# API Rate Limit and Retry Behavior Tester

**Use case:** 

Test how an API behaves under retry pressure before building retry logic into your own client. Point it at a target that returns transient errors and see how many attempts it takes, with exponential backoff, jitter, and a throttle so you don't overload a rate-limited endpoint. Useful for validating resilience against flaky APIs or confirming your service triggers the right retry codes.

## Input

```json
{
  "requests": [
    {
      "id": "simulated-error",
      "label": "Simulated 500 error",
      "url": "https://httpbin.org/status/500"
    }
  ],
  "curlCommand": "",
  "maxConcurrency": 5,
  "requestsPerSecond": 2,
  "timeoutSecs": 30,
  "maxRetries": 5,
  "retryOnStatusCodes": [
    500,
    502,
    503
  ],
  "followRedirects": true,
  "maxRedirects": 5,
  "parseJson": true,
  "maxResponseBytes": 1000000,
  "saveOversizedBodyToKeyValueStore": true,
  "failOnErrorStatus": false,
  "expectedStatusCodes": [],
  "authType": "none",
  "authBasicUsername": "",
  "proxyConfiguration": {
    "useApifyProxy": false
  },
  "callbackUrl": ""
}
```

## Output

```json
{
  "label": {
    "label": "Label",
    "format": "string"
  },
  "method": {
    "label": "Method",
    "format": "string"
  },
  "requestedUrl": {
    "label": "URL",
    "format": "string"
  },
  "statusCode": {
    "label": "Status",
    "format": "number"
  },
  "ok": {
    "label": "OK",
    "format": "boolean"
  },
  "isBroken": {
    "label": "Broken",
    "format": "boolean"
  },
  "durationMs": {
    "label": "Duration (ms)",
    "format": "number"
  },
  "attempts": {
    "label": "Attempts",
    "format": "number"
  },
  "bodyTruncated": {
    "label": "Truncated",
    "format": "boolean"
  },
  "errorMessage": {
    "label": "Error",
    "format": "string"
  }
}
```

## About this Actor

This example demonstrates how to use [HTTP Request Runner: Bulk API Calls with Retries](https://apify.com/getascraper/http-request-runner.md) with a specific input configuration. Visit the [Actor detail page](https://apify.com/getascraper/http-request-runner.md) to learn more, explore other use cases, and run it yourself.


## How to integrate an Actor?

If asked about integration, you help developers integrate Actors into their projects.
You adapt to their stack and deliver integrations that are safe, well-documented, and production-ready.
This Task's input is already configured above — use it as-is rather than inventing a new one.

- **AI agents and MCP clients** — the [Apify MCP server](https://docs.apify.com/integrations/mcp.md) at `https://mcp.apify.com` (remote, streamable HTTP, OAuth on first use).
- **Agentic workflows and local Actor development** — [Agent Skills](https://apify.com/.well-known/agent-skills/index.json) with the [Apify CLI](https://docs.apify.com/cli/docs.md): `npm install -g apify-cli`, then `apify login`.
- **JavaScript/TypeScript projects** — the official [JS/TS client](https://docs.apify.com/api/client/js/docs.md): `npm install apify-client`.
- **Python projects** — the official [Python client](https://docs.apify.com/api/client/python/docs.md): `pip install apify-client`.
- **Any other language** — the [REST API](https://docs.apify.com/api/v2.md).

For full API examples (JavaScript, Python, CLI, MCP, OpenAPI), see this Task's Actor page: https://apify.com/getascraper/http-request-runner.md

For more details, see Apify documentation as [Markdown index](https://docs.apify.com/llms.txt) and [Markdown full-text](https://docs.apify.com/llms-full.txt).