Webhooks in, typed events out.

Relay types every payload, retries failed deliveries and replays any event.

Start free See a retry

$curl --json @evt_1042.json https://relay.example.com/in/billing

Free up to 100,000 events a month.

{"…Raw webhook
invoice.paidTyped event
503 ┄┄Retry, waiting

One stream for every provider

Every webhook lands here typed, with its delivery state beside it.

Relay EventsSourcesTypesReplays Live

type:invoice.* All sources Last hour

TimeEventSourceStatus

09:42:31order.shippedshop.example.comDelivered

09:42:18invoice.paidbilling.example.comRetrying, attempt 2

09:41:55customer.updatedcrm.example.comDelivered

09:41:40order.createdshop.example.comDelivered

09:41:12refund.issuedbilling.example.comDelivered, attempt 3

09:40:57contact.mergedcrm.example.comFailed, 410

09:40:31order.createdshop.example.comDelivered

09:40:12invoice.paidbilling.example.comDelivered

09:39:40form.submittedforms.example.comDelivered

invoice.paidevt_1042 TypePayloadAttempts Replay

// inferred from evt_1042
type InvoicePaid = {
  type: "invoice.paid";
  id: string;
  amount: number;
  currency: "GBP";
  paid_at: string;
};

109:42:18503 209:42:48next

Four jobs, one stream

What Relay does between your providers and your endpoint.

Relay reads each payload and gives every field a type.

evt_1042Received from billing.example.comInferred by Relay

evt_1042.json

{
  "type": "invoice.paid",
  "id": "evt_1042",
  "amount": 4800,
  "currency": "GBP",
  "paid_at": "2026-10-08T09:42:16Z"
}

invoice-paid.ts

// inferred from evt_1042
export type InvoicePaid = {
  type: "invoice.paid";
  id: string;
  amount: number;
  currency: "GBP";
  paid_at: string;
};

When your endpoint is down, Relay holds evt_1042 and tries again: a 503, a timeout, then 200 OK.

503Service Unavailable in 2.1 sAttempt 1, 09:42:18
10.0 sNo answer, timed outAttempt 2, 09:42:48
200OK in 182 msAttempt 3, 09:43:48

Send any past event to your endpoint again, straight from the stream.

Replay

invoice.paidevt_1042

Event: evt_1042, invoice.paid
Destination: https://example.com/hooks/billing

Sends the stored payload as it arrived

09:58:14Replayed evt_1042200 OK164 ms
09:31:02Replayed evt_0987200 OK201 ms
08:12:40Replayed evt_0961200 OK176 ms

$curl --json @evt_1042.json https://example.com/hooks/billing

One address for each provider. Every webhook lands in one stream, whoever sent it.

Source	Posts to	Event types seen	Last event
shop.example.com	`relay.example.com/in/shop`	`order.created` `order.shipped`	`09:42:31`
billing.example.com	`relay.example.com/in/billing`	`invoice.paid` `refund.issued`	`09:42:18`
crm.example.com	`relay.example.com/in/crm`	`customer.updated` `contact.merged`	`09:41:55`
forms.example.com	`relay.example.com/in/forms`	`form.submitted`	`09:39:40`

All four deliver to https://example.com/hooks

100,000 events a month, free.

Start free

Your handler gets a type

Answer 200 and the event is delivered. Anything else, and Relay tries again.

app/hooks/billing/route.tsYour endpoint

import type { InvoicePaid } from "./invoice-paid";

export async function POST(req: Request) {
  const event = (await req.json()) as InvoicePaid;
  console.log(event.id, event.amount, event.currency);
  return new Response(null, { status: 200 });
}

The type file is the one Relay inferred from evt_1042.