JUMP TOGetting StartedIntroductionPaginationErrorsWebhooksOverviewEventsCore ResourcesApp InstallsList App InstallsgetApp ConnectionsList App ConnectionsgetCreate App ConnectionpostClientsCreate ClientpostRetrieve ClientgetUpdate ClientpatchDelete ClientdeleteList ClientsgetCompaniesCreate CompanypostRetrieve CompanygetUpdate CompanypatchDelete CompanydeleteList CompaniesgetContractsSend ContractpostRetrieve ContractgetList ContractsgetContract TemplatesRetrieve Contract TemplategetList Contract TemplatesgetCustom FieldsList Custom FieldsgetCustom Field OptionsList Custom Field OptionsgetFilesCreate FilepostRetrieve FilegetList FilesgetFile ChannelsCreate File ChannelpostRetrieve File ChannelgetList File ChannelsgetFormsRetrieve FormgetList FormsgetForm ResponsesRequest Form ResponsepostList Form ResponsesgetInternal UsersRetrieve Internal UsergetList Internal UsersgetInvoicesRetrieve InvoicegetList InvoicesgetMessagesSend MessagepostList MessagesgetMessage ChannelsCreate Message ChannelpostRetrieve Message ChannelgetList Message ChannelsgetNotificationsList NotificationsgetCreate NotificationpostDelete NotificationdeleteMark Notification ReadpostMark Notification UnreadpostWorkspacesRetrieve WorkspacegetRetrieve Invoiceget https://api.copilot.com/v1/invoices/{id}