Send LinkedIn Messages and InMail via API

// OVERVIEW

What it does

Send a direct message to a LinkedIn connection or open profile, the first message after an accepted invitation, or a follow-up.

Set InMail to send a paid InMail that reaches people outside your network, which requires a subject and a Premium or Sales Navigator allowance.

Available in n8n, MCP, and REST.

// PARAMETERS

Inputs

Name	Type	Required	Description
`profileId`	string	Required	Connected LinkedIn profile sending the message.
`recipientId`	string	Required	The internal ID of the person, from a People search result, Get Profile, or Get Connections.
`text`	string	Required	The message body, up to 10000 characters.
`inmail`	boolean	Optional	Send a paid InMail instead of a regular message.
`subject`	string	Optional	InMail subject, up to 200 characters. Required when inmail is true.

// OUTPUT SHAPE

Example JSON output

{
  "conversation_id": "conv_01H...",
  "message_id": "msg_01H...",
  "new_conversation": true
}

// INVOCATION

How to call

Resource: MessageOperation: Send

POST/v1/actions/send-message/v1

curl -X POST https://actions.periodix.net/api/v1/actions/send-message/v1 \
  -H "Authorization: Bearer YOUR_API_KEY" -H "Content-Type: application/json" \
  -d '{ "profileId": "prf_01H...", "recipientId": "ACoAA...", "text": "Hi Jane, thanks for connecting ..." }'

Example response

{
  "conversation_id": "conv_01H...",
  "message_id": "msg_01H...",
  "new_conversation": true
}

// CONSTRAINTS

Limits & status

Subject to safe daily message limits you control. InMail requires a Premium or Sales Navigator allowance.

// USED IN

Playbooks using this Action

Not yet used in a published playbook.

// GET STARTED

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