MCP servers for Grok Build

Massive (formerly Polygon.io) MCP.

Polymarket MCP — prediction-market data via Gamma + CLOB + Data public APIs.

Islamic prayer times & calendar MCP (Aladhan API). Keyless.

PredictHQ MCP — wraps the PredictHQ Events API (predicthq.com)

ProZorro MCP — Ukraine government procurement (keyless).

PubMed MCP — wraps the NCBI E-utilities API (biomedical literature, free, no auth)

PyPI MCP — wraps the Python Package Index (PyPI) JSON API (free, no auth).

QuickBooks MCP Pack — query customers, invoices, and accounts via QuickBooks Online API.

Quiver Quantitative MCP — alternative-data on public companies (quiverquant.com)

Reactome MCP — open biological pathway knowledge-base.

Real Estate Japan MCP — actual residential/commercial transaction prices and

Regrid MCP — wraps the Regrid Parcel API v2 (regrid.com)

RemoteOK MCP — remote-work job board (tech-heavy), keyless.

Remotive MCP — curated remote-only job board

Repology MCP — cross-distro package version aggregator.

Sveriges Riksbank (Sweden's central bank) SWEA v1 MCP. Keyless.

Riksdagen (Swedish Parliament) open data MCP.

Roblox MCP.

RubyGems MCP — wraps the RubyGems.org public API (free, no auth)

RxNorm MCP — wraps the NLM RxNav REST API (free, no auth)

Sanctions Screening MCP — screen people, companies, vessels, and aircraft