# Calendar and scheduling APIs for AI agents (slim)

> 7 calendars & scheduling listings ranked by the Anchor benchmark. Leader Google Calendar API (A). APIs that read and write calendars across Google and Microsoft, find free time and book meetings, with booking pages and reminders. Compared on the providers covered, availability logic, webhooks and price per connected account.

- Full: https://www.anchorterminal.com/categories/scheduling.md (~3,750 tokens) · this version ~480 tokens · JSON https://www.anchorterminal.com/categories/scheduling.json · canonical https://www.anchorterminal.com/categories/scheduling
- Index: https://www.anchorterminal.com/llms.txt · API: https://www.anchorterminal.com/api/v1/index.json · Updated: 2026-10-05

- Tools: 7 · agent-ready (BB+): 2 · accept x402: 0 · JSON: https://www.anchorterminal.com/api/v1/tools.json · by capability: https://www.anchorterminal.com/api/v1/capabilities.json
- Capabilities: calendar.read, calendar.write, calendar.availability, calendar.booking, calendar.webhooks

| # | Tool | Grade | Score | Confidence | x402 | Auth | Where | Slim |
| --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 8 | Google Calendar API | A | 79.5 | medium | no | OAuth | hosted | https://www.anchorterminal.com/tools/google-calendar-api.min.md |
| 87 | Nylas Calendar and Scheduler API | BB | 71.3 | medium | no | OAuth or key | hosted | https://www.anchorterminal.com/tools/nylas-calendar.min.md |
| 125 | Calendly API + MCP | B | 68.4 | medium | no | OAuth or key | hosted | https://www.anchorterminal.com/tools/calendly.min.md |
| 170 | Microsoft Graph Calendar API | B | 65.6 | medium | no | OAuth | hosted | https://www.anchorterminal.com/tools/microsoft-graph-calendar.min.md |
| 182 | Cronofy API | B | 64.4 | medium | no | OAuth or key | hosted | https://www.anchorterminal.com/tools/cronofy.min.md |
| 292 | Cal.com API v2 + MCP | C | 57.5 | medium | no | OAuth or key | hosted + local | https://www.anchorterminal.com/tools/cal-com.min.md |
| 417 | Apiroc Unified Calendar API | E | 41.3 | medium | no | OAuth or key | hosted | https://www.anchorterminal.com/tools/apiroc.min.md |