Integration · Marketing

Connect Claude & ChatGPT to CLOSUM

Ask your AI to add a lead, tag a contact, or send a follow-up SMS from CLOSUM. It can list and update leads and contacts, add notes and tags, and look up lifecycle stages and custom fields. It can also send an email template, an SMS or a WhatsApp template, and check how many SMS credits you have left.

Connect CLOSUM free

Free plan, no credit card. Takes about a minute.

Try asking

“Add Maria Jensen, [email protected], as a lead and tag her webinar.”
The AI looks up lifecycle stages and fields, then creates the lead with name, email and the tag.
“What notes do we have on lead 3187?”
It reads the lead with its contact details and tags, and lists the notes on it.
“Log a note on lead 3187 that she wants a call on Monday.”
It adds the note to the lead.

What your AI can do

Leads and contacts

List, read, create and update leads and contacts, with tags, custom fields, lifecycle stage and SMS or email consent.

Notes and tags

Add notes and tags to leads, create new tags and see which tags are used on contacts.

SMS, WhatsApp and email

Send SMS from your senders, WhatsApp templates and email templates, and check SMS credits, campaigns and newsletters.

“How many SMS credits do we have left?”
It reads the remaining SMS credits on your account.
“Text +4512345678 that the order is ready for pickup.”
It lists your SMS senders, then sends the message from the sender you pick. This sends a real SMS and uses credits.
“Send our welcome email template to [email protected].”
It finds the template ID and sends the template to that address. This sends a real email.

51 tools for CLOSUM

These tools are switched on when you connect. You can switch any of them off, or require your approval before it runs.

add_lead_noteChanges dataAdd a note (`note_message`) to a lead by `lead_id`.
add_lead_tagChanges dataAdd a tag to a lead by `lead_id` and `tag`.
create_add_2Changes dataCreate a new add. API summary: Topic Add.
create_contactChanges dataCreate a contact with name, email, mobile number, birth date, tags, custom fields and SMS/email consent.
create_contact_tag_tag_by_emailVisible to othersCreate a new contact tag. Required: body. Has effects visible outside this system. API summary: Add Contact Tag By Email.
create_createVisible to othersCreate a new create. Has effects visible outside this system. API summary: Create Email Template.
create_leadChanges dataCreate a lead with name, email, mobile number, tags, custom fields, lifecycle stage and SMS/email consent. Set `update_enabled` to update an existing lead with the same details instead of failing.
create_shorten_urlChanges dataCreate a new shorten url.
create_sms_campaign_csvVisible to othersCreate a new sms. Has effects visible outside this system. API summary: CSV Sms Campaign.
create_tagChanges dataCreate a new tag with the name in `tag`.
create_updateVisible to othersCreate a new update. Has effects visible outside this system. API summary: Update Email Template.
delete_7sMoves moneyPermanently delete a 7. Financial or irreversible action; may require approval. API summary: Topic Delete.
delete_contact_tags_tag_by_emailMoves moneyPermanently delete a contact tag. Financial or irreversible action; may require approval. API summary: Remove Contact Tag By Email.
delete_delete_deleteDeletesPermanently delete a delete by contact id. Destructive action; may require approval. API summary: Contact Delete.
delete_deletesMoves moneyPermanently delete a delete. Financial or irreversible action; may require approval. API summary: Newsletter Delete.
delete_email_templateDeletesPermanently delete a delete by email template id. Destructive action; may require approval. API summary: Delete Email Template.
delete_leadDeletesPermanently delete a lead by `lead_id`. This cannot be undone.
delete_sms_campaignMoves moneyPermanently delete a delete. Financial or irreversible action; may require approval. API summary: Delete Sms Campaign.
delete_tagDeletesPermanently delete a delete by tag id or tag name. Destructive action; may require approval. API summary: Delete Tag.
get_contactGet one contact by `contact_id`.
get_event_tracker_statusChanges dataGet the current status of a event tracker. API summary: Track Page Views.
get_event_tracker_status_trackChanges dataGet the current status of a event tracker. API summary: Track Custom Events.
get_leadGet one lead by `lead_id`, with its contact details, tags and fields.
get_sms_creditsGet the number of SMS credits left on the account.
list_4sList 4s. API summary: Topic View.
list_contact_fieldsList the contact fields, including custom fields, so you know which fields can be set.
list_contact_tagsList the tags assigned to contacts.
list_contactsList the contacts in your CLOSUM account.
list_email_templatesList your email templates and their IDs.
list_lead_notesList the notes on a lead by `lead_id`.
list_leadsList the leads in your CLOSUM account.
list_lifecycle_stagesList the contact lifecycle stages and their IDs, for use when creating leads.
list_lists_3List lists. API summary: Topic List.
list_logsList logs. API summary: Load Logs.
list_newslettersList your email newsletters.
list_sales_sequencesList sales sequences. API summary: Load Sales Sequence.
list_sms_campaignsList your SMS campaigns.
list_sms_sendersList the sender numbers and names available for sending SMS.
list_tagsList the tags in your account.
list_usersList the users of your CLOSUM account.
list_viewsList views. API summary: Newsletter View.
list_views_getList views. API summary: View Sms Campaign.
list_whatsapp_templatesList your approved WhatsApp templates.
send_email_templateVisible to othersSend an email template (`template_id`) to `email_to`, with optional sender name/email, reply-to and merge values. This sends a real email.
send_smsVisible to othersSend an SMS `message` to a `recipient` phone number from a `sender`, optionally scheduled with `send_time`. This sends a real message and uses SMS credits.
send_whatsapp_templateVisible to othersSend a WhatsApp template (`template_slug`) to the number in `to`, from `from`, with template `parameters`. This sends a real message.
update_7sVisible to othersUpdate an existing 7. Has effects visible outside this system. API summary: Topic Edit.
update_leadChanges dataUpdate a lead by `lead_id`; pass the fields to change in `body` (e.g. name, email, mobile_number).
update_leads_by_emailDeletesUpdate an existing lead. Destructive action; may require approval. API summary: Lead Edit By Email.
update_sms_campaignVisible to othersUpdate an existing sms. Has effects visible outside this system. API summary: Update Sms Campaign.
update_sms_campaign_csvVisible to othersUpdate an existing sms. Has effects visible outside this system. API summary: Update CSV Sms Campaign.

Set up in three steps

1
Pick the app
Create a free HeyMyApps account and choose CLOSUM from the app list.
2
Paste your key
Paste your CLOSUM API key. Copy it from your CLOSUM account. HeyMyApps sends it as the api-key parameter on every call.
3
Add the link to your AI
You get a personal MCP link. Add it to Claude, ChatGPT or Cursor:
1. Click your name, then Settings › Connectors › Add custom connector.
2. Paste your link as the Remote MCP server URL.
3. Switch it on from the + menu in a chat.

Questions

What can the AI do in CLOSUM?

The AI can list and read leads, contacts, tags, contact fields, lifecycle stages, users, email templates, SMS senders, SMS campaigns, WhatsApp templates and newsletters. It can create and update leads, create contacts and tags, add notes and tags to leads, and send SMS, WhatsApp templates and email templates. It can delete a lead if you switch that tool on.

Does the AI see my CLOSUM API key?

No. Your CLOSUM API key are encrypted at rest and never shown to the AI. After you save them, they are not shown again, not even to you. The AI only sees the results of the tools it calls.

Can I control what the AI is allowed to do?

Yes. You choose which tools are switched on, so you can start with lookups only. Sending an SMS, a WhatsApp template or an email reaches a real person and cannot be taken back, and deleting a lead is permanent. These actions can require your approval before they run. Every tool call is logged.

Does it work with ChatGPT?

Yes. In ChatGPT go to Settings › Apps & Connectors › Advanced and turn on Developer mode, then add your HeyMyApps link. Developer mode needs a paid ChatGPT plan: Plus, Pro, Business or Enterprise. The same link also works in Claude (Settings › Connectors › Add custom connector), Cursor and other MCP clients.

What does it cost?

HeyMyApps has a free plan with no credit card required. Paid plans bill per completed task. You also need your own CLOSUM account.

Does sending SMS use my CLOSUM credits?

Yes. SMS sent by the AI go through your own CLOSUM account and use your SMS credits, the same as messages you send yourself. The AI can check the remaining credits before it sends, and you can require approval for every message.