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

A2A / Agent2Agent Protocol vs Model Context Protocol / MCP

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 64.7/100 (Grade B vs C). HVTrust reflects supply-chain safety, transparency, maintenance, and adoption — weighted by how much verifiable evidence exists.
SignalA2A / Agent2Agent ProtocolModel Context Protocol / MCP
HVTrust score87.564.7
Evidence gradeBC
Safety / Integrity (30)25.114.0
Transparency (20)16.816.4
Maintenance (20)16.116.4
Adoption (10)9.55.9
GitHub stars24.1k86.5k
Weekly downloads2,559,636—
Last push2026-05-292026-05-30
LanguageShellTypeScript
OSSF Scorecard6.86.4
Full A2A / Agent2Agent Protocol report → Full Model Context Protocol / MCP report → All Protocols & Tool Integration →