API V2

The following methods are used to enhance the capabilities of your service using Cryptomonitor’s exchange features.

Algorithm

Cryptomonitor uses a dynamic rate system based on liquidity provider market depth analysis. The markup parameter allows you to adjust the final exchange rate.

The markup parameter influences the rate pre-calculation as follows:

A_final = A_calculated × (1 − K_markup / 100)

Afinal	Final amount to receive (predicted)
Acalculated	Initial amount calculated by the system
Kmarkup	Your markup value (in percent)

API v1 — Public Rate Endpoint

The rates data can be obtained through a public API v1 call (no authorization required).

Endpoint: https://cryptomonitor.info/api/v1/rates/public/one

Parameter	Description	Example
instrumentFromCurrencyTitle	Currency to send	BTC
instrumentFromNetworkTitle	Network of the sent currency	BTC
instrumentToCurrencyTitle	Currency to receive	USDT
instrumentToNetworkTitle	Network of the received currency	TRC20
rateMode	FLOATING or FIXED	FLOATING
claimedDepositAmount	Amount the user intends to send	1
markup	Your markup percentage	0.3

Example Request

GET https://cryptomonitor.info/api/v1/rates/public/one?instrumentFromCurrencyTitle=BTC&instrumentFromNetworkTitle=BTC&instrumentToCurrencyTitle=USDT&instrumentToNetworkTitle=TRC20&rateMode=FLOATING&claimedDepositAmount=1&markup=0.3

Markup Parameter in Order Creation

To apply your commission correctly, pass the markup parameter when creating an order.

{
  "rateMode": "FLOATING",
  "instrumentFrom": {
    "currencyTitle": "USDT",
    "networkTitle": "TRC20"
  },
  "instrumentTo": {
    "currencyTitle": "BTC",
    "networkTitle": "BTC"
  },
  "destinationAddress": "bc1qxy2kgdygjrsqtzq2n0yrf2493p83kkfjhx0wlh",
  "claimedDepositAmount": "125000",
  "markup": "0.2"
}

API v2 — Advanced Secure Integration

API v2 requires authorization using API keys and HMAC SHA256 signing. It is designed for professional and high-volume integrations.

Creating an API Key

POST https://cryptomonitor.info/api/v1/users/generate-api-key

Note: The secretKey is shown only once. Save it immediately.

Using API v2

Every request must include the following headers:

• x-api-public-key
• x-api-timestamp (UNIX timestamp)
• x-api-signature (HMAC SHA256)

Our technical team is ready to help you with the full integration.