The most compatible MCP CLI client: tools, resources, prompts, completions, async tasks, skills, and notifications over stdio and Streamable HTTP (MCP 2026-07-28 and 2025-11-25). Persistent sessions, OAuth 2.1 with DCR, CIMD, client credentials, and ID-JAG, OS keychain, --json for code mode, grep across servers, proxy for AI sandboxes, x402 & more.
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Updated
Oct 6, 2026 - TypeScript