Mail Blaze MCP by usefulapi

Mail Blaze MCP by usefulapi

Manage Mail Blaze lists, subscribers, templates, campaigns and reports; send transactional email.

Live endpoint: https://mailblaze.usefulapi.io/mcp · Homepage: https://usefulapi.io/mailblaze

Connect

• Claude (claude.ai, Desktop): open Customize → Connectors, click + Add → Add custom connector, and paste https://mailblaze.usefulapi.io/mcp.
• Claude Code: claude mcp add --transport http mailblaze https://mailblaze.usefulapi.io/mcp, then run /mcp to log in.
• VS Code: Add to VS Code.
• Cursor and other clients: add the URL as a remote MCP server:

{
  "mcpServers": {
    "mailblaze": {
      "url": "https://mailblaze.usefulapi.io/mcp"
    }
  }
}

Add only the URL. Do not add an Authorization header or an API key to the client config: the server signs you in with OAuth, and the login page asks for your Mail Blaze credentials.

Step-by-step setup, where to find your credentials, and FAQ: https://usefulapi.io/mailblaze/

On first connect you'll paste a Mail Blaze API public key (Mail Blaze → Profile menu → API Keys: create a key and copy the Public key). The key has full access to your account; you can revoke it there at any time. Your credentials are validated, stored per-user, and scoped to you — no keys in config files.

Tools

Tool	Type	What it does
mailblaze_list_lists	read	List mailing lists
mailblaze_get_list	read	Get a mailing list
mailblaze_list_list_fields	read	List a list's custom fields
mailblaze_list_segments	read	List a list's segments
mailblaze_list_subscribers	read	List subscribers
mailblaze_get_subscriber	read	Get a subscriber
mailblaze_find_subscriber_by_email	read	Find a subscriber by email
mailblaze_add_subscriber	write	Add a subscriber
mailblaze_add_subscribers_bulk	write	Add or update subscribers in bulk
mailblaze_update_subscriber	write	Update a subscriber
mailblaze_unsubscribe_subscriber	write	Unsubscribe a subscriber
mailblaze_resubscribe_subscriber	write	Resubscribe a subscriber
mailblaze_list_templates	read	List email templates
mailblaze_get_template	read	Get an email template
mailblaze_create_template	write	Create an email template
mailblaze_list_campaigns	read	List campaigns
mailblaze_get_campaign	read	Get a campaign
mailblaze_create_campaign	write	Create and schedule a campaign
mailblaze_get_campaign_summaries	read	Get campaign report summaries
mailblaze_get_campaign_inbox_breakdown	read	Get a campaign's inbox breakdown
mailblaze_list_campaign_events	read	List a campaign's opens, clicks, bounces or unsubscribes
mailblaze_get_subscriber_activity	read	Get a subscriber's activity
mailblaze_get_report_job	read	Get a report job's status
mailblaze_list_transactional_emails	read	List transactional emails
mailblaze_get_transactional_email	read	Get a transactional email
mailblaze_send_transactional_email	write	Send a transactional email
mailblaze_usage_status	meta	Usage status (free-tier meter)
mailblaze_request_feature	meta	Request a missing feature
mailblaze_upgrade	meta	Upgrade to Pro (unlimited*)
mailblaze_cancel_subscription	meta	Cancel the Pro subscription

read tools are read-only; write tools mutate data (clients should confirm them); meta tools report usage, manage your subscription or send a feature request.

Pricing

Plan	Price	Limit
Free	$0	50 tool calls / month
Pro (per API key)	$9/mo or $90/yr (2 months free)	Unlimited*

*Pro has a fair use limit of 10,000 tool calls a month on this server. For more, write to [email protected].

Pro covers this server only. Subscribe with mailblaze_upgrade (it returns a Stripe Checkout link). Cancel any time with mailblaze_cancel_subscription: Pro continues to the end of the paid period, with no refund for the current period, and running mailblaze_upgrade before then undoes the cancel. Or write to [email protected].

License