Loops.so

email 12 tools available

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

About this integration

Connect Loops.so to Definable to triage inboxes, draft and queue follow-ups, classify and route incoming threads. Personas call Loops.so's 12 tools directly from chat or scheduled flows. Hand off to an email persona to triage, draft, and route — with you in the loop on every outbound.

Connect Loops.so to Definable and it becomes a set of typed tools your agents plan with — triggered by events, run on schedules, or invoked mid-conversation. Every write is checked by the verifier before it lands.

Auth OAuth2 · 2 clicks

Tools 12 exposed

Plans All, incl. Free

Data Never trained on

Loops.so · in workflows

What teams actually run.

Three patterns teams run with Loops.so on day one. Each one is a plain-English prompt — no canvas, no glue code — and you can remix them into anything.

Inbox triage

│ Read incoming threads

│ Classify by intent + urgency

└ Draft replies for review

Auto-follow-up

│ Detect emails awaiting reply for 3+ days

│ Draft contextual nudges

└ Queue for one-click send

Lead capture

│ Listen for inbound from a form alias

│ Extract details

└ Push to the CRM

12 tools available

The Loops.so toolbox.

Every Loops.so capability your agents can call, each with a typed schema the planner reads. The router picks the right tool per step; the verifier checks the result.

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.

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).

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.

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.

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.

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.

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.

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'.

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.

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.

Test API Key

Tool to test API key validity and retrieve team information. Use to verify API credentials are working correctly.

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.

See it run

One prompt, start to finish.

A real prompt, the Loops.so tools it calls, and what comes back. This is the whole interface — describe the outcome, agents handle the rest.

❯

Run a real Loops.so task end-to-end — plan it, execute across the API, and hand back a verified result.

loops_so.create_contact Tool to add a new contact to your Loops audience. Use when you need to create a contact wi

loops_so.create_contact_property Tool to add a custom contact property to your Loops team. Use when you need to store addit

loops_so.delete_contact Tool to delete a contact by email address or user ID. Use when you need to remove a contac · verified

done

Done. Loops.so responded across 3 calls, the verifier signed off, and the result is logged with every payload.

FAQ · Loops.so

Questions, answered.

What teams ask before connecting Loops.so.

01 What can I automate with Loops.so on Definable?

Anything Loops.so exposes through its API. Common email workflows on Definable include triage inboxes, draft and queue follow-ups, classify and route incoming threads. Personas can call any of the 12 Loops.so tools directly, then chain the result into another integration without you writing code.

02 How does Loops.so authentication work?

Loops.so uses API_KEY on Definable. You connect once from the integrations page, scoped to the permissions you choose, and from then on any persona that has the integration enabled can act on your behalf. Tokens are encrypted at rest and rotated automatically.

03 Is the Loops.so integration included in my Definable plan?

Yes — every Definable plan, including Starter, includes access to all 12 Loops.so tools. You only need a separate Loops.so subscription if Loops.so itself charges per seat or per API call.

04 Is using Loops.so through Definable secure?

Every call from a persona to Loops.so is logged with the user, persona, prompt, and response. Tokens never leave Definable's secrets vault, scopes are configurable per persona, and you can revoke access at any time from the integration page.

05 How do I get started with Loops.so on Definable?

Sign up for Definable, open the integrations page, find Loops.so, and connect via OAuth or API key. You can immediately attach Loops.so to any persona and start running workflows. The free Starter plan includes 5,000 credits/month.

06 What Loops.so actions does Definable expose?

Definable exposes all 12 Loops.so actions as callable tools — including `Create Contact`, `Create Contact Property`, `Delete Contact`, plus 9 more. Each tool gets a typed parameter schema so personas know exactly how to call it.