Exact Online REST / OData API

REST and OData API (v1) for Exact Online covering financials, sales, purchasing, inventory, HRM, CRM, project management, and master data. Authentication is OAuth 2.0; applications register in the Exact App Center and use regional auth/token endpoints (e.g. start.exactonline.nl for the Netherlands, start.exactonline.co.uk for the UK).

Work with this as data

Every API here is available over the APIs.io API and to AI agents over MCP.

MCP server

One button, every client — Claude, Cursor, VS Code and the rest.

https://apis.io/mcp

Tools for apis

7 MCP tools reach this
  • find_apisBrowse and filter every API in the catalog.
  • get_api_artifactsOne API's artifacts, grouped by type.
  • get_openapiThe primary OpenAPI for this API.
  • find_similar_apisAPIs that look like this one.
  • apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.
  • resolveTurn a domain, URL or GitHub org into the provider it belongs to.
  • find_cohortsEvery scored population of providers in the catalog.
All 92 tools

Call it yourself

curl for this page
This API
curl "https://apis.io/api/v1/apis/rest-api"
All apis
curl "https://apis.io/api/v1/apis?limit=25"

Discovery needs no key. Ratings and market analysis are Pro.

Get an API key

Free tier, no email required.

A second provider on the same verified email joins the account you already have.

API entry from apis.yml

apis.yml Raw ↑
aid: exact-online:rest-api
name: Exact Online REST / OData API
description: REST and OData API (v1) for Exact Online covering financials, sales, purchasing, inventory,
  HRM, CRM, project management, and master data. Authentication is OAuth 2.0; applications register in
  the Exact App Center and use regional auth/token endpoints (e.g. start.exactonline.nl for the Netherlands,
  start.exactonline.co.uk for the UK).
humanURL: https://start.exactonline.nl/docs/HlpRestAPIResources.aspx
baseURL: https://start.exactonline.nl/api/v1
tags:
- Accounting
- ERP
- Invoicing
- Financial
properties:
- type: Documentation
  url: https://start.exactonline.nl/docs/HlpRestAPIResources.aspx
- type: Reference
  url: https://support.exactonline.com/community/s/article/All-All-DNO-Content-restrefdocs
- type: Introduction
  url: https://support.exactonline.com/community/s/article/All-All-DNO-Content-restintro
- type: OAuth Authorization Endpoint
  url: https://start.exactonline.nl/api/oauth2/auth
- type: OAuth Token Endpoint
  url: https://start.exactonline.nl/api/oauth2/token
- type: Sample Code
  url: https://support.exactonline.com/community/s/article/All-All-DNO-Content-restsamplecode