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MCP Integrations Letterdrop
MCP & AI Agent Integration

Letterdrop
automation.

14 AI agent actions for Letterdrop — callable from any MCP-compatible runtime, Claude, Cursor, or Cerebral OS workflow. Use Letterdrop to manage subscribers, trigger campaigns, and personalize outreach at scale. Full governance, audit trail, and dry-run safety on every execution.

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No credit card required
Live in production environments
<200ms median execution
Dry-run before production
Execution trace
live
14
actions
100%
governed
<200ms
latency
14
AI agent actions
6
Read operations
8
Write operations
2
High-risk actions (approval gated)
Marketing Letterdrop is a Marketing integration — use it to automate email campaigns, audience management, and automation from any AI agent or MCP-compatible runtime.
Actions

What you can do
with Letterdrop.

Every action below is available as an MCP tool and a verb in Cerebral OS — callable from any AI agent, Claude, Cursor, Windsurf, or your own runtime via the BYOA API. All executions are governed, audited, and dry-run safe.

Get Analytics
letterdrop:get_analytics
Get analytics data for posts, campaigns, or overall performance.
Read Low risk
Get Campaign
letterdrop:get_campaign
Fetch a single campaign by ID with posts, performance metrics, and settings.
Read Low risk
Get Post
letterdrop:get_post
Fetch a single post by ID with content, status, and publishing details.
Read Low risk
List Campaigns
letterdrop:list_campaigns
List campaigns with filtering and search capabilities.
Read Low risk
List Posts
letterdrop:list_posts
List posts with filtering and search capabilities.
Read Low risk
List Team Members
letterdrop:list_team_members
List team members with filtering and search capabilities.
Read Low risk
Create Campaign
letterdrop:create_campaign
Create a new campaign for organizing content marketing efforts.
Write Medium risk
Create Post
letterdrop:create_post
Create a new post with content and publishing options.
Write Medium risk
Delete Campaign
letterdrop:delete_campaign
Permanently delete a campaign. This action cannot be undone.
Write High risk
Delete Post
letterdrop:delete_post
Permanently delete a post. This action cannot be undone.
Write High risk
Publish Post
letterdrop:publish_post
Publish a post immediately or schedule it for later publication.
Write Medium risk
Unpublish Post
letterdrop:unpublish_post
Unpublish a live post, making it draft status again.
Write Medium risk
Update Campaign
letterdrop:update_campaign
Update an existing campaign with new settings or team assignments.
Write Medium risk
Update Post
letterdrop:update_post
Update an existing post with new content or publishing settings.
Write Medium risk
MCP & Runtime API

Call Letterdrop
from any AI agent.

Any AI agent — Claude, Cursor, LangChain, AutoGen, or your own — can call Letterdrop actions through the Cerebral OS Runtime API. Governance, credentials, and audit trail fire automatically.

letterdrop:get_analytics READ
# Call via Runtime API
curl
-X POST \
  "https://api.cerebralos.com/v1/runtime/actions/run"
  -H "X-API-Key: YOUR_KEY" \
  -d '{
    "verb": "letterdrop:get_analytics",
    "args": {},
    "execution_id": "agent-001"
  }'
letterdrop:create_campaign WRITE
# Dry-run first — no production risk
curl
-X POST \
  "https://api.cerebralos.com/v1/runtime/actions/run"
  -H "X-API-Key: YOUR_KEY" \
  -d '{
    "verb": "letterdrop:create_campaign",
    "args": {},
    "execution_id": "agent-001",
    "metadata": {"dryRun": true}
  }'
Get your Runtime API key at app.cerebralos.com/signup — 1,000 free executions, no credit card required.
AI agent examples

What your AI agent
can do with Letterdrop.

Real patterns your AI agent can execute via MCP or the Runtime API. Every action governed, dry-run safe, and fully audited.

Trigger
AI agent needs Letterdrop data
Call letterdrop:get_analytics via MCP or Runtime API
AI processes result and takes next action
Full execution logged to audit trail automatically
Trigger
Workflow needs to write to Letterdrop
Dry-run validates letterdrop:create_campaign before execution
Approval gate fires if risk level is high
Action executes with full governance — logged, audited, reversible
Trigger
Campaign or subscriber event
Segment audience
Trigger follow-up
Log metrics to dashboard
How it works

Every Letterdrop action
governed end-to-end.

Cerebral OS isn't a connector. It's the execution layer that sits in front of Letterdrop — adding governance, dry-run safety, and a full audit trail to every operation.

Governance first
Every verb carries a risk classification. High-risk writes require explicit approval gates before they execute in production.
Dry-run safe
Simulate any Letterdrop action before it touches production. See exactly what would happen before a single real call is made.
Immutable audit trail
Every Letterdrop action is logged — what ran, what changed, who approved it, when it happened. Full history on every verb, forever.
Connect with

Letterdrop works best
alongside these.

Build multi-step workflows that connect Letterdrop to the rest of your stack. All governed. All audited.

Klaviyo Hubspot Mailchimp Google Analytics Slack
Letterdrop integration

Start free.
No credit card required.

Start free with 1,000 runs — no credit card required. Connect Letterdrop in minutes, dry-run every action before it touches production, full audit trail on everything.

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