HVTracker › Protocols & Tool Integration › A2A / Agent2Agent Protocol vs MCP Registry

A2A / Agent2Agent Protocol vs MCP Registry

An independent, evidence-weighted trust comparison of two protocols & tool integration — ranked on verifiable signals, not popularity.

A2A / Agent2Agent Protocol ranks higher with an HVTrust score of 87.5 vs 67.1/100 (Grade B vs C). HVTrust reflects supply-chain safety, transparency, maintenance, and adoption — weighted by how much verifiable evidence exists.
SignalA2A / Agent2Agent ProtocolMCP Registry
HVTrust score87.567.1
Evidence gradeBC
Safety / Integrity (30)25.115.8
Transparency (20)16.816.5
Maintenance (20)16.118.2
Adoption (10)9.54.6
GitHub stars24.1k6.9k
Weekly downloads2,559,636—
Last push2026-05-292026-05-28
LanguageShellGo
OSSF Scorecard6.86.5
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