Testing Tools

API Rate Limiter Tester

Configure concurrent request bursts to observe throttling behaviour from your API. Designed for staging environments—be considerate before hitting production.

Request configuration

Set your endpoint, method, headers, and payload. Requests execute entirely in your browser—no proxy required.

Target URL

MethodRun in safe mode (simulate responses without hitting the network)

Headers

Total requests

Safe range 1–200.

Concurrency

Safe range 1–20.

Requests per burst

Number of requests per burst. Safe range 1–50.

Delay between bursts (ms)

Request timeout (ms)

Use responsibly. Obtain permission before targeting production APIs. Safe mode is enabled by default to simulate responses without hitting your server.

Metrics

Live summary of the current run.

Sent

Completed

Success

Client error

Server error

Throttled (429)

Cancelled

Tip

Monitor your API’s dashboards while this tool runs. Compare throttled counts here against server-side logs to confirm rate limiter behaviour.

Request log

Latest entries are shown first. Logs are capped at 200 entries in the UI.

No activity yet. Start a test to populate logs.

Testing checklist

Start in safe mode to verify configuration before hitting a live endpoint.

Increase concurrency gradually and observe when throttling begins.

Run multiple scenarios (steady, bursts, spikes) to mirror real-world traffic.

Need more load?

This tester focuses on rate limit behaviour, not full-scale load. For heavy traffic simulation, pair it with dedicated tools like k6 or Artillery.

Coming soon: Web Worker mode to push higher concurrency and visual charts for latency distribution.