market intelligence APIs · public beta

Every market signal.
One clean API.

Sell-ready stock intelligence from Reddit, X/FinTwit, AlphaAI financial news, and Polymarket probabilities. SEC filings and insider transactions are coming soon.

Start seven-day trial  →Try live JSON

5,706 U.S. equities · one API key · JSON over HTTPS · CORS enabled

GET https://api.marketrelay.dev/v1/trending?days=1&limit=1200 OK
{
  "source": "x",
  "count_type": "lower_bound",
  "data": [{
    "ticker": "IBM",
    "attention_score": 98.4,
    "mentions": 1444,
    "unique_authors": 1115,
    "chatter_tone": "mixed"
  }]
}
37,166cashtag posts scanned
24,239equity posts matched
1,357active ticker signals
5,313unique market voices
what MarketRelay sells

Four core APIs. Two coming soon.

Use each source independently or combine the four live products into one ticker signal.

See every endpoint  →
01 / REDDIT SENTIMENT API · SETUP REQUIRED

Measure retail conviction

Rank stocks by Reddit mentions, author breadth, engagement, velocity, and bullish/bearish language across 1D, 3D, 7D, and 30D windows.

02 / X ATTENTION API · LIVE

Know what FinTwit is watching

Rank stocks by cashtag activity, unique-author breadth, velocity, engagement, concentration, and chatter tone across the same windows.

03 / NEWS SENTIMENT API · SETUP REQUIRED

Track the headline cycle

Rank companies by relevance-scored publisher coverage, source breadth, category, velocity, and ticker-level sentiment from AlphaAI.

04 / POLYMARKET API · PUBLIC FEED

Price real-money expectations

Connect stock tickers to active prediction markets, implied probabilities, liquidity, volume, and changing conviction.

05 / SEC FILINGS API · COMING SOON

Query company filings

Retrieve normalized SEC filings by ticker, form type, filing date, and accession number without maintaining a parsing pipeline.

06 / INSIDER TRANSACTIONS API · COMING SOON

Follow insider activity

Track normalized Form 4 purchases, sales, ownership changes, transaction values, and filing dates by ticker.

stable v1 contract

Endpoints for real products.

Build scanners, alerts, watchlists, research agents, and market dashboards.

GET / TRENDING

Rank market attention

See which stocks are drawing broad, accelerating discussion—not just the loudest repeated posts.

GET / TICKERS / {TICKER} / EXPLAIN

Explain a move

Return a concise explanation, themes, drivers, and counter-signals for an active ticker.

GET / TICKERS / {TICKER} / SIGNALS

Join attention with events

Combine social attention, filings, insider activity, and disclosures in one ticker response.

live output preview

The feed right now.

Counts are transparent lower bounds while sampled coverage accumulates.

Open JSON  →
RankStockActivityVelocityToneScore
1$IBMInternational Business Machines Corporation1,444 posts1,115 unique authors+5454%mixed98.4trend score2$PLTRPalantir Technologies Inc.2,695 posts327 unique authors+218%bullish97.9trend score3$SEERSeer, Inc.136 posts68 unique authors+312%neutral97.2trend score4$AEHRAehr Test Systems103 posts59 unique authors+758%bullish95.8trend score5$CLSKCleanSpark, Inc.151 posts90 unique authors+403%bullish95.6trend score6$NXTCNextCure, Inc.945 posts83 unique authors+94400%bullish95.6trend score7$GSGoldman Sachs Group, Inc. (The)128 posts112 unique authors+611%bullish95.5trend score8$NBISNebius Group N.V.190 posts161 unique authors+197%bullish95.4trend score9$JPMJP Morgan Chase & Co.178 posts144 unique authors+314%bullish95.3trend score10$LCIDLucid Group, Inc.417 posts312 unique authors+184%mixed94.7trend score
source health

Clear about what is live.

X is live. Reddit, AlphaAI news, and Polymarket switch to live after their first successful production sync. SEC filings and insider transactions are coming soon.

Source status JSON  →
Social responses contain transformed aggregates, news excludes article bodies, and Polymarket responses expose public market probabilities without wallet or trading data.

Build against live data
for seven days.

Create one key for every production API. The trial stops automatically, with no charge or surprise renewal.

Create API key  →Discuss production access