Get fixed rate (deprecated)

POST getFixRate

note

The method is deprecated. Use getFixRateForAmount instead.

HTTP request

https://api.changelly.com/v2/#getFixRate

Request

Request

Header parameters

Name	Type	Required	Description
X-Api-Key	string	true	Your API key (SHA256 from Public Key)
X-Api-Signature	string	true	The query's serialized body signed by your private key according to the RSA-SHA256 method.

Body parameters

Name	Type	Required	Description
jsonrpc	string	true	JSON-RPC version.
id	string	true	Client's custom ID.
method	string	true	API method name.
params	object or array of objects	true	Request parameters.

params object:

Name	Type	Required	Description
from	string	true	Payin currency code (in lowercase).
to	string	true	Payout currency code (in lowercase).

Payload

application/json

{
  "jsonrpc": "2.0",
  "id": "test",
  "method": "getFixRate",
  "params": [
    {
      "from": "eth",
      "to": "btc"
    },
    {
      "from": "eth",
      "to": "ltc"
    }
  ]
}

cURL

curl --location --request POST 'https://api.changelly.com/v2' \
--header 'X-Api-Key: {{apiKey}}' \
--header 'X-Api-Signature: {{sign}}' \
--data-raw '{
  "id": "test",
  "jsonrpc": "2.0",
  "method": "getFixRate",
  "params": [
    {
      "from": "eth",
      "to": "btc"
    },
    {
      "from": "eth",
      "to": "ltc"
    }
  ]
}'

Response

Example

Sample response

application/json

{
  "jsonrpc": "2.0",
  "id": "test",
  "result": [
    {
      "id": "f4dd43106d63b65b88955a0b362645ce960987c7ffb7a8480dd32e799431177f",
      "result": "0.02556948",
      "networkFee": "0.000175",
      "from": "eth",
      "to": "btc",
      "max": "50.000000000000000000",
      "maxFrom": "50.000000000000000000",
      "maxTo": "1.27847400",
      "min": "0.148414210000000000",
      "minFrom": "0.148414210000000000",
      "minTo": "0.00379488",
      "expiredAt": 1664890979
    },
    {
      "id": "f4dd43107876ad5b88955a0b362645ce960a87c0fdb7ab540ed635799230107e830d3f",
      "result": "22.1818471906",
      "networkFee": "0.00153797",
      "from": "eth",
      "to": "ltc",
      "max": "58.60648073",
      "maxFrom": "58.60648073",
      "maxTo": "1299.99999994",
      "min": "0.09280000",
      "minFrom": "0.09280000",
      "minTo": "2.05847542",
      "expiredAt": 1664890978
    }
  ]
}

Success

Response params

Name	Type	Description
jsonrpc	string	JSON-RPC version.
id	string	Client's custom ID.
result	array of objects	Result.

result schema:

Name	Type	Description
id	string	Rate ID that can be used during 1 minute. This time should be enough for user to initiate the exchange. Expired rate id cannot be used for creation of the fixed rate transaction. id has to be stored somewhere. It will be used as rateId value while calling.
result	string	Exchange rate before withholding the network fee. Important. To calculate the exact amount that the user will get, you need to multiply the amount that the user wants to send to the result and deduct the value of the networkFee.
from	string	Payin currency code.
to	string	Payout currency code.
networkFee	string	Commission taken by the network from the amount sent to the user. For one-step exchange, displayed in pay-out currency. For two-step exchanges, displayed in BTC or in USDT.
max	string	Maximum exchangeable amount.
maxFrom	string	Maximum payin amount for which we would be able to perform the exchange.
maxTo	string	Maximum payout amount for which we would be able to perform the exchange.
min	string	Minimum exchangeable amount.
minFrom	string	Minimum payin amount for which we would be able to perform the exchange.
minTo	string	Minimum payout amount for which we would be able to perform the exchange.
expiredAt	integer	Unix timestamp in seconds (10 digits) representing the expiration time of the fixed rate.

Errors

Error schema

Name	Type	Description
jsonrpc	string	JSON-RPC version.
id	string	Client's custom ID.
error	object	Possible errors.
»code	integer	Error code.
»message	string	Error message.

Error codes

Code	Message	Description
-32600	Invalid amount: maximal amount is {max_amount}	The attempt to exchange more currency than a maximal amount.
-32602	Invalid currency: {currency} temporary disabled	This currency is currently disabled.
-32602	Invalid currency: {currency} temporary disabled for fix rate transactions	This currency is currently disabled for fix-rate transactions.
-32602	Invalid currency: {currency} is temporary disabled on API as output currency	This currency is currently disabled on API as an output currency.
-32602	Invalid currency: {currency} is temporary disabled on API as input currency	This currency is currently disabled on API as an input currency.
-32602	Invalid currency: {currency} not found	This currency is not listed on Changelly or the ticker is invalid.
-32602	Parameter {param} is invalid	You've specified an invalid parameter.
-32603	Internal Error or Error	Most likely, the problem is on our side. Further investigation is required.