Read messages in a conversation

Read messages in one thread, most-recent first.

URL-encode the path parameter

conversationUrn contains parens and colons — both are reserved characters in URL paths. Always wrap in encodeURIComponent() before constructing the URL:

const encoded = encodeURIComponent(conv.conversationUrn);
const r = await fetch(`/v1/linkedin/conversations/${encoded}/messages?sessionId=${sessionId}`);

Response shape

Unlike GET /linkedin/conversations, this endpoint does return senderName and senderSlug for most messages — LinkedIn embeds the sender's display data in the message payload. They're still nullable for system-generated messages (e.g. "X joined the conversation"), so guard before rendering.

Field map (exact names, camelCase):

• messageUrn — urn:li:msg_message:(…). Stable identifier for reaction / attachment lookups.
• text — Plain text body. Empty string for attachment- only messages (check attachmentCount > 0).
• senderUrn — Profile URN. Null only on system messages.
• senderName — Display name; usually "First Last". Nullable.
• senderSlug — linkedin.com/in/<slug> segment. Nullable. Useful when you want to build a profile URL without a separate lookup.
• isFromViewer — true when sent by the authenticated session holder. Use this for left/right bubble layout.
• deliveredAt — Unix ms (not seconds). Nullable.

Worked example response

{
  "ok": true,
  "conversationUrn": "urn:li:msg_conversation:(urn:li:fsd_profile:ACoAAA…,2-MWE…)",
  "messages": [
    {
      "messageUrn": "urn:li:msg_message:(urn:li:fsd_profile:ACoAAA…,2-MWE…)",
      "conversationUrn": "urn:li:msg_conversation:(urn:li:fsd_profile:ACoAAA…,2-MWE…)",
      "text": "Sure, happy to chat — Tuesday at 2pm work?",
      "deliveredAt": 1715990400000,
      "senderUrn": "urn:li:fsd_profile:ACoAAA…aaaa",
      "senderName": "Jane Doe",
      "senderSlug": "jane-doe-1a2b3c",
      "attachmentCount": 0,
      "reactionCount": 0,
      "isFromViewer": false
    },
    {
      "messageUrn": "urn:li:msg_message:(urn:li:fsd_profile:ACoAAA…,2-XYZ…)",
      "conversationUrn": "urn:li:msg_conversation:(urn:li:fsd_profile:ACoAAA…,2-MWE…)",
      "text": "Hey Jane — quick one about your team's cold outbound setup. Got 5 minutes this week?",
      "deliveredAt": 1715986800000,
      "senderUrn": "urn:li:fsd_profile:ACoAAA…me",
      "senderName": "Me",
      "senderSlug": "me-1a2b3c",
      "attachmentCount": 0,
      "reactionCount": 0,
      "isFromViewer": true
    }
  ]
}