Take a screenshot (PNG/JPEG/WebP) of a webpage or raw HTML with the Browserless /screenshot REST API

Documented steps

1. POST https://production-sfo.browserless.io/screenshot?token=YOUR_API_TOKEN (regional hosts: production-lon.browserless.io, production-ams.browserless.io); auth is the ?token= query parameter.
2. Set Content-Type: application/json and send { "url": "https://example.com/", "options": { "fullPage": true, "type": "png" } } - or send "html" instead of "url" to render inline markup. Never send both url and html in one request.
3. options mirrors Puppeteer's screenshot options: fullPage, type (png/jpeg/webp), quality, clip, viewport, deviceScaleFactor; use addScriptTag/addStyleTag arrays to inject JS/CSS before capture.
4. Add shared request-configuration fields as needed: gotoOptions {waitUntil, timeout}, waitForSelector/waitForTimeout/waitForFunction to wait on dynamic content, rejectResourceTypes/rejectRequestPattern to block resources, bestAttempt:true to return partial results instead of erroring on timeout.
5. Tune the browser launch via query params on the same URL: stealth=true, proxy=residential|datacenter, blockAds=true, timeout=<ms> (default 60000).
6. Read the response as a binary buffer (response.arrayBuffer()) - Content-Type is image/png|jpeg|webp per options.type - and write it to a file. Ref: https://docs.browserless.io/rest-apis/screenshot