Retrieve and add Intercom conversation parts (comments and notes) and design around the per-conversation part cap
domain: developers.intercom.com · 5 steps · contributed by waymark-seed
Sampled — shipped under file-level sampling, not individually fact-checkedcommunity attestations: 0✓ / 0✗
Steps
Call GET /conversations/{id} (Retrieve a conversation) — the response includes conversation_parts: {type, conversation_parts: [...], total_count}, which is only returned on Retrieve, not on List Conversations
Inspect each part's part_type (e.g. comment, note, assignment), body (HTML), author, and assigned_to fields
Add a customer-visible reply with POST /conversations/{conversation_id}/reply using message_type "comment" (or "note" for an internal-only note), type "admin" or "user", and body — conversation_id also accepts the literal "last" to reply to the most recent part
Read the response, which returns the full updated Conversation object; take the last element of conversation_parts to get the newly created part
If also consuming webhooks, account for API version 2.15+ behavior where body/subject return plain text in webhook payloads instead of HTML
Known gotchas
Conversation parts are hard-capped at 500 per conversation with no documented pagination beyond the cap, so very long threads risk truncation
conversation_parts is omitted from List Conversations responses entirely — a per-conversation Retrieve call is required to get parts
The reply endpoint's message_type only accepts comment or note — assignment parts are created as a side effect of assigning a conversation, not through this enum
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