Kivel vs Webhook.site
Both give a callback a temporary destination with a custom response. Kivel inboxes are private by default, forward to your server on Pro, and sit next to email inboxes, mocks, files, utilities and MCP for agents. Webhook.site adds a larger automation platform with workflows and schedules.
Why teams pick Kivel.
Choose Kivel when a disposable inbox is one part of a development workflow: capture a callback, format its JSON, test a mock response, or let an MCP agent inspect the result.
- You want captured payloads private unless you choose public access
- The test fits within an hour, or seven days with a free account
- You also need a mock API, file share, or JSON formatter in the same session
- An MCP agent should create and read the inbox
Choose Webhook.site when you need custom actions, workflows, schedules or custom domains. Its documentation covers automation well beyond request inspection.
- A callback may arrive weeks later on a free URL
- You want custom actions or workflows on each request
- You need schedules or a custom domain
Every Kivel plan includes webhook and email inboxes, mock APIs and MCP servers, files, memory, monitors and approvals for AI agents over one MCP connection, plus 174 tools in all. Free to start; Pro is $2 a month.
The differences that matter.
| Area | Kivel | Webhook.site |
|---|---|---|
| Main workflow | Temporary testing resources and browser utilities in one toolbox. | Webhook and email inspection plus workflow automation and custom actions. |
| Receiver and history access | Private receiver by default; separate caller and inspection credentials. Public reception is an explicit choice. | Free history is accessible to people who know the URL ID. Paid account URLs are protected by login. |
| Anonymous history | One-hour starting lifetime; up to 100 requests or 1 MiB per inbox, 100 KiB per body. | Free URLs expire after seven days and accept up to 100 requests or emails, according to its FAQ. |
| Response to the sender | Any status from 200 to 599, a JSON, text or XML body, X- headers and a delay of up to 5 seconds. | The default response can be edited on free URLs. |
| Related work | Owned email inboxes when configured, forwarding with retries on Pro, replay, mock APIs, file shares, utilities and MCP tools such as wait_for_webhook. | Forwarding, schedules, CSV export, and email workflows on paid plans. |
Good to know.
Kivel does not run workflows, custom actions or schedules, and forwarding to a public URL is a Pro feature that skips binary bodies. Its one-hour anonymous lifetime (up to seven days with a free account) covers a test session and most delayed callbacks.
You can start without an account, and a free account keeps resources for up to seven days. See the published allowances for storage, rate limits and retention.
Frequently asked questions
Is Webhook.site free?
Yes, Webhook.site has free URLs, which its FAQ says expire after seven days and accept up to 100 requests or emails. Forwarding, custom actions, and schedules are listed as subscription features.
Are Webhook.site requests private?
Not on free URLs. Its FAQ says free URL data is accessible to anyone who knows the URL ID, while URLs on a paid subscription are protected with login.
What is a private alternative to Webhook.site for testing webhooks?
Kivel creates inboxes that are private by default. Senders need an access token and reading history needs a separate inspection credential, so knowing the URL alone is not enough.
How long does a Kivel webhook inbox last?
Anonymous inboxes start with a one-hour lifetime and hold up to 100 requests or 1 MiB. Free accounts can keep resources for up to seven days, with up to 1,000 requests or 10 MiB per inbox.
Can Kivel forward webhooks to my server?
Yes. On Pro and Team, an inbox can forward every captured request to a public URL, with retries after server errors and a delivery log. Any captured request can also be replayed to a URL from the inbox page.
Check the sources.
Reviewed on against official documentation. Features can change. This page is written by Kivel and is not an endorsement by Webhook.site.