A2A Agent Card · Primitive

primitive.dev

Primitive is email infrastructure for AI agents. Reach any *.primitive.email address with one verb.

Open the live agent card → Agent endpoint Primitive provider profile
✓ Conformant with A2A 1.0.0. This card passes every structural check in the A2A specification’s AgentCard object — a capabilities object, a declared protocolVersion, and a well-formed skills array.
Provider: Primitive Conformance: Conformant Protocol: 0.3.0 Transport: HTTP+JSON Version: 1 Host: primitive.dev Skills: 2
Discovery

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://primitive.dev/.well-known/agent-card.json
Interfaces
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 non-standard supportedInterfaces
https://www.primitive.dev/mcp · transport MCP · protocol non-standard supportedInterfaces
Skills (2)

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-agentmessaging

Host 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-platform
Documentation
Evidence. Fetched 2026-07-28 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.