iMessage Outreach Automation API

what linkupapi allow you to do

Buying signals detection

Detect intent signals like funding rounds, hiring activity, and company growth. Reach prospects at the perfect moment with real-time alerts.

Multi B2B channel

Reach prospects across LinkedIn, WhatsApp, iMessage, email, and web. Manage all B2B channels through one unified API platform.

Multi-source data

Aggregate information from dozens of public sources. Get the most complete profiles by combining data from multiple sources.

App integrations

Connect with your favorite tools through native integrations. Compatible with Make, n8n, Zapier, and any platform via REST API.

Compliance first

Never store credentials or post-login data. EU-hosted, GDPR and CCPA compliant, with a data processing agreement on request.

Scalability

Handle millions of requests without performance degradation. Our infrastructure scales automatically to match your growth and usage patterns.

// What it does

Send an iMessage to a phone number from a dedicated line, follow up when there is no answer, and get every reply through a webhook. Same key and same body shape as LinkedIn, email and WhatsApp, with no Mac to run on your side.

// Three workflows teams ship with it

Use case · Multi-channel sequence

The step after LinkedIn and email

No reply on LinkedIn, no answer by email: the sequence continues on iMessage with the same context, then stops on reply.

LinkedIn · day 0, Email · day 5, iMessage · day 9

iMessage API

Use case · Inbound follow-up

Answer a lead where they already are

A form gives you a phone number: your product sends a plain-text iMessage within a minute and hands the thread to a human on reply.

Form received, iMessage sent · 40 s, Reply · rep notified

WhatsApp outreach

Use case · AI agent

An agent that picks the channel

Through the API, the agent reads the conversation history and chooses LinkedIn, email, WhatsApp or iMessage for the next message, within each line's limits.

History read, Channel chosen, Message sent

LinkedIn automation API

// Two calls, one sequence

1import requests
2
3# Send an iMessage from a dedicated line (account_id = your iMessage line)
4response = requests.post(
5    "https://api.linkupapi.com/v2/messages",
6    headers={"x-api-key": "YOUR_API_KEY"},
7    json={
8        "account_id": "YOUR_IMESSAGE_ACCOUNT_ID",
9        "action": "send",
10        "params": {
11            "phone_number": "+13231112233",
12            "message_text": "Hi Jane, following up on my email about your outbound stack. Worth 15 minutes next week?"
13        }
14    }
15)
16
17print(response.json())

Jane Doe

+1 323 111 2233 · iMessage

iMessage delivered
Tapback received
Reply received · webhook delivered

// How it compares

// SECURITY & COMPLIANCE

Privacy and security with no compromise.

Your users trust you with their accounts. Here is how we keep them safe.

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Passwords never stored

We never keep your users' passwords. Sessions are encrypted, isolated per account and revocable at any time.

EU-hosted, GDPR & CCPA

Data is processed and hosted in the European Union. GDPR and CCPA compliant, with a data processing agreement on request.

Google-verified security

LinkupAPI passed Google's CASA security assessment and is a verified Gmail app. Same review, same standards for every channel.

New signal detected

+100 ready to use automated actions

Enterprise-grade security measures ensuring your data remains protected at every step of the process.

Frequently asked questions.

LinkupAPI V2 - See what’s new

LinkedIn, email, WhatsApp and iMessage through one API. Unlimited accounts, one fixed price.

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50

+

Endpoints

99.9

%

Uptime

< 3

s

Avg Response