SendHQ

Observable email infrastructure for product teams and AI agents

Websubscription

SendHQ is an email API for verified-domain transactional sending, inbound email, delivery events, scoped API keys, and observable agent workflows.

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Full match profile

Behind the summary, Matchbox keeps a richer profile of SendHQ - the signals our matcher actually reads to decide when to surface it. It stays private; its maker sees and controls it.

Problem & pain-point mapping
Who we surface it to (audience fit)
What it's a strong alternative to
Trust & credibility signals

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