Docs / Messages

`get_message_attachment`

Download one file attached to a message.

This action only reads. It changes nothing, so it is safe to try.

What you give it

Input	What it is	Where to get it
`messageId` needed	A message id. The message id (from list_chat_messages).	Run `list_chat_messages` and use `messages[].id` from its answer. 7 more places to get it `list_messages` → `messages[].id` `get_chat` → `lastMessage.id` `get_message` → `id` `list_attendee_messages` → `messages[].id` `send_message` → `messageId` `send_chat_message` → `messageId` `start_conversation` → `messageId`
`attachmentId` needed	A attachment id. The attachment id (from the message's attachments).	Run `list_chat_messages` and use `messages[].attachments[].id` from its answer. 3 more places to get it `list_messages` → `messages[].attachments[].id` `get_message` → `attachments[].id` `list_attendee_messages` → `messages[].attachments[].id`
`connectionId` optional	A connection id. Which of your LinkedIn accounts to act from (its id from list_linkedin_accounts). Omit to use your first live one.	Run `list_linkedin_accounts` and use `accounts[].id` from its answer. 15 more places to get it `get_my_profile` → `accounts[].connectionId` `list_connections` → `connections[].connectionId` `list_connections` → `summary.accounts[].connectionId` `list_sent_invitations` → `pendingInvitations[].connectionId` `preview_withdraw_invitations` → `breakdown[].linkedinConnectionId` `list_conversations` → `inbox[].linkedinConnectionId` `list_inmail` → `inmail[].connectionId` `get_inmail_credits` → `accounts[].connectionId` `list_sales_navigator_contracts` → `accounts[].connectionId` `who_is_waiting_on_me` → `waitingOnYou[].connectionId` `who_went_cold` → `coldConversations[].connectionId` `connections_never_messaged` → `summary.accounts[].connectionId` `get_usage` → `connectionId` `get_conversation` → `connectionId` `get_inmail_conversation` → `connectionId`

Call it

curl -X POST https://api.heyreagent.com/v1/actions/get_message_attachment \
  -H "Authorization: Bearer YOUR_KEY" \
  -H "content-type: application/json" \
  -d '{"messageId":"PASTE_MESSAGE_ID_HERE","attachmentId":"PASTE_ATTACHMENT_ID_HERE"}'

The same call in JavaScript

const response = await fetch("https://api.heyreagent.com/v1/actions/get_message_attachment", {
  method: "POST",
  headers: {
    "Authorization": "Bearer YOUR_KEY",
    "content-type": "application/json",
  },
  body: JSON.stringify({
    "messageId": "PASTE_MESSAGE_ID_HERE",
    "attachmentId": "PASTE_ATTACHMENT_ID_HERE"
  }),
});
const answer = await response.json();
console.log(answer);

The same call in Python

import requests

response = requests.post(
    "https://api.heyreagent.com/v1/actions/get_message_attachment",
    headers={"Authorization": "Bearer YOUR_KEY"},
    json={
        "messageId": "PASTE_MESSAGE_ID_HERE",
        "attachmentId": "PASTE_ATTACHMENT_ID_HERE",
    },
)
print(response.json())

The same call in n8n

Add an HTTP Request node and fill it in like this:

Method	`POST`
URL	`https://api.heyreagent.com/v1/actions/get_message_attachment`
Send Headers	On. Name `Authorization`, Value `Bearer YOUR_KEY`
Send Body	On. Body Content Type `JSON`, Specify Body `Using JSON`, then paste the body below

{
  "messageId": "PASTE_MESSAGE_ID_HERE",
  "attachmentId": "PASTE_ATTACHMENT_ID_HERE"
}

Put your own key where it says YOUR_KEY. Put your own value where it says PASTE_…_HERE: the table above says where each one comes from. New here? Start with your first call.

What you get back

When it worked, the answer is { "ok": true, "result": { … } }. The file is in result.file, as { contentType, base64 }.

When it did not work, the answer is { "ok": false, "error": "…", "message": "…" }. What each error means.

Good to know

Files over 5 MB are not returned.

In Claude or ChatGPT

Once connected, ask in your own words. The assistant sees this action as a tool with the same name, get_message_attachment, and the same inputs.