MCP servers for Codex CLI

US Travel Advisories MCP.

Travelpayouts MCP — wraps the Aviasales Flights Data API (travelpayouts.com)

Trove MCP.

Twelve Data MCP.

Twilio MCP Pack — send SMS, list messages, make calls via Twilio REST API.

ULID MCP.

UNHCR Refugee Data Finder MCP (keyless).

Unicode character MCP.

Unpaywall MCP — open-access lookup for scholarly papers (free, no key)

US News Feeds MCP.

User-Agent parser MCP.

USGS Earthquake Catalog MCP (FDSNWS event API).

USGS Water Services (NWIS) MCP.

UUID validation & generation MCP.

Victoria and Albert Museum (V&A) Collections MCP.

VALORANT reference data MCP (valorant-api.com).

victorian-complaint MCP — wraps StupidAPIs (keyless — no credential needed)

VizieR MCP — CDS astronomical catalogue access.

Watchmode MCP.

Environment and Climate Change Canada (ECCC) GeoMet MCP.

Weather MCP — wraps Open-Meteo API (free, no auth)