Microsoft Teams API
Microsoft Teams API (via Microsoft Graph) — enterprise collaboration platform API enabling agents to send messages to channels and chats, create Teams/channels, schedule meetings, manage membership, and build Teams bots and apps.
Score Breakdown
⚙ Agent Friendliness
🔒 Security
Azure AD-backed with fine-grained OAuth scopes. Admin consent required for application permissions. HIPAA BAA available. FedRAMP authorized for US government. Data stored in Microsoft's compliance boundary. Audit logs via Microsoft Purview.
⚡ Reliability
Best When
Your users are in a Microsoft 365 enterprise environment and you need agents to interact with them where they already work — posting notifications, creating meetings, or building Teams bots.
Avoid When
Your users don't use Microsoft 365, you need consumer messaging, or you're building high-volume transactional notification systems.
Use Cases
- • Agents posting notifications to Teams channels — send adaptive card messages to specific channels when deployments complete, incidents fire, or reports are ready
- • Meeting scheduling automation — agents creating Teams meetings via Graph API and distributing join links based on calendar availability
- • Teams bot integration — agents implemented as Teams bots responding to @mentions and proactively messaging users in 1:1 chats
- • Approval workflows — agents posting adaptive cards with action buttons to Teams channels and processing user responses via webhooks
- • User and team provisioning — agents creating Teams, adding members, and configuring channels as part of onboarding automation for new employees or projects
Not For
- • Consumer messaging — Teams is enterprise-only; use WhatsApp Business, SMS, or Slack for consumer-facing communications
- • Anonymous/guest-first experiences — Teams requires Microsoft 365 accounts for full functionality; external participants have limited access
- • High-volume programmatic messaging — Teams is not designed for transactional notifications at scale; use email or dedicated notification services
Interface
Authentication
Azure AD OAuth2. Application permissions (no user, requires admin consent) for sending messages, creating teams. Delegated permissions require a signed-in user. Teams bots use Bot Framework credentials. Client credentials flow for automation agents. Scopes: ChannelMessage.Send, Chat.ReadWrite, Team.Create, etc.
Pricing
Teams API access requires Microsoft 365 subscription for the target tenant. API calls themselves don't have per-call pricing — covered by M365 subscription. Bot Framework hosting costs separate.
Agent Metadata
Known Gotchas
- ⚠ Sending messages to Teams channels requires a Teams app installed in the team — agents cannot message arbitrary channels without prior app installation or admin consent
- ⚠ Proactive messaging to users in 1:1 chats requires the bot to have a conversation reference from a previous user interaction — agents cannot cold-start message users
- ⚠ Application permissions to send channel messages require Microsoft 365 admin consent — cannot self-authorize for enterprise tenants
- ⚠ Teams throttling uses a per-tenant, per-application model — agents hitting limits get 429 errors that may persist for minutes even after backing off
- ⚠ Rich adaptive card interactions (action buttons) require Bot Framework infrastructure, not just Graph API — pure REST API agents cannot handle button click responses
Alternatives
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Scores are editorial opinions as of 2026-03-06.