market intelligence APIs · public beta

Every market signal.
One clean API.

Sell-ready stock intelligence from Reddit, X/FinTwit, financial news, and Polymarket probabilities.

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": "SMCI",
    "attention_score": 97.0,
    "mentions": 1600,
    "unique_authors": 77,
    "chatter_tone": "mixed"
  }]
}
17,549cashtag posts scanned
12,014equity posts matched
873active ticker signals
2,685unique market voices
what MarketRelay sells

Four market-signal APIs.

Use each source independently or combine them into one ticker-level view.

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.

04 / POLYMARKET API · PUBLIC FEED

Price real-money expectations

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

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 / STOCK / {TICKER} / EXPLAIN

Explain a signal

Return themes, drivers, sentiment, and counter-signals for an active ticker.

GET / COMPARE

Compare market conviction

Compare attention, sentiment, breadth, and velocity across as many as ten tickers.

live output preview

The feed right now.

Counts are transparent lower bounds while sampled coverage accumulates.

Open JSON  →
RankStockActivityVelocityToneScore
1$SMCISuper Micro Computer, Inc.1,600 posts77 unique authors+459%mixed97.0trend score2$KIMKimco Realty Corporation (HC)103 posts51 unique authors+3333%neutral92.0trend score3$SEERSeer, Inc.243 posts217 unique authors+138%bullish90.9trend score4$ASTSAST SpaceMobile, Inc.3,117 posts475 unique authors+98%bullish88.3trend score5$AAOIApplied Optoelectronics, Inc.282 posts243 unique authors+68%bullish85.1trend score6$SOFISoFi Technologies, Inc.694 posts91 unique authors+109%bullish79.9trend score7$REGNRegeneron Pharmaceuticals, Inc.40 posts39 unique authors+29%neutral79.9trend score8$GOOGLAlphabet Inc.260 posts94 unique authors+9%bullish79.7trend score9$BIDUBaidu, Inc. - American Depositary Shares, each representing 8133 posts62 unique authors+2%bullish79.2trend score10$UNHUnitedHealth Group Incorporated Common Stock (DE)69 posts61 unique authors+13%neutral78.9trend score
source health

Clear about what is live.

X is live. Reddit, financial news, and Polymarket switch to live after their first successful production sync.

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