primitive.dev

Primitive provides programmatic email infrastructure for developers and AI agents, including sending outbound mail, receiving inbound mail, managed inboxes and domains, and hosted functions triggered by email. It also offers durable agent state storage and agent-facing integration surfaces such as REST, MCP, and CLI tools.

6 integrations · MCP · REST · CLI

Primitive exposes a v1 REST API at api.primitive.dev, a streamable-HTTP MCP server at www.primitive.dev/mcp, and a `primitive` CLI; developers authenticate with either Primitive API keys or OAuth 2.0 public-client tokens depending on surface.

discovered 12d ago

MCP servers4

MCP serverdetectedmcp
MCP serverdetectedmcp
MCP serverdetectedmcp
Primitive MCP serverdetectedstreamable-http

REST · OpenAPI1

Primitive REST APIdiscoveredrest

CLI1

primitive CLIdiscoveredprimitive

Credentials

Primitive API keyapi_keyGet key ↗

Create an API key in Settings → API Keys. For headless agents, you can also mint one with the unauthenticated POST https://api.primitive.dev/v1/agent/accounts flow described in auth.md. Use the returned prim_... value as a Bearer token.

Primitive OAuth public client + user grantoauth2$ primitive login

Acquired by the CLI — running primitive login opens the auth flow and stores the credential.

conventions · 6/8 published

integrations.json✗/.well-known/integrations.json
llms.txt✓https://primitive.dev/llms.txt
API catalog✓https://primitive.dev/.well-known/api-catalog
OpenAPI document✓https://primitive.dev/openapi.json
MCP server card✗/.well-known/mcp/server-card.json
OAuth protected resource✓https://primitive.dev/.well-known/oauth-protected-resource
Agent card✓https://www.primitive.dev
Agent skills✓https://primitive.dev/.well-known/agent-skills/index.json

Publish these signals → /publishing