primitive.dev
primitivedotdev/primitiveEmail infrastructure for AI agents — send, receive, search, and manage email over a clean HTTP API. Connect verified domains, route inbound mail, set up webhooks, and automate email workflows. Authenticate with a Primitive API key or via OAuth.
Tools · 30
List all inbound domains for the organization, both verified and unverified. Each domain includes its verification status and DNS records. Use before addDomain to check whether a domain is already cla…
Claim a new domain and receive the DNS records to publish. Returns dns_records with the exact records to add. If the domain has an mx_conflict (existing mail provider), re-call with confirmed: true to…
Check DNS records for a domain claim (MX, TXT, SPF, DKIM, DMARC). On success the domain becomes verified and starts receiving mail. On failure, returns which checks passed and which still need attenti…
Download a BIND-format DNS zone file for a domain. Useful when users want to import all required DNS records at once rather than copying them individually. Returns plain text in BIND zone file format.
Use this when you need the authenticated Primitive account summary, including plan, onboarding state, and managed inbox domain. managed_inbox_address is a domain, not a complete mailbox. When it is no…
Use this when the user asks whether inbound email is ready or needs setup. Returns domains, routes, deployed Functions, and recent inbound activity.
What can I send FROM? Lists this account's verified outbound (sendable) domains plus any domains still pending DNS verification, with next actions. Call this BEFORE sendEmail to pick a valid `from` do…
Use this when you need to browse inbound emails received at verified domains with cursor pagination, status filters, date filters, or sender/recipient search.
Use this when you need to find inbound emails with structured filters or full-text matching. Use sort=received_at_asc plus date_from for new-mail polling.
Use this when you need full details for one inbound email ID, including parsed bodies, threading metadata, SMTP envelope, webhook state, and replies.
Use this when the user has selected a specific inbound email and confirmed a reply. Sends real outbound email with threading handled server-side.
Use this when the user has confirmed a new outbound email. Sends real email through Primitive's relay and can wait for the first SMTP delivery outcome, or schedule the send for a future time with sche…
SIMULATION ONLY: nothing is delivered. NEVER call this when the user actually wants an email to arrive, and never describe its result as a sent email: no message is sent, queued, or stored, and the re…
List outbound emails sent by this org, with cursor pagination and filters. Bodies are omitted from list rows to keep responses small — use getSentEmail to fetch a specific row with full body. Useful f…
Get the full record for a single sent email by id, including body_text and body_html. Use to inspect delivery details for a specific send — e.g. the SMTP response on a bounced row, or the gate denial …
Cancel a still-scheduled send before it dispatches (terminal status "canceled"; the same idempotency key becomes reusable). Pass the sent email id from a sendEmail response that used scheduled_at, or …
Wait for the threaded reply to a sent email. Call this immediately after sendEmail or replyToEmail when you expect an answer. With only the sent email's id it long-polls for up to 30 seconds by defaul…
Get the full conversation an inbound email belongs to as ordered, chat-model-ready turns with bodies. Each message is oldest-first with a direction (inbound/outbound) and a derived role (inbound→user,…
Get a conversation thread by id: metadata plus all inbound and outbound messages interleaved oldest-first. Each message has a direction (inbound/outbound) and id; fetch inbound message bodies via getE…
Download all attachments for an inbound email as a gzip-compressed tar archive. Returns the archive as a base64-encoded string along with the attachment count and SHA-256 digest. Prefer getEmail first…
List all active webhook endpoints for the organization. Each endpoint shows its URL, enabled state, and optional domain restriction.
Create a webhook endpoint to receive email.received events. If an endpoint with the same URL already exists but is deactivated, it is reactivated. After creating, call testEndpoint to confirm your sig…
Soft-delete a webhook endpoint. The endpoint will no longer receive deliveries.
Send a sample email.received event to a webhook endpoint to verify your signature verifier. Rate limited to 4/min and 30/hr. Successful deliveries and verified-domain endpoints are exempt.
List all whitelist and blocklist filter rules for the organization.
Create a whitelist or blocklist filter rule. Patterns are stored lowercase. Per-domain filters require a Pro plan.
Delete a filter rule.
List webhook delivery attempts with pagination and filters. Each delivery includes the target endpoint and a nested email object with sender/recipient/subject. Useful for diagnosing delivery failures …
Re-send a stored webhook payload from a previous delivery attempt to its original endpoint. Rate limited per org (burst + sustained windows, shared budget with email webhook replays).
Get this user's Primitive managed inbox domain, creating the account on first use: no signup form, no password, no email verification, no browser. CALL THIS FIRST whenever you do not already have a Pr…
Resources · 1
Primitive email console for viewing account, inbox, email, and delivery results returned by Primitive MCP tools.
ui://widget/primitive-email-v1.html
Prompts · 2
Retrieve the latest inbound emails and produce a prioritized triage summary.
Fetch an inbound email and its conversation history, then draft a professional reply.
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How to use
Add to your Claude Desktop / Cursor / Cline MCP config:
{
"mcpServers": {
"primitive.dev": {
"url": "https://primitive.dev/mcp",
"transport": "http"
}
}
}