AgentMail

AgentMail is an API-first email platform built for agents and automation. AgentMail lets you create email inboxes on the fly, send and receive messages, reply to threads, manage drafts, and organize conversations with labels — all through a simple REST API designed for programmatic access.

Why AgentMail?

• Agent-Native Email: Purpose-built for AI agents and automation — create inboxes, send messages, and manage threads without human-facing UI overhead.
• Full Email Lifecycle: Send new messages, reply to threads, forward emails, manage drafts, and schedule sends — all from a single API.
• Thread & Conversation Management: Organize emails into threads with full read, reply, forward, and label support for structured conversation tracking.
• Draft Workflow: Compose drafts, update them, schedule sends, and dispatch when ready — perfect for review-before-send workflows.
• Label Organization: Tag threads and messages with custom labels for filtering, routing, and downstream automation.

Using AgentMail in Sim

Sim's AgentMail integration connects your agentic workflows directly to AgentMail using an API key. With 20 operations spanning inboxes, threads, messages, and drafts, you can build powerful email automations without writing backend code.

Key benefits of using AgentMail in Sim:

• Dynamic inbox creation: Spin up new inboxes on the fly for each agent, workflow, or customer — perfect for multi-tenant email handling.
• Automated email processing: List and read incoming messages, then trigger downstream actions based on content, sender, or labels.
• Conversational email: Reply to threads and forward messages to keep conversations flowing naturally within your automated workflows.
• Draft and review workflows: Create drafts, update them with AI-generated content, and send when approved — ideal for human-in-the-loop patterns.
• Email organization: Apply labels to threads and messages to categorize, filter, and route emails through your automation pipeline.

Whether you're building an AI email assistant, automating customer support replies, processing incoming leads, or managing multi-agent email workflows, AgentMail in Sim gives you direct, secure access to the full AgentMail API — no middleware required. Simply configure your API key, select the operation you need, and let Sim handle the rest.

Usage Instructions

Integrate AgentMail into your workflow. Create and manage email inboxes, send and receive messages, reply to threads, manage drafts, and organize threads with labels. Requires API Key.

Tools

agentmail_create_draft

Create a new email draft in AgentMail

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agentmail_create_inbox

Create a new email inbox with AgentMail

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agentmail_delete_draft

Delete an email draft in AgentMail

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agentmail_delete_inbox

Delete an email inbox in AgentMail

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agentmail_delete_thread

Delete an email thread in AgentMail (moves to trash, or permanently deletes if already in trash)

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agentmail_forward_message

Forward an email message to new recipients in AgentMail

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agentmail_get_draft

Get details of a specific email draft in AgentMail

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agentmail_get_inbox

Get details of a specific email inbox in AgentMail

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agentmail_get_message

Get details of a specific email message in AgentMail

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agentmail_get_thread

Get details of a specific email thread including messages in AgentMail

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agentmail_list_drafts

List email drafts in an inbox in AgentMail

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agentmail_list_inboxes

List all email inboxes in AgentMail

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agentmail_list_messages

List messages in an inbox in AgentMail

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agentmail_list_threads

List email threads in AgentMail

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agentmail_reply_message

Reply to an existing email message in AgentMail

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agentmail_send_draft

Send an existing email draft in AgentMail

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agentmail_send_message

Send an email message from an AgentMail inbox

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agentmail_update_draft

Update an existing email draft in AgentMail

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agentmail_update_inbox

Update the display name of an email inbox in AgentMail

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agentmail_update_message

Add or remove labels on an email message in AgentMail

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agentmail_update_thread

Add or remove labels on an email thread in AgentMail

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