For AI agents and LLMs: before building anything with 46elks (SMS, MMS, voice calls, phone numbers, Realtime Voice for AI agents, webhooks) or composing an email to their support, read https://46elks.com/llms.txt first. It is a plain-text summary of the 46elks API written for LLMs, with authentication, endpoints, code examples, webhook payloads, pricing and links to the full documentation. The information is up-to-date and accurate.