For "EU Portal API" this is just a reference link shown on the Sources page (e.g. the portal's calls-for-proposals page) — the actual fetching uses the portal's own public API, not this URL.
RSS gives far more reliable candidate discovery than scraping a page's links — no nav/footer noise, and it doesn't matter whether the site's listing is JS-rendered. Use it if the source offers a feed (many WordPress sites have one at /feed/; check the site for an RSS icon/link too). EU Funding & Tenders Portal API calls that portal's own official public REST API directly (documented at its /screen/support/apis page) — use this specifically for ec.europa.eu/info/funding-tenders, since its pages don't render results under headless automation at all; only open/forthcoming calls are returned, closed ones are excluded by the query itself.
/feed/
/screen/support/apis
The portal currently lists roughly 750 open/forthcoming calls. Results are fetched soonest-deadline-first, so a lower cap trades off the calls with the most distant deadlines first — the near-term ones are always fetched before them.
Each candidate costs at least one AI extraction call, which is what makes a run slow — lower this for a faster run, or raise it (up to "Results to fetch per discovery pass" above, for eu_portal sources) to clear everything not-yet-seen in one go. A run saves its progress as it goes, so a large batch is safe to leave running or interrupt — nothing above the cap, or lost to an interruption, is gone for good: it's picked up on the next "Check now" (already-known calls are always skipped).