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Simplifying API Debugging

Inspect API requests and webhook events in real-time.

No signup or account required — start instantly.

No more digging through logs or guessing what's happening — instantly see requests & responses. Easily expose your local API to test integrations and capture webhook events from remote systems.

Inspectr App

Everything you need for API debugging

Inspect API Requests

View headers, query parameters, request bodies, and response details in real-time.

Analyze Webhook Events

Capture and review webhook payloads from third-party services with ease.

OpenAPI Initiative icon

Mock APIs from OpenAPI

Generate a full mock backend from any OpenAPI spec in seconds.

Real-time Logging

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

History & Replay

Review past requests with filtering and search, replay them as needed.

Public Exposure

Expose local services with secure, custom subdomains for testing and demos.

Get Started with 1 command

1. Start Your Local Service

Run your app locally on http://localhost:3000.

$

npx @inspectr/inspectr --backend="http://localhost:3000"

2. Launch Inspectr

Start Inspectr and expose your service.

3. Open the Dashboard

Visit http://localhost:4004 to view the Inspectr UI.

$

curl http://localhost:8080

4. Make API Requests

Send requests to http://localhost:8080 and see them live.

Simple for every Development Workflow

Debugging During Development

  • Real-time request monitoring and inspection
  • Quick identification of malformed requests
  • Error correlation with request data

Webhook Testing

  • Real-time webhook monitoring
  • Expose local endpoints for webhook testing
  • Capture and replay webhook events

OpenAPI Mocking

  • Zero coding — mock service auto-generated from OpenAPI
  • Test edge cases: errors, timeouts, large payloads
  • OpenAPI Initiative iconPrototype against your API spec

Local Service Exposure

  • Secure public endpoints for local services
  • Custom subdomains for easy sharing
  • Perfect for AI services and demos

Frontend Development

  • Zero-config integration
  • Transparent request debugging
  • Complete request history

Response Simulation

  • Simulate network latency and timeouts
  • Force HTTP status codes (e.g. 404, 500)
  • Pick specific OpenAPI examples on the fly