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The real catalog of tools for AI agents

Google tells you what exists. Faceabot tells you what holds up.

44,737real tools
29,284callable over HTTPS
19,897measured
6,296proven reliable
4dayweek.io Jobs Reliable (measured) · 100% over 19 checks Does the job (tested) · 18/19

Search reduced-hours jobs and employers: 4-day weeks, 9-day fortnights, half-day Fridays and more.

MCP endpoint : https://4dayweek.io/api/mcp · website · measurements and details
Weekness — Week & Calendar Utilities Not measured yet

MCP server with ISO week and calendar tools for date conversion, week math, and weekday lookups.

Package oci : ghcr.io/dvdksn/weekness:1.0.0 · website · measurements and details
Business Day Calendars Reliable (measured) · 100% over 4 checks Does the job (tested) · 4/4

NYSE, Federal Reserve, TARGET2 and UK business days, holidays and T+N settlement dates.

MCP endpoint : https://business-days.quietworklabs.workers.dev/mcp · website · measurements and details
Custody Calendar Maker Reliable (measured) · 100% over 42 checks Does the job (tested) · 37/37

Custody schedules (2-2-3, 2-2-5-5, week on/off) as a year calendar both co-parents can subscribe to

MCP endpoint : https://custody-calendar.ekelund-apps.workers.dev/mcp · website · measurements and details
Chronary Flaky · 75% over 4 checks

Calendar API for AI agents: events, availability, Google/Microsoft setup, scheduling, and iCal.

MCP endpoint : https://api.chronary.ai/mcp · website · measurements and details
sync-day Reliable (measured) · 100% over 3 checks Does the job (tested) · 3/3

Free no-signup group scheduling; share a link and rank times by who's free.

MCP endpoint : https://sync.day/mcp/mcp · website · measurements and details
shikamaru Not measured yet

Provably correct day-count, calendar, business-day, and schedule math, verified against QuantLib.

Package npm : @jayofemi/shikamaru · website · measurements and details
reassign Private (key required)

Reassign: a circular 24-hour calendar and time-tracking copilot with ADHD-friendly scheduling.

MCP endpoint : https://reassign.app/api/mcp · website · measurements and details
time-tracking-billing-hours Being measured · 100% over 1 checks

Billable-hours time tracking with rates and CSV export, running inside Claude or Cursor.

MCP endpoint : https://mcp.zovo.one/mcp/time-tracking-billing-hours · website · measurements and details
Nolizi Calendar Reliable (measured) · 100% over 43 checks Fails real tasks · 0/43

Free scheduling your agent can book through: live availability, booking, verification, cancel.

MCP endpoint : https://calendar.nolizi.com/mcp · website · measurements and details
Tempi account Private (key required)

Run your own Tempi scheduling account: event types, working hours, calendars and bookings.

MCP endpoint : https://meettempi.com/mcp/account · website · measurements and details
PlugRail Japanese Calendar Flaky · 96% over 26 checks

Japanese holiday and business-day calculations using official Japan Cabinet Office data.

MCP endpoint : https://jp-calendar.plugrail.dev/mcp · website · measurements and details
Calendar Agent by Nova (CIVAI) Flaky · 97% over 35 checks

I do everything related to calendar scheduling

MCP endpoint : https://nova.civai.co/mcp/agents/calendar-agent · website · measurements and details
Holiday Calendar Reliable (measured) · 100% over 26 checks Does the job (tested) · 26/26

U.S. federal holidays with observed dates and business-day math. Example from an open-source kit.

MCP endpoint : https://starter.modernmustardseed.com/holidays · website · measurements and details
Date Math Calculator Being measured · 0% over 2 checks

Date arithmetic: day differences, business days, age, leap years, day-of-week, add/subtract.

MCP endpoint : https://apished.com/mcp/v1/datemath · website · measurements and details
Timezone Clock Not measured yet

Current time in a named IANA timezone.

MCP endpoint : https://agent-observatory-sensor.nolimit-observatory.workers.dev/s/timezone-clock/mcp · website · measurements and details
bookmarks-lifecycle Not measured yet

Bookmarks on a decision clock: 24 hours to decide, 30 days to watch, or keep. Never deletes.

Package npm : bookmarks-lifecycle · website · measurements and details
Brújula Private (key required)

Weekly planner and life organizer: tasks, week, expenses, lists, projects, recipes. In Spanish.

MCP endpoint : https://brujula.day/mcp · website · measurements and details
GMT clock Not measured yet

Current local time in GMT.

MCP endpoint : https://agent-observatory-sensor.nolimit-observatory.workers.dev/s/tz-gmt/mcp · website · measurements and details
Akiflow Private (key required)

Official Akiflow MCP for tasks, calendars, scheduling, time slots, and meeting transcripts.

MCP endpoint : https://mcp.akiflow.com/mcp · website · measurements and details

AI agents: all of this is available without keys over MCP https://faceabot.com/api/mcp · HTTP https://faceabot.com/api/catalog?q=… · Guide : llms.txt

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