCP-first start:

uvx --from deadlatch==0.1.1 deadlatch-mcp --policy policy.yaml --portfolio portfolio.json

--policy and --portfolio are required local files. --audit-path and --kill-switch-path are optional. Use fictional or your own simulated inputs only. Deadlatch is advisory-only: it never places orders and cannot stop an agent that never calls it. Option orders must use the broker's unique full contract code as symbol. A historical GitHub pre-release remains at v0.1.0.dev1; it is not the current install path.

Then:

1. Run a fictional-data Quick Start below (Python, CLI, or MCP) on Linux or macOS. Confirm PASS → BLOCK → local audit. Windows can import the package and run rule computation; it is not the audit-write Quick Start.
2. Request a 20-minute integration assessment only if you already have an order-intent or simulated execution path: open the assessment form.

That GitHub issue is public. Do not paste accounts, positions, orders, API keys, tokens, customer names, or private paths. Security defects must go through GitHub Security Advisories, not a public issue.

Quick Start (60 seconds each)

All three quick starts use fictional data and a temporary audit path. They are executed from the same source scripts by the test suite, so they cannot drift from the documentation. Full audit-write / MCP Quick Start requires Linux or macOS. Windows may import the library and evaluate rules; it will not initialize or append a durable audit collection.

1. Python API

Shortened. The full README is on GitHub.