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Computes effective fee rates over the last 7 days from actual fills, and explains the cryptic fee_token values you’ll see in trade responses.

Endpoint

Why use this

Hyperliquid records fee_token as USDH, +0, +1, etc. These look opaque. This endpoint resolves them: which side they apply to, what they mean, and what rates are actually being charged today.

Response

Notes

  • HIP-4’s deployer fee mechanic exists in protocol but is currently 0 bps for all observed fills.
  • +N notation in HIP-4 refers to the spot token at index N. For HIP-4 fills, +0/+1 map to the outcome’s Yes/No shares received in a buy.