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Laposta for AI agents

Laposta is a Dutch email newsletter platform small businesses use to manage mailing lists, members, and campaign reports for regular customer communication. Connect it once through Arc0, and your agent, or Claude, ChatGPT and Cursor, can use it through one MCP endpoint, limited to what each user approved.

Connect LapostaSee the 25 actions ↓
MarketingAPI keyMCP + RESTlaposta.nl
AUDIT LOG · LAPOSTAPOLICY: acme-support
09:41:07 · claude · u_8f2read
laposta.list_get
Get List Details✓ allowed · 212ms
09:41:08 · claude · u_8f2read
laposta.get_segment
Get Segment Details✓ allowed · 164ms
09:41:09 · claude · u_8f2write
laposta.field_get
Get Field Details✓ approved · approved by user
09:41:12 · claude · u_8f2destructive
laposta.list_delete
Delete List✕ blocked · policy: deny
EVERY LAPOSTA CALL, ON THE RECORD
01 · USE CASES

What agents do in Laposta.

01

Add a member to a list

Add a new subscriber to a mailing list after they sign up on another channel.

02

Check a campaign's report

Pull a campaign report to see open and click performance for a recent send, a read-only look at results.

03

Approve before clearing a list

Require approval before clearing all members from a list, since it cannot be reversed.

02 · ACTIONS

25 Laposta actions, graded by risk.

Every Laposta action is tagged read, write or destructive, so one policy covers the whole app and new actions inherit the right default.

read

5

Look things up. Allowed by default.

  • laposta.list_get
    Get List Details
  • laposta.get_segment
    Get Segment Details
  • laposta.list_create
    Create Mailing List
  • laposta.list_update
    Update Mailing List
  • laposta.list_get_all
    Get All Lists

write

15

Create and change things. Allow, or ask the user first.

  • laposta.field_get
    Get Field Details
  • laposta.member_get
    Get Member
  • laposta.webhook_get
    Get Webhook Details
  • laposta.field_create
    Create Custom Field
  • laposta.field_update
    Update Field
  • laposta.field_get_all
    Get All Fields
  • laposta.member_create
    Create Member
  • laposta.member_update
    Update Member
  • laposta.member_get_all
    Get All Members
  • laposta.report_get_all
    Get All Campaign Reports
  • laposta.webhook_create
    Create Webhook
  • laposta.webhook_update
    Update Webhook
  • laposta.segment_get_all
    Get All Segments
  • laposta.webhook_get_all
    Get All Webhooks
  • laposta.campaign_get_all
    Get All Campaigns

destructive

5

Delete, cancel or archive. Ask first, or deny outright.

  • laposta.list_delete
    Delete List
  • laposta.field_delete
    Delete Field
  • laposta.member_delete
    Delete Member
  • laposta.webhook_delete
    Delete Webhook
  • laposta.list_clear_members
    Clear All Members From List
03 · HOW IT WORKS

Laposta in three steps.

  1. 01Your users connect LapostaThey add their Laposta api key on Arc0 Connect, under your brand. It goes straight into the vault.
  2. 02You set the rulesReads run, writes like “get Field Details” can wait for the user, and “delete List” can be denied outright.
  3. 03Any agent can actYour agent calls Laposta through the Arc0 SDK or MCP, and so can Claude, ChatGPT and Cursor. Every call lands on the audit log.
POLICY.TS
await arc0.policies.set('laposta', {
  read: 'allow',
  write: 'ask',        // field_get
  destructive: 'deny',  // list_delete
})

# Claude Code: the same connection, one URL
$ claude mcp add --transport http arc0 \
    https://mcp.arc0.ai/u/u_8f2
04 · AUTH AND DATA

How Laposta connects.

Users add their Laposta api key on Arc0 Connect. It is encrypted in the vault, never shown to the model, and each user can rotate or revoke it at any time.

The same Laposta connection serves your agent over MCP and your own backend over REST and the proxy, so a user connects once. How Arc0 handles credentials →

AUTH
API key
CREDENTIALS
Per-tenant encrypted vault
MODEL SEES
Results only, never credentials
AUDIT LOG
Every call, on every plan
05 · WORKS WITH

Use Laposta from any agent.

Claude
ChatGPT
Cursor
Codex
VS Code
OpenAI Agents SDK
Claude Agent SDK
Vercel AI SDK
Mastra
LangGraph
06 · RELATED

More marketing apps.

Meta Ads67 actionsActiveCampaign298 actionsActiveTrail159 actionsAdobe Marketing Agent12 actionsAdtraction22 actionsAdyntel8 actionsAhrefs40 actionsAirOps96 actions
ALL MARKETING APPS →
07 · FAQ

Laposta and Arc0, answered.

Q01

Can I use Laposta with Claude, ChatGPT or Cursor?

Yes. Connect Laposta to Arc0 once, then add your Arc0 MCP URL to Claude, ChatGPT, Cursor, Claude Code or any other remote-MCP client. Each assistant only gets the Laposta actions you allow.

Q02

How do users connect Laposta?

Users add their Laposta api key on Arc0 Connect. It is encrypted in the vault, never shown to the model, and each user can rotate or revoke it at any time.

Q03

Which Laposta actions can my agent take?

25 in total: 5 read, 15 write and 5 destructive, such as “get Field Details”. Your policies decide which of them each agent may call.

Q04

Can I stop my agent from deleting things in Laposta?

Yes. Actions like “delete List” are graded destructive. Set destructive actions to deny, or to ask so the user approves each one, and blocked calls still show up on the audit log.

Q05

Can my own backend call Laposta too?

Yes. The same Laposta connection is available over REST and through the Arc0 proxy, so your product and your agent share one connection per user.

Get started

Plug Laposta into your agent.

Your users connect Laposta once, under your brand. Your agent gets 25 actions behind your policies, with every call on the record.

Connect LapostaBrowse all apps →

Free to build · MCP + REST · Audit log on every plan