RxNorm MCP — wraps the NLM RxNav REST API (free, no auth)
Free
1,834 MCP servers
Works with Grok BuildBy pipeworx-io
Science MCP — free science data APIs
Free
ScrapingAnt MCP — wraps the ScrapingAnt web scraping API (scrapingant.com)
Free
Security Feeds MCP.
Free
SecurityTrails MCP — wraps SecurityTrails API (securitytrails.com)
Free
Segment MCP Pack — wraps the Segment Public API (https://api.segmentapis.com).
Free
Semantic Versioning (semver) MCP.
Free
send-that-email MCP — wraps StupidAPIs, keyless: analyze whether you should send that email…
Free
SendGrid MCP — wraps SendGrid v3 API (api.sendgrid.com/v3)
Free
SEO Keywords MCP — search volume & difficulty via DataForSEO Labs (dataforseo.com)
Free
SIMBAD MCP — CDS astronomical object database.
Free
Singapore Government Procurement MCP — GeBIZ tender awards (keyless).
Free
SingStat Table Builder MCP — Department of Statistics Singapore.
Free
Statistical Office of the Republic of Slovenia (SURS) — SiStat PxWeb MCP.
Free
Slack MCP Pack
Free
Smithsonian Open Access MCP.
Free
Swiss National Bank (SNB) data portal MCP. Keyless.
Free
Solscan MCP — Solana block-explorer + network analytics
Free
South Africa Government Procurement MCP — National Treasury eTenders / OCPO (keyless).
Free
Space Feeds MCP.
Free
Spaceflight News MCP.
Free