Primitive: MCP server, CLI and agent surfaces

Yes: Primitive runs a public MCP server at www.primitive.dev that listed 14 tools to a client with no credentials on 4 November 2026. Examples: getAccount, getInboxStatus, getOutboundStatus. It speaks streamable-http, protocol 2025-11-25. Ora's cached score for primitive.dev is 96, grade A+, read on 5 November 2026.

Fact sheet

Company	Primitive (registry title: primitive.dev)
Domain	primitive.dev
Category	Developer Tools (Ora leaderboard category)
MCP server	Verified (No authentication)
Ora score	96, grade A+; Ora scanned the domain on 3 November 2026 and the cached score was read on 5 November 2026 from its score API (Ora's score page for primitive.dev, a vendor-published score)
Company found through	Ora's public leaderboard
Last verified	4 November 2026

MCP server

Endpoint	`https://www.primitive.dev/mcp`
How it was found	listed in Ora's public leaderboard
Transport	streamable-http
HTTP status	200
Protocol version	2025-11-25
Server	primitive 0.3.0
Capabilities	tools, resources, prompts
Tools	14
Resources	1
Prompts	2
Connected	4 November 2026, 20:04 UTC
Handshake time	1,781 ms over 1 attempt

Tools listed

14 tools

getAccount
getInboxStatus
getOutboundStatus
listEmails
searchEmails
getEmail
replyToEmail
sendEmail
listSentEmails
getSentEmail
awaitReply
getConversation
getEmailAttachment
createEmailAddress

Connector log

2 connections on 4 November 2026, read-only methods only

19:58:59Z https://www.primitive.dev/mcp sent initialize, notifications/initialized, tools/list, resources/list, prompts/list result verified (HTTP 200) 1635 ms
20:04:06Z https://www.primitive.dev/mcp sent initialize, notifications/initialized, tools/list, resources/list, prompts/list result verified (HTTP 200) 1781 ms

Authentication

Auth type	No authentication

The sign-in route, step by step

Send the handshake to https://www.primitive.dev/mcp over streamable-http. Servers on the 2026-07-28 revision answer server/discover; older servers answer initialize.
Send tools/list, then resources/list and prompts/list if the capabilities name them.
Send no token. The connector sent none and the server answered, so any MCP client can read this list.
Calling a tool is a separate step this directory never takes.

See OAuth for MCP: client ID metadata documents and dynamic registration for how each route works.

CLI

No CLI is on record for Primitive. The directory checks a package only where a source names one, so this is a floor: a company can ship a command line that no source read for this edition mentions. See shipping a CLI agents can use.

Other agent surfaces

Agent surfaces other than MCP and CLI
Surface	Result
OpenAPI file	Found: www.primitive.dev (JSON, via a direct request).
WebMCP in the initial HTML	Detected on the home page by the shared crawl.
MCP discovery file	Found: primitive.dev/.well-known/mcp.json answered with a valid document in the shared crawl.
A2A agent card	Found: primitive.dev/.well-known/agent-card.json answered with a valid document in the shared crawl.
A2A agent card (older path)	Found: primitive.dev/.well-known/agent.json answered with a valid document in the shared crawl.
agents.json	Not found (the crawl got a non-200 answer).
OAuth authorization server metadata	Found: primitive.dev/.well-known/oauth-authorization-server answered with a valid document in the shared crawl.
NLWeb endpoint	Not checked in this edition.

Registry listings

Registry listings
Registry	Listed
Official MCP Registry	Yes: dev.primitive/email
GitHub MCP Registry	No
awesome-remote-mcp-servers	No
Smithery	Yes: primitivedotdev/primitive
Glama	Not checked: Glama's API needs a key and attribution terms.