v2 .2026-03-20

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General Information

Rest APIs

Validate UTXO Transfer

POST

/vaults/{vaultId}/transaction-requests/utxo-transfer/validate

A dry-run version of the Create UTXO Transfer endpoint transfer without executing it. This side-effect-free endpoint accepts the standard transfer parameters but only computes and returns a complete transaction preview. Use it to verify details and confirm fees before submission.

Path Parameters

vaultId string Required

Unique identifier of the vault.

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

assetId string Required

Unique internal identifier of the blockchain asset involved in the transaction.(UTXO-based blockchains only).

changeData object Optional

An optional object that specifies where the transaction's change output should be sent — that is, the leftover balance after the recipient amounts and the network fee have been deducted from the spent UTXOs. Mutually exclusive with feePayer.

address string Optional

A specific destination address for the change output. When provided, the server uses this address as-is and no new address is derived.

vaultAccountId string Optional

When provided, the server selects or derives a change address inside the specified vault account. The vault account must belong to the same vault as the transaction.

feePayer string Optional

Fee payer address — must belong to the vault and be on the same chain as the senders. Mutually exclusive with changeData and gross.

feePriority string Required

Fee priority: slow, standard, or fast.

gross boolean Optional

Whether the recipient amounts are gross (fee deducted from them). Mutually exclusive with fee payer.

maxFee string Optional

Maximum fee the caller is willing to pay. The transaction fails with MAX_FEE_EXCEEDED if exceeded.

note string Optional

Short human-readable description to the transaction request. (max 250 characters)

recipients array Items (object) Required

Destinations for the transaction. Transfer recipients (1 to 150).

address string Required

Recipient address.

amount string Required

Amount to send (native unit, e.g. BTC)

senders array Items (object) Required

UTXOs to spend (1 to 150). May span multiple vault accounts within the same vault.

utxoId string Required

A unique identifier referencing a specific unspent transaction output (UTXO).

Response Schema

apiVersion string Required

Specifies the version of the API that incorporates this endpoint.

2026-03-20

requestId string Required

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

601c1710034ed6d407996b30

context string Optional

yourExampleString

data object Required

item object Required

error string Optional

Error message if validation failed.

MAX_FEE_EXCEEDED

feeInNative string Required

Calculated transaction fee.

0.00001698

inputAmount string Required

Total input amount.

0.00426833

inputSize string Required

Size of the transaction inputs in weight units (vbytes).

367.5

outputAmount string Required

Total output amount.

0.00426506

outputSize string Required

Size of the transaction outputs in weight units (vbytes)

recipients array Items (object) Required

Destinations of the transaction.

address string Required

Address of the destination.

bc1qut6n59lceee7s94g5qme08yzu8evd2yfjuuu3k

amount string Required

Defines the amount sent to the destination address.

0.001

recipientsValid boolean Required

Whether all recipients are valid.

true

senders array Items (object) Required

Resolved senders (per-UTXO breakdown), each carries its own vault account id to disambiguate multi-vault-account transfers.

address string Required

UTXO owning address.

tb1q84p9dwvfgy4q2tj2fz27n6c6g7xd2x2p69hpck

addressLabel string Optional

Label of the UTXO address, if one has been assigned.

Bitcoin

amount string Required

UTXO amount in native unit.

0.001

utxoId string Required

A unique identifier referencing a specific unspent transaction output (UTXO).

6a1e8633451fe82cc50db5cc

vaultAccountId string Required

Owning vault account id for this UTXO.

69e2229d96c8640007743e6c

sendersValid boolean Required

Whether all senders are valid.

true

size string Required

Transaction size in bytes.

460.5

apiVersion string Required

Specifies the version of the API that incorporates this endpoint.

2026-03-20

requestId string Required

Defines the ID of the request. The requestId is generated by Vaultody 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.

2026-03-20

requestId string Required

Defines the ID of the request. The requestId is generated by Vaultody 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.

2026-03-20

requestId string Required

Defines the ID of the request. The requestId is generated by Vaultody 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.

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.

2026-03-20

requestId string Required

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

601c1710034ed6d407996b30

context string Optional

yourExampleString

error object Required

resource_not_found

code string Required

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

resource_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 resource has not been found.

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.

2026-03-20

requestId string Required

Defines the ID of the request. The requestId is generated by Vaultody 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.

2026-03-20

requestId string Required

Defines the ID of the request. The requestId is generated by Vaultody 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.

2026-03-20

requestId string Required

Defines the ID of the request. The requestId is generated by Vaultody 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.

2026-03-20

requestId string Required

Defines the ID of the request. The requestId is generated by Vaultody 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.

2026-03-20

requestId string Required

Defines the ID of the request. The requestId is generated by Vaultody 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

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               {
    "context": "yourExampleString",
    "data": {
        "item": {
            "assetId": "6523e058a06ebf1322d7dd6f",
            "changeData": {
                "address": "tb1q5awmgf957klhfpr3f9ksc7lvmzdjnm3ucn3tz2",
                "vaultAccountId": "69e5d838859b6c00073fa8b7"
            },
            "feePayer": "tb1qjhmfv6pxcaz8943ytnvpd9hat083ennar56has",
            "feePriority": "slow",
            "gross": false,
            "maxFee": "0.00005",
            "note": "yourAdditionalInformationhere",
            "recipients": [
                {
                    "address": "bc1qut6n59lceee7s94g5qme08yzu8evd2yfjuuu3k",
                    "amount": "0.001"
                }
            ],
            "senders": [
                {
                    "utxoId": "6a1e8633451fe82cc50db5cc"
                }
            ]
        }
    }
}

{
    "apiVersion": "2026-03-20",
    "requestId": "601c1710034ed6d407996b30",
    "context": "yourExampleString",
    "data": {
        "item": {
            "error": "MAX_FEE_EXCEEDED",
            "feeInNative": "0.00001698",
            "inputAmount": "0.00426833",
            "inputSize": "367.5",
            "outputAmount": "0.00426506",
            "outputSize": "93",
            "recipients": [
                {
                    "address": "bc1qut6n59lceee7s94g5qme08yzu8evd2yfjuuu3k",
                    "amount": "0.001"
                }
            ],
            "recipientsValid": true,
            "senders": [
                {
                    "address": "tb1q84p9dwvfgy4q2tj2fz27n6c6g7xd2x2p69hpck",
                    "addressLabel": "Bitcoin",
                    "amount": "0.001",
                    "utxoId": "6a1e8633451fe82cc50db5cc",
                    "vaultAccountId": "69e2229d96c8640007743e6c"
                }
            ],
            "sendersValid": true,
            "size": "460.5"
        }
    }
}

{
    "apiVersion": "2026-03-20",
    "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": "2026-03-20",
    "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": "2026-03-20",
    "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": "2026-03-20",
    "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": "2026-03-20",
    "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": "2026-03-20",
    "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": "2026-03-20",
    "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": "2026-03-20",
    "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": "2026-03-20",
    "requestId": "601c1710034ed6d407996b30",
    "context": "yourExampleString",
    "error": {
        "code": "resource_not_found",
        "message": "The specified resource has not been found.",
        "details": [
            {
                "attribute": "attribute which content caused the error",
                "message": "message describing the error"
            }
        ]
    }
}

{
    "apiVersion": "2026-03-20",
    "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": "2026-03-20",
    "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": "2026-03-20",
    "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": "2026-03-20",
    "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": "2026-03-20",
    "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"
            }
        ]
    }
}

Validate UTXO Transfer

Path Parameters

Query Parameters

Request Body Schema application/json

Response Schema

Security schema

URL Schema

Request