Turn any email into a webhook
Inbox Bridge gives you a unique email address that instantly forwards every message to your API as a structured JSON payload. No email servers. No polling. Just webhooks.
Free forever on the starter tier. No credit card required.
Migrating? Compare to CloudMailin.
How Inbox Bridge works
Go from zero to receiving webhook payloads in under a minute.
Create a bridge
Get a unique email address and configure your webhook endpoint in seconds.
Receive emails
Create a forwarding rule or use the address directly. We handle all inbound processing.
Get webhooks
Structured JSON payloads hit your endpoint instantly with automatic retries on failure.
Example webhook payload
A clean JSON payload posted to your webhook for every inbound email.
{
"id": "clx9k2p7a0001abcd",
"receivedAt": "2026-05-12T14:23:01.000Z",
"from": { "email": "stripe@stripe.com", "name": "Stripe" },
"to": [{ "email": "a1b2c3d4@webhook.inboxbridge.io", "name": "" }],
"cc": [],
"bcc": [],
"replyTo": null,
"subject": "Payment received for invoice INV-4829",
"date": "2026-05-12T14:23:00.000Z",
"textBody": "Your payment of $249.00 was successful...",
"htmlBody": "<p>Your payment of $249.00 was successful...</p>",
"attachments": [
{
"name": "receipt.pdf",
"contentType": "application/pdf",
"contentLength": 18244,
"contentId": null,
"downloadUrl": "https://inboxbridge.io/attachments/clx1a2b3?token=…"
}
]
}Built for reliability
Everything you need to pipe email data into your application with confidence.
Emails are parsed and forwarded to your webhook endpoint in seconds, not minutes.
Failed deliveries are retried with exponential backoff. Never miss a payload.
Payloads are encrypted in transit. Hash-based email addresses keep your endpoints private.
Every email is parsed into a clean JSON payload — subject, body, headers, attachments, and metadata.
See the status, response code, and duration of every delivery attempt — and replay any delivery with one click.
Files up to 35MB are stored encrypted and delivered as secure, expiring download links — no giant base64 blobs hitting your endpoint.
New to this? Learn how email-to-webhook works.
Use cases
Anywhere email meets code, Inbox Bridge fits.
Inbound lead capture
Forward form submission emails to your CRM or database via webhook. No parsing scripts needed.
Transactional email monitoring
Track delivery receipts, bounce notifications, and out-of-office replies in real time.
Support ticket ingestion
Pipe customer emails directly into your ticketing system or Slack channel.
IoT and device alerts
Machines and sensors that email alerts? Turn them into structured data your backend can act on.
Invoice and document processing
PDFs, receipts, and reports arrive as secure download links — feed them straight into your parser or approval workflow.
AI agents that read email
Give your agent an inbox. Clean JSON plus attachment links, ready to drop into an LLM pipeline — no IMAP required.
Simple, transparent pricing
Start free. Scale as you grow.
- 1 bridge
- 1,000 emails/month
- 3 retries
- No credit card required
- Upgrade anytime
- 5 bridges
- 5,000 emails/month
- 5 retries
- Manual replay
- JSON viewer
- Attachment downloads (up to 35MB)
- 15 bridges
- 10,000 emails/month
- 10 retries
- Everything in Starter
- Priority support
Need something different? Email us
Frequently asked questions
How is this different from SendGrid Inbound Parse or Mailgun Routes?
Inbox Bridge focuses on one job — turning inbound email into a reliable JSON webhook — and gives you a dashboard, retries with exponential backoff, one-click delivery replay, and per-bridge delivery logs out of the box. SendGrid and Mailgun bundle inbound parsing inside large email platforms; for a small team that just needs the webhook, the surface area and pricing here are simpler.
Do I get a custom domain, or just @webhook.inboxbridge.io?
Every bridge gets a unique hash-based address at webhook.inboxbridge.io (for example a1b2c3d4@webhook.inboxbridge.io). Custom domains are not part of the current plans — most teams either point a forwarding rule at the bridge address or use the address directly.
What happens if my webhook endpoint is down?
A non-2xx response moves the delivery into a retry queue. Inbox Bridge retries with exponential backoff (30s, 60s, 2m, and so on, with 20% jitter) up to your plan’s retry limit. You can also manually replay any delivery from the bridge detail page once your endpoint is healthy.
How are attachments delivered?
Every attachment arrives in the JSON payload as an object with its filename, content type, and size. On paid plans we also store the file and add a secure, time-limited downloadUrl — so you pull the bytes only when you need them instead of bloating every webhook. Free bridges receive attachment metadata only.
Is there a free tier?
Yes. The Free plan covers 1 bridge, 1,000 emails per month, and 3 retry attempts. No credit card required — sign up and you can be receiving webhooks in a couple of minutes.
How quickly does an email become a webhook delivery?
Typically a few seconds end to end. Postmark accepts the inbound email, Inbox Bridge parses it and POSTs the JSON payload to your endpoint immediately. There is no polling delay.
Stop building email infrastructure
Let Inbox Bridge handle parsing, delivery, and retries so you can focus on what your app does with the data.
