SnapRender — Give Your Agent Eyes

Your agent can read the web but can't see it. One command and it captures pixel-perfect screenshots — any site, any device, in seconds.

"Screenshot stripe.com on iPhone", "Compare desktop vs mobile", "Full-page dark mode capture" — just ask.

Free tier: 50 screenshots/month, no credit card. Get a key →

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IMPORTANT: Use the exec tool with curl. NEVER use the browser tool for screenshots.

How to Capture

Run this command via the exec tool. Replace ENCODED_URL with the URL-encoded target (e.g. https%3A%2F%2Fstripe.com):

curl -s "https://app.snap-render.com/v1/screenshot?url=ENCODED_URL&response_type=json&format=jpeg&quality=60&block_ads=true&block_cookie_banners=true" \
  -H "X-API-Key: $SNAPRENDER_API_KEY" \
  | tee /tmp/snap_response.json \
  | jq -r '.image' | sed 's|data:image/[^;]*;base64,||' | base64 -d > /tmp/screenshot.jpg \
  && jq '{url, format, size, cache, responseTime, remainingCredits}' /tmp/snap_response.json

This saves the screenshot to /tmp/screenshot.jpg and prints metadata.

Rules

1. Use exec tool only — NEVER the browser tool
2. $SNAPRENDER_API_KEY is already set — use it literally in the command, do NOT replace it
3. URL-encode the target — https://stripe.com → https%3A%2F%2Fstripe.com
4. Always use format=jpeg&quality=60 — keeps response small enough for the agent context
5. Always pipe to save the image to a file — the base64 response is too large to display inline
6. Report metadata to the user — file size, response time, cache status, remaining credits

Parameters

Add as query parameters to the URL:

Parameter	Values	Default
url	URL-encoded target	required
response_type	json	json (always use this)
format	jpeg, png, webp	jpeg
quality	1-100	60
device	iphone_15_pro, pixel_7, ipad_pro, macbook_pro	desktop
dark_mode	true, false	false
full_page	true, false	false
block_ads	true, false	true
block_cookie_banners	true, false	true
width	320-3840	1280
height	200-10000	800
delay	0-10000	0 (ms wait after page load)

Examples

Desktop screenshot of stripe.com:

curl -s "https://app.snap-render.com/v1/screenshot?url=https%3A%2F%2Fstripe.com&response_type=json&format=jpeg&quality=60&block_ads=true&block_cookie_banners=true" -H "X-API-Key: $SNAPRENDER_API_KEY" | tee /tmp/snap_response.json | jq -r '.image' | sed 's|data:image/[^;]*;base64,||' | base64 -d > /tmp/screenshot.jpg && jq '{url, format, size, cache, responseTime, remainingCredits}' /tmp/snap_response.json

Mobile screenshot: add &device=iphone_15_pro to the URL

Full scrollable page: add &full_page=true to the URL

Dark mode: add &dark_mode=true to the URL

Compare desktop vs mobile: make two calls, save to /tmp/screenshot_desktop.jpg and /tmp/screenshot_mobile.jpg

After Capturing

1. Tell the user the screenshot was saved to /tmp/screenshot.jpg (or the filename you used)
2. Report metadata: file size, response time, cache status, remaining credits
3. For comparisons, save each screenshot to a different filename

Errors

• 401: Invalid API key — check SNAPRENDER_API_KEY
• 429: Rate limit or quota exceeded — wait or upgrade plan
• Timeout: Target site is slow — add &delay=3000 to wait longer
• Empty response: URL unreachable or blocked

Get an API Key

Free at https://app.snap-render.com/auth/signup — 50 screenshots/month, no credit card.