> For the complete documentation index, see [llms.txt](https://attivio.gitbook.io/sdk/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://attivio.gitbook.io/sdk/release-5.5/undefined.md).

# Attivio Platform SDK 5.5

## Attivio Modules

Attivio modules allow custom code (for example ingestion or query transformers) to be added to your Attivio projects.

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[Module SDK](/sdk/release-5.5/module-sdk.md)
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[Public site for SDK javadoc](https://attivio.github.io/sdk-5.5-javadoc/index.html)

## Attivio Service Factory

The Attivio Service Factory allows SDK users to access a set of Attivio services, or create custom services, that run on a node process.

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[Service Factory](/sdk/release-5.5/service-factory.md)
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[Creating a Custom Service](/sdk/release-5.5/service-factory/custom-service-creating.md)
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[Testing with the ServiceFactory](/sdk/release-5.5/service-factory/custom-service-testing.md)
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## Other guides

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[Custom Executables](/sdk/release-5.5/custom-executables.md)
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