Head to head, rubric v2.3.0
Poshmark is 25 points more agent-ready than Mercari (56/100 against 31/100). Both scores come from public HTTP responses only.
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Share of each check group passed
Machine access
Mercari 46%
Poshmark 100%
Content legibility
Mercari 27%
Poshmark 81%
Discovery surface
Mercari 25%
Poshmark 15%
Identity & policy
Mercari 0%
Poshmark 17%
Agent-facing performance
Mercari 100%
Poshmark 75%
Agent protocols
Mercari 0%
Poshmark 0%
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