primitive.dev bronze

docs.primitive.dev

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

a2a https://www.primitive.dev talk to it https://docs.primitive.dev/.well-known/agent-card.json its card

🇺🇸 US · Amazon.com, Inc. Checked 6d ago pushNotifications, streaming

we checked this the operator says this

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Verified by agenttru.st

Everything here is a check agenttru.st performed itself. Assurance, protocol, hosting and freshness are in the card above and are not repeated.

Certificate: Issued by Let's Encrypt domain-validated
Valid until 29 Jan 2027 as of our check on 8 Nov 2026.

Control of the hostname was checked; nothing about who operates it.

Key RSA 2048, signed SHA256-RSA, issued via YR2 under ISRG Root X1 — classical, as every publicly trusted certificate is today.

Names on this certificate (1)

docs.primitive.dev.
Connection: TLS 1.3 · X25519MLKEM768 — post-quantum hybrid key exchange, agreed with our checker on 8 Nov 2026. What this means
DANE / TLSA: Not verified
Discovery: Well-known document
This host also publishes an ARD catalog (/.well-known/ai-catalog.json) declaring 5 resources. The catalog's entries are the publisher's claims, not something agenttru.st verified.
AI use policy: Search: yesAI input: yesAI training: yes

What this site's robots.txt says about how AI may use its content. Recorded as the operator wrote it, not enforced — these are preferences about use, not access, and agenttru.st only reads the agent's own discovery documents.
AI-facing documents: Publishes /llms.txt — “primitive.dev” a curated map of the site's content for language models

Publishes a Web Bot Auth key directory (1 key, EdDSA) — the operator publishes keys so their agent's signed requests can be verified. agenttru.st recorded that the directory exists; it has not verified a signature.

Fetched from this host during verification. Neither document is how this agent was discovered.
First seen: 31 Oct 2026

View verification details

Assurance: bronze Bronze — agent card fetched over HTTPS with a valid certificate
Protocols: A2A verified by handshake or card fetch, not merely advertised
Hosted in: 🇺🇸 US · Amazon.com, Inc. (AS16509)
Last checked: 6d ago

What this agent says it can do

Declared in the agent's own card. agenttru.st has not tested whether it completes any of these tasks — the operator of docs.primitive.dev controls every word below.

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

Examples it gives

primitive chat dev@agent.primitive.dev "How do I deploy a Function?"
primitive chat support@vendor.com "Our API key is locked, can you reset it?"

Host an agent at *.primitive.email

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

agenttru.st compared this card's skill list with every other listing's: 4 other listings declare an identical one, ignoring case, spacing and each card's own hostname. See all 5. That says the cards' text is the same, not who runs them.

What kind of listing

docs. hostname: Its hostname begins docs.

Checked by agenttru.st against this listing's hostname and card — facts about a name or an address, not about what the agent does. How kinds are decided.

What its catalog declares

From the ARD catalog this host publishes at /.well-known/ai-catalog.json. The operator controls every entry; agenttru.st verified that the catalog exists and parses, and nothing about what the entries say.

Primitive MCP server

mcp-server-cardtrust manifest

Send, receive, search, and reply to email over MCP (Streamable HTTP). Bearer-authenticated; ships an in-agent ui:// MCP App widget that renders the inbox inside ChatGPT and Claude.

https://www.primitive.dev/.well-known/mcp/server-card.json

Primitive agent (A2A)

a2a-agent-cardtrust manifest

A2A agent card for Primitive: email identity and send/receive capabilities addressable over the protocol every business already uses.

https://www.primitive.dev/.well-known/agent-card.json

primitive-chat skill

ai-skill+mdtrust manifest

Reach a person or another agent over email with the `primitive chat <email> <message>` verb — sends and waits for the threaded reply without SMTP credentials.

https://raw.githubusercontent.com/primitivedotdev/skills/main/skills/primitive-chat/SKILL.md

primitive-inbox skill

ai-skill+mdtrust manifest

Get a managed *.primitive.email address to receive mail, wait for a message, and run JavaScript on every inbound email — no SMTP, DNS, or mail server.

https://raw.githubusercontent.com/primitivedotdev/skills/main/skills/primitive-inbox/SKILL.md

Primitive REST API (v1)

openapitrust manifest

OpenAPI 3.1 spec for the full v1 REST surface: send, receive, search, Primitive Memories, domain management, and hosted Functions.

https://www.primitive.dev/openapi.json

Technical agent card

Copied from the agent's card. The operator controls these values; agenttru.st has not verified them.

Provider: primitive.dev — what this agent says about itself; other agents claiming the same provider are not thereby related
Protocol: a2a
Version: 1
Card completeness: complete all eight fields required by a2a.proto v1.0

View all card details

Capabilities: pushNotifications streaming
Agent card: https://docs.primitive.dev/.well-known/agent-card.json

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