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Laposta MCP by usefulapi

io.usefulapi/lapostausefulapi.iostreamable-httpv1.0.0Scanned

Read Laposta lists, members, campaigns and reports; add members and build campaigns.

18 tools: 3 can delete or cancel things, 1 do something that can't be undone, 1 change things and 13 only read.

Tools: 3 delete, 1 irreversible, 1 write, 13 read.
  • Reads private data · 1
  • Reads text others write · 18
  • Can send data out · 1
  • No findings

Anlyon alternative

5 of these tools change something. Run those as governed actions.

Declare what an action changes, and Anlyon puts it under a shared limit, binds every approval to the exact request, and grades the outcome. It works on any HTTPS API you can describe as an action.

Anlyon does not run, proxy or govern this MCP server. A tool your own code calls directly is not routed through Anlyon and is not governed by it.

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Tools

Grouped by what each tool does, most consequential first. Open one for its reasons and full description; descriptions are the publisher's own words.

18 tools

Deletes or cancels 3Claude Code: deny
  • laposta_add_memberWRITE: add one email address to a mailing list (subscribe).Reads text others writeNo findings

    Why it is in this group

    • The name "laposta_add_member" says "add": a word for a change.
    • The server marks it destructive (destructiveHint: true).

    What it can reach

    • untrusted-inputThe server marks it openWorldHint: true: it reaches things outside the server's own data.
    Description, as the server wrote it
    WRITE: add one email address to a mailing list (subscribe). On a double opt-in list Laposta sends the confirmation email to that address. The address must have given consent. With upsert, an existing active member's fields are overwritten; an unsubscribed member is re-activated unless suppress_reactivation is set.

    Annotations the server declares

    • title: Add a member to a list
    • destructiveHint: true
    • openWorldHint: true
  • laposta_set_campaign_contentWRITE: replace a campaign's content with your HTML, or let Laposta import it from a URL (html wins if both are given).Reads text others writeNo findings

    Why it is in this group

    • The name "laposta_set_campaign_content" says "set": a word for a change.
    • The server marks it destructive (destructiveHint: true).

    What it can reach

    • untrusted-inputThe server marks it openWorldHint: true: it reaches things outside the server's own data.
    Description, as the server wrote it
    WRITE: replace a campaign's content with your HTML, or let Laposta import it from a URL (html wins if both are given). Does not send anything. The reply's report lists problems Laposta found (javascript, missing unsubscribe link, missing images).

    Annotations the server declares

    • title: Set a campaign's content
    • destructiveHint: true
    • idempotentHint: false
    • openWorldHint: true
  • laposta_update_memberWRITE: change a member's custom field values and/or email address, or unsubscribe the member (state: unsubscribed).Reads text others writeNo findings

    Why it is in this group

    • The name "laposta_update_member" says "update": a word for a change.
    • The server marks it destructive (destructiveHint: true).

    What it can reach

    • untrusted-inputThe server marks it openWorldHint: true: it reaches things outside the server's own data.
    Description, as the server wrote it
    WRITE: change a member's custom field values and/or email address, or unsubscribe the member (state: unsubscribed). Only the fields you pass change. Re-subscribing a person is not offered here: do it in the Laposta app or with laposta_add_member upsert only when they asked for it.

    Annotations the server declares

    • title: Update a member
    • destructiveHint: true
    • idempotentHint: true
    • openWorldHint: true
Can't be undone 1Claude Code: ask
  • laposta_send_test_emailWRITE: send a test copy of a campaign (it must have content and not be sent yet) to ONE email address.Reads text others writeCan send data outNo findings

    Why it is in this group

    • The name "laposta_send_test_email" says "send": a word for sending, and what is sent cannot be taken back.

    What it can reach

    • untrusted-inputThe server marks it openWorldHint: true: it reaches things outside the server's own data.
    • outboundThe name "laposta_send_test_email" says "send": it sends or publishes something to other people.
    Description, as the server wrote it
    WRITE: send a test copy of a campaign (it must have content and not be sent yet) to ONE email address. Does not send the campaign to its recipients.

    Annotations the server declares

    • title: Send a campaign test email
    • readOnlyHint: false
    • destructiveHint: false
    • idempotentHint: false
    • openWorldHint: true
Changes things 1Claude Code: ask
  • laposta_create_campaignWRITE: create a new regular campaign (a draft: it is NOT filled, scheduled or sent).Reads text others writeNo findings

    Why it is in this group

    • The name "laposta_create_campaign" says "create": a word for a change.

    What it can reach

    • untrusted-inputThe server marks it openWorldHint: true: it reaches things outside the server's own data.
    Description, as the server wrote it
    WRITE: create a new regular campaign (a draft: it is NOT filled, scheduled or sent). Fill it with laposta_set_campaign_content, check it with laposta_send_test_email and send it in the Laposta app. The from_email must be an approved sender address of the account.

    Annotations the server declares

    • title: Create a campaign draft
    • readOnlyHint: false
    • destructiveHint: false
    • idempotentHint: false
    • openWorldHint: true
Only reads 13Show 13 read-only tools
  • laposta_get_campaignGet one campaign: name, subject, preview text, sender, reply-to, recipients, delivery moments and web version URL.Reads text others writeNo findings

    Why it is in this group

    • The name "laposta_get_campaign" says "get": a word for reading.

    What it can reach

    • untrusted-inputThe server marks it openWorldHint: true: it reaches things outside the server's own data.
    • untrusted-inputThe description's first sentence says "get" and "reply": it reads comments, which other people can write.
    Description, as the server wrote it
    Get one campaign: name, subject, preview text, sender, reply-to, recipients, delivery moments and web version URL.

    Annotations the server declares

    • title: Get a campaign
    • readOnlyHint: true
    • openWorldHint: true
  • laposta_get_campaign_contentGet the plain-text content of a campaign (and its import_url if it was imported).Reads text others writeNo findings

    Why it is in this group

    • The name "laposta_get_campaign_content" says "get": a word for reading.

    What it can reach

    • untrusted-inputThe server marks it openWorldHint: true: it reaches things outside the server's own data.
    • untrusted-inputThe description's first sentence says "get" and "url": it reads web pages, which anyone can write.
    Description, as the server wrote it
    Get the plain-text content of a campaign (and its import_url if it was imported). Set include_html to also get the full HTML (large).

    Annotations the server declares

    • title: Get a campaign's content
    • readOnlyHint: true
    • openWorldHint: true
  • laposta_get_campaign_historyRecipient events of one campaign (delivered, opened, clicked, bounced, unsubscribed ...), newest first by default, optionally within a date range.Reads text others writeNo findings

    Why it is in this group

    • The name "laposta_get_campaign_history" says "get": a word for reading.

    What it can reach

    • untrusted-inputThe server marks it openWorldHint: true: it reaches things outside the server's own data.
    Description, as the server wrote it
    Recipient events of one campaign (delivered, opened, clicked, bounced, unsubscribed ...), newest first by default, optionally within a date range. Paged by cursor. For totals use laposta_get_report.

    Annotations the server declares

    • title: Get a campaign's event history
    • readOnlyHint: true
    • openWorldHint: true
  • laposta_get_listGet one mailing list: name, state, notification addresses and member counts.Reads text others writeNo findings

    Why it is in this group

    • The name "laposta_get_list" says "get": a word for reading.

    What it can reach

    • untrusted-inputThe server marks it openWorldHint: true: it reaches things outside the server's own data.
    Description, as the server wrote it
    Get one mailing list: name, state, notification addresses and member counts.

    Annotations the server declares

    • title: Get a mailing list
    • readOnlyHint: true
    • openWorldHint: true
  • laposta_get_memberGet one member of a list by member id or email address: state, signup/confirm dates and custom field values.Reads private dataReads text others writeNo findings

    Why it is in this group

    • The name "laposta_get_member" says "get": a word for reading.

    What it can reach

    • private-dataThe description's first sentence says "get" and "email": it reads mail.
    • untrusted-inputThe server marks it openWorldHint: true: it reaches things outside the server's own data.
    • untrusted-inputThe description's first sentence says "get" and "email": it reads inbound email, which other people can write.
    Description, as the server wrote it
    Get one member of a list by member id or email address: state, signup/confirm dates and custom field values.

    Annotations the server declares

    • title: Get a member
    • readOnlyHint: true
    • openWorldHint: true
  • laposta_get_member_historyThe event history of one member (subscribed, confirmed, opened, clicked, bounced, unsubscribed, automations ...), newest first by default.Reads text others writeNo findings

    Why it is in this group

    • The name "laposta_get_member_history" says "get": a word for reading.

    What it can reach

    • untrusted-inputThe server marks it openWorldHint: true: it reaches things outside the server's own data.
    Description, as the server wrote it
    The event history of one member (subscribed, confirmed, opened, clicked, bounced, unsubscribed, automations ...), newest first by default. Optionally limited to one campaign or a date range. Paged by cursor.

    Annotations the server declares

    • title: Get a member's event history
    • readOnlyHint: true
    • openWorldHint: true
  • laposta_get_reportResult figures of one campaign: sent, accepted, unique opens and clicks, bounces, complaints, unsubscribes and their ratios.Reads text others writeNo findings

    Why it is in this group

    • The name "laposta_get_report" says "get": a word for reading.

    What it can reach

    • untrusted-inputThe server marks it openWorldHint: true: it reaches things outside the server's own data.
    Description, as the server wrote it
    Result figures of one campaign: sent, accepted, unique opens and clicks, bounces, complaints, unsubscribes and their ratios.

    Annotations the server declares

    • title: Get a campaign report
    • readOnlyHint: true
    • openWorldHint: true
  • laposta_list_campaignsList the account's campaigns (name, subject, sender, recipient lists, delivery moments).Reads text others writeNo findings

    Why it is in this group

    • The name "laposta_list_campaigns" says "list": a word for reading.

    What it can reach

    • untrusted-inputThe server marks it openWorldHint: true: it reaches things outside the server's own data.
    Description, as the server wrote it
    List the account's campaigns (name, subject, sender, recipient lists, delivery moments). Use limit/offset to page.

    Annotations the server declares

    • title: List campaigns
    • readOnlyHint: true
    • openWorldHint: true
  • laposta_list_fieldsList the custom fields of a mailing list (name, custom_name used as the key in custom_fields, datatype, required, options).Reads text others writeNo findings

    Why it is in this group

    • The name "laposta_list_fields" says "list": a word for reading.

    What it can reach

    • untrusted-inputThe server marks it openWorldHint: true: it reaches things outside the server's own data.
    Description, as the server wrote it
    List the custom fields of a mailing list (name, custom_name used as the key in custom_fields, datatype, required, options). Call this before adding or updating a member.

    Annotations the server declares

    • title: List a list's fields
    • readOnlyHint: true
    • openWorldHint: true
  • laposta_list_listsList all mailing lists of the Laposta account with member counts (active, unsubscribed, cleaned).Reads text others writeNo findings

    Why it is in this group

    • The name "laposta_list_lists" says "list": a word for reading.

    What it can reach

    • untrusted-inputThe server marks it openWorldHint: true: it reaches things outside the server's own data.
    Description, as the server wrote it
    List all mailing lists of the Laposta account with member counts (active, unsubscribed, cleaned). Use the list_id in the other tools.

    Annotations the server declares

    • title: List mailing lists
    • readOnlyHint: true
    • openWorldHint: true
  • laposta_list_membersList the members (subscribers) of a mailing list, one page at a time.Reads text others writeNo findings

    Why it is in this group

    • The name "laposta_list_members" says "list": a word for reading.

    What it can reach

    • untrusted-inputThe server marks it openWorldHint: true: it reaches things outside the server's own data.
    Description, as the server wrote it
    List the members (subscribers) of a mailing list, one page at a time. Filter by state, free-text search (email and field values) or label. Contains personal data: only fetch what the task needs.

    Annotations the server declares

    • title: List members of a list
    • readOnlyHint: true
    • openWorldHint: true
  • laposta_list_reportsResult figures of all campaigns: sent, accepted, opened, clicked, bounced, unsubscribed, with ratios.Reads text others writeNo findings

    Why it is in this group

    • The name "laposta_list_reports" says "list": a word for reading.

    What it can reach

    • untrusted-inputThe server marks it openWorldHint: true: it reaches things outside the server's own data.
    Description, as the server wrote it
    Result figures of all campaigns: sent, accepted, opened, clicked, bounced, unsubscribed, with ratios. Use limit/offset to page.

    Annotations the server declares

    • title: List campaign reports
    • readOnlyHint: true
    • openWorldHint: true
  • laposta_list_segmentsList the segments of a mailing list (a segment id can be a campaign recipient together with its list).Reads text others writeNo findings

    Why it is in this group

    • The name "laposta_list_segments" says "list": a word for reading.

    What it can reach

    • untrusted-inputThe server marks it openWorldHint: true: it reaches things outside the server's own data.
    Description, as the server wrote it
    List the segments of a mailing list (a segment id can be a campaign recipient together with its list).

    Annotations the server declares

    • title: List a list's segments
    • readOnlyHint: true
    • openWorldHint: true

This is not a safety rating, and no finding is not a safety guarantee. The groups and findings come from fixed checks of the tool definitions the server returned on the date shown, not from its code or what it does when called. How the checks work.

Exfil surface

Which tools read private data, which read text someone else can write, and which can send data out. One of each is a path a prompt injection can use.

18 paths in this server alone from private data, through text someone else wrote, to a way out. Denying 1 outbound tool breaks every one.

Reads private data1
Reads files, mail, messages, databases, secrets, calendars or repositories.
Reads text others write18
Brings in text someone else can write: web pages, inbound email, messages, issues and comments.
Can send data out1
Can carry data to people or systems: it sends, posts or publishes, or takes a recipient, channel or URL.
deny to break every path
{
  "permissions": {
    "deny": [
      "mcp__laposta__laposta_send_test_email"
    ]
  }
}

Other servers in the same agent add their own tools to these paths. Audit your whole setup to see them together.

Findings

Matches of fixed checks, with the text they matched.

No check matched anything in these tool definitions. That is not a safety guarantee.

History

Changes to its tool definitions and to its remote endpoint, newest first.

No change seen yet. Its tools are rescanned every day, and a remote endpoint is looked at once a week.

All changes to this server

Install

Pinned to version 1.0.0. Values in angle brackets are yours to fill in.

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

Run in a terminal.

Claude Code permissions

Allow the reads, ask before a change or a way out, deny the deletes. Paste into .claude/settings.json.

.claude/settings.json
{
  "permissions": {
    "allow": [
      "mcp__laposta__laposta_list_lists",
      "mcp__laposta__laposta_get_list",
      "mcp__laposta__laposta_list_fields",
      "mcp__laposta__laposta_list_segments",
      "mcp__laposta__laposta_list_members",
      "mcp__laposta__laposta_get_member",
      "mcp__laposta__laposta_get_member_history",
      "mcp__laposta__laposta_list_campaigns",
      "mcp__laposta__laposta_get_campaign",
      "mcp__laposta__laposta_get_campaign_content",
      "mcp__laposta__laposta_get_campaign_history",
      "mcp__laposta__laposta_list_reports",
      "mcp__laposta__laposta_get_report"
    ],
    "ask": [
      "mcp__laposta__laposta_create_campaign",
      "mcp__laposta__laposta_send_test_email"
    ],
    "deny": [
      "mcp__laposta__laposta_add_member",
      "mcp__laposta__laposta_update_member",
      "mcp__laposta__laposta_set_campaign_content"
    ]
  }
}

Tools that only read are allowed, tools that change things ask first, tools that delete or cancel are denied. A read that can send data out (it takes a URL, say) asks first too. It assumes the server is installed as laposta. Review it before you use it.

Capability tags behind 18 rules
  • mcp__laposta__laposta_list_lists untrusted-input
  • mcp__laposta__laposta_get_list untrusted-input
  • mcp__laposta__laposta_list_fields untrusted-input
  • mcp__laposta__laposta_list_segments untrusted-input
  • mcp__laposta__laposta_list_members untrusted-input
  • mcp__laposta__laposta_get_member private-data, untrusted-input
  • mcp__laposta__laposta_get_member_history untrusted-input
  • mcp__laposta__laposta_list_campaigns untrusted-input
  • mcp__laposta__laposta_get_campaign untrusted-input
  • mcp__laposta__laposta_get_campaign_content untrusted-input
  • mcp__laposta__laposta_get_campaign_history untrusted-input
  • mcp__laposta__laposta_list_reports untrusted-input
  • mcp__laposta__laposta_get_report untrusted-input
  • mcp__laposta__laposta_add_member untrusted-input
  • mcp__laposta__laposta_update_member untrusted-input
  • mcp__laposta__laposta_create_campaign untrusted-input
  • mcp__laposta__laposta_set_campaign_content untrusted-input
  • mcp__laposta__laposta_send_test_email untrusted-input, outbound

Pin

Keep the decision: fail CI when the tools change, follow every change, or show a badge.

Pin in CI

Fail a build when the tools you reviewed are not the tools the server serves today.

curl -s "https://anlyon.dev/api/v1/servers/io.usefulapi/laposta/verify?hash=6728b909806b5879dcfd9be5e01d0b0ff414589798144306e892e71960540f6c" | jq -e '.changed == false'

Pinned hash 6728b909806b, from Oct 26, 2026, 00:25 UTC.

Watch

Get told when its tools change: a new tool, a new description, a new class.

https://anlyon.dev/servers/io.usefulapi/laposta/changes.xml

An Atom feed. Works in any feed reader or Slack's RSS app.

Badge

anlyon.dev badge for io.usefulapi/laposta
[![anlyon.dev](https://anlyon.dev/badge/io.usefulapi/laposta.svg)](https://anlyon.dev/servers/io.usefulapi/laposta)

Source: MCP Registry · repository. Synced Oct 26, 2026, 00:25 UTC.