
An MCP-based mailbox and delivery hub for messaging between Claude Code, Pi, Codex, and other terminal agents. Supports file queues, tmux injection, acknowledgments, retries, groups, and cross-host SSH federation.
Prices and medians update for the tier you select. Caution: thin market — treat statistics as indicative.
No providers in this market have a Pro-tier plan — try another tier.
Ranked by how closely each one matches a2a-mailbox's job. Prices show each provider's Pro state; entry prices are labelled as such. Unpriced products still belong to the market.
Thin market — few comparable priced products; treat statistics as indicative.