Email & Marketing

Live

Loops MCP server

Loops' whole API as named, individually toggleable tools -- not one generic execute().

Connect Loops All connectors

Tools: 65
Read-only: 29
Write: 36; Off by default
Destructive: 5; Flagged distinctly

What it does

Loops through an assistant

Contacts, mailing lists, events, transactional emails, audience segments, campaigns, themes, reusable components and the workflow automation graph, each exposed as its own tool with its own schema. That means an assistant can read a workflow node by node and explain what it does, rather than guessing at an opaque call. Every write is opt-in, and workflow edits carry Loops' own revision token so a stale change is rejected rather than silently overwriting someone else's.

Contacts, contact properties, suppression status, mailing lists and audience segments
Campaigns and the email messages inside them, including Guardian checks
Transactional emails, groups, drafts and publishing
Workflow automation graphs, readable node by node
Themes, reusable components and image uploads
Create and update contacts, campaigns, emails and workflows (opt-in)

Ask your assistant

What people actually ask

Real questions, answered from live Loops data.

“Which contacts are suppressed, and can you check this address?”

loops_get_contact_suppressionloops_find_contact

“What does this onboarding workflow actually do, step by step?”

loops_get_workflowloops_get_workflow_node

“How is the launch campaign configured, and what does its email say?”

loops_get_campaignloops_get_email_message

Tool catalogue

65 Loops tools

Grouped by what they touch. Every tool is individually toggleable — you expose only what you want.

Transactional

8 tools3 read-only · 5 write

Showing 8 of 8 tools

loops_create_transactional_email
Write
Create a new transactional email template.
loops_ensure_transactional_draft
Write
Ensure a draft email message exists for a transactional email, creating one if needed, so it can be edited before publishing.
loops_get_transactional_email
Read-only
Get a single transactional email template.
loops_list_published_transactional_emails
Read-only
List published transactional emails via Loops' legacy, unpaginated endpoint. Prefer loops_list_transactional_emails for new integrations -- kept for parity with an older API path Loops still publishes.
loops_list_transactional_emails
Read-only
List transactional email templates on this team.
loops_publish_transactional_email
Write
Destructive
Publish a transactional email's draft, making it the live version sent by loops_send_transactional_email. Cannot be undone.
loops_send_transactional_email
Write
Send a transactional email to a contact using a published transactional email template.
loops_update_transactional_email
Write
Update a transactional email template's name or group.

Workflow nodes

7 tools1 read-only · 6 write

Showing 7 of 7 tools

loops_add_workflow_branch
Write
Add a sibling branch to a branch node (e.g. another variant to an ExperimentBranchNode, or another condition path to a BranchNode).
loops_create_workflow_node
Write
Insert a new node into a workflow's graph, either between two existing nodes, before one, or after one. To configure the node further after creation, use loops_update_workflow_node.
loops_delete_workflow_node
Write
Destructive
Delete a single workflow node. Its children are reconnected to its former parent. IRREVERSIBLE.
loops_delete_workflow_node_recursively
Write
Destructive
Delete a workflow node AND every node beneath it in the graph. IRREVERSIBLE and affects more than a single-node delete -- use with care.
loops_get_workflow_node
Read-only
Get a single node in a workflow's automation graph.
loops_reroute_workflow_node_connection
Write
Reroute a node's single outgoing connection to point at a different target node.
loops_update_workflow_node
Write
Update a workflow node's type-specific configuration (e.g. a SendEmailAction's email message, a TimerAction's delay, an AudienceFilter's conditions).

Workflows

6 tools2 read-only · 4 write

Showing 6 of 6 tools

loops_change_workflow_mailing_list
Write
Change (or clear, with mailingListId: null) the mailing list a workflow sends to. If contacts are queued that the new list would exclude, Loops returns queuedContactsFound instead of applying the change -- retry with queuedContactPolicy: "discard" to proceed and discard them.
loops_create_workflow
Write
Create a new, empty marketing-automation workflow.
loops_delete_workflow
Write
Destructive
Permanently delete a workflow and its entire node graph. IRREVERSIBLE.
loops_get_workflow
Read-only
Get a single workflow, including its current revision token (needed for any mutation) and node graph.
loops_list_workflows
Read-only
List marketing-automation workflows on this team.
loops_update_workflow_properties
Write
Update a workflow's name and/or description. Provide at least one.

Contacts

6 tools2 read-only · 4 write

Showing 6 of 6 tools

loops_create_contact
Write
Create a new contact.
loops_delete_contact
Write
Destructive
Permanently delete a contact. IRREVERSIBLE.
loops_find_contact
Read-only
Find a contact by email or userId. Provide at least one.
loops_get_contact_suppression
Read-only
Check whether a contact is on the suppression list (e.g. from a bounce or spam complaint).
loops_remove_contact_suppression
Write
Remove a contact from the suppression list so they can receive email again. Rate-quota-gated by Loops: a limited number of removals are allowed per rolling 30-day period -- the response includes the remaining quota.
loops_update_contact
Write
Update an existing contact. Identify it with email and/or userId.

Campaigns

4 tools2 read-only · 2 write

Showing 4 of 4 tools

loops_create_campaign
Write
Create a new campaign. Defaults to the team's default campaign group if campaignGroupId is omitted. Does not send it -- Loops has no API send trigger.
loops_get_campaign
Read-only
Get a single campaign.
loops_list_campaigns
Read-only
List campaigns on this team.
loops_update_campaign
Write
Update an existing campaign's targeting, group, or schedule.

Campaign groups

4 tools2 read-only · 2 write

Showing 4 of 4 tools

loops_create_campaign_group
Write
Create a new campaign group.
loops_get_campaign_group
Read-only
Get a single campaign group.
loops_list_campaign_groups
Read-only
List campaign groups on this team.
loops_update_campaign_group
Write
Rename a campaign group.

Components

4 tools2 read-only · 2 write

Showing 4 of 4 tools

loops_create_component
Write
Create a new reusable email component from an LMX body.
loops_get_component
Read-only
Get a single reusable component's content.
loops_list_components
Read-only
List reusable email components (content blocks) on this team.
loops_update_component
Write
Update a component's name or LMX content.

Themes

4 tools2 read-only · 2 write

Showing 4 of 4 tools

loops_create_theme
Write
Create a new email theme.
loops_get_theme
Read-only
Get a single theme's styles.
loops_list_themes
Read-only
List email themes on this team.
loops_update_theme
Write
Update a theme's name or styles.

Transactional groups

4 tools2 read-only · 2 write

Showing 4 of 4 tools

loops_create_transactional_group
Write
Create a new transactional email group.
loops_get_transactional_group
Read-only
Get a single transactional email group.
loops_list_transactional_groups
Read-only
List transactional email groups on this team.
loops_update_transactional_group
Write
Rename a transactional email group.

Email messages

4 tools2 read-only · 2 write

Showing 4 of 4 tools

loops_get_email_message
Read-only
Get a single email message's content (subject, body, LMX).
loops_get_email_message_guardian
Read-only
Run Loops' "Guardian" quality/deliverability checks (broken links, spam-trigger phrases, missing unsubscribe, etc.) on an email message.
loops_preview_email_message
Write
Send a preview/test send of an email message to check rendering. Sends a real email, but only a test preview, not to real recipients.
loops_update_email_message
Write
Update an email message's subject, body, or theme.

Audience segments

3 tools2 read-only · 1 write

Showing 3 of 3 tools

loops_create_audience_segment
Write
Create a new audience segment from a filter definition. The exact filter schema is Loops-specific (contact property/event conditions) -- pass it through as-is from Loops' own segment-builder export or documentation.
loops_get_audience_segment
Read-only
Get a single audience segment and its filter definition.
loops_list_audience_segments
Read-only
List audience segments on this team.

Event patterns

3 tools3 read-only · 0 write

Showing 3 of 3 tools

loops_get_event_pattern
Read-only
Get a single event pattern by ID.
loops_get_event_pattern_by_name
Read-only
Get a single event pattern by its event name.
loops_list_event_patterns
Read-only
List event patterns (distinct event names this team has sent, with usage metadata) recognized on this team.

Uploads

2 tools0 read-only · 2 write

Showing 2 of 2 tools

loops_complete_upload
Write
Finalize an upload after the file bytes have been PUT to the presigned URL from loops_create_upload.
loops_create_upload
Write
Start an image upload. Returns an emailAssetId and a presigned URL -- PUT the raw file bytes to that URL yourself (matching contentType/contentLength), then call loops_complete_upload.

Contact properties

2 tools1 read-only · 1 write

Showing 2 of 2 tools

loops_create_contact_property
Write
Define a new custom contact property. Must exist before it can be set via loops_create_contact/loops_update_contact.
loops_list_contact_properties
Read-only
List custom contact properties defined on this team.

More tools

4 tools3 read-only · 1 write

Showing 4 of 4 tools

loops_list_dedicated_sending_ips
Read-only
List this team's dedicated sending IP addresses.
loops_list_mailing_lists
Read-only
List every mailing list on this team. Not paginated -- Loops returns the full list in one call.
loops_send_event
Write
Send a custom event for a contact. Events can trigger workflows. Provide email and/or userId to identify the contact.
loops_test_api_key
Read-only
Check whether this connection's API key is valid, and which Loops team it's scoped to.

Every tool name and description, machine-readable: /llms-full.txt

Access & safety

You decide what it can touch

The same model applies to every connector, and it defaults closed.

Your own credential

You supply your own Loops key, scoped however you like on their side. It is encrypted with AES-256-GCM and never returned by any API response or tool call.

Writes off by default

A new connection switches on a read-oriented default set only. Every write tool must be enabled deliberately before any client can call it.

Roles enforced server-side

READ, WRITE and ADMIN gate tool invocation on the server, not just in the UI. A READ member's token is refused any write tool.

Setup

Connect Loops in minutes

No infrastructure to run. Copy one URL and one token into your client.

1Create a free workspace and connect Loops.
2Choose which tools to expose — writes stay off until you enable them.
3Copy your MCP endpoint URL and bearer token.
4Paste them into Claude, Cursor, or any MCP client.

claude_desktop_config.json

{
  "mcpServers": {
    "serve-mcp": {
      "url": "https://servemcp.com/api/mcp/your-workspace",
      "transport": "http",
      "headers": {
        "Authorization": "Bearer smcp_..."
      }
    }
  }
}