# Resend

Resend is the email API for developers. It provides a modern API for sending transactional emails, managing email templates, and tracking email delivery status with comprehensive analytics.

- Category: Communication
- Connection: API key. Paste your own Resend API key once. It is stored encrypted and only your workspace uses it.
- Plans: Free: Not included; MCP only ($9/mo): 2,000 calls a month; Pro: 20,000 calls a month; Max: 20,000 calls a month
- Consent: Sending consent (https://krypton.bot/terms/#publishing). Before Resend connects, you confirm the sending consent: your bots send and move messages as you, and you are the sender of every message.

## Tools

- Create api key (`RESEND__CREATE_API_KEY`): Add a new API key to authenticate communications with Resend.
- Create audience (`RESEND__CREATE_AUDIENCE`): Create a list of contacts.
- Create broadcast (`RESEND__CREATE_BROADCAST`): Create a new broadcast to send to your audience.
- Create contact (`RESEND__CREATE_CONTACT`): Add a contact to an audience.
- Create domain (`RESEND__CREATE_DOMAIN`): Add a domain to your Resend account.
- Delete api key (`RESEND__DELETE_API_KEY`): Remove an existing API key.
- Delete audience (`RESEND__DELETE_AUDIENCE`): Remove an existing audience.
- Delete broadcast (`RESEND__DELETE_BROADCAST`): Delete a broadcast.
- Delete contact (`RESEND__DELETE_CONTACT`): Remove an existing contact.
- Delete domain (`RESEND__DELETE_DOMAIN`): Delete a domain.
- List api keys (`RESEND__LIST_API_KEYS`): Retrieve a list of API keys for the authenticated user.
- List audiences (`RESEND__LIST_AUDIENCES`): Retrieve a list of audiences.
- List broadcasts (`RESEND__LIST_BROADCASTS`): Returns a list of your broadcasts.
- List contacts (`RESEND__LIST_CONTACTS`): Returns a list of contacts for an audience.
- List domains (`RESEND__LIST_DOMAINS`): Returns a list of your domains.
- Retrieve audience (`RESEND__RETRIEVE_AUDIENCE`): Retrieve a single audience.
- Retrieve broadcast (`RESEND__RETRIEVE_BROADCAST`): Retrieve a single broadcast.
- Retrieve contact (`RESEND__RETRIEVE_CONTACT`): Retrieve a single contact.
- Retrieve domain (`RESEND__RETRIEVE_DOMAIN`): Retrieve a single domain.
- Send batch emails (`RESEND__SEND_BATCH_EMAILS`): Trigger up to 100 batch emails at once.
- Send broadcast (`RESEND__SEND_BROADCAST`): Start sending broadcasts to your audience through the Resend API.
- Send email (`RESEND__SEND_EMAIL`): Start sending emails through the Resend Email API.
- Update contact (`RESEND__UPDATE_CONTACT`): Update a contact.
- Update domain (`RESEND__UPDATE_DOMAIN`): Update a domain.
- Update email (`RESEND__UPDATE_EMAIL`): Update a scheduled email.
- Cancel email (`RESEND__CANCEL_EMAIL`): Cancel a scheduled email.
- Retrive email (`RESEND__RETRIVE_EMAIL`): Retrieve a single email.
- Verify domain (`RESEND__VERIFY_DOMAIN`): Verify a domain.

## Questions

### How do I connect Resend to Krypton?

Open Integrations in Krypton, find Resend and choose Connect, then paste your API key. Every bot in the workspace can then use it, and you choose which bots get which apps.

### Which plan includes Resend?

MCP only with 2,000 calls a month, Pro and Max with 20,000. Calls are shared by every catalog app in the workspace. Past the monthly number they keep working from AI credits at $0.90 per 1,000 calls; the count resets on the 1st (UTC) and a retried call counts once.

### Can I use Resend from Claude or Cursor?

Yes. Connect it in your workspace, then add https://mcp.krypton.bot as a streamable HTTP MCP server with your kmcp_ workspace key. Calls count toward the same monthly number.

Back to the [MCP catalog](https://krypton.bot/mcp-catalog/).