Free tools
Detect tech stack
Free, rate-limited detection of the technologies a website runs, from a live fetch of its home page.
GET
https://api.rankparse.com/v1/tools/tech-stackFree (5 per tool per day per IP)TurnstileFetches the domain's home page and detects the technologies it runs, the same detection as the paid Tech stack endpoint. Shared fields (tool, tier, quota), the daily allowance and the shared errors are described in Free tools.
Query parameters
domainstringrequiredDomain to check, for example linear.app.
Response
domainstringThe normalized domain.
techobjectThe detection result, the same object the paid Tech stack endpoint returns in data: domain, technologies (each with name, category and confidence), server, x_powered_by and response_time_ms.
Errors
| HTTP | Code | When |
|---|---|---|
| 400 | invalid_input | A required parameter is missing or invalid. |
| 403 | turnstile_failed | Missing or invalid Turnstile token. |
| 429 | quota_exceeded | Daily allowance for this tool reached. |
| 400 | invalid_domain, invalid_url, private_ip | The domain is malformed or resolves to a private address. |
| 503 | fetch_failed, timeout, response_too_large | The home page could not be fetched. |
Fetch errors are not cached, but they use an allowance slot.