Jobs2Careers vs Upwork

Jobs2Careers (J2C) is a cost-per-click job-ad aggregator: its search.php endpoint returns matching listings from thousands of employer feeds for publishers to display and earn a click-through share on. A live probe confirmed the gateway now serves over HTTPS and still requires the documented API-key parameters.

Upwork's public API is now a single GraphQL endpoint covering the freelance marketplace it once exposed as separate REST resources — job postings, proposals, contracts, time tracking, and messaging — authenticated via OAuth 2.0 (Authorization Code Grant with PKCE). A live probe confirmed the stored docs URL still redirects to the current GraphQL reference and that the gateway itself returns a genuine 401 challenge to unauthenticated calls, with no Access-Control-Allow-Origin header on either that request or a follow-up preflight. Registering an application is free, gated only by Upwork's own review and a 300-request-per-minute-per-IP rate limit.