Whenna
Find the best time for group meetings by collecting everyone's availability and locking a final time.
Whenna creates shareable scheduling links where participants mark when they're free. Muse can create plans, collect availability from multiple people, identify the best meeting times, and lock a final time with calendar links for Google, Outlook, or .ics.
Try asking Muse: "Find a time for our book club to meet next month when everyone is available."
Source: Found in the official MCP Registry (com.whenna/whenna) · First listed September 24, 2026
Last 24 hours
Each bar is one check, every 15 minutes. Green means it answered. Last checked 7 min ago.
Is it safe to connect?
What Muse can see: It does not ask you to sign in, so it cannot see your accounts. It only sees what Muse sends it from your request.
Before it acts: Read what Muse plans to do before you approve it, and remove the app from Muse when you stop using it.
musedirectory.ai is not part of Meta. More about how Muse handles your information
How to add it to Muse
Not in Muse's Connectors list yet, but Muse can still use it. Copy the request below and paste it into Muse. Muse asks before it shares anything with the app's site. Meta does not review apps used this way, so only use ones you trust. We tested this in the Muse app on September 24, 2026: Muse used an app's link directly this way and returned a live answer.
https://whenna.com/mcpNot in Muse's Connectors list yet. Muse can still use it: its page gives you a request to paste into Muse.
Technical details: safety screening, tools, response time and recent checks
Response time at the last check: 1259ms. Worked in 100% of checks over 30 days.
Screening · September 24, 2026
Screened, no issues found
Screening looks for known threats and hidden instructions at the time of the check, and runs again weekly and whenever the tool list changes. It cannot see the server's code, so only connect what you need and review what Muse asks to do. How screening works.
Tools · 7
whenna_create_planCreate a Whenna plan (a shareable link that finds the time everyone is free). Returns the link to share with humans or other agents, and a creator_key that authorizes locking the final time. Times are wall-clock in the given IANA timezone. For a RECURRING plan ("every Tuesday"), whenna_get_planFetch a Whenna plan: title, window, every participant's availability, ranked best times, the locked final time if set, and a negotiation brief — state (awaiting_answers | collecting | everyone_overlaps | locked), who has answered, and suggested_next_step telling an agent the bestwhenna_mark_availabilitySet a participant's free times on a plan (replaces that participant's previous answer). Express availability as free ranges per day; the server converts them to slots. Use the participant's human name so the group recognizes them. An EMPTY free array records an explicit "can't mawhenna_set_placeSet where the group meets: a place name, or video_call:true to attach Whenna's built-in encrypted video room (the room link then goes on everyone's calendar automatically). Place and video room are mutually exclusive. Requires creator_key.whenna_plan_nextGroup memory: start the group's next plan from a finished one. Clones the setup (title, hours, place/video, discussion), proposes the next occurrences of the locked weekday as candidate days, links old→new (the old link shows everyone "the next one is live"), and emails the peoplwhenna_best_timesRanked best meeting times for a plan: contiguous blocks where the most participants are free, with who is free in each block.whenna_lock_timeLock the final time on a plan (requires the creator_key returned by whenna_create_plan). Pass use_best:true to lock the top-ranked best time automatically, or give an explicit day/start. Everyone viewing the link sees it as confirmed, with add-to-calendar buttons. Returns calendaRecent checks
Link
https://whenna.com/mcpQuestions about Whenna in Muse
How do I connect Whenna to Muse?
Not in Muse's Connectors list yet, but Muse can still use it. Paste this into Muse: "Use Whenna to help me. It is a free service with an MCP server at https://whenna.com/mcp. It does not need an API key. Ask me before you share anything with it." Muse asks before it shares anything with the app's site. Meta does not review apps used this way, so only use ones you trust. We tested this in the Muse app on September 24, 2026: Muse used an app's link directly this way and returned a live answer.
Is Whenna working right now?
At the last check (September 28, 2026, 09:00 UTC) the endpoint was working, answering in 1259ms. Over the last 7 days it answered 100% of health checks. It is checked every 15 minutes.
Is Whenna safe to connect to Muse?
It was screened on September 24, 2026 with the result "screened, no issues found". Screening checks the domain against threat feeds and reads the tools for hidden instructions and requests for passwords or card numbers. It cannot see the server's code, so grant only the access you need.
What can Whenna do in Muse?
It exposes 7 tools, including whenna_create_plan, whenna_get_plan, whenna_mark_availability, whenna_set_place. For example, you could ask Muse: "Find a time for our book club to meet next month when everyone is available."
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