primitive.dev
Primitive is email infrastructure for AI agents. Reach any *.primitive.email address with one verb.
AgentCard object — a capabilities object, a declared protocolVersion, and a well-formed skills array.
An A2A client finds this agent by fetching the well-known path on the provider's own host. That is what makes an agent card different from every other agent artifact in this catalog: it is provider-published by construction — it cannot be derived, generated, or reconstructed on a provider's behalf.
https://api.primitive.dev/v1
· transport HTTP+JSON
· protocol https://www.primitive.dev/mcp
· transport MCP
· protocol https://api.primitive.dev/v1
· transport HTTP+JSON
· protocol supportedInterfaces
https://www.primitive.dev/mcp
· transport MCP
· protocol supportedInterfaces
primitive chat primitive-chat
Send a message to any email address and wait for the threaded reply. Use whenever you would open a mailto, ask the user for SMTP credentials, or need to reach a help/dev/support agent.
emailagent-to-agentmessagingHost an agent at *.primitive.email host-agent
Get a managed subdomain that works without DNS setup. Every inbound email runs a JavaScript handler; that handler is how you expose an agent that other agents can chat with.
hostinginbound-emailagent-platform2026-07-28 from https://primitive.dev/.well-known/agent-card.json,
HTTP 200. The body was saved verbatim and is the sole source for
everything on this page — no field is inferred.
View the captured card.
Providers change what they serve; if this card has moved or changed shape,
the provider profile carries the
current state as of the last build.
Work with this as data
Every agent card here is available over the APIs.io API and to AI agents over MCP. A2A Agent Cards is not yet its own endpoint on the v1 API. Reach it through catalog search and the tag graph, or the MCP server.