Mailgi

What you can do with it

We have not written a plain-language summary for this one yet. Below are the facts we read from the registry.

• Connection: Runs in the cloud
• Transport: Streamable HTTP
• Category: Chat & email
• You need to fill in: Authorization

Install

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

You need

• Runs in the cloudNothing to install; it connects over the internet

Which app do you use?

claude mcp add --transport http mailgi https://api.mailgi.xyz/mcp --header 'Authorization: your-value'

{
  "mcpServers": {
    "mailgi": {
      "url": "https://api.mailgi.xyz/mcp",
      "headers": {
        "Authorization": "your-value"
      }
    }
  }
}

{
  "servers": {
    "mailgi": {
      "type": "http",
      "url": "https://api.mailgi.xyz/mcp",
      "headers": {
        "Authorization": "your-value"
      }
    }
  }
}

Your choice stays on this device in a cookie; no account needed.

Values you fill in

• Authorization secret HTTP header
  Bearer . Optional: without it only public tools such as register_agent work.

These settings are generated from the maker’s registry entry. If the README says otherwise, follow the README.

What it can do

Tool names and descriptions exactly as the server reported them on Nov 6, 2026. The maker wrote them, not us; we show them as plain text.

• register_agent

  Creates a new agent with its own email address and returns its API key, shown once.

• org_login_request_code

  Emails a 6-digit dashboard login code to a human's address. Creates the account on first login.

• org_login_verify

  Exchanges an emailed login code for a dashboard session token.

• topup_lookup

  Shows which wallet a top-up for a Mailgi address would credit, and the allowed amounts.

• topup_start

  Creates a card payment link for the wallet behind any Mailgi address. Give it to a human to pay.

• topup_status

  Returns whether a top-up payment has been paid and credited.

• health

  Checks that the Mailgi API, its database and the mail server are up.

• agent_get

  Returns this agent's profile: its addresses, label and domain.

• agent_usage

  Returns this agent's daily send and API counters; the latest day is partial.

• agent_delete

  Permanently deletes this agent, its mailbox and all its API keys.

• mail_list

  Lists message headers in the mailbox, newest first by default; filter by folder with mailboxId.

• mail_get

  Returns one message with its full text and HTML body.

• mail_send

  Sends an email from this agent's address. Mail to outside addresses is charged to the wallet. Until the wallet is first topped up it is free, up to 50 new recipients a day, and sent mail ends with a one-line "Sent with Mailgi" footer.

• mail_delete

  Moves a message to the Trash folder.

• mail_move

  Moves a message to another folder.

• mail_set_flags

  Marks a message as seen or unseen, flagged or unflagged.

• mailbox_list

  Lists all folders, including Inbox, Sent and Trash.

• mailbox_create

  Creates a folder, optionally nested under another.

• mailbox_rename

  Renames a folder.

• mailbox_delete

  Deletes a custom folder.

• apikey_list

  Lists this agent's API keys. Key values are never shown again.

• apikey_create

  Creates another API key for this agent. The key is shown once.

• apikey_revoke

  Revokes an API key immediately.

• billing_get

  Returns the wallet this agent spends from: balance, prices, the free tier and how to top up.

• billing_topup

  Creates a card payment link for this agent's wallet. Give it to a human to pay.

• billing_transactions

  Lists the wallet ledger, newest first.

• webhook_list

  Lists this agent's webhook endpoints.

• webhook_create

  Registers an HTTPS URL to be notified when mail arrives. The signing secret is shown once.

• webhook_delete

  Deletes a webhook endpoint.

• webhook_deliveries

  Lists recent delivery attempts for a webhook endpoint.

• webhook_resend

  Queues a delivery attempt to be sent again.

• webhook_enable

  Re-enables a webhook endpoint that was switched off after repeated failures.

• org_me

  Returns the signed-in user and the organizations they belong to.

• org_logout

  Revokes the current dashboard session token.

• org_list

  Lists the organizations the signed-in user belongs to.

• org_create

  Creates an organization; the signed-in user becomes its owner.

• org_get

  Returns one organization.

• org_rename

  Renames an organization.

• org_member_list

  Lists an organization's members and their roles.

• org_member_set_role

  Changes a member's role.

• org_member_remove

  Removes a member from the organization, or leaves it when userId is your own.

• org_invite_create

  Emails an invitation to join the organization.

• org_invite_list

  Lists pending invitations.

• org_invite_revoke

  Revokes a pending invitation.

• invite_accept

  Accepts an organization invitation with the token from the invite email.

• domain_attach

  Attaches a custom domain and returns the DNS records to publish.

• domain_list

  Lists an organization's custom domains.

• domain_get

  Returns a domain's verification status and the DNS records it needs.

• domain_verify

  Re-checks the domain's DNS records and verifies it if they are correct.

• domain_detach

  Detaches a custom domain from the organization.

• domain_inbox_list

  Lists the inboxes (agents) on a domain.

• domain_inbox_create

  Creates an inbox with a chosen address on a domain. Its API key is shown once.

• domain_inbox_delete

  Removes an inbox and its mail from a domain.

• regtoken_create

  Creates a token that lets an agent register its own address on this domain. Shown once.

• regtoken_list

  Lists a domain's registration tokens.

• regtoken_revoke

  Revokes a registration token.

• org_usage

  Returns daily send, receive and API counters across the organization.

• domain_usage

  Returns daily send, receive and API counters for one domain.

• org_billing_get

  Returns the organization's shared wallet: balance, prices and how to top up.

• org_billing_topup

  Creates a card payment link for the organization wallet.

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 7, 2026

• ✓ Pass

  Maker matches the repo

  The registry name was verified against the domain mailgi.xyz (the registry checks domain ownership)

• … Not checked yet

  Still maintained

  We have not read this repo from GitHub yet

• … Not checked yet

  Has a licence

  We have not read this repo from GitHub yet

• ✓ Pass

  Endpoint responds

  Responded in 254 ms (HTTP 200)

• – Not applicable

  Sign-in with OAuth

  No sign-in needed

• ✓ Pass

  No hidden instructions in tool descriptions

  Read 60 tool descriptions and found no hidden instructions to the AI

Compared with others in Chat & emaili

• More stars than 0% of the other 1830 servers in this category
• Published to the registry more recently than 79% of the other 1830 servers in this category
• Basic checks equal to or better than 100% of the other 1830 servers in this category

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

Alternatives

Servers in the same category from other makers, sorted by stars.

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

README from the maker

npm install -g @mailgi/mailgi

import { AgentMailboxClient } from "@mailgi/mailgi";

claude mcp add --transport http mailgi https://api.mailgi.xyz/mcp

npm install                      # installs all workspaces