Prepare a native KAS transfer on Kaspa (mainnet). Selects spendable UTXOs covering the amount plus a mass-based fee and returns the unsigned transaction - inputs (each with its full utxoEntry), outputs, change, and the fee - ready for signing.

Query Parameters

context string Optional

In batch situations the user can use the context to correlate responses with requests. This property is present regardless of whether the response was successful or returned as an error. context is specified by the user.

Request Body Schema application/json

context string Optional

data object Required

item object Required

fromAddress string Required

Sender's Kaspa address. Its spendable UTXOs fund the transaction.

recipients array Items (object) Required

The transaction recipients. One output is created per entry (multiple recipients in one transaction are supported).

address string Required

Recipient's Kaspa address.

amount string Required

Amount to send to this recipient in KAS main units.

feeOptions object Optional

Fee configuration.

priority string Optional

Fee priority - slow, standard or fast.

exactAmount string Optional

Optional exact fee override in KAS. When set, the mass-based fee is bypassed.

prepareStrategy string Optional

Represents the UTXO-selection strategy.

locktime integer Optional

Optional transaction lock time.

Response Schema

apiVersion string Required

Specifies the version of the API that incorporates this endpoint.

2024-12-12

requestId string Required

Defines the ID of the request. The requestId is generated by Crypto APIs and it's unique for every request.

601c1710034ed6d407996b30

context string Optional

yourExampleString

data object Required

item object Required

inputs array Items (object) Required

The selected spendable UTXOs consumed as inputs.

address string Required

The address owning this input.

kaspa:qqszjeudt3cs42zakd7ch8z5h8peu2qjj0kvsa3n3tq2lg3hca56v8xrmm86p

transactionId string Required

The transaction id of the spent output.

7a700499c9bd00cf123648b3bf85347198e6cab4304afb2ddcc52fdcc6932a61

outputIndex integer Required

The output index within that transaction.

sompi string Required

The input amount in sompi.

5154323

outputs array Items (object) Required

The transaction outputs (recipient, and change back to the sender when present).

address string Required

The output address.

kaspa:qrualxl99gnkdd7nyz9hcm88vv5t8xxvhf5jy8vqxnhk3jymem8dxl0yq3c9c

sompi string Required

The output amount in sompi.

1000000

fee object Required

The mass-based fee, in KAS main units.

amount string Required

The fee amount.

0.00417034

unit string Required

The fee denomination.

KAS

feePerGram object Required

The fee rate used, in sompi per gram of transaction mass.

amount string Required

The fee rate.

218

unit string Required

The rate denomination.

sompi

mass string Required

The transaction mass (grams) the fee was derived from.

1913

version integer Required

Transaction version.

lockTime string Required

Transaction lock time.

subnetworkId string Required

Subnetwork id (all-zero for the native subnetwork).

0000000000000000000000000000000000000000

apiVersion string Required

Specifies the version of the API that incorporates this endpoint.

2024-12-12

requestId string Required

Defines the ID of the request. The requestId is generated by Crypto APIs and it's unique for every request.

601c1710034ed6d407996b30

context string Optional

yourExampleString

error object Required

code string Required

Specifies an error code, e.g. error 404.

uri_not_found

message string Required

Specifies the message of the error, i.e. why the error was returned, e.g. error 404 stands for “not found”.

The specified URI has not been found. Check the URI and try again.

details array Items (object) Optional

attribute string Required

Specifies an attribute of the error by name.

attribute which content caused the error

message string Required

Specifies the details of an attribute as part from the error.

message describing the error

code string Required

Specifies an error code, e.g. error 404.

limit_greater_than_allowed

message string Required

Specifies the message of the error, i.e. why the error was returned, e.g. error 404 stands for “not found”.

You have reached the allowed limit. The maximum number of items for this endpoint is {limit}, please use the specific pagination attributes to get the items in portions.

details array Items (object) Optional

attribute string Required

Specifies an attribute of the error by name.

attribute which content caused the error

message string Required

Specifies the details of an attribute as part from the error.

message describing the error

code string Required

Specifies an error code, e.g. error 404.

invalid_pagination

message string Required

Specifies the message of the error, i.e. why the error was returned, e.g. error 404 stands for “not found”.

The pagination attributes that have been used are invalid. Please check the Documentation to see details on pagination.

details array Items (object) Optional

attribute string Required

Specifies an attribute of the error by name.

attribute which content caused the error

message string Required

Specifies the details of an attribute as part from the error.

message describing the error

apiVersion string Required

Specifies the version of the API that incorporates this endpoint.

2024-12-12

requestId string Required

Defines the ID of the request. The requestId is generated by Crypto APIs and it's unique for every request.

601c1710034ed6d407996b30

context string Optional

yourExampleString

error object Required

code string Required

Specifies an error code, e.g. error 404.

missing_api_key

message string Required

Specifies the message of the error, i.e. why the error was returned, e.g. error 404 stands for “not found”.

The specific authorization header (API Key) is missing, please check our Authorization section in our Documentation.

details array Items (object) Optional

attribute string Required

Specifies an attribute of the error by name.

attribute which content caused the error

message string Required

Specifies the details of an attribute as part from the error.

message describing the error

code string Required

Specifies an error code, e.g. error 404.

invalid_api_key

message string Required

Specifies the message of the error, i.e. why the error was returned, e.g. error 404 stands for “not found”.

The provided API key is invalid. Please, generate a new one from your Dashboard.

details array Items (object) Optional

attribute string Required

Specifies an attribute of the error by name.

attribute which content caused the error

message string Required

Specifies the details of an attribute as part from the error.

message describing the error

apiVersion string Required

Specifies the version of the API that incorporates this endpoint.

2024-12-12

requestId string Required

Defines the ID of the request. The requestId is generated by Crypto APIs and it's unique for every request.

601c1710034ed6d407996b30

context string Optional

yourExampleString

error object Required

insufficient_credits

code string Required

Specifies an error code, e.g. error 404.

insufficient_credits

message string Required

Specifies the message of the error, i.e. why the error was returned, e.g. error 404 stands for “not found”.

You have insufficient credits. Please upgrade your plan from your Dashboard or contact our team via email.

details array Items (object) Optional

attribute string Required

Specifies an attribute of the error by name.

attribute which content caused the error

message string Required

Specifies the details of an attribute as part from the error.

message describing the error

apiVersion string Required

Specifies the version of the API that incorporates this endpoint.

2024-12-12

requestId string Required

Defines the ID of the request. The requestId is generated by Crypto APIs and it's unique for every request.

601c1710034ed6d407996b30

context string Optional

yourExampleString

error object Required

code string Required

Specifies an error code, e.g. error 404.

banned_ip_address

message string Required

Specifies the message of the error, i.e. why the error was returned, e.g. error 404 stands for “not found”.

This IP address has been banned. To check the reason for that, please contact our team via email.

details array Items (object) Optional

attribute string Required

Specifies an attribute of the error by name.

attribute which content caused the error

message string Required

Specifies the details of an attribute as part from the error.

message describing the error

code string Required

Specifies an error code, e.g. error 404.

endpoint_not_allowed_for_plan

message string Required

Specifies the message of the error, i.e. why the error was returned, e.g. error 404 stands for “not found”.

This endpoint is not available for your current subscription plan, please upgrade your plan to be able to use it.

details array Items (object) Optional

attribute string Required

Specifies an attribute of the error by name.

attribute which content caused the error

message string Required

Specifies the details of an attribute as part from the error.

message describing the error

code string Required

Specifies an error code, e.g. error 404.

endpoint_not_allowed_for_api_key

message string Required

Specifies the message of the error, i.e. why the error was returned, e.g. error 404 stands for “not found”.

This endpoint is not available for your API key.

details array Items (object) Optional

attribute string Required

Specifies an attribute of the error by name.

attribute which content caused the error

message string Required

Specifies the details of an attribute as part from the error.

message describing the error

code string Required

Specifies an error code, e.g. error 404.

feature_mainnets_not_allowed_for_plan

message string Required

Specifies the message of the error, i.e. why the error was returned, e.g. error 404 stands for “not found”.

Mainnets access is not available for your current subscription plan, please upgrade your plan to be able to use it.

details array Items (object) Optional

attribute string Required

Specifies an attribute of the error by name.

attribute which content caused the error

message string Required

Specifies the details of an attribute as part from the error.

message describing the error

apiVersion string Required

Specifies the version of the API that incorporates this endpoint.

2024-12-12

requestId string Required

Defines the ID of the request. The requestId is generated by Crypto APIs and it's unique for every request.

601c1710034ed6d407996b30

context string Optional

yourExampleString

error object Required

invalid_data

code string Required

Specifies an error code, e.g. error 404.

invalid_data

message string Required

Specifies the message of the error, i.e. why the error was returned, e.g. error 404 stands for “not found”.

The data provided seems to be invalid.

details array Items (object) Optional

attribute string Required

Specifies an attribute of the error by name.

attribute which content caused the error

message string Required

Specifies the details of an attribute as part from the error.

message describing the error

apiVersion string Required

Specifies the version of the API that incorporates this endpoint.

2024-12-12

requestId string Required

Defines the ID of the request. The requestId is generated by Crypto APIs and it's unique for every request.

601c1710034ed6d407996b30

context string Optional

yourExampleString

error object Required

unsupported_media_type

code string Required

Specifies an error code, e.g. error 404.

unsupported_media_type

message string Required

Specifies the message of the error, i.e. why the error was returned, e.g. error 404 stands for “not found”.

The selected Media Type is unavailable. The Content-Type header should be 'application/json'.

details array Items (object) Optional

attribute string Required

Specifies an attribute of the error by name.

attribute which content caused the error

message string Required

Specifies the details of an attribute as part from the error.

message describing the error

apiVersion string Required

Specifies the version of the API that incorporates this endpoint.

2024-12-12

requestId string Required

Defines the ID of the request. The requestId is generated by Crypto APIs and it's unique for every request.

601c1710034ed6d407996b30

context string Optional

yourExampleString

error object Required

invalid_request_body_structure

code string Required

Specifies an error code, e.g. error 404.

invalid_request_body_structure

message string Required

Specifies the message of the error, i.e. why the error was returned, e.g. error 404 stands for “not found”.

Your request body for POST requests must have a structure of { data: { item: [...properties] } }

details array Items (object) Optional

attribute string Required

Specifies an attribute of the error by name.

attribute which content caused the error

message string Required

Specifies the details of an attribute as part from the error.

message describing the error

apiVersion string Required

Specifies the version of the API that incorporates this endpoint.

2024-12-12

requestId string Required

Defines the ID of the request. The requestId is generated by Crypto APIs and it's unique for every request.

601c1710034ed6d407996b30

context string Optional

yourExampleString

error object Required

request_limit_reached

code string Required

Specifies an error code, e.g. error 404.

request_limit_reached

message string Required

Specifies the message of the error, i.e. why the error was returned, e.g. error 404 stands for “not found”.

The request limit has been reached. There can be maximum {requests} requests per {seconds} second(s) made. Please contact our team via email if you need more or upgrade your plan.

details array Items (object) Optional

attribute string Required

Specifies an attribute of the error by name.

attribute which content caused the error

message string Required

Specifies the details of an attribute as part from the error.

message describing the error

apiVersion string Required

Specifies the version of the API that incorporates this endpoint.

2024-12-12

requestId string Required

Defines the ID of the request. The requestId is generated by Crypto APIs and it's unique for every request.

601c1710034ed6d407996b30

context string Optional

yourExampleString

error object Required

unexpected_server_error

code string Required

Specifies an error code, e.g. error 404.

unexpected_server_error

message string Required

Specifies the message of the error, i.e. why the error was returned, e.g. error 404 stands for “not found”.

An unexpected server error has occurred, we are working to fix this. Please try again later and in case it occurs again please report it to our team via email.

details array Items (object) Optional

attribute string Required

Specifies an attribute of the error by name.

attribute which content caused the error

message string Required

Specifies the details of an attribute as part from the error.

message describing the error

Credits Cost

Blockchain protocol	Credits for 1 Results
Default Cost	60
Kaspa	60

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               {
    "context": "yourExampleString",
    "data": {
        "item": {
            "fromAddress": "kaspa:qqszjeudt3cs42zakd7ch8z5h8peu2qjj0kvsa3n3tq2lg3hca56v8xrmm86p",
            "recipients": [
                {
                    "address": "kaspa:qrualxl99gnkdd7nyz9hcm88vv5t8xxvhf5jy8vqxnhk3jymem8dxl0yq3c9c",
                    "amount": "0.02"
                }
            ],
            "feeOptions": {
                "priority": "standard",
                "exactAmount": "0.00417034"
            },
            "prepareStrategy": "minimize-dust",
            "locktime": 0
        }
    }
}

{
    "apiVersion": "2024-12-12",
    "requestId": "601c1710034ed6d407996b30",
    "context": "yourExampleString",
    "data": {
        "item": {
            "inputs": [
                {
                    "address": "kaspa:qqszjeudt3cs42zakd7ch8z5h8peu2qjj0kvsa3n3tq2lg3hca56v8xrmm86p",
                    "transactionId": "7a700499c9bd00cf123648b3bf85347198e6cab4304afb2ddcc52fdcc6932a61",
                    "outputIndex": 0,
                    "sompi": "5154323"
                }
            ],
            "outputs": [
                {
                    "address": "kaspa:qrualxl99gnkdd7nyz9hcm88vv5t8xxvhf5jy8vqxnhk3jymem8dxl0yq3c9c",
                    "sompi": "1000000"
                }
            ],
            "fee": {
                "amount": "0.00417034",
                "unit": "KAS"
            },
            "feePerGram": {
                "amount": "218",
                "unit": "sompi"
            },
            "mass": "1913",
            "version": 0,
            "lockTime": "0",
            "subnetworkId": "0000000000000000000000000000000000000000"
        }
    }
}

{
    "apiVersion": "2024-12-12",
    "requestId": "601c1710034ed6d407996b30",
    "context": "yourExampleString",
    "error": {
        "code": "uri_not_found",
        "message": "The specified URI has not been found. Check the URI and try again.",
        "details": [
            {
                "attribute": "attribute which content caused the error",
                "message": "message describing the error"
            }
        ]
    }
}

{
    "apiVersion": "2024-12-12",
    "requestId": "601c1710034ed6d407996b30",
    "context": "yourExampleString",
    "error": {
        "code": "limit_greater_than_allowed",
        "message": "You have reached the allowed limit. The maximum number of items for this endpoint is {limit}, please use the specific pagination attributes to get the items in portions.",
        "details": [
            {
                "attribute": "attribute which content caused the error",
                "message": "message describing the error"
            }
        ]
    }
}

{
    "apiVersion": "2024-12-12",
    "requestId": "601c1710034ed6d407996b30",
    "context": "yourExampleString",
    "error": {
        "code": "invalid_pagination",
        "message": "The pagination attributes that have been used are invalid. Please check the Documentation to see details on pagination.",
        "details": [
            {
                "attribute": "attribute which content caused the error",
                "message": "message describing the error"
            }
        ]
    }
}

{
    "apiVersion": "2024-12-12",
    "requestId": "601c1710034ed6d407996b30",
    "context": "yourExampleString",
    "error": {
        "code": "missing_api_key",
        "message": "The specific authorization header (API Key) is missing, please check our Authorization section in our Documentation.",
        "details": [
            {
                "attribute": "attribute which content caused the error",
                "message": "message describing the error"
            }
        ]
    }
}

{
    "apiVersion": "2024-12-12",
    "requestId": "601c1710034ed6d407996b30",
    "context": "yourExampleString",
    "error": {
        "code": "invalid_api_key",
        "message": "The provided API key is invalid. Please, generate a new one from your Dashboard.",
        "details": [
            {
                "attribute": "attribute which content caused the error",
                "message": "message describing the error"
            }
        ]
    }
}

{
    "apiVersion": "2024-12-12",
    "requestId": "601c1710034ed6d407996b30",
    "context": "yourExampleString",
    "error": {
        "code": "insufficient_credits",
        "message": "You have insufficient credits. Please upgrade your plan from your Dashboard or contact our team via email.",
        "details": [
            {
                "attribute": "attribute which content caused the error",
                "message": "message describing the error"
            }
        ]
    }
}

{
    "apiVersion": "2024-12-12",
    "requestId": "601c1710034ed6d407996b30",
    "context": "yourExampleString",
    "error": {
        "code": "banned_ip_address",
        "message": "This IP address has been banned. To check the reason for that, please contact our team via email.",
        "details": [
            {
                "attribute": "attribute which content caused the error",
                "message": "message describing the error"
            }
        ]
    }
}

{
    "apiVersion": "2024-12-12",
    "requestId": "601c1710034ed6d407996b30",
    "context": "yourExampleString",
    "error": {
        "code": "endpoint_not_allowed_for_plan",
        "message": "This endpoint is not available for your current subscription plan, please upgrade your plan to be able to use it.",
        "details": [
            {
                "attribute": "attribute which content caused the error",
                "message": "message describing the error"
            }
        ]
    }
}

{
    "apiVersion": "2024-12-12",
    "requestId": "601c1710034ed6d407996b30",
    "context": "yourExampleString",
    "error": {
        "code": "endpoint_not_allowed_for_api_key",
        "message": "This endpoint is not available for your API key.",
        "details": [
            {
                "attribute": "attribute which content caused the error",
                "message": "message describing the error"
            }
        ]
    }
}

{
    "apiVersion": "2024-12-12",
    "requestId": "601c1710034ed6d407996b30",
    "context": "yourExampleString",
    "error": {
        "code": "feature_mainnets_not_allowed_for_plan",
        "message": "Mainnets access is not available for your current subscription plan, please upgrade your plan to be able to use it.",
        "details": [
            {
                "attribute": "attribute which content caused the error",
                "message": "message describing the error"
            }
        ]
    }
}

{
    "apiVersion": "2024-12-12",
    "requestId": "601c1710034ed6d407996b30",
    "context": "yourExampleString",
    "error": {
        "code": "invalid_data",
        "message": "The data provided seems to be invalid.",
        "details": [
            {
                "attribute": "attribute which content caused the error",
                "message": "message describing the error"
            }
        ]
    }
}

{
    "apiVersion": "2024-12-12",
    "requestId": "601c1710034ed6d407996b30",
    "context": "yourExampleString",
    "error": {
        "code": "unsupported_media_type",
        "message": "The selected Media Type is unavailable. The Content-Type header should be 'application/json'.",
        "details": [
            {
                "attribute": "attribute which content caused the error",
                "message": "message describing the error"
            }
        ]
    }
}

{
    "apiVersion": "2024-12-12",
    "requestId": "601c1710034ed6d407996b30",
    "context": "yourExampleString",
    "error": {
        "code": "invalid_request_body_structure",
        "message": "Your request body for POST requests must have a structure of { data: { item: [...properties] } }",
        "details": [
            {
                "attribute": "attribute which content caused the error",
                "message": "message describing the error"
            }
        ]
    }
}

{
    "apiVersion": "2024-12-12",
    "requestId": "601c1710034ed6d407996b30",
    "context": "yourExampleString",
    "error": {
        "code": "request_limit_reached",
        "message": "The request limit has been reached. There can be maximum {requests} requests per {seconds} second(s) made. Please contact our team via email if you need more or upgrade your plan.",
        "details": [
            {
                "attribute": "attribute which content caused the error",
                "message": "message describing the error"
            }
        ]
    }
}

{
    "apiVersion": "2024-12-12",
    "requestId": "601c1710034ed6d407996b30",
    "context": "yourExampleString",
    "error": {
        "code": "unexpected_server_error",
        "message": "An unexpected server error has occurred, we are working to fix this. Please try again later and in case it occurs again please report it to our team via email.",
        "details": [
            {
                "attribute": "attribute which content caused the error",
                "message": "message describing the error"
            }
        ]
    }
}

Prepare Kaspa Transaction

Query Parameters

Request Body Schema application/json

Response Schema

Credits Cost

Security schema

URL Schema

Request