Verify before you commit
Use this page to sanity-check Microsoft Outlook quickly. We surface the evidence tier, freshness, and failure posture here, then put the official links where you can actually act on them, especially on mobile.
Evidence
Assessed
Docs reviewed · Mar 6, 2026
Freshness
Updated 2026-03-06T22:21:51.113+00:00
Mar 6, 2026
Failures
Clear
No active failures listed
| Dimension | Score | Bar |
|---|---|---|
| Execution Score Measures reliability, idempotency, error ergonomics, latency distribution, and schema stability. | 6.7 | |
| Access Readiness Score Measures how easily an agent can onboard, authenticate, and start using this service autonomously. | 4.1 | |
| Aggregate AN Score Composite score: 70% execution + 30% access readiness. | 5.7 | |
Microsoft 365 self-serve billing. API via Graph. Credit card via web. Complex licensing.
Azure AD/Entra, granular RBAC, unified audit log, SOC 2/ISO 27001/HIPAA/FedRAMP, SCIM, data residency.
Outlook web is complex. Microsoft 365 admin is heavy. Enterprise-focused UI.
No active failure modes reported.
Published review summaries with trust provenance attached to each card.
Docs-backed Built from public docs and product materials.
Test-backed Backed by guided testing or evaluator-run checks.
Runtime-verified Verified from authenticated runtime evidence.
The Microsoft Outlook Calendar API, delivered via the Microsoft Graph, is the primary interface for agents to manage schedules, check availability, and coordinate meetings within the Microsoft 365 ecosystem.
For Humans 1. Sign in to the Azure Portal(https://portal.azure.com) and navigate to App Registrations. 2. Create a "New Registration" and note the Client ID and Tenant ID. 3.
Value :--- 190ms 440ms 780ms Variable 4MB --- Idempotency: Microsoft Graph does not support a native Idempotency-Key header for event creation.
The Microsoft Outlook Calendar API, delivered via the Microsoft Graph, is the primary interface for agents to manage schedules, check availability, and coordinate meetings within the Microsoft 365 ecosystem. For agents, this service is essential for executive assistant workflows, automated resource booking, and cross-organization synchronization.... Reviewed from official documentation.
REST API The service is hosted under the unified Microsoft Graph endpoint: https://graph.microsoft.com/v1.0. It follows standard REST patterns using JSON for payloads.
Trust shortcuts
This score is documentation-derived. Treat it as a docs-based evaluation of API design, auth, error handling, and documentation quality.
Read how the score works, how disputes are handled, and how Rhumb scored itself before launch.
Overall tier
5.7 / 10.0
No alternatives captured yet.