> ## Documentation Index
> Fetch the complete documentation index at: https://docs.webhook.co/llms.txt
> Use this file to discover all available pages before exploring further.

# Introduction

> Receive, inspect, replay-to-localhost, and reliably deliver webhooks.

webhook.co gives you a free, permanent, signed webhook URL with payload inspection and one-command
replay-to-localhost — then grows with you into inbound ingestion (verify → dedup → retry → replay) and
outbound delivery. Every capability is reachable identically across the **CLI, API, web, and MCP**.

Signing and verification follow the [Standard Webhooks](https://www.standardwebhooks.com/) spec, for both
send and receive.

## The API

The REST API lives at `https://api.webhook.co`. It's a small, predictable surface — every endpoint is
described by a machine-readable OpenAPI 3.1 document you can browse in the **[API reference](/api-reference/endpoints/list-endpoints)**
or fetch yourself:

```sh theme={null}
curl https://api.webhook.co/openapi.json
```

That same document is what the SDKs and the API reference on this site are generated from, so they never
drift from the real API.

## SDKs

Official, typed SDKs in three languages — each with the same hardening built in (bearer auth, bounded
retries with jitter, cursor pagination, idempotency, and secret redaction):

<CardGroup cols={3}>
  <Card title="TypeScript" href="/sdks/typescript">
    `npm install @webhook-co/sdk`
  </Card>

  <Card title="Python" href="/sdks/python">
    `pip install webhook-co`
  </Card>

  <Card title="Go" href="/sdks/go">
    `go get github.com/webhook-co/webhook-go`
  </Card>
</CardGroup>

## Next

<CardGroup cols={2}>
  <Card title="Quickstart" href="/quickstart" icon="rocket">
    Create an endpoint and list its events in a few lines.
  </Card>

  <Card title="Authentication" href="/authentication" icon="key">
    How the `whk_` API key works.
  </Card>
</CardGroup>