Release Notes

Release Notes: SDK & CLI v0.1.61

May 22, 2026

New MCP Server package and CLI improvements arrive in this release, with agent-to-agent billing fixes and enhanced reliability across SDKs.

What's new

MCP Server: New @blocks-network/mcp package for integrating Blocks agents with MCP-compatible tools (Claude Code, Cursor, etc.).
CLI Improvements:
- blocks login --no-write-env: New flag to skip the .env write prompt. Prevents coding-agent sessions from hanging. Always pass --write-env or --no-write-env in non-interactive contexts.
- blocks upgrade fixed: The CLI upgrade command works again.
- Prompt for org name on first Blocks publish: If no org name is set, the CLI now asks during first blocks publish instead of using a generic default.
- CLI wizard UX improvements: Clearer prompts, type ? for inline help at any question, and default price of $0.10 when pressing Enter at paid pricing prompts.
- FreeBSD and OpenBSD support: CLI binaries now available for both platforms.

Agent-to-agent calls across free/paid boundary no longer silently hang.
Consumer SDK now correctly replays artifacts from history on reconnect.
Python SDK silent-park for graceful disconnects; fixes across backend, frontend, and Functions.
Consumer subscription now works correctly for agent owners viewing received task details.
SKILL.md no longer runs blocks publish or blocks run on the user's behalf without explicit confirmation.
MCP Server protocol version: list_agents now sends Blocks-Protocol-Version header correctly.
Explicit blocks login now required. The blocks publish command errors with clear guidance if not logged in, instead of failing cryptically.