Render-Blocking Resource Detector API

Identify critical CSS stylesheets and synchronous scripts in HTML head blocking the browser's first contentful paint.

Environment

Environment	Base URL
Production	`https://api.sadafiles.com/v1`

There is one environment and no sandbox, so every request here is real and counts toward your limits.

Request

POSThttps://api.sadafiles.com/v1/seo-tools/render-blocking-detector

Content type: application/json
Auth: No key needed
Rate weight: 2 units
Web tool: Use Render-Blocking Resource Detector without code

Parameters

Send the fields your check needs as JSON.

Name	Type	Default	Allowed
`mode`	string	url	url, paste
`url`	string	—	—
`html`	string	—	—

Response

A JSON report. Run it below to see a real one.

Try it yourself!

This sends a real request. The URL must be public.

Body

urlstringrequired

This route needs no key. Requests count against your IP's fair-use limit.

1curl -X POST "https://api.sadafiles.com/v1/seo-tools/render-blocking-detector" \2  -H "Content-Type: application/json" \3  -d '{"url":"https://example.com"}'

Developer docs