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Spin up a mock backend from any OpenAPI—zero config.

Inspectr captures API calls and webhooks live in your terminal or UI. Instantly generate a mock server from your OpenAPI spec—perfect for SDK dev, webhook tests, or debugging frontend requests.

  1. Launch Inspectr with a Mock Backend from OpenAPI

    $

    npx @inspectr/inspectr --mock-backend="https://inspectr.dev/demo/hello.openapi.yaml"

    Generates a mocked API on http://localhost:8080

  2. Inspect & Iterate

    Open the UI at http://localhost:4004 to watch requests live, replay history, and refine your spec.

Why Inspectr?

Open Source

Install the OSS Inspectr binary — no signup or trial needed.

Zero-Config Mocking

Spin up a mock server from any OpenAPI spec with one command.

Real-time Logging

Monitor incoming requests as they happen in your terminal and UI.

Public Exposure

Expose local services with secure custom domains for testing.