Connect an AI agent to Zapier

Connect an AI agent to Zapier to move the leads it captures into your CRM, spreadsheet or inbox, or to generate answers from an incoming email, ticket or form. Open your agent’s Channels → Zapier page to get started.

Zapier card on the Channels page with the Set up Zapier button — The Zapier card on the Channels page opens the Zapier setup page.

What it does

Form Submission, an instant trigger, starts a Zap when your agent captures a lead or receives a custom form or Collect data submission.
Send Prompt, an action, sends a message to your agent and returns a response that uses its instructions and business knowledge.
Each API key reaches one agent only. An agent can have up to 10 active API keys and 50 active subscriptions.
Send Prompt uses your agent’s normal credit and rate limits, and has a 25-second response budget.

What you need

Standard or above. Send Prompt consumes the workspace’s message credits at the chosen model’s rate, including extra model requests used by actions. See plans and credits.
A Centillion Labs agent and a Zapier account.
Owner or Member access, to create an API key.

If the native app is still private, use the invitation linked on the setup page. A public listing becomes searchable after Zapier approves it. If the invitation is pending, you can prepare a key and preview records, but cannot connect the native app yet. New to Centillion? Start with What Centillion is.

Set it up

This example appends every captured lead to a Google Doc.

Enable lead collection

Open Tools, choose Collect leads, and configure the details your agent should capture. Enable the action for the channels you use.

Create a Zap

In Zapier, choose Create → Zaps. Add Centillion Labs as the trigger app and select Form Submission.

Connect your account

In Centillion Labs, open Channels → Zapier → Create API key. Name the key and copy it. Paste it into Zapier’s Centillion Labs connection window. The key is shown once and only grants access to this agent. A lost key cannot be shown again: create a new one and revoke the old one.

Choose your agent and test

Select the agent or paste its ID from the setup page. Click Test trigger, then Continue with selected records. Capture a real lead first for the most useful test. An empty agent returns an example marked is_sample.

Set up Google Docs

Add Google Docs → Append Text to Document, connect your Google account, and select the document. Map name, email, phone, and any custom fields into Text to Append.

Test and publish

Test the Google Docs action and publish your Zap. Capture a fresh lead on your site, then confirm that the lead appears in the document.

Use it every day

Fields you get and send

Form Submission returns contact details, custom fields, form name, submission time, agent ID, and conversation ID. Send Prompt requires Message and Agent ID. Model and Conversation ID are optional. Leave Model empty to use the agent’s API channel setting. Map the returned Text into the next step. Reuse the returned Conversation ID to continue the same conversation. Automatic visitor UTM tracking applies to links in the JavaScript website embed. Send Prompt returns response text without the website visitor’s saved campaign parameters.

More workflows

Draft replies to customer emails in Gmail or Outlook, or categorize urgency and topic before creating follow-up tasks.
Add suggested solutions to Jira, Intercom, or Zendesk tickets.
Analyze Typeform or Google Forms feedback for intent, tone, and sentiment, then send summaries to Slack, email, or a spreadsheet.
Create CRM contacts or notify a team channel after a form submission.

The Automations tab has field-mapping guides for these workflows.

Check activity and manage access

The Delivery activity tab shows recent form deliveries. Delivered means Zapier received the event. Open Zap history to check the destination action. Temporary failures retry automatically. Previewing a record does not start a Zap. Turn off a Zap in Zapier to disconnect its trigger. Revoking a key in Centillion Labs stops all its triggers and prompt actions. A delivery already in flight may still finish. Create a new key and reconnect the affected Zaps to resume. Only the connection that owns a conversation can continue it. If a conversation has ended, leave Conversation ID empty to start a new one. Prompt actions use your normal agent rate and credit limits. For retries, the optional Request ID accepts a UUID; reuse it only for the same message in the same conversation.

API reference

The native integration uses https://app.cntillion.com/api/zapier. Every endpoint requires Authorization: Bearer YOUR_ZAPIER_API_KEY. Create the key in Channels → Zapier. It can access only that agent. JSON requests must include Content-Type: application/json and stay within 64 KiB.

Method and path	Request	Response
`GET /me`	No parameters	Connection `id`, display `name`, and `agent_id`. Used to verify authentication.
`GET /agents`	No parameters	Array containing the authorized agent’s `id` and `name`. Used by the Agent ID dropdown.
`GET /submissions`	Required query parameter `agentId`	Up to 10 recent form records, newest first. An agent with no submissions returns one record with `is_sample: true`.
`POST /subscriptions`	JSON containing `agentId` and Zapier’s `targetUrl`	Subscription `id`. Repeating the same connection and URL reuses the subscription.
`DELETE /subscriptions/{id}`	The subscription ID returned when subscribing	`{"success": true}`. Safe to repeat; only this connection’s subscription can be disabled.
`POST /prompt`	JSON containing `agentId`, `message`, and optional fields below	Response `id`, `text`, `conversation_id`, `agent_id`, and `usage`.

Form Submission webhook

Zapier calls /subscriptions when a Zap starts and deletes that subscription when the Zap is turned off. targetUrl must be the HTTPS REST-hook URL supplied by Zapier, with the form https://hooks.zapier.com/hooks/standard/ID/SECRET/. Other hosts, custom ports, credentials, query strings, fragments, and redirects are rejected. Each agent supports up to 50 active subscriptions and 10 active API keys. Capturing a lead, Collect data submission, or custom form queues a POST to each active subscription. The payload has the same shape as /submissions:

{
  "id": "submission_123",
  "agent_id": "agent_123",
  "conversation_id": "conversation_123",
  "submitted_at": "2026-10-05T12:00:00.000Z",
  "form_name": "Collect leads",
  "name": "Alex Morgan",
  "email": "alex@example.com",
  "phone": null,
  "fields": { "company": "Example company" },
  "is_sample": false
}

Contact fields and conversation_id can be null. conversation_id is the same ID that Send Prompt and the developer API return. fields contains the custom form fields. Use id to deduplicate deliveries. Temporary failures retry through the delivery queue. A 410 Gone response disables the subscription; turn the Zap off and on again to subscribe it again. Revoking its API key stops future deliveries and prompt requests.

Send Prompt request

{
  "agentId": "agent_123",
  "message": "How do I change my subscription?"
}

message is required and accepts up to 12,000 characters. agentId is required and must match the API key’s agent.

Optional field	Behavior
`model`	Model ID, up to 100 characters. Leave it out to use the agent’s API channel model.
`conversationId`	Returned conversation ID, up to 100 characters. Leave it out to start a new conversation. Only the same API key can continue a conversation.
`requestId`	UUID for retry protection. Reuse it only for the same message and conversation.

The response uses the agent’s trained knowledge, instructions, and normal credit and rate limits. Requests have a 25-second response budget. An ended or paused conversation cannot receive another prompt.

Errors

Errors return JSON with a human-readable message.

Status	Meaning
`400`	Invalid JSON, fields, agent ID, or webhook URL.
`401`	Missing, invalid, or revoked API key. Reconnect the account.
`404`	Agent, conversation, or endpoint is unavailable to this connection.
`409`	Subscription limit reached, conversation unavailable, or another action is needed before retrying.
`413`	Request body exceeds 64 KiB.
`415`	Send JSON with the correct content type.
`429`	Agent rate or credit limit reached. The response includes `Retry-After: 60`; exhausted credits require a billing change or reset.
`500`	Unexpected server error. Retry the request.
`504`	Response deadline exceeded. Try a shorter prompt or a faster model.

Limits and good to know

Plan. Zapier requires Standard or above.
One agent per key. A key reaches only the agent it was created for. A lost key cannot be shown again.
Counts. Up to 10 active API keys and 50 active subscriptions per agent.
Request size. JSON requests stay within 64 KiB, and a Send Prompt message within 12,000 characters.
Time. Send Prompt has a 25-second response budget. An ended or paused conversation cannot receive another prompt.
Zapier’s own billing. Zapier may charge for premium apps or workflow features. Its billing is separate from Centillion Labs.

Questions

Which plan do I need for Zapier?

Standard or above. Send Prompt also consumes your workspace’s message credits at the chosen model’s rate, including extra model requests used by actions.

Why can’t I find Centillion Labs in Zapier?

If the native app is still private, use the invitation linked on the setup page. A public listing becomes searchable after Zapier approves it. While the invitation is pending you can prepare a key and preview records, but not connect the app.

I lost my API key. Can I see it again?

No. The key is shown once. Create a new key, revoke the old one, and reconnect the Zaps that used it.

Delivery activity says Delivered, but nothing reached my CRM. Why?

Delivered means Zapier received the event. Open Zap history in Zapier to check what the destination action did with it.

Can a Zap continue an earlier conversation?

Yes. Pass the returned Conversation ID in the next Send Prompt. Only the same API key can continue a conversation, and an ended or paused one cannot receive another prompt.

Does testing the trigger send real data?

Test trigger returns up to 10 recent form records. An agent with no submissions returns one example marked is_sample, so capture a real lead first for a useful test. Previewing a record does not start a Zap.

Try it

Create an API key, build a Zap with the Form Submission trigger, and capture a lead from your own site. Then check that it reached the app you chose.

Start free

Start on the Free plan, or take a seven-day trial of a paid plan. Your agent is live on your site in an afternoon.

Book a demo

Fifteen minutes with the team, on your own use case.

Or ask the assistant on this page.

What Centillion is

The product in one page: agents, knowledge, channels and the helpdesk.

Collect data

Choose the details your agent captures and sends to Zapier.

Custom tools

Let the agent call your own systems during a conversation.

Get started

Build your agent

Reach your customers

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Support

Workspace

Guides

API documentation

Helpdesk API

Developer guides

Connect an AI agent to Zapier

What it does

What you need

Set it up

Use it every day

Fields you get and send

More workflows

Check activity and manage access

API reference

Form Submission webhook

Send Prompt request

Errors

Limits and good to know

Questions

Which plan do I need for Zapier?

Why can’t I find Centillion Labs in Zapier?

I lost my API key. Can I see it again?

Delivery activity says Delivered, but nothing reached my CRM. Why?

Can a Zap continue an earlier conversation?

Does testing the trigger send real data?

Try it

Start free

Book a demo

What Centillion is

Collect data

Custom tools

​What it does

​What you need

​Set it up

​Use it every day

​Fields you get and send

​More workflows

​Check activity and manage access

​API reference

​Form Submission webhook

​Send Prompt request

​Errors

​Limits and good to know

​Questions

​Which plan do I need for Zapier?

​Why can’t I find Centillion Labs in Zapier?

​I lost my API key. Can I see it again?

​Delivery activity says Delivered, but nothing reached my CRM. Why?

​Can a Zap continue an earlier conversation?

​Does testing the trigger send real data?

​Try it

Start free

Book a demo

​Related

What Centillion is

Collect data

Custom tools

What it does

What you need

Set it up

Use it every day

Fields you get and send

More workflows

Check activity and manage access

API reference

Form Submission webhook

Send Prompt request

Errors

Limits and good to know

Questions

Which plan do I need for Zapier?

Why can’t I find Centillion Labs in Zapier?

I lost my API key. Can I see it again?

Delivery activity says Delivered, but nothing reached my CRM. Why?

Can a Zap continue an earlier conversation?

Does testing the trigger send real data?

Try it

Related