Integration · Accounting

Connect Claude & ChatGPT to inFakt

Ask your AI which invoices are still unpaid, what a client has been billed, or to issue a new sales invoice in inFakt. It can create clients, products and corrective invoices, email invoices, mark them paid and submit them to KSeF, the Polish National e-Invoice System. It can also read your cost documents and download invoice PDFs.

Connect inFakt free

Free plan, no credit card. Takes about a minute.

Try asking

“Which sales invoices are still unpaid?”
The AI lists your invoices and shows the ones not yet paid, with client, amount and status.
“Invoice Kowalski Sp. z o.o. for 10 hours of consulting at 200 PLN net.”
It checks the VAT rates, creates the invoice and follows the creation status until the new invoice is ready.
“Email that invoice to the client in English.”
It sends the invoice by email to the client's address with English as the language.

What your AI can do

Sales invoices

List and read invoices, create new ones, email them, mark them paid, share a public link and download the PDF.

Clients and products

List, read and create clients and products with prices and VAT rates, and see the number the next invoice will get.

Corrections, costs and KSeF

Create and read corrective invoices, read cost documents and submit invoices to KSeF.

“The client paid invoice 45. Mark it as paid.”
It finds the invoice and marks it as paid.
“Issue a corrective invoice for the wrong quantity on last week's invoice.”
It creates a corrective invoice that points to the original invoice number, with the correction reason and the corrected lines.
“Send today's invoices to KSeF.”
It submits each invoice to KSeF. This is an official tax filing and cannot be undone.

190 tools for inFakt

These tools are switched on when you connect. You can switch any of them off, or require your approval before it runs.

attach_cost_category_many_jsonChanges dataAssign a cost. API summary: Przypisz kategorię kosztu.
create_advance_invoices_jsonChanges dataCreate a new advance invoices json. API summary: Stwórz.
create_bank_accounts_jsonChanges dataCreate a new bank accounts json. API summary: Stwórz.
create_clientChanges dataCreate a client. Pass `client` with company or first/last name, address fields, country and business activity kind. List clients first to avoid duplicates.
create_corrective_invoiceChanges dataCreate a corrective invoice for an existing invoice: pass `corrective_invoice` with `corrected_invoice_number`, `correction_reason`, client details and corrected `services`.
create_corrective_invoices_jsonChanges dataCreate a new corrective invoices json. API summary: Stwórz.
create_corrective_oss_invoices_jsonChanges dataCreate a new corrective oss invoices json. API summary: Tworzenie.
create_corrective_oss_invoices_json_postChanges dataCreate a new corrective oss invoices json. API summary: (PRZESTARZAŁE) Synchroniczne tworzenie.
create_cost_note_many_jsonChanges dataCreate a new cost. API summary: Stwórz notatke.
create_daily_revenues_jsonChanges dataCreate a new daily revenues json. API summary: Stwórz.
create_daily_revenues_json_postChanges dataCreate a new daily revenues json. API summary: (PRZESTARZAŁE) Stwórz synchronicznie utarg dzienny.
create_document_requests_jsonChanges dataCreate a new document requests json. API summary: Wygeneruj link do płatności.
create_final_invoices_jsonChanges dataCreate a new final invoices json. Required: body. API summary: Stwórz.
create_final_invoices_json_postChanges dataCreate a new final invoices json. Required: body. API summary: (PRZESTARZAŁE) Stwórz synchronicnzie.
create_fiscal_reports_jsonChanges dataCreate a new fiscal reports json. API summary: Stwórz.
create_fiscal_reports_json_postChanges dataCreate a new fiscal reports json. API summary: (PRZESTARZAŁE) Synchroniczne tworzenie raportu fiskalnego.
create_income_tax_paid_jsonChanges dataCreate a new paid json for a income tax. API summary: Oznacz jako zapłacony.
create_insurance_fee_paid_jsonChanges dataCreate a new paid json for a insurance fee. API summary: Oznaczacz składkę jako zapłacona.
create_integration_jsonChanges dataCreate a new integration json. API summary: Stwórz.
create_internal_evidences_jsonChanges dataCreate a new internal evidences json. API summary: Stwórz.
create_internal_evidences_json_postChanges dataCreate a new internal evidences json. API summary: (PRZESTARZAŁE) Synchroniczne tworzenie.
create_internal_invoices_jsonChanges dataCreate a new internal invoices json. API summary: Stwórz.
create_internal_invoices_json_postChanges dataCreate a new internal invoices json. API summary: (PRZESTARZAŁE) Synchroniczne tworzenie faktury wewnętrznej.
create_invoiceChanges dataCreate a sales invoice. Pass `invoice` with `client_company_name` (or other client fields), `payment_method`, `status` and `services` (name, net price, tax symbol). Creation is asynchronous: it returns a task reference to check with get_invoice_creation_status. Set `send_to_ksef` to also submit it to KSeF.
create_invoice_deliver_via_email_json_2Visible to othersCreate a new deliver via email json for a invoice. Has effects visible outside this system. API summary: Wyślij email.
create_invoice_deliver_via_email_json_3Visible to othersCreate a new deliver via email json for a invoice. Has effects visible outside this system. API summary: Wyślij email.
create_invoice_deliver_via_email_json_4Visible to othersCreate a new deliver via email json for a invoice. Has effects visible outside this system. API summary: Wyślij emailem.
create_invoice_deliver_via_email_json_5Visible to othersCreate a new deliver via email json for a invoice. Has effects visible outside this system. API summary: Wyślij emailem.
create_invoice_deliver_via_email_json_postVisible to othersCreate a new deliver via email json for a invoice. Has effects visible outside this system. API summary: Wyślij email.
create_invoice_paid_json_2Changes dataCreate a new paid json for a invoice. Required: body. API summary: Oznacz jako zapłacona.
create_invoice_paid_json_3Changes dataCreate a new paid json for a invoice. Required: body. API summary: Oznacz jako zapłacona.
create_invoice_paid_json_4Changes dataCreate a new paid json for a invoice. Required: body. API summary: Oznacz jako zapłacona.
create_invoice_paid_json_postChanges dataCreate a new paid json for a invoice. Required: body. API summary: Oznacz jako zapłacona.
create_invoice_quick_payments_jsonChanges dataCreate a new quick payments json for a invoice. API summary: Stwórz szybką płatność.
create_invoice_share_linkChanges dataCreate a public share link for an invoice (`invoice_uuid`) that the client can open without logging in.
create_margin_invoices_jsonChanges dataCreate a new margin invoices json. API summary: Stwórz.
create_margin_invoices_json_postChanges dataCreate a new margin invoices json. API summary: (PRZESTARZAŁE) Synchroniczne tworzenie faktury marża.
create_oss_invoices_jsonChanges dataCreate a new oss invoices json. API summary: Stwórz.
create_oss_invoices_json_postChanges dataCreate a new oss invoices json. API summary: (PRZESTARZAŁE) Synchroniczne tworzenie.
create_productChanges dataCreate a product or service. Pass `product` with name, unit, net or gross price and tax symbol.
create_prolong_jsonChanges dataCreate a new prolong json. API summary: Wydłuż czas linku.
create_saf_v7_file_paid_jsonChanges dataCreate a new paid json for a saf v7 file. API summary: Oznaczacz jako zapłacony.
delete_costs_many_jsonMoves moneyPermanently delete a cost. Financial or irreversible action; may require approval. API summary: Usuń.
delete_integration_jsonsMoves moneyPermanently delete a integration json. Financial or irreversible action; may require approval. API summary: Usuń.
delete_invoiceMoves moneyPermanently delete an invoice by `json_uuid`. Cannot be undone; invoices already sent to KSeF should be corrected instead.
delete_invoice_quick_payments_jsonsMoves moneyPermanently delete a quick payments json by invoice uuid. Financial or irreversible action; may require approval. API summary: Usuń szybką płatność.
delete_invoice_share_links_jsonsMoves moneyPermanently delete a share links json by invoice uuid. Financial or irreversible action; may require approval. API summary: Usuń link.
delete_jsons_10Moves moneyPermanently delete a json by json uuid. Financial or irreversible action; may require approval. API summary: Usuń.
delete_jsons_11Moves moneyPermanently delete a json by json id. Financial or irreversible action; may require approval. API summary: Usuń.
delete_jsons_12Moves moneyPermanently delete a json by json id. Financial or irreversible action; may require approval. API summary: Usuwanie.
delete_jsons_13Moves moneyPermanently delete a json by json id. Financial or irreversible action; may require approval. API summary: Usuń.
delete_jsons_2Moves moneyPermanently delete a json by json uuid. Financial or irreversible action; may require approval. API summary: Usuń.
delete_jsons_3Moves moneyPermanently delete a json by json uuid. Financial or irreversible action; may require approval. API summary: Usuń.
delete_jsons_4Moves moneyPermanently delete a json by json uuid. Financial or irreversible action; may require approval. API summary: Usuń.
delete_jsons_5Moves moneyPermanently delete a json by json uuid. Financial or irreversible action; may require approval. API summary: Usuń.
delete_jsons_6Moves moneyPermanently delete a json by json uuid. Financial or irreversible action; may require approval. API summary: Usuwanie.
delete_jsons_7Moves moneyPermanently delete a json by json uuid. Financial or irreversible action; may require approval. API summary: Usuń.
delete_jsons_8Moves moneyPermanently delete a json by json uuid. Financial or irreversible action; may require approval. API summary: Usuń.
delete_jsons_9Moves moneyPermanently delete a json by json uuid. Financial or irreversible action; may require approval. API summary: Usuń.
delete_jsons_deleteMoves moneyPermanently delete a json by json uuid. Financial or irreversible action; may require approval. API summary: Usuń.
download_aad18da0_5741_42a1_b205_4ee2933559ea_xml_jsonDownload the document for a aad18da0 5741 42a1 b205 4ee2933559ea. API summary: Pobranie faktury w XML.
download_cost_many_jsonDownload the document for a cost. API summary: Pobierz załączniki w .zip.
download_daily_revenue_pdf_jsonDownload the pdf document for a daily revenue. API summary: Pobierz jako PDF.
download_income_pdf_many_jsonChanges dataDownload the pdf document for a income. API summary: Zleć generowanie dokumentów.
download_internal_evidence_pdf_jsonDownload the pdf document for a internal evidence. API summary: Pobierz w formacie PDF.
download_invoice_pdfDownload an invoice as PDF by `invoice_uuid`.
download_invoice_pdf_json_2Download the pdf document for a invoice. API summary: Pobierz PDF.
download_invoice_pdf_json_3Download the pdf document for a invoice. API summary: Pobierz PDF.
download_invoice_pdf_json_4Download the pdf document for a invoice. API summary: Pobierz plik PDF.
download_invoice_pdf_json_5Download the pdf document for a invoice. API summary: Pobranie w formacie PDF.
download_invoice_pdf_json_getDownload the pdf document for a invoice. API summary: Pobierz PDF.
download_invoice_pdf_json_pdfDownload the pdf document for a invoice. API summary: Pobierz PDF.
download_invoice_xml_jsonDownload the document for a invoice. API summary: Pobierz XML KSeF.
download_invoice_xml_json_2Download the document for a invoice. API summary: Pobierz XML KSeF.
download_invoice_xml_json_3Download the document for a invoice. API summary: Pobierz XML KSeF.
download_invoice_xml_json_downloadDownload the document for a invoice. API summary: Pobierz XML KSeF.
download_invoice_xml_json_getDownload the document for a invoice. API summary: Pobierz XML KSeF.
get_aad18da0_5741_42a1_b205_4ee2933559ea_status_jsonGet the current status of a aad18da0 5741 42a1 b205 4ee2933559ea. API summary: Sprawdź status wysyłki.
get_aad18da0_5741_42a1_b205_4ee2933559ea_status_json_statusGet the current status of a aad18da0 5741 42a1 b205 4ee2933559ea. API summary: Sprawdź status wysyłki.
get_account_detailsGet the connected inFakt account's company details (name, tax number, address).
get_clientGet one client by ID (`json_id`).
get_corrective_invoiceGet one corrective invoice by its UUID (`json_uuid`).
get_costGet one cost document by UUID (`json_document_uuid`).
get_invoiceGet one invoice by its UUID (`json_uuid`), with line items, client and payment details.
get_invoice_creation_statusCheck the status of an asynchronous invoice creation by `invoice_task_reference_number` and get the new invoice's UUID when done.
get_next_invoice_numberGet the number the next sales invoice will receive.
get_productGet one product by ID (`json_id`).
import_faktur_kosztowychList costs jsons. API summary: Import faktur kosztowych.
import_faktur_przychodowychList incomes jsons. API summary: Import faktur przychodowych.
import_pojedynczej_fakturyList 7343521162 20231004 47 a70 d8 bd670 57 jsons. API summary: Import pojedynczej faktury.
list_7343521162_20231004_47_a70_d8_bd670_57_jsonsList 7343521162 20231004 47 a70 d8 bd670 57 jsons. API summary: Import pojedynczej faktury.
list_activities_jsonsList activities jsons. API summary: Pobierz historię zdarzeń.
list_advance_invoices_jsonsList advance invoices jsons. API summary: Listuj.
list_bank_accountsList the bank accounts configured for receiving invoice payments.
list_books_jsonsList books jsons. API summary: Listuj.
list_clientsList clients (customers) with their names, tax numbers and addresses.
list_corrective_invoicesList corrective invoices (credit notes).
list_corrective_oss_invoices_jsonsList corrective oss invoices jsons. API summary: Listowanie.
list_costsList cost documents (purchase invoices and expenses).
list_costs_jsons_getList costs jsons. API summary: Import faktur kosztowych.
list_countries_jsonsList countries jsons. API summary: Listuj.
list_daily_revenues_jsonsList daily revenues jsons. API summary: Listuj.
list_final_invoices_jsonsList final invoices jsons. API summary: Listuj.
list_fiscal_reports_jsonsList fiscal reports jsons. API summary: Listuj.
list_flat_rates_jsonsList flat rates jsons. API summary: Listuj.
list_gtus_jsonsList gtus jsons. API summary: Listuj wszystkie.
list_income_taxes_jsonsList income taxes jsons. API summary: Listuj.
list_incomes_jsonsList incomes jsons. API summary: Listuj wszystkie.
list_incomes_jsons_getList incomes jsons. API summary: Import faktur przychodowych.
list_insurance_fees_jsonsList insurance fees jsons. API summary: Listuj.
list_integration_jsonsList integration jsons. API summary: Sprawdź status.
list_integration_jsons_getList integration jsons. API summary: Sprawdź status.
list_internal_evidences_jsonsList internal evidences jsons. API summary: Listuj.
list_internal_invoices_jsonsList internal invoices jsons. API summary: Listuj.
list_invoice_attachments_jsonsList attachments jsons for a invoice. API summary: Listuj załączniki.
list_invoice_quick_payments_jsonsList quick payments jsons for a invoice. API summary: Pobierz szybką płatność.
list_invoice_share_links_jsonsList share links jsons for a invoice. API summary: Pobierz link.
list_invoicesList sales invoices with number, client, amounts, status and payment state.
list_jsons_10List jsons. API summary: Pokaż szczegóły.
list_jsons_11List jsons. API summary: Sprawdź status przetwarzania.
list_jsons_12List jsons. API summary: Pobierz.
list_jsons_13List jsons. API summary: Sprawdzanie statusu przetwarzania.
list_jsons_14List jsons. API summary: Podgląd.
list_jsons_15List jsons. API summary: Sprawdź status przetwarzania.
list_jsons_16List jsons. API summary: Pokaż szczegóły.
list_jsons_17List jsons. API summary: Sprawdź status przetwarzania.
list_jsons_18List jsons. API summary: Pokaż szczegóły.
list_jsons_19List jsons. API summary: Sprawdź status przetwarzania.
list_jsons_2List jsons. API summary: Pokaż szczegóły załącznika.
list_jsons_20List jsons. API summary: Podgląd.
list_jsons_21List jsons. API summary: Sprawdź status przetwarzania.
list_jsons_22List jsons. API summary: Podgląd.
list_jsons_25List jsons. API summary: Pokaż jedną.
list_jsons_26List jsons. API summary: Pokaż szczegóły.
list_jsons_27List jsons. API summary: Pokaż jedno.
list_jsons_28List jsons. API summary: Pokaż jedno.
list_jsons_3List jsons. API summary: Sprawdź status przetwarzania.
list_jsons_30List jsons. API summary: Podgląd.
list_jsons_31List jsons. API summary: Pobierz szczegół.
list_jsons_32List jsons. API summary: Podgląd.
list_jsons_33List jsons. API summary: Pokaż szczegóły.
list_jsons_34List jsons. API summary: Pobierz szczegół.
list_jsons_35List jsons. API summary: Pobierz gotowe dokumenty.
list_jsons_5List jsons. API summary: Sprawdź status przetwarzania.
list_jsons_6List jsons. API summary: Pokaż szczegóły.
list_jsons_7List jsons. API summary: Sprawdź status przetwarzania.
list_jsons_8List jsons. API summary: Pokaż szczegóły.
list_jsons_9List jsons. API summary: Sprawdź status przetwarzania.
list_margin_invoices_jsonsList margin invoices jsons. API summary: Listuj.
list_moss_vat_rates_jsonsList moss vat rates jsons. API summary: Listuj.
list_next_number_jsons_10List next number jsons. API summary: Pobierz następny numeru utargu dziennego.
list_next_number_jsons_2List next number jsons. API summary: Pobierz następny numer.
list_next_number_jsons_3List next number jsons. API summary: Pobierz następny numer.
list_next_number_jsons_4List next number jsons. API summary: Pobierz następny numer.
list_next_number_jsons_5List next number jsons. API summary: Pobierz kolejny numer.
list_next_number_jsons_6List next number jsons. API summary: Pobieranie kolejnego numeru faktury.
list_next_number_jsons_7List next number jsons. API summary: Pobierz następny numer.
list_next_number_jsons_8List next number jsons. API summary: Pobierz następny numer.
list_next_number_jsons_9List next number jsons. API summary: Pobierz następny numer.
list_next_number_jsons_getList next number jsons. API summary: Pobierz nastepny numer.
list_oss_invoices_jsonsList oss invoices jsons. API summary: Listuj.
list_pdf_many_check_jsonsList check jsons for a pdf many. API summary: Sprawdź status.
list_productsList saved products and services with their net/gross prices and VAT rates.
list_saf_v7_files_jsonsList saf v7 files jsons. API summary: Listuj.
list_selected_jsonsList selected jsons. API summary: Listuj wybrane.
list_selected_jsons_2List selected jsons. API summary: Listuj wybrane.
list_selected_jsons_getList selected jsons. API summary: Listuj wybrane.
list_transaction_kinds_jsonsList transaction kinds jsons. API summary: Listuj.
list_vat_eu_taxes_jsonsList vat eu taxes jsons. API summary: Pobierz tablicę.
list_vat_exemptions_jsonsList vat exemptions jsons. API summary: Listuj wszystkie.
list_vat_ratesList the available VAT rates and their tax symbols for invoice lines.
mark_invoice_paidChanges dataMark an invoice (`invoice_uuid`) as paid.
send_aad18da0_5741_42a1_b205_4ee2933559ea_jsonVisible to othersSend a aad18da0 5741 42a1 b205 4ee2933559ea. Has effects visible outside this system. API summary: Wyślij fakturę.
send_aad18da0_5741_42a1_b205_4ee2933559ea_json_sendVisible to othersSend a aad18da0 5741 42a1 b205 4ee2933559ea. Has effects visible outside this system. API summary: Wyślij fakturę.
send_document_jsonVisible to othersSend a document. Has effects visible outside this system. API summary: Wyślij wiele faktur.
send_document_json_sendVisible to othersSend a document. Has effects visible outside this system. API summary: Wyślij wiele faktur.
send_invoice_by_emailVisible to othersEmail an invoice (`invoice_uuid`) to the client; set `recipient` to override the address and `locale` for language. Sends an email.
send_invoice_to_ksefVisible to othersSubmit an invoice (`invoice_uuid`) to the Polish National e-Invoice System (KSeF). This is an official tax filing and cannot be undone.
send_invoice_to_ksef_json_2Visible to othersSend a invoice (advance invoice uuid). Has effects visible outside this system. API summary: Wyślij do KSeF.
send_invoice_to_ksef_json_3Visible to othersSend a invoice (final invoice uuid). Has effects visible outside this system. API summary: Wyślij do KSeF.
send_invoice_to_ksef_json_postVisible to othersSend a invoice (margin invoice uuid). Has effects visible outside this system. API summary: Wyślij do KSeF.
send_invoice_to_ksef_json_sendVisible to othersSend a invoice (corrective invoice uuid). Has effects visible outside this system. API summary: Wyślij do KSeF.
submit_fiscal_reportVisible to othersMark as accounted json a fiscal report (fiscal report uuid). Has effects visible outside this system. API summary: Oznacz jako zaksięgowany.
submit_invoiceVisible to othersMark as accounted json a invoice (internal invoice uuid). Has effects visible outside this system. API summary: Oznacz jako zaksięgowana.
update_6e43c932_0d04_4cc3_af80_da807e8bbb71_jsonsVisible to othersUpdate an existing 6e43c932 0d04 4cc3 af80 da807e8bbb71 json. Has effects visible outside this system. API summary: Edytuj.
update_costs_file_name_many_jsonVisible to othersUpdate an existing cost. Has effects visible outside this system. API summary: Zmień nazwę pliku.
update_jsonsVisible to othersUpdate an existing json identified by json uuid. Has effects visible outside this system. API summary: Edytuj.
update_paid_many_jsonsVisible to othersUpdate an existing paid many json. Has effects visible outside this system. API summary: Oznacz jako zapłacony.
update_unpaid_many_jsonsVisible to othersUpdate an existing unpaid many json. Has effects visible outside this system. API summary: Oznacz jako niezapłacony.
upload_cost_jsonChanges dataUpload a cost. API summary: Dodaj plik.

Set up in three steps

1
Pick the app
Create a free HeyMyApps account and choose inFakt from the app list.
2
Paste your key
Paste an inFakt API key. In inFakt open Ustawienia > Inne opcje > API, create a key with the scopes you need, for example read and write for invoices and clients, and copy it.
3
Add the link to your AI
You get a personal MCP link. Add it to Claude, ChatGPT or Cursor:
1. Click your name, then Settings › Connectors › Add custom connector.
2. Paste your link as the Remote MCP server URL.
3. Switch it on from the + menu in a chat.

Questions

What can the AI do in inFakt?

The AI can read invoices, corrective invoices, clients, products, cost documents, VAT rates, bank accounts and your company details, and download invoice PDFs. It can create invoices, corrective invoices, clients and products, email invoices, mark them paid, make share links and submit invoices to KSeF. It can also delete an invoice if you switch that tool on.

Does the AI see my inFakt credentials?

No. Your inFakt API key and account details are encrypted at rest and never shown to the AI. After you save them, they are not shown again, not even to you. The AI only sees the results of the tools it calls.

Can I control what the AI is allowed to do?

Yes. You choose which tools are switched on, and the scopes on your inFakt API key limit it further. Emailing an invoice reaches your client, sending to KSeF is an official tax filing, and deleting an invoice is permanent. All three can require your approval before they run. Every tool call is logged.

Does it work with ChatGPT?

Yes. In ChatGPT go to Settings › Apps & Connectors › Advanced and turn on Developer mode, then add your HeyMyApps link. Developer mode needs a paid ChatGPT plan: Plus, Pro, Business or Enterprise. The same link also works in Claude (Settings › Connectors › Add custom connector), Cursor and other MCP clients.

What does it cost?

HeyMyApps has a free plan with no credit card required. Paid plans bill per completed task. You also need your own inFakt account.

Can the AI send invoices to KSeF?

Yes, if you switch that tool on. It can submit an existing invoice to KSeF, or submit a new invoice to KSeF when it creates it. A KSeF submission is an official tax filing and cannot be undone, so you may want to require approval. An invoice already in KSeF should be corrected with a corrective invoice, not deleted.