MCP servers for Codex CLI

Materials MCP — computed (DFT) materials structures & thermodynamic properties.

MBTA MCP — Boston real-time transit via the MBTA v3 API (api-v3.mbta.com)

Medical codes MCP.

MedlinePlus MCP — NIH consumer health info

mempool.space MCP — Bitcoin block explorer + mempool/fee stats

mercury-number MCP — wraps StupidAPIs (keyless — no credential needed)

NLM MeSH (Medical Subject Headings) MCP.

Meteors MCP — NASA fireball, near-Earth asteroid, and close approach data

Meteostat MCP — historical weather from 11k+ stations (no auth)

MFAPI.in MCP — Indian mutual-fund NAV (net asset value) data.

MIME type lookup MCP.

Mojang/Minecraft MCP.

Moldova Government Procurement (MTender) MCP — keyless.

MyChem.info MCP.

MyHealthfinder MCP — U.S. preventive-services & health-screening guidance

MyVariant.info MCP. Aggregated human genetic-variant annotation: dbSNP, ClinVar clinical…

Nansen Smart Money MCP — on-chain smart-money labels & flows (nansen.ai)

NASA MCP — wraps NASA Open APIs (api.nasa.gov)

NASS MCP — USDA National Agricultural Statistics Service (Quick Stats)

Narodowy Bank Polski (National Bank of Poland) Web API MCP. Keyless.

National Bank of Ukraine (NBU) public statistics MCP. Keyless.