MCP Servers
Model Context Protocol servers that give AI agents access to tools and data — sourced from the official MCP registry and ranked by GitHub stars.
Reliefweb
ReliefWeb MCP — the UN OCHA humanitarian information service.
Remoteok
RemoteOK MCP — remote-work job board (tech-heavy), keyless.
Rentcast
Rentcast MCP — wraps Rentcast API (api.rentcast.io/v1)
Repology
Repology MCP — cross-distro package version aggregator.
Rescuegroups
RescueGroups.org MCP — adoptable animals and the rescues/shelters that list
Research Chain
One call, one paper: everything openly available around it — full text, license, datasets, code…
Revternal
Revternal MCP — wraps the Revternal Developer Intelligence API
Rhea
Rhea MCP — expert-curated database of biochemical reactions.
Rhode Island Code
Rhode Island General Laws — state statutes by citation.
Rick And Morty
Rick and Morty MCP — wraps the Rick and Morty API (free, no auth)
rickmorty
Rick and Morty MCP — wraps The Rick and Morty API (free, no auth)
Rijksmuseum
Rijksmuseum — the Dutch national museum's collection, via its open Data
Riksbank Se
Sveriges Riksbank (Sweden's central bank) SWEA v1 MCP. Keyless.
Rubygems
RubyGems MCP — wraps the RubyGems.org public API (free, no auth)
Rxnorm
RxNorm MCP — wraps the NLM RxNav REST API (free, no auth)
Sanctions Io
sanctions.io MCP — wraps the sanctions.io Screening API (api.sanctions.io)
Sanctions Screening
Sanctions Screening MCP — screen people, companies, vessels, and aircraft
Sarb Za
South African Reserve Bank (SARB) Web API MCP. Keyless.
Sba Loans
SBA loans MCP — U.S. Small Business Administration 7(a) / 504 FOIA loan