WebSocket data API

Polymarket & Polygonmempool data

Get pending transactions over WebSocket. See trading intent before on-chain confirmation.

Polymarket mempoolDecoded fills: Wallet, buy/sell, price and size.
Polygon mempoolRaw notifications: Raw pending transactions for your own parser.

Connect for free View data format

No paid subscription required

Decoded trades or raw transactions

Polymarket mempool

Decoded, validated pending fills with wallet, market, side, price and size. Skip the decoding and connect the data to your strategy.

Polygon mempool

Stream the original pending transaction notifications received by the service over WebSocket. Keep the raw content for your own decoding and filters.

Mempool transactions are pending and may be replaced, reverted or dropped. The raw feed does not guarantee network-wide coverage; neither feed offers historical replay.

For copy trading, market making and arbitrage research

Copy-trading signals

Watch wallets and evaluate whether to follow.

Market-making inputs

Use order flow and inventory to inform quotes.

Arbitrage research

Check depth and costs to screen opportunities.

Pricing

Learn more →

Three steps to connect

Create an API key

Create a key for your client and store it securely.

Request a ticket

Choose a feed and exchange your key for a single-use ticket.

Connect your client

Use the returned address and ticket to connect over WebSocket.