Inbox

Email marketing and transactional email automation with INBOX (useinbox.com). Manage contacts, lists, campaigns, and react to delivery events.
Connect it
In Keystile Automations → Connections → New connection, choose Inbox 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 Inbox: add contact to list (Adds a single contact to an INBOX contact list. Creates the contact if the email is new, otherwise updates the existing contact and ensures it is part of the list).What it can do (7 actions)
| Action | What it does | Changes data |
|---|---|---|
| Add Contact to List | Adds a single contact to an INBOX contact list. Creates the contact if the email is new, otherwise updates the existing contact and ensures it is part of the list. | |
| Create Campaign | Schedules an INBOX campaign that sends a saved newsletter to one or more contact lists. | |
| Create Contact List | Creates a new contact list in INBOX where you can later add contacts. | |
| Custom API Call | Make a custom API call to a specific endpoint | Yes |
| Mark Contact as Unsubscribed | Changes a contact status to Unsubscribed so they stop receiving campaigns from INBOX. You can also mark them as Hard Bounce or Spam Reported. | |
| Send Transactional Email | Sends a one-off transactional email through INBOX Notify (e.g. password reset, receipt, welcome). | |
| Update Contact | Updates an existing INBOX contact. You can add or replace tags and set custom field values. |
Start a workflow when… (6 triggers)
- New Contact — Triggers when a new contact is added to your INBOX account (through a form, manual entry, import, or API).
- New Campaign — Triggers when a new campaign is created in your INBOX account.
- Email Bounced — Triggers when a transactional email permanently bounces (hard bounce) — the recipient address does not exist or is blocked.
- Email Spam Reported — Triggers when a recipient marks a transactional email as spam in their inbox.
- Email Opened — Triggers each time a transactional email is opened by the recipient. Fires on every open (not unique).
- Email Link Clicked — Triggers when a recipient clicks a tracked link inside a transactional email.
How Keystile protects it
Every Inbox 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 Inbox with your AI assistant — safelyClaude, Cursor or ChatGPT do the work; Keystile checks every action first.
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