POST/v1/email/messages
Sandbox"to": [ "bounce@messagebird.dev" ]
202Accepted
event.typeemail.bounced
POST/v1/email/messages
Sandbox"to": [ "bounce@messagebird.dev" ]
202Accepted
event.typeemail.bounced
Communications for developers
Reach your customers, wherever they are.
Email, SMS, WhatsApp, Apple Messages, and Voice.
Trusted by engineering and product teams
shipping at global scale.
From prompt to delivered.
Send messages and check delivery from your code, terminal, or AI assistant.
Catch integration issues early and ship with confidence.
Simulate failure paths in the sandbox, verify signed webhooks, and retry timed-out requests without sending duplicates.
Build templates and workflows in the dashboard.
Draft WhatsApp templates, trigger event-driven automations, map out call flows, and reply to customer emails from one workspace.
Track delivery and call outcomes across your channels.
Monitor delivery rates in real time, break down bounces and carrier failures, and trace any dip to the exact server response, network, or call leg.
Personalize your campaigns from your contact profiles.
Group contacts into reusable audiences and personalize broadcasts with each recipient's profile attributes, from first name and city to membership tier.
Start with one channel and expand as you grow.
Add new channels, verification, and connectivity in the same workspace, using the same API keys, webhooks, and SDKs.
Deliver transactional emails, run campaigns, and handle replies.
SMS
Send global text alerts, campaigns, and two-way replies.
Send approved templates, rich media, and two-way support chats.
Apple Messages
Support customers, schedule appointments, and take Apple Pay in Messages.
Voice
Place programmable calls, run IVR menus, and connect SIP trunks.
Verify
Confirm signups and logins with OTPs and automatic channel fallback.
Lookup
Validate phone numbers and emails before you pay to send.
Mailbox
Provision dedicated email inboxes for AI agents and workflows.
eSIM
Issue travel data plans and mobile connectivity in your app.
Realtime
Stream live updates, chat, and presence over managed WebSockets.
Scale without losing control.
Separate production and sandbox traffic into dedicated workspaces, scope API keys to the exact channels each service or agent needs, and track permission changes in the audit log.