Exact Online

Exact Online is a Dutch cloud business software suite from Exact (Delft, NL) serving SMEs and accountants with accounting, ERP, invoicing, CRM, project management, and AI-driven automation, used by more than 675,000 companies. The platform exposes a comprehensive REST and OData API covering financial, HRM, logistics, CRM, and project data across regional deployments (start.exactonline.nl, .co.uk, .be, .de, .fr, .es, .com). Authentication is via OAuth 2.0 with regional authorization and token endpoints.

Exact Online publishes 7 API contracts indexed on the APIs.io network, including CRM API, Financial API, Logistics API, and 4 more. Tagged areas include Accounting, ERP, Invoicing, Business Software, and CRM.

The Exact Online catalog on APIs.io includes 1 Spectral governance ruleset.

Exact Online’s developer surface includes authentication, documentation, pricing, signup flow, engineering blog, and 10 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

32.6/100 thin ▬ flat Agent 24/100 agent aware Front door AI 4/6 moderate Heartbeat 98/100 alive saas Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →

AccessSelf serve

1 published contract

Accounting ERP Invoicing Business Software CRM Financial Software Small Business

What this lets a business do 3

Business capabilities this provider's published APIs can perform, derived from its own contracts. Browse all capabilities →

Financial Management

BC-200

Financial

GET /{division}/financial/GLAccounts

Procurement Management

BC-500

Purchase

GET /{division}/purchaseorder/PurchaseOrders POST /{division}/purchaseorder/PurchaseOrders

Customer Relationship Management

BC-420

CRM

GET /{division}/crm/Accounts POST /{division}/crm/Contacts

Kin Score

Kin Score How this is scored →
scored 2026-11-06 · rubric v0.27.0

Composite quality — 32.6/100 · thin

Contract Quality 8.0 / 19

Developer Ergonomics 4.7 / 15

Access Clarity 3.2 / 15

Operational Transparency 1.0 / 10

Contract Governance 1.2 / 9

Discoverability 5.0 / 8

Regulatory Posture 4.9 / 15

Create-or-Update Ergonomics 0.0 / 10

Agent readiness — 24/100 · agent aware

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

Documented Reversibility 0 / 6

MCP Server 0 / 12

Machine-Readable Auth 10 / 10

Idempotency 0 / 9

Stable Error Semantics 0 / 8

Request/Response Examples 0 / 7

Rate-Limit Signaling 0 / 7

Typed Event Surface 0 / 6

Agent Skills 0 / 5

Well-Known Catalog 0 / 4

Consent & Bot Identity 0 / 3

A2A Agent Card 0 / 8

Dry-Run / Simulate Mode 0 / 4

Delegated User Identity 6 / 6

Protected Resource Metadata 0 / 5

Registration Without a Human 0 / 6

Agentic Commerce Well-Known Document 0 / 5

Pagination 5 / 5

Distinct Operations 3 / 3

MCP Tool Quality 6 / 6

Regulatory Posture applies to this provider. Its tags matched the Horizontal (data, software, accessibility, platform) regime, so Regulatory Posture carries 15 points of the composite. If this regime is wrong for your business, say so on your provider repo — the applicability map is public and we will correct it.

Create-or-Update Ergonomics applies to this provider. This API accepts writes, so it carries 10 points of the composite. It is scored from the published contracts themselves: whether a caller can create-or-update in one call, whether the write accepts a key the caller already holds, and whether the response says which branch ran. Without that, every write needs a search-and-branch in front of it, and the first time that check is skipped a duplicate record is created. Scored against the observed mean rather than raw — a provider at the catalog average is unchanged by this facet, not penalised by it.

The six quality facets above are damped to 75 points between them, because the conditional facet above carries the other 25. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 75% of its nominal weight, not 100%. The full arithmetic is at apis.io/rating/.

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Agent readiness — checks not met, largest first (exact, from this profile):

MCP Server +12 pts — deployment.mode + probe verdict on the mcp/ manifest, not the pointer; an unprobed slug falls back to authorship
Idempotency +9 pts — OpenAPI mutating operations declare an idempotency key — a header, a request-body property, or a named de-duplication token whose own description says so (verified); else common[].type matches /idempoten/i (documented)
Stable Error Semantics +8 pts — OpenAPI $refs a shared error schema across 4xx/5xx responses (verified), else common[].type includes ErrorCatalog / ErrorCodes / DeclineCodes
A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0
Rate-Limit Signaling +7 pts — OpenAPI responses document X-RateLimit-* / RateLimit headers (verified), else a rate_limits artifact or RateLimits link (documented)
Request/Response Examples +7 pts — share of operations carrying request/response examples; else an Examples / Code Samples link

9 more unmet checks in the Agent Readiness table above.

Kin Score — facets with the most composite points still available (weight × headroom):

Access Clarity scores 21.1 — up to +15.8 composite points
Contract Quality scores 42.9 — up to +14.3 composite points
Developer Ergonomics scores 31.0 — up to +13.8 composite points

Each check links to what satisfies it. Publish the artifact, or tell us where it already lives, and the score moves on the next scoring run.

Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. Every facet and dimension name above is a link: it opens that measurement's own page — what it means, the exact checks that feed it, how the whole catalog distributes on it, and the providers at the top of it. This rating is computed from the provider profile at artifacts.apis.io/exact-online/apis.yml: open an issue on github.com/api-evangelist/exact-online to ask a question or point us at an artifact you publish. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

Standards implemented 2

Standards this provider implements or carries. De facto ones are profiled and measured by the API Commons; formal ones come from the standards directory and are linked by the provider's own tags. The evidence column says how each claim was established — not that it was made.

OpenAPI

measured — observed by APIs.io (published)

OAuth 2.0

measured — observed by APIs.io (declared)

APIs 7

Individual APIs this provider publishes, each with its own machine-readable definition.

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; applicati...

Exact Online CRM API

The CRM API from Exact Online — 4 operation(s) for crm.

Exact Online Financial API

The Financial API from Exact Online — 1 operation(s) for financial.

Exact Online Logistics API

The Logistics API from Exact Online — 1 operation(s) for logistics.

Exact Online Purchase API

The Purchase API from Exact Online — 1 operation(s) for purchase.

Exact Online Sales API

The Sales API from Exact Online — 3 operation(s) for sales.

Exact Online System API

The System API from Exact Online — 3 operation(s) for system.

Scroll for all 7

Open Collections 7

Open, tool-agnostic API collections (OpenAPI-derived and Bruno).

Exact Online REST / OData CRM API

OPEN COLLECTION

Exact Online REST / OData CRM Financial API

OPEN COLLECTION

Exact Online REST / OData CRM Logistics API

OPEN COLLECTION

Exact Online REST / OData CRM Purchase API

OPEN COLLECTION

Exact Online REST / OData CRM Sales API

OPEN COLLECTION

Exact Online REST / OData CRM System API

OPEN COLLECTION

Exact Online REST / OData API

OPEN COLLECTION

Scroll for all 7

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

Exact Online API Rules

56 rules · 54 errors 1 warnings 1 info

SPECTRAL

Security Posture 4

Authentication, domain security, vulnerability disclosure, and trust-center signals.

Exact Online Authentication

oauth2 · 1 scheme

SECURITY

Exact Online Domain Security

TLSv1.3 · HSTS · DNSSEC · DMARC

SECURITY

Exact Online Vulnerability Disclosure

Intigriti · security.txt · contact published

SECURITY

Exact Online Trust Center

GDPR

SECURITY

Scopes 1

OAuth scopes governing access to this provider's APIs.

Exact Online Scopes

OAuth 2.0 · no documented scopes

0 scopes

SCOPES

Agentic Access 1

Recommended x-agentic-access execution contracts for AI agents.

Exact Online Agentic Access

26 operations · 13 acting

AGENTIC

Resources

Get Started 1

Portal, sign-up, and the first successful call

Signup

Signup

Documentation 2

Reference material describing how the API behaves

Documentation

Documentation

API Documentation

API Documentation

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess

AgenticAccess

Access & Security 5

Authentication, authorization, and security posture

TrustCenter

TrustCenter

VulnerabilityDisclosure

VulnerabilityDisclosure

DomainSecurity

DomainSecurity

Authentication

Authentication

OAuthScopes

OAuthScopes

Commercial 1

Pricing, plans, and the legal terms of use

Pricing

Pricing

Company 3

The organization behind the API

LinkedIn

Website

Website

Blog

Blog

Other 2

Properties that don't map to a standard resource type

CapabilityMap

CapabilityMap

App Center

App Center

Source (apis.yml)

aid: exact-online
name: Exact Online
description: Exact Online is a Dutch cloud business software suite from Exact (Delft, NL) serving SMEs and accountants with
  accounting, ERP, invoicing, CRM, project management, and AI-driven automation, used by more than 675,000 companies. The
  platform exposes a comprehensive REST and OData API covering financial, HRM, logistics, CRM, and project data across regional
  deployments (start.exactonline.nl, .co.uk, .be, .de, .fr, .es, .com). Authentication is via OAuth 2.0 with regional authorization
  and token endpoints.
type: Index
deliveryModel:
  model: saas
  open_source: false
  commercial: true
  callable_host: true
  label: Hosted service · you call their endpoint
  confidence: high
  source:
  - openapi
  - pricing
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: unknown
  onboarding: self-serve
  trial: false
  try_now: false
  public: false
  gated: none
  gated_source:
  - onboarding
  label: Self-serve signup
  confidence: low
  source:
  - authentication
  - security
  generated: '2026-11-06'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/exact-online.png
tags:
- Accounting
- ERP
- Invoicing
- Business Software
- CRM
- Financial Software
- Small Business
tags_raw:
- Accounting
- ERP
- Invoicing
- Business Software
- CRM
- Financial Software
- SME
url: https://raw.githubusercontent.com/api-evangelist/exact-online/refs/heads/main/apis.yml
created: '2026-05-11'
modified: '2026-05-11'
specificationVersion: '0.23'
apis:
- 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
  - Finance
  tags_raw:
  - 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
- aid: exact-online:exact-online-crm-api
  name: Exact Online CRM API
  description: The CRM API from Exact Online — 4 operation(s) for crm.
  humanURL: https://start.exactonline.nl/docs/HlpRestAPIResources.aspx
  baseURL: https://start.exactonline.nl/api/v1
  tags:
  - CRM
  properties:
  - type: OpenAPI
    url: openapi/exact-online-crm-api-openapi.yml
- aid: exact-online:exact-online-financial-api
  name: Exact Online Financial API
  description: The Financial API from Exact Online — 1 operation(s) for financial.
  humanURL: https://start.exactonline.nl/docs/HlpRestAPIResources.aspx
  baseURL: https://start.exactonline.nl/api/v1
  tags:
  - Finance
  tags_raw:
  - Financial
  properties:
  - type: OpenAPI
    url: openapi/exact-online-financial-api-openapi.yml
- aid: exact-online:exact-online-logistics-api
  name: Exact Online Logistics API
  description: The Logistics API from Exact Online — 1 operation(s) for logistics.
  humanURL: https://start.exactonline.nl/docs/HlpRestAPIResources.aspx
  baseURL: https://start.exactonline.nl/api/v1
  tags:
  - Logistics
  properties:
  - type: OpenAPI
    url: openapi/exact-online-logistics-api-openapi.yml
- aid: exact-online:exact-online-purchase-api
  name: Exact Online Purchase API
  description: The Purchase API from Exact Online — 1 operation(s) for purchase.
  humanURL: https://start.exactonline.nl/docs/HlpRestAPIResources.aspx
  baseURL: https://start.exactonline.nl/api/v1
  tags:
  - Purchase
  properties:
  - type: OpenAPI
    url: openapi/exact-online-purchase-api-openapi.yml
- aid: exact-online:exact-online-sales-api
  name: Exact Online Sales API
  description: The Sales API from Exact Online — 3 operation(s) for sales.
  humanURL: https://start.exactonline.nl/docs/HlpRestAPIResources.aspx
  baseURL: https://start.exactonline.nl/api/v1
  tags:
  - Sales
  properties:
  - type: OpenAPI
    url: openapi/exact-online-sales-api-openapi.yml
- aid: exact-online:exact-online-system-api
  name: Exact Online System API
  description: The System API from Exact Online — 3 operation(s) for system.
  humanURL: https://start.exactonline.nl/docs/HlpRestAPIResources.aspx
  baseURL: https://start.exactonline.nl/api/v1
  tags:
  - System
  properties:
  - type: OpenAPI
    url: openapi/exact-online-system-api-openapi.yml
common:
- type: CapabilityMap
  url: capabilities/exact-online-capability-edges.yml
  name: Exact Online Business Capability Map
- type: AgenticAccess
  url: agentic-access/exact-online-agentic-access.yml
- type: TrustCenter
  url: security/exact-online-trust-center.yml
- type: VulnerabilityDisclosure
  url: security/exact-online-vulnerability-disclosure.yml
- type: DomainSecurity
  url: security/exact-online-domain-security.yml
- type: Authentication
  url: authentication/exact-online-authentication.yml
- type: OAuthScopes
  url: scopes/exact-online-scopes.yml
- type: LinkedIn
  url: https://www.linkedin.com/company/exact
- type: Website
  url: https://www.exact.com
- type: Documentation
  url: https://support.exactonline.com/community/s/knowledge-base
- type: API Documentation
  url: https://start.exactonline.nl/docs/HlpRestAPIResources.aspx
- type: Pricing
  url: https://www.exact.com/nl/software/prijs
- type: Signup
  url: https://www.exact.com/nl/probeer-gratis
- type: App Center
  url: https://apps.exactonline.com
- type: Blog
  url: https://www.exact.com/nl/blog?format=feed&type=rss
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com

Exact Online API — frequently asked questions

Does Exact Online have an API?

Yes. APIs.io lists 7 APIs from Exact Online, including Exact Online REST / OData API, Exact Online CRM API and Exact Online Financial API, and 4 more.

Is there an OpenAPI specification for the Exact Online API?

Yes. APIs.io indexes 6 OpenAPI specifications for Exact Online, each linked for download from this page.

How do I authenticate with the Exact Online API?

Exact Online documents its authentication (oauth2 · 1 scheme). The details are profiled on APIs.io as Exact Online Authentication.

Is the Exact Online API ready for AI agents?

Exact Online has a Kin Score of 32.6 out of 100 (thin) and an Agent Readiness score of 23.9 (agent-aware), scored by API Evangelist on 2026-11-06.

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