"email-assistant" is ambiguous: it could mean a tool for sending and managing email programmatically, or an AI agent that reads and acts on email. The sources below fit the sending/email-API reading, and AgentMail 10 fits the agent-inbox reading. If you want something else, such as a personal assistant that drafts replies in your own mailbox, please say which platform you use.
A question back: Do you want a tool that sends email from your code, or an AI agent that reads and replies to email in your own mailbox?
- 1
AgentMailagentmail.toverified and signed
Gives an AI agent its own inbox via API, with actions to select an organization and list organizations 20.
+11 community tools built for it
for agents: select_organization · list_organizations
- 2
Sendmuxsendmux.aiverified and signed
An email API that gives each AI agent a real inbox, with a send action for outbound email and attachments 16.
for agents: Sending · Sending · Sending
- 3
Mailjetmailjet.comverified and signed
A platform for sending marketing and transactional email with a send-email action and a custom API call action 11.
for agents: send_email · custom_api_call · email
- 4
Resendresend.comverified and signed
An email-sending API for developers with a single-send endpoint and a batch action that sends up to 100 emails per call 14.
+12 community tools built for it
for agents: send_batch_emails · POST /emails · POST /emails
Sources
- 1Mailjet: Best Email Marketing Software & Email API for Teamsmailjet.com · read 2026-10-30
- 4Resend · Email for developersresend.com · read 2026-10-29
- 6Sendmux - The Email API for AI Agents, with Inboxessendmux.ai · read 2026-10-29
- 10AgentMail | Email Inbox API for AI Agentsagentmail.to · read 2026-10-29
- 11Mailjet (Activepieces): declares "send_email" (the record we read and signed)unfragile.ai · read 2026-10-24
- 14Resend (Activepieces): declares "send_batch_emails" (the record we read and signed)unfragile.ai · read 2026-10-24
- 16Sendmux A2A: declares "Sending" (the record we read and signed)unfragile.ai · read 2026-10-24
- 20agentmail-mcp: declares "select_organization" (the record we read and signed)unfragile.ai · read 2026-10-24
For agents: the 10 actions behind this answer
send_email · Mailjet (Activepieces) verified and signed
Send Email — Send a text, HTML or template email through Mailjet
send_email · Mailgun (Activepieces) verified and signed
Send Email — Send an email using your Mailgun domain
send-email · MCP Mailtrap Server found in code, not yet checked
Send an email to your recipient email address using Mailtrap Email API. You can send emails to multiple recipients at once.
send_batch_emails · Resend (Activepieces) verified and signed
Send Batch Emails — Send up to 100 emails in a single API call
sendEmail · Maileroo (Activepieces) verified and signed
Send Email — Sends an email using the Maileroo API.
Sending · Sendmux A2A verified and signed
Send email and manage outbound attachments through Sendmux sending routes.
· EmailJS website read, tools not yet checked
Send email directly from your code – no server side code required. Add static or dynamic attachments, dynamic parameters, captcha code and more. Start with our free tier!
shipmail_send_message · shipmail-mcp verified and signed
Send an email from a mailbox ID, with optional durable client correlation, scalar metadata, and validated safe headers.
· SMTPfast website read, tools not yet checked
Send transactional emails with a simple REST API. Built on AWS SES, with real-time webhooks and searchable delivery logs that keep the receiving server's actual response next to the message that caused it.
select_organization · agentmail-mcp verified and signed
Choose which organization your AgentMail operations target (for users who
Labels are the instruments' verdict and are never changed by ranking. Agents and robots get this same answer as JSON at /api/v1/find?q=…&answer=1 and through the MCP server.