Plunk

Open-source email platform for transactional emails, marketing campaigns, and contact management.
Connect it
In Keystile Automations → Connections → New connection, choose Plunk and sign in. Your AI tools and workflows then use it through Keystile; they never see the password or key.How connecting works.
Try it from your AI tool
Using Keystile, in Plunk: get all contacts (Retrieve every contact in your Plunk project).What it can do (5 actions)
| Action | What it does | Changes data |
|---|---|---|
| Custom API Call | Make a custom API call to a specific endpoint | Yes |
| Get All Contacts | Retrieve every contact in your Plunk project. | |
| Get Contact | Retrieve a single contact by ID. | |
| Send Transactional Email | Send a transactional email through Plunk. Recipient can be a single address or a comma-separated list. | |
| Track Event | Track a Plunk event for a contact. Plunk auto-creates the contact if they do not exist. Requires the public API key. |
How Keystile protects it
Every Plunk action is checked before it runs, whether it comes from an AI tool or a workflow. 1 of its actions change data; your rules, limits and budgets decide whether each is allowed, held for a person or stopped, and it all goes into the signed record.
Use Plunk with your AI assistant — safelyClaude, Cursor or ChatGPT do the work; Keystile checks every action first.
Get early access