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Partner Guide

This guide is for partners building retail trading platforms on top of Polymarket US. If you’re building a platform that onboards end-users for trading, this section is for you.
What is a Partner?A partner builds a consumer-facing trading application. Partners manage their own users, handle KYC verification, process deposits and withdrawals, and execute trades on behalf of their customers.

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Before You Start

Onboarding

Generate your API keys, share your public key with Polymarket, and complete the verification process to receive your credentials.

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Partner Types

Polymarket US supports two types of partners:
Partner TypeDescriptionAPIs Used
Direct TradingInstitutional or proprietary traders who trade their own capitalTrading APIs only
Retail PartnerRetail platforms onboarding end-usersTrading APIs + Partner APIs

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User Lifecycle

Partners manage the complete user lifecycle from KYC verification to trading:
Automatic User CreationUsers are created automatically when KYC verification is approved. There is no separate account creation step - the system provisions EP3 trading resources as part of the KYC approval process.

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1. Identity Verification (KYC)

Start by verifying user identity. When approved, the user is automatically provisioned for trading.
  • API: KYC API
  • Key endpoint: POST /v1/kyc/start

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2. Funding

Link bank accounts or cards and process deposits.

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3. Trading

Once funded, users can place orders.
  • API: Trading API
  • Key endpoints:
    • POST /v1/trading/orders - Insert order
    • POST /v1/trading/orders/cancel - Cancel order

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4. Positions & Withdrawals

Track positions and process withdrawals (following FIFO rules).

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Complete Onboarding Flow

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Getting Started

Users API

List and manage users

KYC Verification

Identity verification workflow

Payments

Bank and card payment processing

Referral Codes

Track user acquisition

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Support

For integration questions, contact institutional@qcex.com.