har-derived-api-client

Record the site's XHR traffic to a HAR file with Playwright while performing the target interaction, then run the derivation script to group requests by endpoint. It prints the method, URL template, query params, headers, and body samples needed to replay the call over plain HTTP.

Use the CDP capture script with the browser's CDP endpoint, since Playwright's record_har_path only works on locally launched browsers. It attaches via connect_over_cdp and assembles the HAR from request and response events without closing the remote browser.

Many sites reject default library User-Agents like python-requests. Copy the browser User-Agent from the HAR's replay hints into your client, and resend captured Cookie or Authorization headers if the endpoint is session-gated.

No. The skill captures and replays traffic but does not bypass auth, solve CAPTCHAs, or defeat bot detection. If a site requires a logged-in session, you carry its captured headers and cookies forward rather than forging them.

Server-rendered pages have no XHR to derive because the data arrives in the HTML. Either scrape the HTML directly or find an interaction on the page that does trigger a JSON fetch, then re-capture.