4 open-source agents tracked · Ranked by trust score · Updated 2026-05-30 20:03 UTC
HVTracker independently evaluates 4 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 87.5/100 (Grade B). Other leading projects include MCP Registry and Model Context Protocol / MCP.
| # | Agent | Trust | Stars | Language |
|---|---|---|---|---|
| 1 | A2A / Agent2Agent Protocol B Agent2Agent (A2A) is an open protocol enabling communication and interoperability between opaque agentic applications. | 87.5 | 24.1k | Shell |
| 2 | MCP Registry C A community driven registry service for Model Context Protocol (MCP) servers. | 67.1 | 6.9k | Go |
| 3 | Model Context Protocol / MCP C Model Context Protocol Servers | 64.7 | 86.5k | TypeScript |
| 4 | CrewAI tools B Extend the capabilities of your CrewAI agents with Tools | 46.5 | 1.4k | Python |