- Category
- Developer Tools
- Rank
- No. 2234Tools index
- Type
- TOOL
- GitHub
- 152 stars
- Latest release
- v1.5.5
- Date
About
Busbar is a self-hosted execution control plane that governs what AI agents can do before they act: it sits in front of model requests, MCP tool calls, A2A delegations, and downstream actions to control where an agent can go, what it may use, what authority it receives, what it may cost, and what evidence is retained. It supports six native LLM protocols in and out, letting teams enforce these boundaries without leaving their existing protocols.
Why it made the leaderboard
Busbar sits in front of every model call, MCP tool call, and agent-to-agent delegation to enforce policy on scope, cost, and evidence retention before anything executes, filling a governance gap most agent stacks currently leave open.
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Editorially curated, with community endorsements as a secondary signal. Corrections welcome.