Skysay’s launch post positions agent-native telephony—real numbers, calls, SMS—as MCP tools described in llms.txt, with client recipes for Grok Bot and other assistants. Pattern for builders: expose billable / regulated actions as scoped MCP tools with read-only first, quotes before spend, and carrier-review gates per country.
Skysay’s hosted Streamable HTTP MCP (https://api.skysay.ai/mcp) lets Grok Bot check coverage, request numbers, place approved outbound calls through a hosted voice agent, and send SMS—OAuth/PKCE, separate call vs SMS approval, no local Twilio bridge. Start read-only with account_overview; outside US/CA/UK/MX outbound often needs carrier review first.
Sarvam AI hosts a remote HTTP MCP at https://mcp.sarvam.ai/voice-agents so Claude Code, Cursor, VS Code, and Claude Desktop can author voice agents, wire telephony, run outbound campaigns, manage knowledge bases, evals, boards, and analytics via natural language. OAuth SSO (24h token); nothing to install. Connect: `claude mcp add --transport http sarvam-voice-agents https://mcp.sarvam.ai/voice-agents`. Strong fit for Indian-language voice automation.