---
title: "BC API Pages: Standard vs Custom"
description: "BC API Pages: Standard vs Custom"
keywords: "BC API Pages: Standard vs Custom Integration"
url: "https://myrapidi.com/wiki/bc_api_pages_standard_vs_custom"
locale: "en"
published: "2026-03-26T15:46:24Z"
modified: "2026-03-26T15:46:25Z"
---

Business Central has two types of API pages:

- Standard API pages are built and maintained by Microsoft, and they come ready to use out of the box - no development required;
- Custom API pages are AL extensions built by a developer - either by your BC partner or internally. They let you expose exactly the fields you need, including data from extension tables, calculated values,etc.

**The Two URL Structures**

Standard Microsoft API:

```
https://api.businesscentral.dynamics.com/v2.0/{tenantId}/{environment}/api/v2.0/companies({companyGuid})/{entitySetName}
```

Example: _https://api.businesscentral.dynamics.com/v2.0/9efb0c96-7560-4413-85b2-e931f9c1fd2d/CRONUS\_DEMO/api/v2.0/companies(927fd0e5-c22f-ee11-bdfe-6045bde9b7c2)/customers_  
  
Custom API:

```
https://api.businesscentral.dynamics.com/v2.0/{tenantId}/{environment}/api/{publisher}/{group}/{version}/companies({companyGuid})/{entitySetName}
```

Example: _https://api.businesscentral.dynamics.com/v2.0/9efb0c96-7560-4413-85b2-e931f9c1fd2d/CRONUS\_DEMO/api/Rapidi/Integration/v2.0/companies(927fd0e5-c22f-ee11-bdfe-6045bde9b7c2)/customerFinancialSummaries_  
  
The difference is those three extra segments in the custom URL: `{publisher}`, `{group}`, and `{version}`. These map directly to properties defined in the AL page object.

**Case sensitivity:** BC API URLs are case-sensitive, and the entity set name must be lowercase. A single capital letter will return a 404 — worth double-checking before you spend an hour debugging a connection.