curl -H "X-inFakt-ApiKey: XXX_APIKEY_XXX" \
-H "Content-Type: application/json" \
-X POST \
-d '{"invoice": {"currency": "PLN", "paid_price": "1330", "kind": "vat", "payment_method": "transfer", "notes": "Zamówienie #930", "client_company_name": "firma najlepsza", "client_street": "Kaiserebersorferstr 79/10/2", "client_city": "Wieden", "client_post_code": "11-101", "client_country": "AT", "recipient_signature": "Piotr Ostrowski", "seller_signature": "ja", "invoice_date": "2018-06-25", "sale_date": "2018-06-25", "invoice_date_kind": "sale_date", "payment_date": "2018-06-25", "check_duplicate_number": false, "services": [{"name": "klasa A", "unit": "szt", "quantity": "1", "tax_symbol": "23", "gross_price": "100"}, {"name": "Płaska Stawka", "unit": "szt", "quantity": "1", "net_price": "1000", "tax_symbol": "23"}], "bank_name": "BRE Bank", "bank_account": "13 1140 1179 3195 0532 6725 8505", "swift": "", "sale_type": "service"}}' \
https://api.infakt.pl/v3/invoices.json
{"html5":"htmlmixed","css":"css","javascript":"javascript","php":"php","python":"python","ruby":"ruby","lua":"text\/x-lua","bash":"text\/x-sh","go":"go","c":"text\/x-csrc","cpp":"text\/x-c++src","diff":"diff","latex":"stex","sql":"sql","xml":"xml","apl":"apl","asterisk":"asterisk","c_loadrunner":"text\/x-csrc","c_mac":"text\/x-csrc","coffeescript":"text\/x-coffeescript","csharp":"text\/x-csharp","d":"d","ecmascript":"javascript","erlang":"erlang","groovy":"text\/x-groovy","haskell":"text\/x-haskell","haxe":"text\/x-haxe","html4strict":"htmlmixed","java":"text\/x-java","java5":"text\/x-java","jquery":"javascript","mirc":"mirc","mysql":"sql","ocaml":"text\/x-ocaml","pascal":"text\/x-pascal","perl":"perl","perl6":"perl","plsql":"sql","properties":"text\/x-properties","q":"text\/x-q","scala":"scala","scheme":"text\/x-scheme","tcl":"text\/x-tcl","vb":"text\/x-vb","verilog":"text\/x-verilog","yaml":"text\/x-yaml","z80":"text\/x-z80"}