Helious
FreemiumLiveLast verified 24 Sept 2026
US Treasury yields, auction results with bid-to-cover/tail, and scored economic-release data.
Example request
curl -s -A 'WildAPIsResearch/0.1 (+https://wildapis.com)' 'https://api.helious.io/v1/auctions?limit=2'
Free tier, in plain English
Works without a key at a shared 30 calls/minute; a free account raises that to 60/min but still withholds live market prices and delays news an hour.
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