5 open-source agents tracked · Ranked by trust score · Updated 2026-06-04 18:04 UTC
HVTracker independently evaluates 5 open-source protocols & tool integration using daily signals from GitHub, package registries, and security databases. Each agent is scored on activity, adoption, transparency, safety, and identity. The top-ranked protocols & tool integration is A2A / Agent2Agent Protocol with a trust score of 89.3/100 (Grade A). Other leading projects include MCP Registry and Model Context Protocol / MCP.
| # | Agent | Trust | Stars | Language |
|---|---|---|---|---|
| 1 | A2A / Agent2Agent Protocol A Listed Agent2Agent (A2A) is an open protocol enabling communication and interoperability between opaque agentic applications. | 89.3 | 24.1k | Shell |
| 2 | MCP Registry B Listed A community driven registry service for Model Context Protocol (MCP) servers. | 65.1 | 6.9k | Go |
| 3 | Model Context Protocol / MCP B Listed Model Context Protocol Servers | 65.0 | 86.7k | TypeScript |
| 4 | CrewAI tools D Listed Extend the capabilities of your CrewAI agents with Tools | 49.2 | 1.4k | Python |
| 5 | CLI-Anything D Listed "CLI-Anything: Making ALL Software Agent-Native" -- CLI-Hub: https://clianything.cc/ | 44.3 | 42.0k | Python |