MCP servers over stdio
An MCP server is something you connect an agent to. The registry will tell you a server's name, its version and how to reach it — but not what it can do, which is the only thing you actually want to know. We read that off the repository.
31,279 servers, 76,670 tool names across 6,537 of them, last read 11 September 2026.
A server's tools are not in the registry. We read them from the repository README, which means a list here is what the README documented and an absence is usually silence rather than a server with nothing to offer: 20.9% of servers have a list, and filtering on tools narrows to those. Where a list exists, the page for the server says which part of the README it came from.
- mcpio.github.refgrow · 18 tools
- lightning-enable-mcpio.github.refined-element · 26 tools
- syncbridge-mcpio.github.rehmansherazi
- mockpostio.github.reiarseni
- squireio.github.reidgoodbar
- postmd-mcp-serverio.github.reinlainer · 23 tools
- sonovaultio.github.rekordcloud · 15 tools
- relay-mcpio.github.relayprotocol
- multi-mcpio.github.religa
- remembraio.github.remembra-ai
- appstore-screenshotsio.github.remoas
- swiss-health-mcpio.github.remoprinz · 4 tools
- custom-mcp-databaseio.github.renanlido · 4 tools
- agentic-task-systemio.github.renezander030
- graphiti-localio.github.renezander030
- meshimize-mcpio.github.renl · 21 tools
- rentahumanio.github.rentahuman-ai
- qsys-mcpio.github.reowens
- rephrasy-mcpio.github.rephrasyai · 2 tools
- replenio.github.replenhq
- mcpio.github.replynodes · 17 tools
- relay-mcpio.github.reservoirprotocol
- outage-mcpio.github.reshadat · 5 tools
- tmcra-mcp-serverio.github.reshuibuduo · 9 tools
- tool-filter-mcpio.github.respawn-app
- daleads-mcpio.github.resuly
- mcp-serverio.github.retain-so · 7 tools
- zetesisio.github.reutavidan
- prediction-market-mcpio.github.reviewmyemails
- opportunity-mcpio.github.revolutionarybukhari · 6 tools
- psx-mcpio.github.revolutionarybukhari
- promptrejectormcpio.github.revsmoke
- rancher-mcpio.github.rex
- insightsentry_mcpio.github.rezmeplxrf
- pvpc-mcp-serverio.github.rfdez · 1 tools
- docbot-mcpio.github.rflukerii-dev
- linux-filesystemio.github.rghsoftware
- reportcraftio.github.rharper105
- agoragenticio.github.rhein1
- linux-mcp-serverio.github.rhel-lightspeed
- agy-headless-bridgeio.github.rhishi99
- etapa-mcpio.github.rhoneybul
- rule-driftio.github.ri7in
- volanteio.github.ribato22
- docsonario.github.ribhav-jain
- mcp-awaitio.github.ricardo-hdrn · 8 tools
- netwrightio.github.ricfanin
- smart-webio.github.rich-jojo
- web-task-apiio.github.rich-jojo
- popup-mcpio.github.richard-kim-79
- ai2human-mcpio.github.richard7463
- cadloop-openscadio.github.richardofortune
- cadloop-slicerio.github.richardofortune
- tyrekickio.github.richardofortune
- statlyteio.github.richardwilkinson9
- yapsio.github.richawo
- isitdisposable-mcpio.github.richelo · 3 tools
- cochlea-mcpio.github.richer-richard
- fenestra-mcpio.github.richer-richard
- supernote-mcpio.github.ridget · 5 tools
- ridvay-mcpio.github.ridvay-ai · 10 tools
- rigourio.github.rigour-labs
- alertlogic-mcpio.github.rijul170
- falcon-mcpio.github.rijul170
- qualys-mcpio.github.rijul170
- sophos-central-mcpio.github.rijul170
- prolog-reasonerio.github.rikarazome · 4 tools
- regulatory-signalsio.github.rikocr8orh8
- oracle-feeds-mcpio.github.rileybuilds
- rillio.github.rillcoin
- standupbotio.github.rimysore · 3 tools
- projectmemio.github.riponcm
- audio-sonic-mcpio.github.ripunjay-kashyap
- prompt-compassio.github.rishabhmpc · 1 tools
- claude-prompt-optimizerio.github.rishiatlan
- ida-pro-mcp-fusionio.github.rison1337
- x64dbg-mcpio.github.rison1337
- packwright-mcpio.github.rithwikbabu
- areacode-mcpio.github.riv-lc · 8 tools
- rival-regulatory-toolkitio.github.rival-intelligence
- recite-mcpio.github.rivradev
- arca-agroio.github.rje1974
- interbankingio.github.rje1974
- sports-card-agentio.github.rjexile · 9 tools
- mcp-yoloio.github.rjn32s · 2 tools
- osint-mcpio.github.rjn32s
- local-skills-mcpio.github.rkdpa
- cosmergonio.github.rkocosmergon
- green-mcpio.github.rlawogh1005
- outlookio.github.rlrghb
- groundtruthio.github.rm-rf-prod
- catalyst-edge-mcpio.github.rm0nroe
- losbeto-mcpio.github.rmartins1451
- ios-sim-mcpio.github.rmathew1973 · 34 tools
- ardupilot-mavlink-mcpio.github.rmeadomavic · 9 tools
- addsign-mcpio.github.rmindgh
- qseow-mcpio.github.rmterenzi
- rn-devtools-hubio.github.rn-devtools-hub
- wp-mcpio.github.rnaga
- mcp-serverio.github.roamzy-io · 12 tools
- claude-armyio.github.robbhimself-1337 · 6 tools
- mcp-lintio.github.robert19001-cmyk
- nooxus-mcpio.github.robertglools
- webmcp-todayio.github.robertn702
- konidio.github.robertnowell
- mcp-ordali-memoryio.github.robin-deruyck
- simconnect-mcpio.github.robin24
- stripe-mcpio.github.robinafaruqia · 8 tools
- cap-shieldio.github.robinlidberg-dot · 6 tools
- f5xc-terraform-mcpio.github.robinmordasiewicz
- routerio.github.robot-resources
- scraperio.github.robot-resources
- robo-cortexio.github.robotel-limited
- ros-mcp-serverio.github.robotmcp
- storyblocksio.github.rocksfrow
- agent-mcp-gatewayio.github.roddutra
- viralhunt-mcpio.github.rodvan
- pmdio.github.roeiba
- a11yio.github.rog0x
- apiio.github.rog0x · 5 tools
- cacheio.github.rog0x · 5 tools
- colorio.github.rog0x
- configio.github.rog0x · 12 tools
- cryptoio.github.rog0x
- databaseio.github.rog0x
- depio.github.rog0x
- dockerio.github.rog0x · 5 tools
- docsio.github.rog0x · 11 tools
- envio.github.rog0x · 14 tools
- fileio.github.rog0x · 5 tools
- gitio.github.rog0x · 5 tools
- githubio.github.rog0x
- i18nio.github.rog0x · 4 tools
- imageio.github.rog0x
- jsonio.github.rog0x · 7 tools
- lintio.github.rog0x · 3 tools
- logio.github.rog0x
- markdownio.github.rog0x
- mathio.github.rog0x · 5 tools
- networkio.github.rog0x · 5 tools
- npmio.github.rog0x
- perfio.github.rog0x · 14 tools
- regexio.github.rog0x · 5 tools
- schemaio.github.rog0x
- seoio.github.rog0x · 6 tools
- stringio.github.rog0x · 11 tools
- taskio.github.rog0x
- testingio.github.rog0x · 18 tools
- timeio.github.rog0x · 18 tools
- webio.github.rog0x · 5 tools
- webhookio.github.rog0x · 3 tools
- cudaq-docs-mcpio.github.rogerawong
- darwin-memoio.github.rogermsc
- rendercheckio.github.rogermsc
- mcp-serverio.github.rogertheunissenmerge-oss · 7 tools
- mcp-real-estate-serverio.github.rogiervdbrnk
- sentinel-execution-mcpio.github.rohith1125 · 40 tools
- mcp-ml-labio.github.rohithraju-ops · 5 tools
- zettelforgeio.github.rolandpg
- arcwall-securityio.github.rom-baro · 7 tools
- mcp-openclawio.github.romainsantoli-web
- memory-os-aiio.github.romainsantoli-web
- agentpayio.github.romudille-bit
- fablecutio.github.ronak-create
- vivariumio.github.rongchang726-png
- geoservercloud-mcpio.github.ronitjadhav
- healthchecks-io-mcpio.github.ronniechong
- notebooklm-mcpio.github.roomi-fields
- osc-bridgeio.github.roomi-fields
- rtfmio.github.roomi-fields · 13 tools
- flstudio-mcpio.github.rosasynthesiz
- mcp-encrypted-sqliteio.github.rosch100 · 7 tools
- mcp-sqliteio.github.rosch100 · 7 tools
- letmepostio.github.rosekamallove
- rosh-mcpio.github.rosh-studio · 9 tools
- filesiftio.github.roshunsunder
- klawsio.github.rostradamus · 4 tools
- fixme-agentio.github.rotem1230
- mcp-serverio.github.rotifer-protocol
- grounderio.github.rozetyp
- jira-alerts-mcpio.github.rrvrs
- janeeio.github.rsdouglas · 5 tools
- rsk-mcp-serverio.github.rsksmart · 22 tools
- multimodalio.github.rsmdt · 5 tools
- rstreamio.github.rstreamlabs
- pixelvaultio.github.rsweeting1
- gatewardsio.github.rtahabas
- kci-openapi-mcpio.github.rubato103
- nl-openapi-mcpio.github.rubato103
- kci-openapi-mcpio.github.rubatoyd
- kosis-openapi-mcpio.github.rubatoyd
- na-openapi-mcpio.github.rubatoyd
- nl-openapi-mcpio.github.rubatoyd
- scienceon-mcpio.github.rubatoyd
- news-serverio.github.rubtuc
- agent-guardrailio.github.rudimentall1
- agentic-wallet-guardian-v3io.github.rudimentall1
- devmcpio.github.rudranaresh0201
- verimcpio.github.rudranaresh0201
- mcp-guardianio.github.rudraneel93
Live servers only. The whole corpus is one call away through the search API — including tools=, which is how you ask for a server by what it does rather than by what it is called.