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Random freezes, missing sound and display glitches usually trace back to one bad driver. Find and replace yours safely.Free scan · under a minutePolymarket’s three APIs serve different stages of a market workflow: Gamma discovers events and markets, CLOB provides live market data and trading operations, and the Data API exposes account and market activity. They work together rather than replace one another: discover a market, identify its outcome token, read or trade that outcome through CLOB, then use activity data to review what happened.
What each Polymarket API does
| API | Primary job | Use it when |
|---|---|---|
| Gamma API | Event and market discovery and descriptive metadata | You need to find a market and understand what it represents. |
| CLOB API | Live market state, order placement, and order management | You need to inspect market liquidity or perform trading operations. |
| Data API | Account and market activity | You need activity-oriented or account-related data. |
Polymarket’s API overview also lists separate Relayer, WebSocket, and Bridge APIs for transaction submission, real-time streams, and supported funding or withdrawal operations. Those are distinct services, not alternate names for Gamma, CLOB, or Data.
How event, market, outcome, and token IDs fit together
An event groups one or more markets. A market represents a tradable question, with YES and NO outcomes; each outcome has its own token ID. That token ID identifies the specific outcome when you request its price or order book.
- Use Gamma to discover an event and its markets.
- Select the market that matches the question you want.
- Choose an outcome and retain its token ID.
- Use CLOB endpoints to retrieve the relevant price or order-book data, or to carry out a trading operation.
- Use the Data API when you need to inspect account or market activity.
Polymarket’s market-data guide describes this identifier relationship, and its first-order guide shows a market being fetched and an outcome token selected before an order is submitted.
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What the documented order workflow shows
The first-order guide demonstrates a signer-and-wallet-based workflow using current Polymarket client libraries, with examples in TypeScript and Python. At a high level, the sequence is to authenticate with a signer and wallet address, fetch a market, select an outcome token ID, submit a market order, wait for settlement, and check the resulting position. The examples illustrate the documented flow; they should not be treated as a guarantee that every endpoint has the same authentication requirements.
Matching is not the same as settlement
According to the guide, a market order attempts to fill against available liquidity; any unfilled amount is canceled rather than left resting as an open order. A matched trade then settles on-chain asynchronously. Order matching and settlement are therefore separate stages, and the guide’s workflow checks the resulting position after settlement.
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Authentication depends on the operation
The order guide documents signer-based authentication for its trading flow. It does not establish that all reads across Gamma, CLOB, and Data require wallet authentication. Check the documentation for the particular endpoint and operation you plan to use instead of assuming one authentication rule applies to every API.
Choosing an API for your task
- Finding and describing a market: Start with Gamma.
- Reading live market state or placing and managing orders: Use CLOB.
- Reviewing account or market activity: Use the Data API.
- Following one outcome: Carry its token ID from discovery into the relevant CLOB price or order-book request.
- Building a trading flow: Keep market-data reads, order submission, and later settlement checks as distinct steps.
These roles are complementary. A workflow may need more than one API because discovering a market, acting on it, and reviewing activity are different jobs.
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Prefer Data API v2 for new work
The current overview says Data API v2 is available and supports cursor pagination with a shared response envelope. The API reference index labels Data API v1 as legacy. For a new implementation, use the v2 documentation and migration guidance; the reviewed documentation does not establish a migration deadline or compatibility guarantee for v1.
Use endpoint references for request details
The API reference organizes routes for event and market discovery, order books and prices, order management, trades, profiles, positions, user activity, and other functions. Its index is a map of available route groups, not a substitute for the exact endpoint’s parameters, response schema, and authentication instructions.
Check limits and location rules before trading
Polymarket’s overview directs developers to check rate limits for the relevant service and endpoint, and to verify geographic restrictions for order placement. The overview does not provide numeric limits or a jurisdiction list, so consult the current dedicated documentation rather than relying on an assumed rate or availability rule.
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