Nitrosend Claude Plugin

Use Nitrosend from Claude through the production remote MCP server. The plugin adds guided workflows for account setup, templates, campaigns, flows, transactional messages, contacts, and analytics.

Install

For local use or source review, clone this repository and load it directly:

claude --plugin-dir /absolute/path/to/claude

This repository is itself a plugin marketplace, so the standard install is:

/plugin marketplace add nitrosend/claude
/plugin install nitrosend@nitrosend

If the plugin also appears in Anthropic's official directory catalog, installing it from there is equivalent.

Connect

The bundled .mcp.json connects to:

https://api.nitrosend.com/mcp

Open the MCP or connectors UI in the Claude client, select nitrosend, and complete browser OAuth for the intended Nitrosend login. Then ask Claude to call nitro_get_status and confirm the returned account and brand.

Do not install the Nitrosend CLI or request an API key for normal Claude plugin, Claude Desktop, Claude.ai, or Cowork setup. The CLI is for terminal, CI, and headless runner workflows outside this plugin.

See SETUP.md for account switching and troubleshooting.

What Is Included

The production MCP catalog is authoritative. Claude must use the tools exposed by the connected session and must never offer a tool that is absent. Some early-access capabilities, including inbox and outreach operations, are account-gated and therefore may not appear.

Current workflow groups include:

• Context and docs: nitro_get_status, nitro_select_account, nitro_select_brand, nitro_search_docs
• Brand and sending setup: nitro_set_brand_kit, nitro_configure_account, nitro_manage_domains, nitro_configure_providers
• Audience: nitro_import_contacts, nitro_manage_audience, nitro_define_segment, nitro_search_contacts, nitro_query
• Authoring: nitro_manage_template, nitro_compose_campaign, nitro_compose_flow, nitro_ingest
• Review and delivery: nitro_review_delivery, nitro_send_test_message, nitro_control_delivery, nitro_send_message
• Operations: nitro_get_insights, nitro_manage_billing, nitro_request_support, nitro_set_memory

Supported BYO email providers are Mailgun, Amazon SES, Postmark, Resend, and SendGrid. The connected tool schema remains the authority if that set changes.

Skills

Skill	Command	Purpose
Setup	/nitrosend:setup	Connect and complete account readiness
Compose Email	/nitrosend:compose-email	Create or edit a reusable template
Send Campaign	/nitrosend:send-campaign	Draft, review, test, approve, and deliver a campaign
Send Transactional	/nitrosend:send-transactional	Send or integrate one-recipient application messages
Build Flow	/nitrosend:build-flow	Build and publish event-driven automation
Import Contacts	/nitrosend:import-contacts	Import consented contacts
Analytics	/nitrosend:analytics	Inspect account, campaign, flow, or message performance
Email Marketing Bible	/nitrosend:email-marketing-bible	Apply durable email-marketing principles

Email Marketer Agent

The bundled email-marketer agent routes work through the tools actually available in the live MCP session. In Claude Code, manage it from /agents or invoke it by its scoped agent name when the client exposes plugin agents.

In MCP-Apps-capable hosts (Claude.ai and Claude Desktop), nitro_compose_campaign and nitro_manage_template results also render an inline preview of the composed email alongside the text response.

Desktop Extension (Claude Desktop)

The mcpb/ directory packages Nitrosend as a Claude Desktop extension (.mcpb): a one-click install that proxies to the same production MCP server with browser OAuth by default and an optional account-pinning API key setting. Build it with cd mcpb && npm ci --omit=dev && npx @anthropic-ai/mcpb pack . dist/nitrosend.mcpb; see mcpb/README.md for install, troubleshooting, and the extension privacy policy.

Requirements

• A current Claude client with plugin and remote MCP support
• A Nitrosend account accessible through browser OAuth
• Network access to https://api.nitrosend.com/mcp

Validate

Validate a local checkout with the current Claude Code plugin validator:

claude plugin validate --strict /absolute/path/to/claude

Then load it with --plugin-dir, open /mcp, connect nitrosend, call nitro_get_status, and confirm the active account and brand before performing any mutation.

Links

• Nitrosend
• Nitrosend API
• Nitrosend SDK
• Setup guide

License

MIT