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Get UTxO details on CardanoIn this guide, you will learn to query Cardano and extract UTxO information by leveraging the UTxOs at an Address endpoint.

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Prerequisites

Before submitting an API request, ensure you have completed the following:

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Steps to Submit an API Request

The API allows applications to retrieve detailed information on UTxOs controlled by a specific address. In this example, we will use the Cardano Preprod as the selected network for our project.

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1. Select the Network

  • Ensure your project is configured to use Cardano Preprod.

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2. Retrieve Transaction Output

  • Use the following endpoint to get a list of all UTxOs that reside at the specified Cardano address or script pubkey:
/addresses/\:address/utxos

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3. Specify Path Parameters

  • Include the required path parameters in your request:
ParameterData TypeDescriptionRequired
addressStringThe address in Bech32 format to query UTxOs.yes

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4. Specify Query Parameters (Optional)

  • Include optional query parameters as needed:
ParameterData TypeDescriptionRequired
assetStringReturns only UTxOs containing a specific asset (formatted as concatenation of hex-encoded policy and asset name).no
resolve_datumsBooleanIf true, include corresponding datums for datum hashes in the response.no
with_cborBooleanIf true, includes CBOR encodings of transaction outputs in the response.no
countIntegerMaximum number of results to return per page.no
orderStringSort order for results (asc for ascending or desc for descending).no
fromint64Returns only UTxOs created on or after a specific slot number.no
toint64Returns only UTxOs created on or before a specific slot number.no
cursorStringPagination cursor string to fetch the next page of results.

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5. Send the API Request

  • Use cURL or your preferred tool to send the API request:
For this example, we will use:
  • address: addr_test1wzdtu0djc76qyqak9cj239udezj2544nyk3ksmfqvaksv7c9xanpg
  • order: asc
Curl
curl -L -X GET \
-H "Accept: application/json" \
-H "api-key: <API_KEY_VALUE>" \
'https://preprod.gomaestro-api.org/v1/addresses/addr_test1wzdtu0djc76qyqak9cj239udezj2544nyk3ksmfqvaksv7c9xanpg/utxos?order=asc'

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6. Review the Response

The API will return a response like the following:
JSON
{
    "data": [
        {
            "tx_hash": "6c1bbfff3b22f189b325fee3f51eceacf13090aae895e912c56ec615efacb3e0",
            "index": 0,
            "slot": 57115432,
            "assets": [
                {
                    "unit": "lovelace",
                    "amount": 1224040
                },
                {
                    "unit": "0c64d6d0371d11185aae649cf3a169040e94214137137b531ebb16c2446a65644f7261636c654e4654",
                    "amount": 1
                }
            ],
            "address": "addr_test1wzdtu0djc76qyqak9cj239udezj2544nyk3ksmfqvaksv7c9xanpg",
            "datum": {
                "type": "hash",
                "hash": "065191b95752a6ecca365cfd19a68f8968215596fbfc94f1fbc8ab0053d9110f",
                "bytes": null,
                "json": null
            },
            "reference_script": null,
            "txout_cbor": null
        }
    ],
    "last_updated": {
        "timestamp": "2024-09-11 23:22:19",
        "block_hash": "053a9d8a812db204a32ddbb90834128ec8f94a3de2c990caa413dd55ae30d5c1",
        "block_slot": 70413739
    },
    "next_cursor": null
}

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7. Understanding the Response

TermDefinition
tx_hashThe unique identifier of the transaction that created this UTXO.
indexThe output index of this UTXO within the transaction.
slotThe slot number at which this UTXO was created.
assetsA list of assets contained in this UTXO, including their unit (type) and amount.
addressThe address associated with this UTXO.
datum.typeThe type of datum associated with this UTXO (e.g., “hash”).
datum.hashThe hash of the datum associated with this UTXO.
datum.bytesThe byte representation of the datum (if available), otherwise null.
datum.jsonThe JSON representation of the datum (if available), otherwise null.
reference_scriptA reference to a script associated with this UTXO, if any, otherwise null.
txout_cborThe CBOR encoding of the transaction output, if available, otherwise null.
last_updated.timestampThe timestamp indicating when the data was last updated.
last_updated.block_hashThe hash of the block where the UTXO data was last updated.
last_updated.block_slotThe slot number of the block where the UTXO data was last updated.
next_cursorA pointer to the next set of data if there are more results; otherwise null.
Next StepsCongrats! Now that you’ve made your API request, let’s Submit Your First Transaction.
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