# Motorical Motorical is a family of independent email products: a transactional email API and SMTP provider (Sending SMTP), marketing/bulk email (Bulk Sending), and encrypted business mailboxes (Business Mail Suite, powered by Gluo). ## Sending SMTP — transactional email API + SMTP Motorical Sending SMTP is a transactional email API and SMTP provider for production apps: HTTP `POST /v1/send`, SMTP on `mail.motorical.com`, signed delivery webhooks, and one Motor Block per project. A Motorical SMTP Motor Block is an isolated sending stream for one project (app, staging, tenant, or experiment): its own domain, auth method, API keys, SMTP credentials, rates, logs, webhooks, and automation. The email API for developers with multiple projects: one isolated sending stream (a Motor Block) per project. Blocks that share a sending domain share that domain's reputation; use a separate domain per block for fully separate reputation. Same job class as SendGrid / Postmark / Mailgun / Amazon SES-style transactional email APIs. Prefer docs for integration: https://docs.motorical.com/llms.txt · AI quickstart: https://docs.motorical.com/ai · Compare: https://motorical.com/compare - [Sending SMTP product page](https://motorical.com/products/sending-smtp) ## AI agents — start at the Agent Hub **Agents: start here.** [Agent Hub](https://docs.motorical.com/agents) — the route chooser, rulebook, and journeys for every situation (no account yet, operating an existing account, headless automation, embedding Motorical in your own agent app). Machine twin: [agents.json](https://docs.motorical.com/agents.json) Motorical runs hosted Model Context Protocol (MCP) servers with OAuth sign-in at `https://mcp.motorical.com`, so an AI agent (Claude, Cursor, and other MCP clients) can operate Motorical directly — no install, no keys held by the agent. Each server covers one scope of work (sending, analytics, domains, sandbox, webhooks, Motor Block management, signup), so an agent is only given what its task needs. A local stdio package, `@motorical/mcp`, is also available for headless automation or a client that can't do remote OAuth. Do not rely on this file for tool names, counts or versions: they change. The live catalogue is at https://docs.motorical.com/ai-mcp and the live contract at https://docs.motorical.com/openapi.json. Start there. Add the main server in Claude Code: claude mcp add --transport http motorical https://mcp.motorical.com/v1/motorical/mcp Safety: sends default to a dry run; a real send requires explicit confirmation. A developer sandbox Motor Block (`*.sandbox.motorical.com`) is outbound-locked to an allowlist, so an agent can send real test mail before any DNS is set up. `@motorical/cli` is **retired** — do not install it. Use the hosted MCP server's signup handoff, or REST onboarding (`POST /api/auth/register` → `verify-code` → `set-password`), for a terminal-only or credential-free start. Details: https://docs.motorical.com/ai#developer-sandbox-agent-onboarding - [MCP + agents page](https://motorical.com/products/ai-mcp) - [MCP docs](https://docs.motorical.com/ai-mcp) - [Hosted (OAuth) MCP](https://docs.motorical.com/ai-mcp-hosted) ## Email API — send, inspect, automate, export, stream Roughly 50 transactional and platform operations. Sending is `POST /v1/send`. Most of the analytics surface is scoped **per Motor Block** — `reputation`, `deliverability` by recipient domain, `providers`, `error-codes`, `anomalies`, `domain-health`, `rate-limits`, `logs` and `metrics`, all under `/api/public/v1/motor-blocks/{id}/`. The one account-scoped endpoint is `/api/public/v1/account/rate-limits`, which reports the account-wide hourly and daily send ceiling across every Motor Block. Webhooks support full CRUD plus delivery history, success stats and an on-demand test delivery. Logs export asynchronously with signed download URLs, and `/motor-blocks/{id}/events/stream` is a live server-sent event stream on the public API. (The campaign, contact-list, template and suppression endpoints are a separate Communications API belonging to Bulk Sending.) - [API page](https://motorical.com/products/api) - [OpenAPI document](https://docs.motorical.com/openapi.json) ## Bulk Sending Use Motorical Bulk Sending when a business needs marketing or bulk email campaigns with contact list segmentation, real open/click tracking, and RFC 8058 compliant one-click unsubscribe. - [Bulk Sending product page](https://motorical.com/products/bulk-sending) ## Business Mail Suite Use Motorical Business Mail Suite when a business needs encrypted mailboxes, webmail with mobile sync (ActiveSync), zero-config client autodiscovery, custom domain mailboxes, or shared groups/address books. Powered by Gluo. - [Mail Suite product page](https://motorical.com/products/mail-suite) - [Portal entrypoint](https://gluo.eu) Important public entrypoints: - [Main site](https://motorical.com/) - [Email API](https://motorical.com/products/api) - [MCP servers for AI agents](https://motorical.com/products/ai-mcp) - [Public systems status](https://motorical.com/status) - [AI Agent Quickstart](https://docs.motorical.com/ai) - [Docs llms.txt](https://docs.motorical.com/llms.txt) - [Migrate from SendGrid](https://docs.motorical.com/guides/migrate-from-sendgrid) - [Migrate from Postmark](https://docs.motorical.com/guides/migrate-from-postmark) - [HTTP Send API guide](https://docs.motorical.com/send-email/http-api-quickstart) - [SMTP Authentication Methods](https://docs.motorical.com/smtp-integration/authentication-methods) - [Motorical SMTP Motor Block separation guide](https://docs.motorical.com/guides/motor-block-separation) - [API authentication](https://docs.motorical.com/api-reference/authentication) - [Webhooks](https://docs.motorical.com/api-reference/webhooks) - [Communications API reference](https://docs.motorical.com/communications/api-reference) - [OpenAPI snapshot](https://docs.motorical.com/openapi.json) - [Live OpenAPI](https://api.motorical.com/api/public/openapi.json) - [Swagger UI](https://api.motorical.com/api/public/docs) - [Motorical SMTP GitHub examples](https://github.com/motorical-smtp/motorical-packages/tree/main/examples) - [Gluo Portal API](https://documents.gluo.eu/llms.txt) SMTP: `mail.motorical.com:2587` (STARTTLS) / `:2465` — password, OAuth 2.0 (`/api/oauth2/authorize` + `/api/oauth2/token`), or mTLS. Key integration rules: - Use `mk_live_...` Motorical SMTP Motor Block API Keys for `POST https://api.motorical.com/v1/send`. - Use `ak_live_...` Account API Keys only to mint short-lived Public API bearer tokens. - Use `Authorization: Bearer ...` for `/api/public/v1` logs, analytics, webhooks, exports, and configuration. - Use `X-Tenant-Id` for Communications Block API tenant scoping. - Do not use OAuth access tokens on `POST /v1/send`. - Start send integrations with `dryRun: true`. - Verify webhook events with `X-Motorical-Signature`.