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Resend

Transactional email

Resend lets agents send transactional email and check delivery through one API. An API key from the Resend dashboard is passed to the local server as one environment variable.

What an agent can do with Resend

  • Send and schedule email

    The agent sends one email or a batch of emails through Resend, with attachments when you need them. It can also schedule an email for a later time. Before the send, it can change that time or cancel the email.

  • Check a delivery

    The agent finds a sent email and reads its details. The last_event field shows the latest status, for example "delivered". For more detail, the agent lists and inspects the API request logs, with the full request and response bodies.

  • Run a broadcast

    The agent creates, updates and sends broadcast campaigns. It also adds, updates and removes contacts, and manages contact properties, segments and topics. Use it to prepare a campaign and check the contacts before you send.

  • Set up domains and inbound mail

    The agent adds a sender domain to Resend and starts its verification. It creates webhooks that tell your app about email events. It also lists and reads inbound emails, and downloads their attachments.

How to connect Resend to OpenBot

  1. Open Resend in OpenBot

    Press Open in OpenBot on this page, or find Resend in the app's Apps tab. Get the app first if it is not on this computer.

  2. Add your API key

    Press Connect and enter this value. OpenBot keeps it on the computer that runs OpenBot.

    • API key - Resend dashboard → API keys

    Get a key

  3. Give an agent a task

    Ask an agent for work that needs Resend, such as one of the example prompts below. The agent uses the plugin's tools to do it.

Example prompts3

  • ResendSend the launch announcement draft to the beta list.
  • ResendDid the invoice email reach the customer?
  • ResendDraft a password-reset email for the new flow.

Apps1

  • Resend

    Email sending and delivery checks, over a local MCP server with a Resend API key.

Information6

Developer
resend.com
Category
Automation
Version
1.0.0
Website
resend.com
Privacy policy
resend.com/legal/privacy-policy
Terms
resend.com/legal/terms

Questions

Is the Resend MCP server official?

Yes. Resend calls it its official MCP server. The code is open source and is on npm as resend-mcp. The OpenBot listing runs this package as a local server. Resend also hosts a remote server that runs the same code.

Does the Resend plugin need an API key?

Yes. Make an API key in the Resend dashboard, then type it in the OpenBot connect dialog. OpenBot gives the key to the local server as the RESEND_API_KEY environment variable. The plugin catalog holds no secret. Resend also tells you to verify your domain before you use the local server.

What data does Resend get?

Your workspaces, conversations and files stay on the computer that runs OpenBot. Resend gets the requests that the agent sends, for example the text of an email, a contact to add or a domain to verify. These requests use your Resend account and your API key.

Does the Resend plugin cost anything?

Installing the plugin in OpenBot is free. Resend has a free transactional plan with 3,000 emails per month and a limit of 100 emails per day. The paid plans are Pro, Scale and Enterprise. Your Resend plan limits apply to the email that the agent sends.

Sources

Every statement about Resend comes from the pages below, checked on . They can change after that date.