Email infrastructure for AI agents: send, read replies as threads, reply in context
SendRaven is email infrastructure for AI agents. Your agent sends an email, and when the person answers, the reply comes back as structured state: threaded on Message-ID, quoted history stripped, flagged as awaiting a reply, with the sender's authentication stated. The agent answers in the same thread, and a webhook wakes it when something new arrives. Because an autonomous sender is a different risk from a backend, limits live on the API key: a daily cap, a recipient allowlist, and a hold that turns every send into a draft for a person to approve. Works over REST or MCP (Claude, Cursor, ChatGPT and any MCP client). Priced per email sent, never per contact; 3,000 emails a month free.
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Send transactional email over REST or MCP
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Inbound replies as threads, quoted history stripped
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List threads awaiting a reply and answer in the same thread
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Per-key daily caps, recipient allowlists and human approval
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Campaigns and automations that stop when someone replies
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Customer support agent that answers email in context
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Follow-up agent that nudges until the recipient replies
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Research agent that emails a question and resumes on the answer
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Onboarding and transactional email for AI-native apps
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Human-approved outreach drafted by an agent