> ## Documentation Index > Fetch the complete documentation index at: https://docs.abbyy.com/llms.txt > Use this file to discover all available pages before exploring further. # Extraction of main invoice fields > Extract main invoice fields with FlexiCapture for Invoices Cloud by uploading a file, running a capture task, polling the status, and downloading results. ABBYY FlexiCapture for Invoices Cloud includes a ready-to-use application designed specifically for invoice processing. This application recognizes and extracts all necessary data fields from most documents without any additional adjustments. For a detailed list of fields that are extracted from invoices by default, see the [Captured fields](/flexi-capture/cloud/cloud-f-cfor-invoices-fields) section. Follow the steps below to process invoices. Get the authorization header using the credentials of one of your applications. For details, see the [Authentication](/flexi-capture/cloud/cloud-f-cfor-invoices-api-auth) section. The examples below use the sample header `Basic QWxhZGRpbjpPcGVuU2VzYW1l`. Upload a file in a valid [input format](/flexi-capture/cloud/cloud-f-cfor-invoices-formats) to the server using the [File.Upload](/flexi-capture/cloud/cloud-f-cfor-invoices-api-upload-file) method. In the response, you get the file's identifier and token, which are used in all subsequent requests concerning the file. ```bash theme={null} curl -X POST \ --header "Accept: application/json" \ --header "Authorization: Basic QWxhZGRpbjpPcGVuU2VzYW1l" \ --form "file=@/path/to/file/US_1.png" \ "https://api-eu.flexicapture.com/v2/file" ``` The response contains the uploaded file's metadata: ```json theme={null} { "id": "5eeb762149c6470fdc65a84c", "token": "4B5A1A00E7A82C2AF31E20CADE7284DDA43DED30", "name": "US_1.png", "extension": ".png", "hash": "E75133BA4FC50B7197C2842D7A8A8AE615C37E38714C7773B1F8E2904EC62537A199129CD3B737673FBAB1DE63CBD5D428705443ADD2E1BA6223B7DD60070FDA", "size": 369090, "mime": "image/png", "is_recognizable": true, "account": "5dae591d3c66a51ae8be9896", "application": "5dae591e91375010bcd78362", "email": "user@abbyy.com", "created": "2020-02-02T14:11:45.5338461Z", "expiring": "2020-03-03T14:11:45.5338254Z" } ``` Start a processing task to begin data extraction using the Task.Run method. You can specify multiple files in this request. The request may contain the following optional parameters: invoice [region](/flexi-capture/cloud/cloud-f-cfor-invoices-languages), verification type, and the [export format](/flexi-capture/cloud/cloud-f-cfor-invoices-formats) for the results. The response contains a task identifier, which you need in the next steps. ```bash theme={null} curl -X POST \ --header "Content-Type: application/json" \ --header "Accept: application/json" \ --header "Authorization: Basic QWxhZGRpbjpPcGVuU2VzYW1l" \ -d '{ "properties": { "region": "US", "export_format": "Xls", "verification_type": "NoVerification" }, "files": [ { "id": "5eeb762149c6470fdc65a84c", "token": "4B5A1A00E7A82C2AF31E20CADE7284DDA43DED30" } ] }' \ "https://api-eu.flexicapture.com/v2/task/capture/invoices" ``` The response describes the newly created task: ```json theme={null} { "id": "5eeb7bf728613d1e04a70782", "number": "1126563", "batch_id": 0, "type": "ic", "is_realtime_enabled": false, "processing_priority": "Normal", "is_demo": false, "properties": { "region": "US", "export_format": "Xls", "verification_type": "NoVerification" }, "account": "5dae591d3c66a51ae8be9896", "email": "user@abbyy.com", "application": "5dae591e91375010bcd78362", "created": "2020-02-02T14:36:39.441Z", "progress": 0, "status": "Submitted", "is_deleted": false, "is_billed": false, "documents": [ { "files": { "source": { "id": "5eeb762149c6470fdc65a84c", "token": "4B5A1A00E7A82C2AF31E20CADE7284DDA43DED30", "name": "US_1.png" } }, "data": {}, "is_moved": false } ], "is_extra_error": false } ``` Processing the task takes some time, so the extracted data is not available immediately. Check the task status using the identifier you received when starting the task, with the [Task.Get](/flexi-capture/cloud/cloud-f-cfor-invoices-api-get-task) method. Wait until the status changes to `Done`. ```bash theme={null} curl -X GET \ --header "Accept: application/json" \ --header "Authorization: Basic QWxhZGRpbjpPcGVuU2VzYW1l" \ "https://api-eu.flexicapture.com/v2/task/5eeb7bf728613d1e04a70782" ``` When the task is complete, the response includes the `target` files to download: ```json theme={null} { "id": "5eeb7bf728613d1e04a70782", "number": "1126563", "batch_id": 2640691, "type": "ic", "is_realtime_enabled": false, "processing_priority": "Normal", "is_demo": false, "properties": { "region": "US", "export_format": "Xls", "verification_type": "NoVerification" }, "account": "5dae591d3c66a51ae8be9896", "email": "user@abbyy.com", "application": "5dae591e91375010bcd78362", "created": "2020-02-02T14:36:39.441Z", "started": "2020-02-02T14:36:50.308Z", "billed": "2020-02-02T14:37:14.35Z", "delivered": "2020-02-02T14:37:14.328Z", "progress": 100, "status": "Done", "is_deleted": false, "is_billed": true, "documents_count": 1, "pages_count": 1, "documents": [ { "files": { "source": { "id": "5eeb762149c6470fdc65a84c", "token": "4B5A1A00E7A82C2AF31E20CADE7284DDA43DED30", "name": "US_1.png" }, "target": { "id": "5eeb7c1963ee5a1268123b96", "token": "A01EFC05BBB787DC6825F08E51B56CF3E066210E", "name": "Data_00000001.xls" }, "verification_layer_page_0": { "id": "5eeb7c1a63ee5a1268123b97", "token": "18921FFB4C944056CB3ED00768F90724ADF0CB69", "name": "verification_layer_page_2.xml" } }, "data": { "region": "us", "export_format": "xls", "verification_type": "noverification", "vendor_id": "1", "vendor_name": "AA APPAREL", "total": "20208", "currency": "USD" }, "is_moved": false } ], "is_extra_error": false } ``` After the status changes to `Done`, download the output files using their identifiers and tokens (the `target` file information in the response from the previous step), with the [File.Download](/flexi-capture/cloud/cloud-f-cfor-invoices-api-download-file) method. Repeat this request for each input file in the task request. ```bash theme={null} curl -X GET \ --header "Accept: application/json" \ --header "Authorization: Basic QWxhZGRpbjpPcGVuU2VzYW1l" \ "https://api-eu.flexicapture.com/v2/file/5eeb7c1963ee5a1268123b96/A01EFC05BBB787DC6825F08E51B56CF3E066210E" ``` If successful, the server returns a 200 OK HTTP status and the file contents. After downloading the output data, delete the task to remove all input and output files, using the Task.Delete method with the task identifier. ```bash theme={null} curl -X DELETE \ --header "Accept: application/json" \ --header "Authorization: Basic QWxhZGRpbjpPcGVuU2VzYW1l" \ "https://api-eu.flexicapture.com/v2/task/5eeb7bf728613d1e04a70782" ``` If successful, the server returns a `204 No Content` HTTP status. If the request contains errors, the server returns one of the HTTP response codes to indicate the reason for failure. For details, see the [Request errors](/flexi-capture/cloud/cloud-f-cfor-invoices-api-errors) section.