# Loops.so AI integration on Definable

> The email platform for modern SaaS.

## What this connects

The email platform for modern SaaS. A better way to send product, marketing, and transactional email.

Vendor: https://loops.so/

## Tools available

**12** tools available. First 12:

- `LOOPS_SO_CREATE_CONTACT` — Create Contact — Tool to add a new contact to your Loops audience. Use when you need to create a contact with email and optional properties like name, subscription status, or custom attributes. Returns 409 if contact already exists.
- `LOOPS_SO_CREATE_CONTACT_PROPERTY` — Create Contact Property — Tool to add a custom contact property to your Loops team. Use when you need to store additional contact data beyond default fields. Properties must have unique names in camelCase format and a specified data type (string, number, boolean, or date).
- `LOOPS_SO_DELETE_CONTACT` — Delete Contact — Tool to delete a contact by email address or user ID. Use when you need to remove a contact from Loops. Either email or userId must be provided to identify the contact.
- `LOOPS_SO_FIND_CONTACT` — Find Contact — Tool to search for a contact by email or userId. Use when you need to find a specific contact's details including subscription status and custom properties. Exactly one of email or userId must be provided per request.
- `LOOPS_SO_GET_CONTACT_PROPERTIES` — Get Contact Properties — Tool to retrieve a list of your account's contact properties from Loops.so. Use when you need to view all available contact properties or filter to only custom properties created by your team.
- `LOOPS_SO_GET_DEDICATED_SENDING_IPS` — Get Dedicated Sending IPs — Tool to retrieve a list of Loops' dedicated sending IP addresses. Use when you need to get IP addresses for whitelisting purposes.
- `LOOPS_SO_GET_MAILING_LISTS` — Get Mailing Lists — Tool to retrieve all mailing lists associated with your Loops account. Use when you need to browse or manage mailing list information.
- `LOOPS_SO_LIST_CUSTOM_FIELDS` — List Custom Fields — Tool to retrieve a list of custom contact properties. Use when you need to view available custom fields for contacts. Note: This endpoint is deprecated in favor of 'List contact properties'.
- `LOOPS_SO_LIST_TRANSACTIONAL_EMAILS` — List Transactional Emails — Tool to retrieve a list of published transactional emails. Use when you need to view all available transactional email templates. Supports pagination with perPage and cursor parameters.
- `LOOPS_SO_SEND_EVENT` — Send Event — Tool to send events to trigger emails in Loops. Use when you need to track user actions and trigger automated email workflows based on those events.
- `LOOPS_SO_TEST_API_KEY` — Test API Key — Tool to test API key validity and retrieve team information. Use to verify API credentials are working correctly.
- `LOOPS_SO_UPDATE_CONTACT` — Update Contact — Tool to update an existing contact by email or userId. Use when you need to modify contact properties or re-subscribe contacts. Creates a new contact if no matching record exists.

## Auth

Auth schemes: `API_KEY`.

## How agents use Loops.so

Inside a Definable workflow, Loops.so is one of the tools the **Distributor specialist** can call. Example coordination patterns:

- **Researcher → Loops.so** — the Researcher (GPT-5.5) pulls context from Loops.so (records, threads, documents), synthesises findings, and briefs the rest of the team.
- **Writer → Distributor → Loops.so** — the Writer (Claude Opus 4.7) drafts copy in brand voice, the Verifier passes it, then the Distributor writes the result into Loops.so (create record, post message, draft email).
- **Designer / Engineer → Distributor → Loops.so** — the Designer ships an asset or the Engineer ships a code change, the Distributor delivers it via Loops.so (attach file, open PR comment, post status).

The Verifier checks every Loops.so call. On rate limit, schema drift, or auth refresh it self-heals and retries — the workflow completes without manual intervention.

## Categories

- email — https://definable.ai/apps/category/email/
- marketing automation — https://definable.ai/apps/category/marketing-automation/
- transactional email — https://definable.ai/apps/category/transactional-email/

## Related

- HTML page: https://definable.ai/apps/loops_so/
- Same category (email): https://definable.ai/apps/category/email/
- All integrations: https://definable.ai/apps/
- Workflow (multi-agent loop): https://definable.ai/workflow/
- Apps llms.txt index: https://definable.ai/llms-apps.txt