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It's a split decision.
Choose Webhook.site to receive and inspect incoming webhooks, emails and DNS lookups through a hosted endpoint, with visual workflows and request forwarding. Choose Yaak to send requests across HTTP, GraphQL, gRPC, WebSocket and SSE, keeping work local and sharing it through Git. They solve different jobs: Webhook.site is an inbound capture and automation service; Yaak is a desktop API client with CLI and MCP access for agents.
01Side by side
| Webhook.site | Yaak | |
|---|---|---|
| Pricing model | Hosted tiers priced by URLs, history, schedules and users | Annual individual/team licenses; $349 individual lifetime option |
| Free access | No signup; URL expires after one week, 50 requests | Free plan and 30-day trial; free limits unspecified |
| Open source and licence | No open-source licence stated | MIT-licensed source; inspect and build it |
| Deployment model | Hosted capture service | Local-first desktop app; no automatic cloud sync |
| Platforms | Web, Windows, Mac, Linux | macOS, Windows, Linux |
| API protocols | HTTP, email and DNS capture; REST API | HTTP, GraphQL, gRPC, WebSocket and SSE |
| Integrations | Google Sheets, Excel, Slack, S3, Dropbox, SFTP | Git, MCP, Postman, Insomnia, Bruno imports |
| Data portability | CSV export and REST API | Git-managed YAML requests and Git history |
Webhook.site Choose Webhook.site if
- Choose Webhook.site if you need to inspect inbound webhooks without signup.
- Choose Webhook.site if you need to capture email or DNS activity.
- Choose Webhook.site if visual workflows should forward or respond to requests.
Yaak Choose Yaak if
- Choose Yaak if you need a desktop client for multiple API protocols.
- Choose Yaak if your team shares requests through Git.
- Choose Yaak if agents need CLI or MCP access to existing requests.
02Pricing at real usage
Both have a free entry point, but they price different things. Webhook.site’s no-signup URLs expire after one week and retain up to 50 requests. Basic costs $9 monthly or $90 annually ($7.50 per month): one URL and 1,000-request history. Pro costs $19 monthly or $190 annually ($15.83 per month) for 50 URLs and 10,000-request history. Enterprise is $69 monthly or $699 annually ($58.25 per month), with unlimited URLs, 100,000-request history and 10 included users. Each paid plan lists unlimited requests.
Yaak lists a free plan and a 30-day trial; its free-plan limits are unspecified. Individual Annual is $79 billed annually ($6.58 per month), for one person and up to three devices. Individual Lifetime costs $349 once. Business is $149 per user, billed annually ($12.42 per user per month), with transferable licenses, SSO and provisioning. Yaak charges for licenses, not request volume.
03API, SDKs and integration
Webhook.site is a hosted capture endpoint for HTTP requests, emails and DNS lookups. Its REST API lets you manage the service programmatically; the site links to documentation and an API reference. It lists no language-specific SDK. For custom actions, developers can use WebhookScript or JavaScript, and the CLI forwards captured requests to localhost or a private network. Listed integrations include Google Sheets, Excel, Slack, S3, Dropbox, SFTP, push notifications and databases.
Yaak is a desktop client for making HTTP, GraphQL, gRPC, WebSocket and SSE requests directly to servers. Its documentation covers the app, CLI and MCP plugin. The CLI can work with existing requests, and yaak agent install installs the CLI skill. Plugins extend authentication, importers and template functions. Import options include Postman, Insomnia, Bruno, OpenAPI, Swagger and curl. The MCP plugin supports clients including Claude and Cursor.
04Open source, self-hosting and lock-in
Yaak’s source is MIT-licensed, and the desktop app stores work locally without an account or automatic cloud sync. Requests use YAML files managed through Git, so teams can branch, diff and share them with existing Git permissions. Optional encryption protects shared secrets. Yaak’s local app is not a hosted server deployment; its source can be inspected and built.
Webhook.site is presented as a hosted service. The vendor does not state an open-source licence or self-hosted deployment option. It offers CSV export and a REST API, while account plans add request history, workflows and other hosted features. Those export paths can help retrieve data, but teams should check how workflow configuration and retained request history would move before relying on them as portable assets.
Questions people ask
Are Webhook.site and Yaak direct alternatives?
They address different parts of API development. Webhook.site provides a hosted destination for inspecting incoming HTTP requests, emails and DNS lookups. Yaak is a desktop client for sending requests to APIs and managing them locally. A team may use both: one to inspect inbound traffic, the other to build and run requests.
Can Webhook.site forward requests to a local server?
Yes. Webhook.site’s CLI forwards captured requests to localhost or a private network. Its free URLs expire after one week and keep up to 50 requests; paid plans list unlimited requests and add different URL, history and workflow capacities.
Can AI agents use Yaak requests?
Yes. Yaak provides a CLI and an MCP server plugin so agents can work with existing requests. The homepage names Claude and Cursor as MCP clients, and says changes made through the CLI show up in the desktop app.
Can either product be self-hosted?
Webhook.site is presented as a hosted service, with no self-hosted deployment option stated by the vendor. Yaak is a local desktop app with MIT-licensed source that can be built, but it is not described as a self-hosted server. Confirm deployment requirements with the vendor if they are mandatory.