# Sendinel

> Email + social operations control plane, purpose-built for AI-agent control via a 225-tool MCP server and a 181-path REST API.

Sendinel is the cross-channel orchestration layer for campaigns, sequences, contacts, templates, segments, and analytics across email and social media. It is not a sending provider — it routes through your provider of choice (6 email providers, Resend by default) and publishes social to 10 platforms via the SocialPublisher abstraction. Everything is controllable by an AI agent through 225 MCP tools across 28 groups, or over REST. Sendinel runs standalone at sendinel.ai and is also bundled inside the Synchronex portfolio.

## Docs

- [Developer Hub](/developer): Quickstart, REST reference, MCP setup, webhooks, SDK notes
- [REST API Quickstart](/developer#quick-start): Create a contact and send a campaign in 5 minutes
- [MCP Server Setup](/developer#mcp): Connect Claude, Cursor, or any MCP-compatible client

## API Reference

- [OpenAPI 3.1 spec](/api/v1/openapi.json): Machine-readable spec for all 181 REST paths
- [Full LLM reference](/llms-full.txt): Complete enumeration of every REST path and MCP tool
- [MCP HTTP gateway spec](/api/mcp/openapi.json): The 225 MCP tools exposed over HTTP

## MCP Tool Groups

28 groups, 225 tools: ab-testing, advisor, ai-work, analytics, approvals, automations, brand_kit, campaigns, compound, contacts, content, data, data-proposals, delivery-ops, drafts, forms, gdpr, newsletters, org, segments, short-links, sites, sms, social-posts, surveys, templates, warmup, webhooks

## Integrations

- Email delivery (6): resend, sendgrid, ses, postmark, mailgun, elastic-email
- Social publishing (10): instagram, linkedin, twitter, facebook, tiktok, youtube, pinterest, threads, reddit, bluesky
- Import sources: Customer.io, Mailchimp, Klaviyo, ActiveCampaign, Kit, Resend
- Webhooks: campaign.completed, email.bounced, email.complained, contact.unsubscribed, bounce_rate.warning, domain.dns_lost

## Authentication

- REST: `Authorization: Bearer snk_<key>` — project-scoped. Manage keys at Settings → Developer → API Keys.
- Scopes: read/write/admin (broad) or per-resource (contacts:read, campaigns:write, …).

## Bundled in Synchronex

Sendinel also runs as the email + social delivery layer inside Synchronex. Bundled tenants are auto-provisioned as a managed Sendinel project under a Synchronex Pro subscription, sent via Sendinel's own infrastructure, and driven through Synchronex's agent loop plus the brand-kit door (`POST /api/embed/brand-kit`). Cross-portfolio index: https://synchronex.ai/llms.txt

## Optional

- [Pricing](/pricing): 5 plans (free, byod, managed, agency-plus, enterprise)
- [robots.txt](/robots.txt) · [sitemap](/sitemap.xml)