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Omnisend Automation
Automate ecommerce marketing operations -- create and update contacts, manage subscriber lists with cursor pagination, run bulk batch operations, and segment audiences -- all orchestrated through the Composio MCP integration.
Toolkit docs: composio.dev/toolkits/omnisend
Setup
- Connect your Omnisend account through the Composio MCP server at
https://rube.app/mcp - The agent will prompt you with an authentication link if no active connection exists
- Once connected, all
OMNISEND_*tools become available for execution
Core Workflows
1. Create or Update a Contact
Upsert a contact by email identifier with subscription status, profile fields, and optional welcome message.
Tool: OMNISEND_CREATE_OR_UPDATE_CONTACT
| Parameter | Type | Required | Description |
|---|---|---|---|
identifiers |
array | Yes | At least one identifier object with id (email), type (email), optional channels.email.status (subscribed, nonSubscribed, unsubscribed), and sendWelcomeMessage (boolean) |
firstName |
string | No | Contact's first name |
lastName |
string | No | Contact's last name |
gender |
string | No | m or f |
birthdate |
string | No | Format: YYYY-MM-DD |
country |
string | No | Full country name |
countryCode |
string | No | ISO 3166-1 alpha-2 code (e.g., US) |
city |
string | No | City name |
address |
string | No | Street address |
postalCode |
string | No | ZIP/postal code |
2. List Contacts with Pagination
Retrieve contacts in batches with optional filters for email, phone, status, segment, or tag.
Tool: OMNISEND_LIST_CONTACTS
| Parameter | Type | Required | Description |
|---|---|---|---|
limit |
integer | No | Results per page (default: 100, max: 250) |
after |
string | No | Cursor for next page (base64-encoded ContactID) |
before |
string | No | Cursor for previous page |
email |
string | No | Filter by exact email address |
phone |
string | No | Filter by full phone number with country code |
status |
string | No | Filter by: subscribed, nonSubscribed, unsubscribed |
segmentID |
integer | No | Filter by segment ID |
tag |
string | No | Filter by tag (e.g., VIP) |
3. Get Contact Details
Retrieve the full profile for a single contact when you already have their contact ID.
Tool: OMNISEND_GET_CONTACT
| Parameter | Type | Required | Description |
|---|---|---|---|
contactId |
string | Yes | Unique contact identifier (e.g., 60e7412b1234567890abcdef) |
4. Update an Existing Contact
Patch specific fields on a contact by ID without overwriting the entire record.
Tool: OMNISEND_UPDATE_CONTACT
Requires the contactId and the fields to update. Retrieve the contact ID first via OMNISEND_LIST_CONTACTS or OMNISEND_GET_CONTACT.
5. Bulk Batch Operations
Process many records asynchronously in a single call -- contacts, products, orders, events, or categories.
Tool: OMNISEND_CREATE_BATCH
| Parameter | Type | Required | Description |
|---|---|---|---|
method |
string | Yes | POST or PUT |
endpoint |
string | Yes | Target: contacts, orders, products, events, categories |
items |
array | Yes | Array of payload objects for each operation |
eventID |
string | Conditional | Required when endpoint is events |
Use batch operations to avoid rate limits when processing large data sets.
Known Pitfalls
| Pitfall | Details |
|---|---|
| Identifier required | OMNISEND_CREATE_OR_UPDATE_CONTACT requires at least one identifier in the identifiers array -- only email type is supported |
| Cursor-based pagination | OMNISEND_LIST_CONTACTS uses base64-encoded after/before cursors, not page numbers -- follow cursors to avoid incomplete data |
| Contact ID resolution | OMNISEND_UPDATE_CONTACT requires a contactId -- always resolve it first via list or get operations |
| Batch method constraints | OMNISEND_CREATE_BATCH only accepts POST or PUT methods -- no DELETE or PATCH |
| Event ID dependency | When batching events, the eventID parameter is mandatory -- omitting it causes the batch to fail |
Quick Reference
| Tool Slug | Purpose |
|---|---|
OMNISEND_CREATE_OR_UPDATE_CONTACT |
Create or upsert a contact by email |
OMNISEND_LIST_CONTACTS |
List contacts with filtering and cursor pagination |
OMNISEND_GET_CONTACT |
Get full profile for a single contact by ID |
OMNISEND_UPDATE_CONTACT |
Patch specific fields on an existing contact |
OMNISEND_CREATE_BATCH |
Bulk async operations for contacts, products, orders, events |
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