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PAXG Swaps

The PAXG Swap API enables buying and selling of PAXG (Pax Gold) tokens on Ethereum mainnet. The API returns ready-to-execute transaction calldata for swaps via DEX aggregators, handling liquidity sourcing and routing automatically.
Currently only available via REST API.

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Supported Networks

NetworkChain ID
Ethereum mainnet1

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Supported Tokens

The following tokens can be used as the offer or want asset:
TokenAddress (Ethereum)
PAXG0x45804880De22913dAFE09f4980848ECE6EcbAf78
USDC0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48
USDT0xdAC17F958D2ee523a2206206994597C13D831ec7
PYUSD0x6c3ea9036406852006290770BEdFcAbA0e23A0e8
USDG0x2a54bA2964C8Cd459Dc568853F79813a60761B58

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How It Works

  1. Request a quote — Call the swap quote endpoint with the offer asset, want asset, amount, and user address
  2. Review the quote — The response includes the expected output amount, transaction calldata, and any required token approvals
  3. Execute the swap — Submit the transaction using the provided calldata

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Authorization Methods

The API supports two authorization methods for token approvals:
  • allowance_holder (default) — Standard ERC-20 approve flow using the AllowanceHolder contract
  • permit2 — Gasless approval using EIP-712 signed permits
For most use cases, the default allowance_holder method is recommended as it’s simpler to implement.