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Overview

LINK lets you add a custom markup on top of the base exchange rate for your users. The markup is a percentage deducted from the customer’s payout — it never inflates the headline rate shown to LINK. Markups are configured from your LINK Dashboard under Settings → API Markups.

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Markup Types

There are two independent markup fields, each covering a different product:
TypeApplies ToMax
Retail MarkupRetail on-ramp and off-ramp transactions2%
B2B MarkupOTC / Business API transactions2%
Both fields default to 0. You can set them independently — enabling a B2B markup does not affect retail transactions and vice versa.

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How It Works

When a markup is set, LINK applies it on top of its own exchange rate before the customer sees the final payout:
  1. LINK computes the base rate for the transaction.
  2. Your markup percentage is applied on top — reducing the customer’s payout by that proportion.
  3. The final rate and payout are returned to your system and shown to the customer.
The fee is tracked at the transaction level (linkFee for LINK’s share, customerFee for your markup share).

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Configuring Your Markup

  1. Log in to your LINK Dashboard.
  2. Navigate to Settings → API Markups.
  3. Enter a Retail and/or B2B markup value between 0 and 2 (percent).
  4. Click Save Changes.
Changes take effect on the next transaction — no redeployment or API key rotation required.
Currency Limits FAQ