API parity
Emails, batch sends, contacts, audiences, broadcasts, domains, templates, topics and suppressions, all with Resend's shapes.
Open source · Resend-compatible
Email for
developers,
without sending any.
Pretend is a local emulator for the Resend API. Point the official SDK at localhost and inspect every email your app sends: HTML, headers, attachments and events.
Works with the official Resend SDKs you already use
Integrate
Change one URL.
Keep your code.
Pretend mirrors Resend's request and response shapes. Set the SDK's base URL to the emulator and every send lands in your local inbox instead of a real one.
- Same endpoints, same errors, same IDs
- Default key
re_local_dev_key - Verified against the pinned
resendSDK in CI
Features
Everything Resend does,
right on your machine.
Email inspector
Preview, plain text, HTML, raw MIME, headers and an events timeline for every captured email.
Webhooks
Delivery events are signed and posted to your local endpoints, with every attempt logged and replayable.
Attachments
Base64 content or remote paths up to 40 MB, stored locally and served through signed download URLs.
Broadcasts
Send to a segment and get one captured email per contact, ready to inspect.
Persistent by default
SQLite storage survives restarts. Reset everything with one request when you want a clean slate.
Dashboard
See exactly what
your users would.
HTML renders in a sandboxed frame with full CSS and web fonts. JavaScript is neutralised.
Start capturing
in one command.
docker run -p 3000:3000 -e DISABLE_LOGIN=true a2coder/pretend