Mail Blaze MCP by usefulapi

Install

Pick the AI app you use, then copy the settings.

Passed 4/4 checks · What you ask goes through the maker’s server (mailblaze.usefulapi.io) · ✓ Commands checked Nov 13, 2026

claude mcp add --transport http --scope user mailblaze https://mailblaze.usefulapi.io/mcp

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

{
  "servers": {
    "mailblaze": {
      "type": "http",
      "url": "https://mailblaze.usefulapi.io/mcp"
    }
  }
}

Which apps can use it

Based on how this server connects and on each app’s own docs, checked Nov 10, 2026.

Connect over the internet in

ClaudeChatGPTGooseLM StudioMsty StudioCherry StudioCursorVS Code + GitHub CopilotVisual StudioWindsurf (Devin Desktop)ZedKiroClineContinueJetBrains AI AssistantClaude CodeCodex CLIGemini CLIOpenCodenodecodeWarpLibreChatOpen WebUIRaycast

All apps, with pros and cons →

What it can do

Tool names and descriptions exactly as the server reported them on Nov 14, 2026. The maker wrote them, not us; we show them as plain text.

• mailblaze_list_lists

  List the account's mailing lists (name, uid, subscriber counts, defaults). Use the list uid in the other tools. Paged: page + per_page.

• mailblaze_get_list

  Get one mailing list by its uid: general settings, default sender, company details and counts.

• mailblaze_list_list_fields

  List the fields of a mailing list (label, tag, type, required). The tags (EMAIL, FNAME, LNAME, custom ones) are the keys used when adding or updating subscribers.

• mailblaze_list_segments

  List the segments defined on a mailing list (uid, name). A segment uid can be used when creating a campaign.

• mailblaze_list_subscribers

  List the subscribers of a mailing list (sets of 10 per page; use page to go on). Contains personal data (emails, names).

• mailblaze_get_subscriber

  Get one subscriber of a list by subscriber uid (status, fields, dates).

• mailblaze_find_subscriber_by_email

  Look up a subscriber in one list by email address. Returns the subscriber (with its uid) or a not-found error.

• mailblaze_add_subscriber

  WRITE, MAY SEND A CONFIRMATION EMAIL: add one subscriber to a mailing list. Depending on the list's settings Mail Blaze may send the person a confirmation (double opt-in) email. Only add people who agreed to receive your email. An email that is already on the list answers with a

• mailblaze_add_subscribers_bulk

  WRITE, MAY SEND CONFIRMATION EMAILS: add up to 100 subscribers to a mailing list in one request; an email already on the list is updated instead. Depending on the list's settings Mail Blaze may send confirmation emails. Only add people who agreed to receive your email.

• mailblaze_update_subscriber

  WRITE: update a subscriber's name or custom fields. Pass the subscriber's current email (Mail Blaze requires it) plus only the values to change. Does not change subscription status.

• mailblaze_unsubscribe_subscriber

  WRITE: set a subscriber's status to unsubscribed so they receive no more campaigns from this list. By default Mail Blaze also adds the address to the account's local blacklist. Do this only when the person asked to stop (or a data-protection request requires it). The subscriber r

• mailblaze_resubscribe_subscriber

  WRITE: set a previously unsubscribed subscriber back to subscribed so campaigns reach them again. Only do this when the person asked to be re-added (consent).

• mailblaze_list_templates

  List the account's email templates (uid, name). A template uid is needed to create a campaign.

• mailblaze_get_template

  Get one email template by uid (name and content).

• mailblaze_create_template

  WRITE: create an email template from HTML (the tool base64-encodes it). Mail Blaze requires the HTML to contain an unsubscribe link. Sends nothing.

• mailblaze_list_campaigns

  List the account's email campaigns (uid, name, status, dates). Use the campaign uid for details and reports.

• mailblaze_get_campaign

  Get one campaign by uid: sender, subject, list, template, status and schedule.

• mailblaze_create_campaign

  WRITE, SENDS EMAIL TO PEOPLE: create a campaign for a mailing list (or one of its segments) from an existing template and schedule it for send_at. Once it goes out it reaches every subscriber of the list or segment, may use sending credit and cannot be recalled. Confirm the list,

• mailblaze_get_campaign_summaries

  Bulk report summary (sent, opens, clicks, bounces, unsubscribes) for up to 50 campaigns in one call. Read-only (it is a POST in the API only because of the id list).

• mailblaze_get_campaign_inbox_breakdown

  Inbox-provider breakdown (e.g. Gmail, Outlook, Yahoo) of a campaign's delivery.

• mailblaze_list_campaign_events

  List the individual events of a campaign by kind: opens, clicks, bounces or unsubscribes. Cursor-paged: pass the reply's next_cursor back until it is null. For very large campaigns Mail Blaze answers 202 with a job_id; check it with mailblaze_get_report_job.

• mailblaze_get_subscriber_activity

  Email activity (sends, opens, clicks, bounces) of one subscriber by email address, optionally limited to one list. Cursor-paged.

• mailblaze_get_report_job

  Status (and result when finished) of an asynchronous report job, as returned in a 202 reply with a job_id.

• mailblaze_list_transactional_emails

  List the transactional emails sent through the account (uid, recipient, subject, status). Paged.

• mailblaze_get_transactional_email

  Get one transactional email by uid: recipient, subject, status and timestamps.

• mailblaze_send_transactional_email

  WRITE, SENDS ONE EMAIL NOW: send a single one-to-one email to one recipient through Mail Blaze. It leaves immediately, uses sending credit and cannot be recalled. Give either html (the body) or template_id (a transactional template, with merge_tags covering every tag in it), not

Basic checksi

We check information anyone can see; we have not read the code. Checks that do not apply are left out of the count. · Checked Nov 15, 2026

• ✓ Pass

  Maker matches the repo

  The registry name was verified against the domain usefulapi.io (the registry checks domain ownership)

• ✓ Pass

  Still maintained

  Code last changed yesterday

• – Not applicable

  Has a licence

  Not applicable: a cloud server run by the owner of usefulapi.io; you don't run code from the repo

• ✓ Pass

  Endpoint responds

  Responded in 12 ms (HTTP 200)

• – Not applicable

  Sign-in with OAuth

  No sign-in needed

• ✓ Pass

  No hidden instructions in tool descriptions

  Read 26 tool descriptions and found no hidden instructions to the AI

What we check → · JSON

User reviews

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Compared with others in Marketing & social mediai

• More stars than 0% of the other 3961 servers in this category
• Published to the registry more recently than 97% of the other 3961 servers in this category
• Basic checks equal to or better than 100% of the other 3961 servers in this category

Compared with every active server in this category in the registry. Stars count only when the publisher owns the repo.

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Same category, other makers, commands already checked. Official ones first, then by stars.

Reading a card:↓ Downloads per weeki★ GitHub starsiThree pillars: reviews · checks · usageiUpdated = latest version published to the registryi

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README from the maker

{