Orbscan: Polymarket Explorer & Analytics API

Welcome to Orbscan — the REST API and on-chain explorer for Polymarket prediction markets. Query trader activity, transfers, and transactions in seconds.

Orbscan gives you programmatic access to on-chain Polymarket data through a clean REST API. Look up any wallet’s full trading history, inspect USDC deposits and withdrawals, or decode any transaction hash into a human-readable summary — without parsing raw blockchain data yourself.

Quickstart

Make your first API call in under five minutes.

Authentication

Get your API key and authenticate every request.

API Reference

Full endpoint reference with request and response examples.

Guides

Step-by-step walkthroughs for common use cases.

What You Can Build

Orbscan indexes every wallet, trade, and market on Polymarket and surfaces that data through three focused endpoints:

Trader Activity

Pull every buy, sell, and redeem for any wallet — paginated, filterable, newest-first.

Deposits & Withdrawals

Inspect the complete USDC transfer history for any Polymarket wallet.

Transaction Decoder

Turn any transaction hash into a plain-English summary and individual fills.

Get Started in Three Steps

1. Create an account

   Sign up at orbscan.com and verify your email to activate your free account.

2. Generate an API key

   Go to Settings → API Keys, click Generate New Key, and copy your key immediately — it is shown only once.

3. Make your first request

   Pass your key as a Bearer token and call any endpoint. See the Quickstart for a complete walkthrough.

   curl "https://orbscan.com/open-api/v1/trader/0x6a72f61820b26b1fe4d956e17b6dc2a1ea3033ee/activity?limit=5" \
     -H "Authorization: Bearer YOUR_API_KEY"
   

All Orbscan data reflects on-chain state, typically within seconds of a new trade settling on Polymarket.