dino.marketsvsPolymarket
dino.markets vs Polymarket
Polymarket is a venue too: a wallet-native, on-chain order book on Polygon. We match its markets against Kalshi's and surface the arbitrage between the two, over one clean API.
Where Polymarket wins
It's the actual exchange, and it's wallet-native, not account-native.
- Direct order execution, on-chain. Polymarket settles trades on Polygon through its CLOB smart contracts. We're read-only. You still hold your own wallet and trade on Polymarket's own book.
- No KYC on the international platform. Outside US-restricted users, Polymarket authenticates by wallet signature only, no identity verification. Polymarket US, its separate CFTC-regulated arm, does require full KYC.
- Maker rebates. Makers pay no trading fee and receive a share of the fee pool; only takers pay the dynamic fee. dino.markets doesn't execute orders, so none of this touches us.
- Free CLOB REST + WebSocket API. Polymarket's own market-data and order APIs are free to query. The cost is entirely in trading fees, not API access.
Where dino.markets wins
Polymarket only shows you Polymarket. We show you Polymarket vs Kalshi.
- Cross-venue matching. The same fixture lists on Polymarket and Kalshi under different market IDs and outcome names. We match them continuously with an explicit confidence band. Polymarket's API has no visibility into Kalshi's book.
- Live arbitrage, computed. Gross ask-to-ask edge between the two venues, per-outcome depth, settlement-risk disclosure. Polymarket's own API can't produce any of it; it only sees its own order book.
- One Bearer key, not EIP-712 order signing. Placing an order on Polymarket means signing it yourself with EIP-712 over the CTF Exchange domain, on top of a two-layer wallet-signature-then-HMAC handshake just to authenticate. We're a single Bearer API key. Nothing to sign, no wallet required to read the data.
- No geo-block to route around. Polymarket's main platform blocks the US, UK, and a long list of other jurisdictions outright, with more restricted to close-only. Reading our feed carries no trading-jurisdiction restriction at all.
Head-to-head, line by line
Polymarket is a venue we match against, not a rival data API. This compares what each surface is actually for.
| Feature | dino.markets | Polymarket |
|---|---|---|
| What it is | ||
| Type of product | Cross-venue data API + MCP | On-chain prediction-market exchange |
| Can you place trades | Direct, on-chain execution | |
| Regulatory status | Not a broker/exchange | Geo-blocked in US/UK/EU+ · Polymarket US separate, CFTC-regulated |
| Market coverage | ||
| Venues covered | Kalshi + Polymarket, matched | Polymarket only |
| Cross-venue arbitrage detection | ||
| Access | ||
| KYC required | No (intl) · Yes (Polymarket US) | |
| Wallet required | ||
| Geo-restricted | Yes, blocked in US / UK / France / Germany / Italy / Netherlands / Belgium + more | |
| Data access | ||
| REST API | ||
| WebSocket streaming | Basic/Pro | |
| Auth model | Bearer API key | Wallet EIP-712 + HMAC + per-order signing |
| Costs | ||
| API access cost | $0 (Free tier) | $0, API itself is free |
| Per-trade cost | N/A (we don't execute trades) | Taker up to ~3.15% · makers rebated |
| Developer experience | ||
| MCP server | All plans | |
| Unified schema across venues | N/A (single venue) | |
Source: docs.polymarket.com/developers/CLOB/introduction + docs.polymarket.com/api-reference/geoblock + dino.markets pricing. Verified 2026-07-09.
Who should pick which
If you only trade on Polymarket, go straight to Polymarket. If you want to see it against Kalshi, or catch the gap between them, that's what we're for.
Pick Polymarket directly if…
You want on-chain, wallet-native execution on one venue.
You're comfortable holding a funded wallet on Polygon, want maker rebates, and don't need visibility into how Kalshi is pricing the same game.
→ polymarket.com · Free API, taker fee up to ~3.15%.
Pick dino.markets if…
You want to see Polymarket against Kalshi, not just Polymarket alone.
You're building a bot, dashboard, or agent that needs both venues at once: the matched feed, confidence-scored arb, and a real-time WebSocket push, over one Bearer-key API and MCP server. No wallet or order signing needed to read the data.
→ Free tier, MCP included · $60/mo for the real-time stream.
FAQ
Is dino.markets a replacement for Polymarket?+−
No. Polymarket is the exchange. You still hold your own wallet and capital there and sign your own trades. We're a data layer that matches Polymarket's markets against Kalshi's and computes the arbitrage between them. We never touch your wallet.
Does dino.markets use Polymarket's API?+−
Yes. We integrate Polymarket's CLOB REST and WebSocket API directly, alongside Kalshi's API, and normalize both into one matched schema.
Do I need a wallet to use dino.markets?+−
No. Reading the matched feed, the arbitrage data, or connecting the MCP server only needs a dino.markets API key. A wallet is only needed if and when you go place a trade on Polymarket itself.
Is Polymarket available in the US?+−
The original international platform blocks the US along with the UK, France, Germany, Italy, the Netherlands, Belgium, and others. A separate CFTC-regulated platform, Polymarket US, launched in 2026 for US users, with full KYC required; state-level availability within the US varies and isn't confirmed in Polymarket's own docs as of 2026-07-09, so check current eligibility directly with them before building around it.
What does Polymarket charge to trade?+−
Its CLOB REST and WebSocket API are free to query. Trading itself carries a dynamic taker fee, up to roughly 3.15% on contracts priced near 50 cents. Makers pay no fee and receive a share of the fee pool.
Still deciding?
Start on Free. The matched feed costs nothing, and you get MCP from day one.
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