Rendex/Docs
Get API Key

Quick Start

Get your first screenshot in under 5 minutes. Rendex captures any webpage as a PNG or JPEG with a single API call.

1. Get Your API Key

Sign in to your Rendex dashboard. An API key is automatically generated for you on your first visit.

2. Make Your First Call

Use any HTTP client to capture a screenshot. Replace YOUR_API_KEY with your actual key.

cURL

curl -X POST https://api.rendex.dev/v1/screenshot \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"url": "https://example.com"}' \
  --output screenshot.png

Python

import requests

response = requests.post(
    "https://api.rendex.dev/v1/screenshot",
    headers={"Authorization": "Bearer YOUR_API_KEY"},
    json={"url": "https://example.com"}
)

with open("screenshot.png", "wb") as f:
    f.write(response.content)

JavaScript (Node.js)

const response = await fetch("https://api.rendex.dev/v1/screenshot", {
  method: "POST",
  headers: {
    "Authorization": "Bearer YOUR_API_KEY",
    "Content-Type": "application/json",
  },
  body: JSON.stringify({ url: "https://example.com" }),
});

const buffer = await response.arrayBuffer();
// Save to file or process the image

Go

payload := strings.NewReader(`{"url": "https://example.com"}`)
req, _ := http.NewRequest("POST", "https://api.rendex.dev/v1/screenshot", payload)
req.Header.Set("Authorization", "Bearer YOUR_API_KEY")
req.Header.Set("Content-Type", "application/json")

resp, _ := http.DefaultClient.Do(req)
defer resp.Body.Close()
data, _ := io.ReadAll(resp.Body)
os.WriteFile("screenshot.png", data, 0644)

3. Get JSON Response (Base64)

Use the /v1/screenshot/json endpoint to get the image as base64-encoded JSON instead of binary:

curl -X POST https://api.rendex.dev/v1/screenshot/json \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"url": "https://example.com"}'

Response:

{
  "success": true,
  "data": {
    "image": "iVBORw0KGgo...",
    "contentType": "image/png",
    "url": "https://example.com",
    "width": 1280,
    "height": 800,
    "format": "png",
    "bytesSize": 145832,
    "capturedAt": "2026-03-26T12:00:00.000Z"
  },
  "meta": {
    "requestId": "req_abc123",
    "timestamp": "2026-03-26T12:00:00.000Z",
    "usage": { "credits": 1, "remaining": 499 }
  }
}

Next Steps