Authenticate requests to the Contacts API using your GHL credentials. Ensure your app has the required scopes and keep tokens secure.
Authenticate to Mailchimp Transactional with your API key. Include the key in the request header to authorize each call.
– GET /contacts/:contactId — Retrieve a single contact – GET /contacts/:contactId/tasks — List tasks for a contact – GET /contacts/:contactId/tasks/:taskId — Retrieve a specific task – GET /contacts/:contactId/notes — List notes for a contact – GET /contacts/:contactId/notes/:id — Retrieve a specific note – GET /contacts/:contactId/appointments — List appointments for a contact – GET /contacts/ — List all contacts – GET /contacts/business/:businessId — List contacts for a specific business – POST /contacts/ — Create a new contact – PUT /contacts/:contactId — Update a contact – DELETE /contacts/:contactId — Delete a contact – POST /contacts/:contactId/tasks — Create a new task for a contact – PUT /contacts/:contactId/tasks/:taskId — Update a task – PUT /contacts/:contactId/tasks/:taskId/completed — Mark a task as completed – DELETE /contacts/:contactId/tasks/:taskId — Delete a task – POST /contacts/:contactId/tags — Add or update tags on a contact
When a contact is created or updated in GHL, pull the latest data to keep Mailchimp Transactional in sync.
Create or update the corresponding contact in Mailchimp Transactional; map email, firstName, lastName, and tags; handle duplicates gracefully.
GET /contacts/:contactId
contactId, email, firstName, lastName, phone
When a new contact is added in Mailchimp Transactional, create a matching contact in the Contacts API.
POST /contacts/ to create the contact; map fields; return contactId for downstream tasks.
POST /contacts/
email, firstName, lastName, phone
When a task in GHL is completed, reflect the change in Mailchimp Transactional tasks or campaigns.
PUT /contacts/:contactId/tasks/:taskId/completed; map taskId and completed flag; ensure status is synced in APPNAME.
PUT /contacts/:contactId/tasks/:taskId/completed
contactId, taskId, completed
Fast, code-free setup with visual mappings between the Contacts API and Mailchimp Transactional.
Automated data syncing keeps contact details and transactional email preferences up to date without manual work.
Real-time updates enable timely transactional emails and consistent customer data across systems.
This glossary defines core terms like API, endpoints, triggers, actions, and field mappings used in this integration.
Application Programming Interface: a set of rules that allow two applications to communicate and exchange data.
A specific URL path in an API that performs a function, such as GET /contacts/:contactId.
An event that starts an automation, such as a new or updated contact.
An operation executed in response to a trigger, such as creating or updating a contact.
Automatically sync contact records between the systems and map key fields to ensure accurate data in both places.
Trigger transactional emails in Mailchimp Transactional based on changes in Contacts API (e.g., updates to status or tags).
A dashboard showing sync status, recent changes, and error alerts across both systems.
Obtain API keys for both systems and store securely, then configure allowed scopes and endpoints.
Map core fields such as email, name, and tags to ensure data consistency.
Create test runs and live automations to verify syncing and messaging before going live.
No-code tools and automations let you connect Contacts API with Mailchimp Transactional without writing code. Use built-in mappings and triggers to sync data. For advanced needs, you can extend with custom scripts if necessary.
Both the Contacts API and Mailchimp Transactional require authentication. Use OAuth or API keys as appropriate for each service, keep credentials secure, and limit access to essential scopes only.
Key endpoints include GET /contacts/:contactId for retrieval, POST /contacts/ for creation, and PUT /contacts/:contactId for updates. For tasks, endpoints like POST /contacts/:contactId/tasks and PUT /contacts/:contactId/tasks/:taskId are commonly used.
Yes. You can filter or tag contacts in Contacts API and propagate those tags to Mailchimp Transactional to tailor transactional emails. Use endpoints that manage tags and apply rules in your automations.
Rate limits vary by provider. Plan for backoff and retries in case of throttling. Implement exponential backoff and monitor error responses to adjust retry behavior.
Handle errors with clear messages and retry logic. Use idempotent requests where possible to prevent duplicate records, and log failures for debugging.
Logs can be found in the integration dashboard or via API access logs from both systems. Set up alerts for failed syncs and monitor ongoing transfers for issues.
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Complete Operations Catalog - 126 Actions & Triggers
