MCP server

MailBluster MCP by usefulapi

io.usefulapi/mailbluster

Checked 25 Oct 2026, 20:29 UTC · Connected to it and listed its tools

Manage MailBluster leads, custom fields, products and orders: look up, add and update records.

Website Source

At a glance

Type

MCP server

Publisher

usefulapi.io (verified by the MCP Registry)

Status

Working at last check

Tools

13

Token cost

About 3,556 tokens per request

Sets up in

Claude Code, Claude Desktop, Codex, Gemini CLI, Cursor, VS Code, Antigravity, ChatGPT, OpenAI API, Grok

Last checked

25 Oct 2026, 20:29 UTC

Connect it to your agent

Add to CursorAdd to VS CodeVS Code Insiders

Opens the app, which shows the server and asks you to confirm. For other apps, copy the setup below.

Claude Code

claude mcp add --transport http mailbluster https://mailbluster.usefulapi.io/mcp

Claude Desktop

Settings → Connectors → Add custom connector, and paste the URL.

Codex (config.toml)

[mcp_servers.mailbluster]
url = "https://mailbluster.usefulapi.io/mcp"

Gemini CLI

{"mcpServers":{"mailbluster":{"httpUrl":"https://mailbluster.usefulapi.io/mcp"}}}

Cursor

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

VS Code

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

Antigravity

agy mcp add mailbluster https://mailbluster.usefulapi.io/mcp

ChatGPT

Settings → Apps & Connectors → Advanced settings: turn on Developer mode, then Create a connector and paste the URL. Which plans can do this varies.

OpenAI API (Responses tools)

{"type":"mcp","server_label":"mailbluster","server_url":"https://mailbluster.usefulapi.io/mcp","require_approval":"always"}

Grok (xAI API tools)

{"type":"mcp","server_label":"mailbluster","server_url":"https://mailbluster.usefulapi.io/mcp"}

Tools

• mailbluster_create_field ~172 tokens
  WRITE: create a custom lead field. The merge tag is the key used in lead `fields` and in email templates. Creating a field changes the brand's data model but sends nothing. POST /fields.
• mailbluster_create_lead ~529 tokens
  WRITE: add a lead (contact) to the brand. `subscribed` defaults to FALSE: the lead is stored but is not subscribed to email. Only set subscribed=true when the person has given consent to receive email from this brand (the user is responsible for lawful consent); this server never subscribes anyone o
• mailbluster_create_order Sends messages · Moves money · ~799 tokens
  WRITE: record an order (a tracking record: it does not take payment, charge a card or send email). The customer's email becomes a lead if none exists, and the lead's tags are merged. `customer.subscribed` is REQUIRED because MailBluster would otherwise default it to true: pass false unless the custo
• mailbluster_create_product ~150 tokens
  WRITE: register a product record (your own id plus a name) so orders can reference it. Sends nothing to anyone and charges nothing. POST /products.
• mailbluster_get_lead ~176 tokens
  Get one lead by email address (the server computes the MD5 id MailBluster uses): name, custom fields, timezone, subscribed and opt-in status, tags, created/updated dates. MailBluster has no list-leads endpoint. GET /leads/{md5(email)}.
• mailbluster_get_order ~97 tokens
  Get one order record by the id it was created with. GET /orders/{order_id}.
• mailbluster_get_product ~102 tokens
  Get one product record by the id you registered it under. GET /products/{product_id}.
• mailbluster_list_fields ~87 tokens
  List the brand's custom lead fields: id, label and merge tag. Use the merge tags as keys of `fields` when creating or updating leads. GET /fields.
• mailbluster_list_orders ~185 tokens
  List order records (id, currency, total price, customer lead, campaign, line items). These are records kept in MailBluster for tracking; no payment is involved. Paged: see meta.nextPageNo. GET /orders.
• mailbluster_list_products ~179 tokens
  List product records (id, name, dates) the brand has registered for e-commerce tracking. Paged: the reply's meta has total and nextPageNo (null on the last page). GET /products.
• mailbluster_update_lead ~551 tokens
  WRITE: change an existing lead's name, custom fields, email, timezone, IP address, subscription flag or tags (send only what should change). `subscribed` is left alone unless you pass it; false unsubscribes the lead, true re-subscribes. Only set subscribed=true when the person has given consent to r
• mailbluster_update_order ~406 tokens
  WRITE: change an order record's campaign, currency, total or items (send only what should change; `items`, when given, REPLACES all previous items). The customer cannot be changed here. No payment or email is involved. PUT /orders/{order_id}.
• mailbluster_update_product ~123 tokens
  WRITE: rename a product record. PUT /products/{product_id}.

Browse

• Email
• Payments
• Online shops
• Email marketing

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