Resend

Resend app for Attio, built with the App SDK.

Overview

Resend is an email API for developers. This app exposes Resend actions as Attio workflow steps, so a workflow can push people from the CRM into Resend's contact list.

Features

• Create contact workflow step — create a Resend contact from an email address, with an optional name and subscription status
• Add contact to segment workflow step — add an existing Resend contact to a segment

Folder structure

Path	Description
src/app	Entry points, discovered by folder convention: extensions/, settings/, events/, webhooks/, blocks/ (App structure)
src/resend	Code interacting with the Resend API — the client wrapper, error types and messages
src/server-functions	Thin controllers the block configurator calls to list/get contacts and segments
src/utils	Shared utility functions
src/__mocks__	Vitest stubs for attio/server

Development

pnpm install      # install dependencies
pnpm run dev      # run the app in dev mode
pnpm run lint     # lint
pnpm run test     # run tests

See AGENTS.md for architecture and coding guidelines.