Integration · Customer support
Connect Claude & ChatGPT to Watermelon
Ask your AI what a customer wrote in the Watermelon inbox, to find a contact by email or phone, or to send a reply into a conversation. It can list and read conversations and messages, search, create and update contacts, and fill in your custom contact fields.
Free plan, no credit card. Takes about a minute.
Try asking
“What did the customer with [email protected] ask us last?”
The AI searches contacts by email and reads the conversation with its messages.
“Show me this week's conversations.”
It lists conversations in the inbox filtered by date, so you can open the ones you want.
“Reply in that conversation that the order ships tomorrow.”
It sends a text message into the conversation. The message is delivered to the customer.
What your AI can do
Conversations and messages
List conversations by date, read a conversation with its messages, and read single messages.
Replies
Send a message into an existing conversation, delivered straight to the customer.
Contacts and custom fields
Search, create and update contacts with name, email, phone, status and custom fields.
“Add Peter Holm, [email protected], +4520304050 as a contact.”
It searches first to avoid a duplicate, then creates the contact with name, email and phone number.
“Set the Customer number field on Jane's contact to 10442.”
It looks up the custom field's ID and updates the contact with the new value.
“Which custom fields do we have on contacts?”
It lists the custom contact fields set up in Watermelon with their IDs.
10 tools for Watermelon
These tools are switched on when you connect. You can switch any of them off, or require your approval before it runs.
create_contactChanges dataCreate a new contact with first and last name, email address, telephone number and custom `fields`. Search first to avoid duplicates.get_contactGet one contact by `contact_id`, with name, email, phone number and custom fields.get_conversationGet one conversation by its ID (passed as `message_id`), including its messages.get_messageGet one message by `message_id`.list_contactsList contacts in the Watermelon inbox, page by page, optionally filtered by `from`/`to` dates or excluding anonymous contacts.list_conversationsList conversations in the inbox, page by page, optionally filtered by `from`/`to` dates. Use to find a conversation ID.list_custom_fieldsList the custom contact fields set up in Watermelon. Use to learn field IDs before setting `fields` on a contact.search_contactsSearch contacts by a field value in `field_value`, such as a name, email address or phone number. Use this before creating a contact to avoid duplicates.send_messageVisible to othersSend a message into a conversation: `conversation_id`, `type` (usually text) and the content in `payload`. The message is delivered to the customer.update_contactChanges dataUpdate a contact's name, email address, telephone number, status or custom `fields` by `contact_id`.
Set up in three steps
- 1
Pick the app
Create a free PipMCP account and choose Watermelon from the app list.
- 2
Paste your key
Paste your API key and secret key as one value, joined by a dot: apikey.secretkey. In Watermelon go to Settings > API keys, click Create API key, name it and pick its permissions. The permissions cannot be changed later.
- 3
Add the link to your AI
You get a personal MCP link. Add it to Claude, ChatGPT or Cursor:
- Click your name, then Settings › Connectors › Add custom connector.
- Paste your link as the Remote MCP server URL.
- Switch it on from the + menu in a chat.
Questions
What can the AI do in Watermelon?
The AI can list and search contacts, read contacts, custom fields, conversations and messages. It can create and update contacts and send a message into a conversation.
Does the AI see my Watermelon API keys?
No. Your Watermelon API keys 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 read-only. Sending a message reaches the customer right away, so it can require your approval before it runs. Every tool call is logged. The permissions you pick for the Watermelon API key also limit what the AI can reach.
Does it work with ChatGPT?
Yes. In ChatGPT go to Settings › Apps & Connectors › Advanced and turn on Developer mode, then add your PipMCP 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?
PipMCP has a free plan with no credit card required. Paid plans bill per completed task. You also need your own Watermelon account.
Why do I paste the API key and secret key with a dot?
Watermelon expects both keys together in one value, the API key, a dot and the secret key: apikey.secretkey. Paste them that way into the single field in PipMCP. Pick the key's permissions carefully when you create it, because they cannot be changed later.
Let your AI work in Watermelon today.
Start free. Your key stays encrypted, and you decide what the AI may do.
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