> For the complete documentation index, see [llms.txt](https://help.simplephones.ai/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://help.simplephones.ai/developers.md).

# Developers

- [Authentication](https://help.simplephones.ai/developers/authentication.md)
- [List of Numbers](https://help.simplephones.ai/developers/list-of-numbers.md)
- [List of Calls](https://help.simplephones.ai/developers/list-of-calls.md)
- [Call Details & Transcript](https://help.simplephones.ai/developers/call-details-and-transcript.md)
- [Outbound Call](https://help.simplephones.ai/developers/outbound-call.md)