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Best prediction-market APIs, ranked

Seven real cross-venue prediction-market APIs, not a padded top-10. Each entry links its own site so you can verify the facts yourself. dino.markets is #1 because we built this page, but every number here is sourced and dated, including the rivals' real strengths.

The ranked list

01

dino.marketsThis is us

$0 · $60/mo · $200/mo

Sports only, matched across Kalshi and Polymarket with a published confidence score per game.

  • Entity-confidence and resolution-confidence scoring, plus an explicit settlement-risk flag, on every matched game
  • Native MCP server on every plan, including Free (PolyRouter also ships one; we're not claiming to be the only one)
  • Free tier with real API access: 60 req/min, no card required, no monthly credit cap
  • A page per fixture, not just a dashboard row: side-by-side pricing and a cross-venue history chart
  • Sports only: no politics, crypto, or culture markets. If you need those categories too, Oddpool or Prediction Hunt cover more ground than we do
dino.markets
02

Prediction Hunt

Free tier available

Emerged in 2026 to fill the gap Polymarket's Dome acquisition left, covering multiple platforms including Kalshi and Polymarket.

  • Free tier available with no credit card required
  • No Web3 wallet authentication needed to read the data
  • Broader platform coverage than a two-venue matcher, at the cost of per-venue depth
www.predictionhunt.com
03

PolyRouter

Free tier, 10 req/min

Unified REST API across seven platforms: Polymarket, Kalshi, Manifold, Limitless, ProphetX, Novig, and SX.bet.

  • Free tier at 10 req/min, still in open beta as of 2026-07-09
  • Ships an MCP server integration for AI-assistant workflows, per its own site
  • Broadest venue count of any aggregator in this list
www.polyrouter.io
04

Oddpool

$0 · $30/mo · $100/mo

Broad multi-category aggregator: politics, sports, crypto, economics, and culture, with whale tracking and an arb scanner built in.

  • 700K+ markets across Kalshi and Polymarket
  • Whale-trade flagging ($500+ trades) that none of the sports-specialist tools in this list offer
  • No MCP server found in its published docs as of 2026-07-09
Full comparison →www.oddpool.com
05

PMXT

Open-source; hosted API available

Open-source SDK for trading across Polymarket, Kalshi, and more, with a hosted API or a self-hosted option.

  • The only tool on this list that supports real order execution across venues: limit orders, balance checks, open-order management
  • Open-source and self-hostable for full control over your own infrastructure
  • Launched January 2026; younger and less battle-tested than the rest of this list
www.pmxt.dev
06

Tatum

Not independently confirmed

One API key, one base URL, unified interface to Polymarket and Kalshi across 38 endpoints.

  • Built by an established crypto-infrastructure provider, not a prediction-market-only startup
  • 38 endpoints covering market data, order books, and wallet analytics
  • Prediction-market-specific pricing isn't broken out on Tatum's public pricing page as of 2026-07-09
tatum.io/blog/prediction-market-api
07

FinFeedAPI

Enterprise/custom pricing

Normalized market data across Polymarket, Kalshi, Myriad, and Manifold, built by the team behind CoinAPI.

  • Order-book snapshots, trades/quotes, and OHLCV history in one consistent format
  • Backed by production-grade infrastructure shared with CoinAPI
  • Enterprise/custom pricing; no public rate card as of 2026-07-09
www.finfeedapi.com

Further reading

Real sources, not synthesized quotes. Linked honestly, including where they're a third party's own writeup of community sentiment rather than a raw thread.

FAQ

Why is dino.markets ranked first on its own listicle?+
Because we built the page, the same way every company's own "best tools" post ranks itself first. What keeps this honest: every fact here is sourced and dated, every rival's real strengths are stated plainly (see the individual /comparison/* pages for the fuller, more critical version of each), and nothing is fabricated. Judge the ranking on the facts stated, not the position on the page.
What happened to Dome?+
Polymarket acquired Dome, a unified prediction-market API, in February 2026. Dome's own API reached end of life on 2026-04-28. If you were relying on it, Prediction Hunt and PolyRouter both emerged afterward to cover similar ground.
Are any of these tools mentioned on Reddit or Stack Overflow?+
We searched both directly for this specific niche and found very little indexed discussion. It's a young, narrow developer category. The one solid source we found is linked in Further Reading below: a third party's own writeup of Reddit sentiment on sports-odds APIs, not a raw thread. We're not going to invent quotes or threads that don't exist to pad this out.
Which of these actually let you execute trades?+
PMXT supports real order placement across venues. The rest, including dino.markets, are read-only data layers: you still hold your own account or wallet on Kalshi/Polymarket/etc. and place trades there yourself.

Still deciding?

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