@sendinel/mcp-server

@sendinel/mcp-server

Sendinel's published MCP server package for local stdio clients such as Claude Desktop, Claude Code, Cursor, and Codex CLI.

AI-controlled email operations control plane for campaigns, contacts, segments, templates, analytics, deliverability, and multi-provider sending across the Sendinel portfolio.

• Categories: email, marketing, crm, automation, analytics
• Official registry name: ai.sendinel/mcp-server
• Hosted remote endpoint: https://sendinel.ai/mcp
• npm package: @sendinel/mcp-server
• Source: https://github.com/kmdesle/sendinel-ai/tree/main/packages/mcp-server

Tool groups

Sendinel currently exposes 34 tool groups and 308 tools (gateway mode adds 3 meta-tools). These counts are checked against the tool registry in CI, so this table matches what ships.

Group	Count	Purpose
ab-testing	4	A/B test creation, listing, significance checks, winner promotion
advisor	6	Campaign advisor: recommendations, benchmarks, subject/content/send-time guidance
ai-work	9	AI work items, recommended segments, context events, agent proposals
analytics	17	Stats, portfolio analytics, domain health, engagement, deliverability, revenue analytics
approvals	2	Poll and list risk-tiered action approvals
automations	7	Automation triggers, previews, and response-gated escalation ladders
brand_kit	5	Brand Core text import, media library upload/URL ingest, asset-context reads
campaigns	36	Full campaign lifecycle: create, edit, approve, launch, enroll, schedule, sequence templates
cloud-import	6	Cloud storage import
compound	4	Higher-level campaign/template/site setup and delivery diagnosis workflows
connector	6	BYOD connector status, table discovery, schema/view setup, mapping, resync
contacts	37	Subscriber CRUD, saved views, tags, email log, suppression, merge, timeline
content	14	Content blocks, gated asset links, blog ingest and auto-publish, sources
data	19	Platform connectors, imports, API keys, migration jobs, notifications, tenant export
data-proposals	3	Data-derived campaign proposal generation, listing, approval
delivery-ops	23	Domains, DNSBL, deliverability diagnostics, queue, DLQ, exports, blackout dates
drafts	6	Draft create/approve/reject and draft-to-campaign promotion
forms	3	Form creation, listing, stats
gdpr	4	Contact data deletion and GDPR log
landing-pages	5	Landing page CRUD
lists	7	Static contact lists and membership management
newsletters	12	Newsletter publications, issues, subscribers, scheduling, sending, stats
org	20	Team members, plan usage/limits, audit log, model registry, white-label, provider switching
segments	6	Audience builder: create, edit, natural-language generation, preview
short-links	3	Short links, click stats, QR codes
signatures	4	Sending signature blocks
sites	5	Site, sender, and brand voice management
skills	2	Operator skills catalog
sms	7	SMS send, log, consent, inbound
social-posts	6	Social post creation, adaptation, scheduling state, archive/delete
surveys	5	Survey creation, listing, status, results
templates	7	Email template CRUD, version restore, migration translation
warmup	4	IP/domain warmup schedule control
webhooks	4	Webhook subscription management

Install / run

npx -y @sendinel/mcp-server@latest

The package also exposes the legacy bin alias:

npx -y sendinel-mcp

Required environment

• SENDINEL_API_KEY

Optional server-side env when you run the package outside the main Sendinel app environment:

• SUPABASE_URL or NEXT_PUBLIC_SUPABASE_URL
• SUPABASE_SERVICE_ROLE_KEY
• MCP_TRANSPORT (stdio by default, http for HTTP/SSE mode)
• MCP_SERVER_PORT (HTTP mode only)

Stdio mode fails closed if SENDINEL_API_KEY is missing or invalid.

MCP client examples

Claude Desktop / Cursor

{
  "mcpServers": {
    "sendinel": {
      "command": "npx",
      "args": ["-y", "@sendinel/mcp-server@latest"],
      "env": {
        "SENDINEL_API_KEY": "snk_your_api_key"
      }
    }
  }
}

Codex CLI

[mcp_servers.sendinel]
command = "npx"
args = ["-y", "@sendinel/mcp-server@latest"]

[mcp_servers.sendinel.env]
SENDINEL_API_KEY = "snk_your_api_key"

Or add it automatically:

codex mcp add sendinel --env SENDINEL_API_KEY=snk_your_api_key -- npx "-y" "@sendinel/mcp-server@latest"

Transport

• stdio by default
• http when MCP_TRANSPORT=http

Publishing

This package is intended to be published publicly to npm and listed in MCP directories:

• package name: @sendinel/mcp-server
• default launcher: npx -y @sendinel/mcp-server@latest
• official registry manifest: server.json
• Smithery config: ../../smithery.yaml