MCP servers for Codex CLI

USPS state code MT.

USPS state code NY.

USPS state code RI.

USPS state code WA.

USPS state code WI.

US tariff & trade truth: duty actually paid by origin/HS 2017+, HTS rulebook, CBP rulings. No key.

Find the right US tariff code for a product and the duty rate that actually governs it.

Federal tax estimate, deadlines, FBAR/8938/3520 checks, §7702 screen, inherited-stock step-up.

US Army Corps of Engineers water data: reservoir and river levels, project lists and time series.

Plan OpenAI Codex usage from local quota, banked resets and extra-reset forecasts.

Sniff and reverse-engineer a car's LIN bus: capture, changing bits, speed detect, LDF decode

Drive 12 hobby servos on an open-hardware USB-C controller: moves, poses, sequences, rail current

USDA AMS Market News -- Livestock Mandatory Price Reporting (LMR).

Real estate market intelligence, calculators, and capital advisory for US investors.

Parse user-agent strings into browser, engine, OS and device, and flag crawlers - fully local.

Explore your Userbrain user test data, summarize feedback, and uncover actionable insights faster.

The top conversion fix from real visitor sessions, with file and line, checked after you ship.

USGS earthquakes: latest quakes and queries by magnitude, count and start time.

Search USITC tariff schedules, inspect heading trees, and look up published duty rates.

Sun rise and set, moon phases, twilight times and the seasons from the US Naval Observatory.

USPTO patent prosecution history: office action full text, examiner citations, claim-level…