Home / MCP registry index / Topics / Calendar
Calendar MCP servers, with their tools checked
Every server in the official MCP registry that mentions Calendar, with a public endpoint, read the way an MCP client reads it and checked for tool poisoning. The list updates as the registry does, and each server is read again every week.
157 listed. We have read the tools of 20 so far; the others want credentials first, could not be reached, or are still waiting for their first read.
These servers act inside an account you own, usually with a token you give them. Prefer the narrowest access the tools need, and check which tools can send, post or delete.
| app.onehaus/haus app.onehaus/haus | 77 tools, nothing matched 2026-10-22 |
| Calendly io.github.pipeworx-io/calendly | 46 tools, nothing matched 2026-10-21 |
| Boston Calendar io.github.pipeworx-io/boston-calendar | 43 tools, nothing matched 2026-10-21 |
| Zooza MCP Server app.zooza/mcp-server | 18 tools, nothing matched 2026-10-22 |
| Acuity Scheduling MCP by usefulapi io.usefulapi/acuity-scheduling | 18 tools, nothing matched 2026-10-22 |
| Race Calendar F1 app.racecalendar/f1 | 15 tools, nothing matched 2026-10-22 |
| AutoPoster AI ai.autoposter/autoposter | 14 tools, nothing matched 2026-10-21 |
| com.birkinbagstock/mcp com.birkinbagstock/mcp | 14 tools, nothing matched 2026-10-22 |
| Content Calendar Agent by Nova (CIVAI) co.civai.nova/content-calendar-agent | 9 tools, nothing matched 2026-10-22 |
| io.github.syncday-app/sync-day io.github.syncday-app/sync-day | 8 tools, nothing matched 2026-10-22 |
| Calendar Agent by Nova (CIVAI) co.civai.nova/calendar-agent | 7 tools, nothing matched 2026-10-22 |
| Document Tools app.openkrill/docs | 6 tools, nothing matched 2026-10-22 |
| Shiftly Staff Scheduling Demo dev.zhiyong.easyshiftplan/shiftly-scheduling | 5 tools, nothing matched 2026-10-22 |
| RealRun com.baseledgerip.realrun/realrun | 4 tools, nothing matched 2026-10-21 |
| IPOGrid IPO Calendar & Filing Research com.ipogrid/ipogrid | 4 tools, nothing matched 2026-10-21 |
| Giornata Mondiale it.giornatamondiale/world-days | 4 tools, nothing matched 2026-10-22 |
| weekendflights app.weekendflights/weekendflights | 3 tools, nothing matched 2026-10-22 |
| Custody Calendar Maker dev.workers.ekelund-apps.custody-calendar/custody-calendar-maker | 3 tools, nothing matched 2026-10-22 |
| io.github.DataLeadsPRO/airbnb-data io.github.DataLeadsPRO/airbnb-data | 3 tools, nothing matched 2026-10-22 |
| Overlap — find a time a group is free (when2meet/Doodle alternative) dev.workers.notdown-app.overlap/group-scheduling-when2meet | 2 tools, nothing matched 2026-10-22 |
| BAMF.ai ai.bamf/bamf | needs credentials to list tools 2026-10-21 |
| Bynor ai.bynor/bynor | needs credentials to list tools 2026-10-21 |
| Calaf ai.calaf/calaf | needs credentials to list tools 2026-10-21 |
| Contio MeetingOS ai.contio/meetingos | needs credentials to list tools 2026-10-21 |
| RadiusOS CRM ai.radiusos.www/crm | needs credentials to list tools 2026-10-22 |
| Rawa ai.rawa/rawa | needs credentials to list tools 2026-10-22 |
| SimpleDock ai.simpledock/simpledock | needs credentials to list tools 2026-10-21 |
| Timothe's Growth Calendar ai.timothe/growth-calendar | needs credentials to list tools 2026-10-22 |
| Quieta app.getquieta/quieta-mcp | needs credentials to list tools 2026-10-22 |
| Kasar CRM app.kasar/crm | needs credentials to list tools 2026-10-22 |
| Keeploop app.keeploop/keeploop | needs credentials to list tools 2026-10-22 |
| app.reassign/reassign app.reassign/reassign | needs credentials to list tools 2026-10-22 |
| Schedii app.schedii/mcp | needs credentials to list tools 2026-10-22 |
| cn.pianam.mcp/calendar-mcp cn.pianam.mcp/calendar-mcp | not reachable 2026-10-22 |
| AddCal co.addcal/addcal | needs credentials to list tools 2026-10-22 |
| Buzzfy co.buzzfy/mcp | needs credentials to list tools 2026-10-22 |
| JackTrade CRM co.jacktrade/jacktrade-crm | needs credentials to list tools 2026-10-22 |
| Multi Calendar co.lumman/calendar | needs credentials to list tools 2026-10-22 |
| Avaza com.avaza/avaza-mcp | needs credentials to list tools 2026-10-22 |
| Iridium com.iridiumhqmcp/linkedin-mcp | needs credentials to list tools 2026-10-21 |
| Nilyo com.nilyo/nilyo | needs credentials to list tools 2026-10-21 |
| Shiftyasan Shift Scheduling com.shiftyasan/mcp-server | needs credentials to list tools 2026-10-21 |
| dev.workers.perch-app.meetwhen/meetwhen dev.workers.perch-app.meetwhen/meetwhen | not reachable 2026-10-22 |
| io.github.beronbrown/familycal io.github.beronbrown/familycal | needs credentials to list tools 2026-10-22 |
| io.github.bitsandtea/postking-mcp io.github.bitsandtea/postking-mcp | needs credentials to list tools 2026-10-22 |
| The Cloud io.github.tekalabs/the-cloud | needs credentials to list tools 2026-10-22 |
| officina.it it.officina/mcp | needs credentials to list tools 2026-10-22 |
| Zitli ch.zitli/zitli | not read yet |
| Google Agenda click.myagents/google-calendar | not read yet |
| eResource Scheduler cloud.eresourcescheduler.app/eresource-scheduler | not read yet |
| Akiflow com.akiflow/akiflow | not read yet |
| com.am-lich/vietnamese-calendar com.am-lich/vietnamese-calendar | not read yet |
| Ask My Envoy com.askmyenvoy/meeting-scheduling-coordination | not read yet |
| Chili Piper com.chilipiper/mcp | not read yet |
| CoSchedule com.coschedule/coschedule | not read yet |
| com.couillardelectricllc.voice/vera com.couillardelectricllc.voice/vera | not read yet |
| Cron Translator com.crontoenglish/cron-translator | not read yet |
| com.dropwatchhq/bio-catalyst com.dropwatchhq/bio-catalyst | not read yet |
| com.feedsquad/feedsquad com.feedsquad/feedsquad | not read yet |
| Fengshui Calculator com.fengshuicalculator/fengshui-calculator | not read yet |
| com.funding-radar/radar com.funding-radar/radar | not read yet |
| GCC Brokers com.gccbrokers/market-data | not read yet |
| HairDora Salon Scheduling com.hairdora/hairdora | not read yet |
| Jobkeepr com.jobkeepr/jobkeepr | not read yet |
| LandingConnect com.landingconnect/landingconnect | not read yet |
| Local MCP com.local-mcp/local-mcp | not read yet |
| Maeve Social com.maevesocial/maeve-social | not read yet |
| Mailbox MCP com.mailbox-mcp/mailbox-mcp | not read yet |
| Tempi account com.meettempi/tempi-account | not read yet |
| com.mintmcp/gcal com.mintmcp/gcal | not read yet |
| com.mintmcp/outlook-calendar com.mintmcp/outlook-calendar | not read yet |
| Holiday Calendar com.modernmustardseed/holiday-calendar | not read yet |
| Moltline Personal Suite com.moltlinestudio/personal | not read yet |
| PollUnit com.pollunit/mcp | not read yet |
| Pool Pro Florida com.poolproflorida/pool-pro-florida | not read yet |
| com.precision-concretecoating/mcp com.precision-concretecoating/mcp | not read yet |
| Professor Sausages — Finance com.professorsausages/sausage-finance | not read yet |
| com.proscendia/google-workspace com.proscendia/google-workspace | not read yet |
| Rotase com.rotase/rotase | not read yet |
| Simafri Suite com.simafri/professional-email | not read yet |
| Sonlight Window Cleaning com.sonlightwindow/booking | not read yet |
| SquawkFlow Market Structure com.squawkflow.mcp/market-structure | not read yet |
| SuperSaaS com.supersaas/mcp | not read yet |
| Text2Event com.text2event/mcp | not read yet |
| Codey 律所管理系統 com.thecodey/codey | not read yet |
| TherapyBill AI com.therapybillai/therapybill | not read yet |
| Time of Meeting com.timeofmeeting/time-of-meeting | not read yet |
| TradeAlmanac com.tradealmanac/mcp-server | not read yet |
| Caly com.trycaly/caly | not read yet |
| Nysa com.usenysa/nysa | not read yet |
| Whenna com.whenna/whenna | not read yet |
| com.whensport/whensport com.whensport/whensport | not read yet |
| beckett com.yourbeckett/beckett | not read yet |
| Astrocal dev.astrocal/mcp-server | not read yet |
| PlugRail Japanese Calendar dev.plugrail/jp-calendar | not read yet |
| Shirabe Japan Data Hub dev.shirabe/hub | not read yet |
| toolvend - utility APIs for agents dev.toolvend/dns-whois-domain-tools | not read yet |
| BlogSEO io.blogseo/blogseo | not read yet |
| Cronch io.cronch/cronch | not read yet |
| io.github.albemarlestudio/clayre io.github.albemarlestudio/clayre | not read yet |
| AI Agent Background Job Queue io.github.Ansarii/mcp-durable-tasks | not read yet |
| Agent-Native Calendar io.github.BuilderIO/agent-native-calendar | not read yet |
| PropelAgent Studio io.github.contacto291/propelagent | not read yet |
| Critical Path Partners io.github.danafitkowski/cpp-cpm-engine | not read yet |
| WonderCal io.github.digital-wisdom-ai/wondercal | not read yet |
| io.github.dodopok/estevao-mcp io.github.dodopok/estevao-mcp | not read yet |
| iBuildPro io.github.hananzlot/ibuildpro | not read yet |
| io.github.hebcal/hebcal io.github.hebcal/hebcal | not read yet |
| io.github.IsaiahDupree/calendar-bridge io.github.IsaiahDupree/calendar-bridge | not read yet |
| Grounders MCP io.github.ItsBreeze/grounders-mcp | not read yet |
| Hub io.github.ItsBreeze/hub | not read yet |
| io.github.KyleClouthier/slotrobin io.github.KyleClouthier/slotrobin | not read yet |
| io.github.liserichards/pestprocrm io.github.liserichards/pestprocrm | not read yet |
| Lunacal io.github.Lunacal/lunacal | not read yet |
| MotoGP (Race Results) io.github.manuelescrig/raceresults-mcp | not read yet |
| AgentBill io.github.marketinglior-pixel/agentbill-mcp | not read yet |
| io.github.MatsushitaTokitsugu/micro-data-api-factory io.github.MatsushitaTokitsugu/micro-data-api-factory | not read yet |
| DietBox io.github.mcp-dir/dietbox-mcp | not read yet |
| TimeToPost io.github.MelMayssonOwen/timetopost-mcp | not read yet |
| Wasilah io.github.mumullickm/wasilah-mcp | not read yet |
| Consistency Calendar io.github.olliejgooding/consistency-calendar | not read yet |
| Oncofiles io.github.peter-fusek/oncofiles | not read yet |
| io.github.physics-star-cat/databutler-calendar io.github.physics-star-cat/databutler-calendar | not read yet |
| Fed Comms io.github.pipeworx-io/fed-comms | not read yet |
| Google_calendar io.github.pipeworx-io/google_calendar | not read yet |
| Outlook Calendar io.github.pipeworx-io/outlook-calendar | not read yet |
| Prayer Times io.github.pipeworx-io/prayer-times | not read yet |
| Regulatory Catalysts io.github.pipeworx-io/regulatory-catalysts | not read yet |
| Xome io.github.pipeworx-io/xome | not read yet |
| io.github.retep-tru/maeil io.github.retep-tru/maeil | not read yet |
| Islamic calendar month 1-12 band io.github.sadri-dridi/islamic-ok | not read yet |
| Calendar quarter 1-4 band io.github.sadri-dridi/qtr-n | not read yet |
| TrueCal io.github.SuperboxAI/gptbot-food-calendar | not read yet |
| InviteKit Calendar Files io.github.theluckystrike/calendar-invite | not read yet |
| Printable Calendar Maker io.github.theluckystrike/printable-calendar | not read yet |
| DelegAIze io.github.toasternet/delegaize | not read yet |
| Toddyi io.github.toddyi-app/toddyi | not read yet |
| Economic Calendar & News Risk io.github.tylerscomic-lab/econ-calendar-mcp | not read yet |
| RoxSkin HYROX io.roxskin/hyrox | not read yet |
| Hostaway MCP by usefulapi io.usefulapi/hostaway | not read yet |
| Pipeline CRM MCP by usefulapi io.usefulapi/pipeline-crm | not read yet |
| Reclaim.ai MCP by usefulapi io.usefulapi/reclaimai | not read yet |
| SavvyCal MCP by usefulapi io.usefulapi/savvycal | not read yet |
| Teamup Calendar MCP by usefulapi io.usefulapi/teamup-calendar | not read yet |
| Passport.Me me.passport/mcp | not read yet |
| WhenMeet.me — group scheduling me.whenmeet/scheduler | not read yet |
| mu.micro/mu mu.micro/mu | not read yet |
| mx.fullthrottle/motocross-tracks mx.fullthrottle/motocross-tracks | not read yet |
| Totally Tarot Calculators net.totallytarot/calculators | not read yet |
| network.lucie/sync network.lucie/sync | not read yet |
| page.horsepower/horsepower page.horsepower/horsepower | not read yet |
| muse.space space.muse/mcp | not read yet |
| The Market Calendar tech.marketcalendar/seasonality | not read yet |
| 42min us.42min/meetings | not read yet |
| M365 Graph MCP work.mcps/m365-graph | not read yet |
| Torah Library xyz.kolsgo.torah/torah-library | not read yet |
| Blocks zone.blocks/blocks | not read yet |
Choosing one
Open a server's page to see the tools it advertises, whether it sets instructions for the model, and our latest read. Here, 20 of the servers shown matched none of our tool-poisoning rules on their last read. A clean read means our rules found nothing, not that a server is harmless; still check what access it asks for. To check one that is not listed, paste its URL into the free MCP server check.
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