Deadends Dev MCP server

What it does

This server provides structured data about known failure patterns in two areas: coding errors (2,089 entries across 51 domains) and country-specific real-world rules and cultural constraints (250+ entries across 52 countries). It helps AI agents avoid repeating failed approaches and making culturally or legally inappropriate suggestions by returning deterministic, primary-sourced answers instead of hallucinated guidance.

• Stop an AI agent from suggesting a failed code fix like `sudo pip install` by querying the dead end database and getting the failure rate and correct workaround.
• Prevent an agent from giving culturally inappropriate advice, such as suggesting tipping in Japan or public displays of affection in the UAE, by checking country-scoped legal and cultural dead ends.
• Trace error chains to understand that error A leads to error B 78% of the time, allowing an agent to anticipate and handle related failures together.

Tools this server exposes

Tool	Does
query_deadend	Search the dead end database by error type, domain, slug, or country code to retrieve known failure patterns, workarounds, and success rates.
list_domains	Return all available code and country domains currently covered in the database.
get_country_deadends	Retrieve all dead ends scoped to a specific country code, including legal, cultural, and practical constraints.
report_outcome	Submit real outcome data to update fix success rates and help improve the database.

Before you enable it

An MCP server runs with whatever access you give it. Start with a development account rather than production, and check which tools the server exposes before you let an agent call them unattended.