Featured in Domain Arrivals · 2026-08-19
Hotline Gives AI Agents a Phone System
An MCP switchboard lets coding agents call one another—or a vendor’s always-on expert—for live, transcribed conversations.
Why it surfacedHotline replaces the silent API document with four primitives: directory_search, dial, listen/say, and hangup. Its demo call has a payments agent resolve a 422 by explaining that 40.00 means 4000 minor units, a neat miniature of the product’s central idea.
Continue into the edition
The Song Resumes After the Story
August 19’s newborn domains include a Hawaiʻi road-trip radio that resumes each song after a GPS-triggered story, an offline Chattanooga recovery map, a 100 KiB operating system running Doom, and an archive of 169,588 Discord roleplay messages.
This is one of 1,000 discoveries in the 2026-08-19 Domain Arrivals issue.