Real-time financial news — ticker-tagged, sentiment-scored, categorized, over WebSocket and REST.
H1 News API is HeliusOne's own news engine. It aggregates 65+ sources — market news, press-release wires, central banks, trading halts, SEC filings, global events, and Latin American markets — normalizes them into one schema, tags tickers, scores sentiment, and fans them out live. It's the same feed that powers the HeliusOne terminal.
5-day free trial on every plan · cancel anytime
One consistent feed — live and historical
A true push feed — subscribe to the tickers, categories, and sentiment you care about and receive normalized articles the millisecond they are ingested. No polling, no refresh loops, no rate-limit roulette.
Every story is classified — markets, earnings, macro, world, commodities, forex, crypto, trading halts, SEC filings. Dedicated endpoints for earnings, halts, and central-bank news, plus category filters everywhere.
Nasdaq trading halts with reason codes (~20s latency) — the purest "something is happening to this ticker" signal — plus 8-K, Form 4, S-1, SC 13D, and 10-Q filings surfaced as structured news.
Each story is scored positive, neutral, or negative at ingest with a numeric value attached. Filter the stream to just the negative headlines on a name, or track sentiment shifts over time.
Articles carry an ISO language code (detected for mixed-language feeds) and a source region — us, uk, eu, jp, br, mx, latam, global. Keep your feed English-only, or slice by the market that moves your book — Brazil and Mexico included.
The same filters as the stream — ticker, category, sentiment, language, region, source, full-text search with AND/OR — over the full stored history, with CSV export and gapless since_id backfill for reconnects.
Stream live over WebSocket, query history over REST — every endpoint takes the same filters
Live feed. Filter by tickers, categories, sentiment, sources, types, languages, regions — server-side.
Query history with every filter the stream supports, plus full-text search, date presets, and CSV export.
Earnings news: results wires, earnings coverage, and query feeds. Calendar companion below.
Nasdaq trading halts & resumptions with reason codes, tagged to the exact symbol.
Central-bank & economy news — Fed, ECB, BoE, BoJ, CFTC — filterable by source.
SEC filings as structured news — filter by form: 8-K, Form 4, S-1, SC 13D, 10-Q.
Daily sentiment breakdown for one ticker or the whole market over any preset window.
Most-mentioned tickers across the feed — a live attention ranking for any window.
Upcoming earnings dates up to 60 days out, filterable to a symbol.
Analyst buy/hold/sell recommendation trends for any ticker.
End-of-day market recap generated with your own AI key, cached daily for every caller.
Your plan, monthly quota, and usage — never counted against your quota.
Plus /v1/news/general, /v1/news/category/{category}, /v1/categories, /v1/tickers, and /v1/sources.
Interactive reference for every endpoint and filter: api.heliusone.com/docs ↗
The stream is a Pro-plan feature. One connection costs one API call — every pushed article is free.
Connect with your key, filtering server-side via query params — tickers, categories, sources / exclude_sources, types, languages, regions:
Change filters live — send a frame; only the keys you send are touched:
Real requests against the live API — pick a preset or compose your own filters, then copy it as curl
Live requests hit the production API with a shared, rate-limited demo key — responses are real and current. The demo runs Basic-plan rules: one ticker per call, last 30 days.
Normalized into one schema, de-duplicated, and enriched
Yahoo Finance, MarketWatch real-time headlines, Nasdaq, CNBC, Seeking Alpha, WSJ & FT Markets, NYT Business, The Economist, Business Insider, TheStreet, Fortune, Forbes — plus PR Newswire and GlobeNewswire, including an earnings-only wire slice, and Reuters headlines via wire partners.
Federal Reserve, ECB, Bank of England, Bank of Japan, and CFTC press releases on a ~20-second low-latency tier, plus SEC EDGAR material-event filings.
BBC World, Al Jazeera, Guardian, NPR, Nikkei Asia, and the GDELT global event monitor for geopolitics; commodities, energy, forex, and crypto coverage from OilPrice, Investing.com, CoinDesk, and Cointelegraph.
InfoMoney, G1 Economia, Exame, Money Times, and Brazil Journal for Brazil; El Financiero and Expansión for Mexico; Bloomberg Línea and MercoPress region-wide — plus English-language coverage from Rio Times, Agência Brasil, and Mexico News Daily. Filter with region=br, mx, or latam.
Every plan starts with a 5-day free trial (100 calls, all features of your chosen plan). Your API key is provisioned the moment checkout completes. One call = one request, no matter how much it returns.
For prototyping, research tools, and small apps
Card required · 5-day / 100-call free trial · cancel anytime
For production apps and trading tools
Card required · 5-day / 100-call free trial · cancel anytime
Need custom volume, rate limits, SLAs, or dedicated sources? Talk to us.
Your API key, live usage, and billing live in your API account.
Open My API AccountQuestions or custom-volume inquiries: support@heliusone.com