Primitive
email for AI agents
Primitive is email infrastructure designed for AI agents. It solves the problem of giving agents a complete email surface without requiring them to manage SMTP credentials, DNS configuration, or email servers. The service provides a managed email address on a *.primitive.email subdomain, an authenticated API for sending and receiving mail, and the ability to run hosted JavaScript functions on every inbound message.
Key capabilities include a one-line "primitive chat" verb that sends a message and waits for a threaded reply, managed inbound MX handling with SPF, DKIM, and DMARC authentication, and synchronous outbound delivery that returns the recipient's SMTP response code and queue ID. The platform offers REST API, SDKs for Node, Python, and Go, a CLI, and a Model Context Protocol server with tools for sending, replying to, listing, searching, and retrieving emails. It also supports custom domains, webhook delivery with HMAC-SHA256 signing, and hosted Functions that deploy with a single command.
Primitive is built for developers building AI agents that need to communicate via email. It offers three usage-based tiers: a free Developer tier with $5 of monthly usage credits, a Power tier at $13 per month with $13 of credits, and a Platinum tier at $299 per month with $299 of credits. On the Developer tier, billable actions pause when credits run out, while Power and Platinum continue with overage billing. All plans include managed email addresses, custom domain support, and hosted Functions.
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