Outreach tools

If your outbound already runs somewhere else, you don't have to move it — you can have Zero feed it. Four agent actions push contacts out: Add to Loops, Add to Resend, Add to Apollo and Add to Instantly.

These are configured inside the action rather than in Settings → Connections → Integrations. Each action holds its own provider API key, and pasting one loads that provider's lists, audiences, campaigns or sequences into the action's dropdowns — which also means different agents can use different provider accounts.

Adding an outreach action

1. Open Agents from the sidebar and click New agent (or edit an existing agent).

2. Add an action and pick the tool from the Integrations category.

3. Paste the provider's API key into the action. Zero validates the key and fetches the selectable options (lists, audiences, campaigns, sequences).

4. Fill in the contact fields. Every text field accepts dynamic variables (press {), so you can map values from the trigger record or from previous actions — for example the contact's name and email.

Unsubscribe protection: the Add to Loops, Add to Resend, and Add to Instantly actions refuse to run if a contact in your workspace with the target email address is unsubscribed from all messaging. The action fails with an error instead of syncing the contact.

Add to Loops

Creates or updates a contact in Loops and subscribes it to the mailing lists you select.

Field	Behavior
Loops API Key	A Loops API key (32 lowercase alphanumeric characters). Loads your Loops lists and contact properties.
Lists (optional)	Multi-select of your Loops mailing lists. The contact is subscribed to every selected list.
Email address	The contact's email. Trimmed and lowercased before sending.
Name	Split at the first space into Loops' firstName and lastName.
Additional properties	Optional rows mapping your Loops contact properties to values. Click Add contact property, pick a property, and set its value (dynamic variables supported).

The action upserts the contact in Loops (existing contacts are updated, new ones created) and sets the contact's source to Zero.

Add to Resend

Adds a contact to a Resend audience.

Field	Behavior
Resend API Key	A Resend API key (starts with re_). Loads your Resend audiences.
Audience	The audience the contact is added to. Required — the action fails without one.
Email address	Trimmed, lowercased, and validated; the action fails on an invalid email.
Name	Split into first name and last name (everything after the first space becomes the last name).

If Resend rate-limits the request, Zero automatically retries up to 3 times, honoring Resend's Retry-After header (waiting at most 30 seconds per retry).

Add to Apollo

Creates or updates a contact in Apollo, adds it to lists, and enrolls it in sequences.

Field	Behavior
Apollo API Key (Master API Key)	Must be an Apollo Master API key. Loads your Apollo lists, sequences, and sending email accounts.
Name	Split at the first space into first and last name.
Email address	Lowercased. Used to look up whether the contact already exists in Apollo.
Title	Optional job title.
Phone Number	Optional direct phone.
Company Name	Optional organization name.
Company Website URL	Optional website URL.
Add to Lists	Multi-select of your Apollo contact lists (each shows its contact count).
Add to Sequences	Multi-select of your Apollo sequences (each shows Active/Inactive and its step count; up to 100 are listed).
Sending email account	The Apollo email account that sends the sequence emails.

The action first searches Apollo for a contact with the email address:

• Contact exists — Zero only adds the missing lists to the existing contact; its other fields are left untouched.

• Contact does not exist — Zero creates the contact with the fields above and the selected lists.

The contact is then added to each selected sequence, sending from the chosen email account.

See Apollo's docs for creating a Master API key: https://docs.apollo.io/docs/create-api-key.

Add to Instantly

Creates a lead in Instantly and optionally assigns it to a campaign.

Field	Behavior
Instantly API Key	An Instantly API key. Loads your Instantly campaigns.
Name	Split at the first space into first and last name.
Email address	The lead's email.
Phone Number	Optional phone.
Company Name	Optional company name.
Company Website URL	Optional website.
Personalization (optional)	Optional personalization text stored on the lead.
Add to Campaign (optional)	Campaign the lead is added to (up to 100 campaigns are listed).

If Instantly rejects the request, the action fails with Instantly's error message.