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# Calling external services

> Learn section Development > Programming in the AL language > Calling external services: 8 Microsoft Learn pages. Index of what Learn documents here, linked to Learn.

Path: [Development](../../development.md) > [Programming in the AL language](../programming-in-the-al-language.md) > Calling external services · tier official · system development · no narrative yet

## Learn pages

- [Azure Function Integration Telemetry](https://learn.microsoft.com/dynamics365/business-central/dev-itpro/administration/telemetry-azure-function-integration-trace): Learn about telemetry on Azure Function integrations with Business Central
- [Call external services with the HttpClient data type](https://learn.microsoft.com/dynamics365/business-central/dev-itpro/developer/devenv-httpclient): Learn about how to call external services using the HttpClient datatype.
- [HttpClient data type](https://learn.microsoft.com/dynamics365/business-central/dev-itpro/developer/methods-auto/httpclient/httpclient-data-type): Provides a data type for sending HTTP requests and receiving HTTP responses from a resource identified by a URI.
- [HttpClientHandler attribute](https://learn.microsoft.com/dynamics365/business-central/dev-itpro/developer/attributes/devenv-httpclienthandler-attribute): Specifies that the method is an HttpClientHandler method, which catches and handles HTTP requests in test executions.
- [Mock outbound HttpClient web service calls during testing](https://learn.microsoft.com/dynamics365/business-central/dev-itpro/developer/devenv-httpclient-mock-outbound-calls): Learn about how to test HttpClient web calls to external services without invoking the live/actual/remote service.
- [Outgoing Web Service Request Trace](https://learn.microsoft.com/dynamics365/business-central/dev-itpro/administration/telemetry-webservices-outgoing-trace): Learn about the outgoing web service request telemetry in Business Central
- [Supported cipher suites](https://learn.microsoft.com/dynamics365/business-central/dev-itpro/developer/devenv-supported-cipher-suites): Lists the cipher suites that are supported for external APIs called from Business Central.
- [Troubleshooting web service errors (OData, API, and SOAP)](https://learn.microsoft.com/dynamics365/business-central/dev-itpro/webservices/web-service-troubleshooting): Learn about how to troubleshoot Business Central web service errors (OData, API, and SOAP).

## Videos, posts and code changes

Linked by a Haiku matcher with a grounding quote from the item's summary (link/topics.ts); machine-generated.

- [#11612 Multiple runs of email retrieval on the same emails don't persist again](../../../../changes/bcapps/11612.md) (code change): "Email retrieval no longer creates duplicate entries when the same emails are retrieved"
- [#11745 Bug 648781: check the party identifier that the PEPPOL export will use](../../../../changes/bcapps/11745.md) (code change): "PEPPOL validation now uses the same party identifier provider as export"
- [#11993 Enable HTTP requests before Expense Agent setup](../../../../changes/bcapps/11993.md) (code change): "The setup wizard enables HTTP client requests for the Expense Agent extension"
- [#12140 [Email - SMTP Connector] Fix OAuth Base64URL token parsing](../../../../changes/bcapps/12140.md) (code change): "OAuth2 SMTP authentication now correctly decodes Base64URL tokens"
- [#5833 Add Microsoft Graph API Support to SharePoint Connector](../../../../changes/bcapps/5833.md) (code change): "SharePoint Connector now supports Microsoft Graph API as an alternative to REST API"
- [#8499 Adding `IsVerifiedDomain` to the `AzureADTenant` module](../../../../changes/bcapps/8499.md) (code change): "checks whether a domain is among the tenant's verified domains"
- [#9744 [Email - Outlook REST API] Skip attachments without contentBytes in RetrieveEmails](../../../../changes/bcapps/9744.md) (code change): "Attachments without contentBytes (item and reference attachments) are now skipped"
- [#9748 Image Analyzer: use Computer Vision v3.2 instead of retiring v1.0](../../../../changes/bcapps/9748.md) (code change): "The Image Analyzer app switches from the retiring Computer Vision v1.0 to v3.2 API"
- [How to Use External APIs in Business Central](../../../../posts/aardvarklabs-blog/2953.md) (community post): "how to consume external APIs from within Business Central by making HTTP requests using the HttpClient data type"
- [Native SFTP Support in Business Central 28](../../../../posts/aardvarklabs-blog/3460.md) (community post): "Native SFTP Support in Business Central 28"
- [Dynamics 365 Business Central: using SFTP from AL (the native way)](../../../../posts/demiliani-com/13640.md) (community post): "AL code can talk directly to SFTP servers"
- [OAuth library for the Rest Client](../../../../posts/kauffmann-nl/8332.md) (community post): "OAuth library for Business Central's Rest Client module has been released"
- [What's Cooking in Business Central: Cookies and Collectible Errors in the REST Client](../../../../videos/qNHUj3ZEang.md) (video): "REST client; cookies; exception handling; collectible errors"

Source: Microsoft Learn (CC BY 4.0). Descriptions are Learn's own.