Sluice documentation

Send webhooks your customers can trust.

Guides, API reference and release notes for Sluice, the webhook delivery API. New here? The quickstart takes about five minutes.

Search the docs, for example: retry schedule

Popular

Verify signatures

Quickstart

Embed the customer portal

Retry schedule

POST

hooks.harborsupply.com/billing

200 OK

Sluice-Id: evt_2Vd9kQ

Sluice-Timestamp: 1757944931

Sluice-Signature: t=1757944931,v1=5f2c9a0b41e7

{
  "type": "invoice.paid",
  "data": {
    "invoice": "inv_8841",
    "amount": 12900
  }
}

Attempt 1

503 Service Unavailable

0 s

Attempt 2

200 OK in 142 ms

+30 s

Get started

Quickstart

Create an app, add an endpoint and send a signed webhook in about five minutes.

Read the quickstart →

Concepts

How Sluice works

Apps, endpoints, events and attempts, and how one event becomes many deliveries.

Read core concepts →

Reference

API reference

Every endpoint with its parameters, a curl example and the response you get back.

Open the reference →

Browse

Browse by topic

Six sections, from the first request to production.

Get started

What Sluice does and your first webhook.

Sending events

Event types, payloads and safe retries.

Define event types

Send an event

Idempotency keys

Send events in batches

Endpoints

Where webhooks go and what they look like.

Add an endpoint

Embed the customer portal

Transform payloads

Security

Signatures, secrets and network rules.

Verify signatures

Rotate signing secrets

IP allowlist

Delivery

Retries, alerts, replays and limits.

SDKs

Official libraries for Node.js, Python and Go.

Node.js

Python

Changelog

What shipped lately

Every change to the API, the portal and the libraries, with the date it went live.

All changes →

Sep 15, 2026

v3.14

Improved

The customer portal follows dark mode

Embedded portals now match the light or dark mode of the page around them.

Sep 8, 2026

v3.13

New

Replay everything since a point in time

One call replays every failed delivery for an endpoint since a timestamp.

Sep 1, 2026

v3.12

Improved

Log search is four times faster

Searching 90 days of attempts by event ID or status now returns in under a second.

Help center

Questions and answers

Billing, accounts and the delivery problems we see most, answered by the team.

Browse answers →

Status

All systems operational

Live status for the API, deliveries and the portal, with 90 days of history.

View status →

Support

Talk to a person

Write to support@sluicehq.dev. Someone who works on the API replies within one business day.

Email support →