SnelStart API

14 endpoints for SnelStart, each at its own method and path, called with your API key. Open an endpoint for its inputs, examples and response.

Base URL: https://cotlet.dev/api/v1/snelstart
Connects with: Your own SnelStart Web login (web.snelstart.nl); the package you have decides which tools work, for example inStap or higher for sales invoices and customers
Integration page: SnelStart

Read (6)

Return data and change nothing in the account.

SnelStart Endpoints: Read
Endpoint	Description
GET /customers	Lists customers (Relaties, Klanten) with name, VAT number and email address.
GET /articles/search	Finds articles by name so an invoice line can use them.
GET /sales-invoices	Lists sales invoices from the invoice overview, filtered by status.
GET /invoices/{invoice_id}/sales-invoice	Returns one sales invoice with its lines, VAT mode and customer email.
GET /purchases	Lists purchase invoices and receipts from Inkopen, optionally only unprocessed ones.
GET /ledger-accounts	Lists ledger accounts (grootboekrekeningen) with code and name.

Change the account. Calls marked Confirm wait for the user to approve them.

SnelStart Endpoints: Write
Endpoint	Description
POST /customers	Adds a customer under Relaties, Klanten.
POST /customers/{customer_id}/sales-invoices	Saves a sales invoice as a concept, without sending it.
POST /invoices/{invoice_id}/sales-invoices Confirm	Emails a concept invoice to the customer or saves it without sending.
POST /invoices/{invoice_id}/credit-invoices Confirm	Credits a sales invoice in full or in part, as Crediteren does.
POST /invoices/{invoice_id}/reminder Confirm	Emails the customer that an invoice is still open and attaches the invoice again.
POST /invoices/{invoice_id}/payments Confirm	Registers a purchase or sales invoice as paid in a bank or cash journal.
POST /purchase-documents	Uploads one PDF, UBL, PNG or JPG file to Inkopen for SnelStart to read.
POST /memorial-entries Confirm	Books a memorial entry (memoriaalboeking) with debit and credit lines.