The prediction-market data layer for Polymarket

Uniblock gives you direct Polymarket APIs for markets, prices, positions, and trades through one key and one API key, so you can ship Polymarket features without building the data layer yourself.

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Top Market

Illustrative preview · not live

Will BTC close above $100,000 in 2026?

Yes

63%

No

37%

$4.2M 24h volume

12,431 traders

99.9%

Routed uptime

9+

Providers routed

GET

/direct/v1/Polymarket/gamma/markets/slug/{slug}

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{

“id”: “512724”,

“slug”: “btc-above-100k-2026”,

“question”: “Will BTC close above $100,000 in 2026?”,

“outcomes”: [“Yes”, “No”],

“outcomePrices”: [“0.63”, “0.37”],

“bestBid”: 0.62,

“bestAsk”: 0.64,

“lastTradePrice”: 0.63,

“volume24hr”: “4218904.52”,

“liquidity”: “812445.10”,

“active”: true,

“closed”: false,

“endDate”: “2026-12-31T00:00:00Z”

}

One call. Everything below.

Markets & prices

Gamma markets, CLOB prices, midpoints, and spreads.

Positions & balances

User positions, holdings, and portfolio value.

Trades & activity

Fills, leaderboards, and resolved outcomes per market.

Routing & uptime

Automatically routed across providers for 99.9% uptime.

WHAT IS POLYMARKET

WHAT IS POLYMARKET

The world’s largest prediction market

Polymarket is an on-chain prediction market where users trade shares on the outcome of real-world events, elections, sports, economics, and culture. Markets are denominated in USDC and settle on Polygon, so every order, position, and resolution lives on-chain and is queryable in real time.

WHAT YOU CAN BUILD

WHAT YOU CAN BUILD

APIs that power Polymarket products

Everything you need for analytics dashboards, trading bots, portfolio trackers, and notification systems on top of Polymarket, without running Polygon infrastructure yourself.

Market & price data

Live USDC prices, order-book state, and resolved outcomes via the Market Data and Unified JSON-RPC APIs to power odds widgets and dashboards.

Positions & balances

Read any wallet’s USDC balance and outcome-token holdings with the Token API for portfolio trackers and live PnL views.

Trade & settlement history

Query transfers, fills, and settlement events with the Transaction and Scan APIs to reconstruct full trade history and market resolution.

Real-time webhooks

Subscribe to on-chain events with the Webhook API so your app reacts the instant a market moves or resolves, no polling required.

PREVIEW

The call looks like this

One key, one request. The placeholder key below is swapped for your own once access is granted.

curl https://api.uniblock.dev/v1/rpc/polygon -H "Authorization: Bearer YOUR_API_KEY" -d '{"method":"eth_blockNumber","params":[],"id":1}'

COMPARISON

Uniblock vs. building it yourself

The same Polymarket workload, two ways to build it.

Uniblock

Build it yourself

Simplicity

One key, one endpoint, typed responses.

One key, one endpoint, typed responses.

Source APIs, SDKs, and glue code to wire up and maintain.

Cost

One plan, usage-based, no per-source minimums.

One plan, usage-based, no per-source minimums.

Separate accounts, minimums, and upkeep per source.

Latency

A managed endpoint tuned for these reads.

A managed endpoint tuned for these reads.

You tune and scale the infrastructure yourself.

Correctness

Normalized, typed responses you can trust.

Normalized, typed responses you can trust.

You own normalization, edge cases, and drift.

WHAT'S COVERED

WHAT'S COVERED

What the Polymarket API covers

One direct API and one key, here’s the Polymarket data surface you get.

Market Data API

Live prices & order-book state

Token API

USDC & outcome-token balances

Transaction API

Fills, transfers & settlements

Scan API

On-chain activity & logs

Webhook API

Real-time event triggers

Unified JSON-RPC

Raw Polygon reads, one endpoint

Leaderboards

Trader rankings & volume

Resolved outcomes

Settled markets & payouts

Market metadata

Symbols, contracts & details