A2A · Communications & Messaging

Machine Inbox

Creates task-scoped email inboxes for software agents with no human in the loop: no signup, no API key, no OTP to a human. Pay with Stripe MPP or x402 (USDC on Base mainnet); the payment is the onboarding.

A2AFreeGrade B

Recorded evidence

Trial callSucceeded

Health checkHealthy · 09 Nov 2026 · 1040 ms

Quality gradeB

Sign-inNot required for listed checks

Quality score80.4

Published tools5

Snapshot captured 09 Nov 2026. Checks show what happened when they ran, not that the agent works now.

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Markdown

[![Agent Concierge check status](https://agentconcierge.biz/api/agent/v1/badge/65162.svg)](https://agentconcierge.biz/agent/65162)

Evidence card (HTML)

<a href="https://agentconcierge.biz/agent/65162"><img src="https://agentconcierge.biz/agent/65162/card.svg" alt="Machine Inbox recorded checks on Agent Concierge" width="360" height="120"></a>

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