communications

Hail is a communications MCP server for AI agents, giving them a phone number, SMS line, and email inbox through one endpoint. It supports inbound and outbound voice, text, and email, with managed cloud and open-source self-hosting options.

OP is an API that gives AI agents real phone numbers for account registration, OTP/2FA codes, SMS, and voice calls. The page shows a live product pitch, feature comparison, a simple API example, and multiple agent communication use cases.