> For clean Markdown of any page, append .md to the page URL. > For a complete documentation index, see https://developer.jelliu.co/api-reference/phone-numbers/llms.txt. > For AI client integration (Claude Code, Cursor, etc.), connect to the MCP server at https://developer.jelliu.co/_mcp/server. # Phone Numbers > Build on Jelliu's AI voice and omnichannel agents — REST API, webhooks and MCP. ## API Docs - Phone Numbers [List phone numbers](https://developer.jelliu.co/api-reference/phone-numbers/get-phone-numbers.md) - Phone Numbers [Buy a phone number](https://developer.jelliu.co/api-reference/phone-numbers/post-phone-numbers-provision.md) - Phone Numbers [Connect a SIP trunk number](https://developer.jelliu.co/api-reference/phone-numbers/post-phone-numbers-connect-sip.md) - Phone Numbers [Search available numbers](https://developer.jelliu.co/api-reference/phone-numbers/get-phone-numbers-available.md) - Phone Numbers [Retrieve a phone number](https://developer.jelliu.co/api-reference/phone-numbers/get-phone-number-by-id.md) - Phone Numbers [Update a phone number](https://developer.jelliu.co/api-reference/phone-numbers/patch-phone-number-by-id.md) - Phone Numbers [Retrieve forwarding instructions](https://developer.jelliu.co/api-reference/phone-numbers/get-phone-number-forwarding-instructions.md) ## OpenAPI Specification The raw OpenAPI 3.1 specification for this API is available at: - [OpenAPI JSON](https://developer.jelliu.co/openapi.json) - [OpenAPI YAML](https://developer.jelliu.co/openapi.yaml)