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POST
Reply to an open comment thread. Resolved threads must be re-opened first.

Authorizations

Authorization
string
header
required

Bearer authentication header of the form Bearer <token>, where <token> is your auth token.

Headers

Replo-Api-Version
enum<string>
required

The public API version to use for this request.

Available options:
2026-10-05

Path Parameters

threadId
string<uuid>
required

Body

application/json
body
string
required

Markdown (GFM) parsed as MDX. To mention someone, insert <Mention data='<mentionable JSON>' />. Expressions in braces, raw HTML and any other JSX are rejected, so escape a literal { or < with a backslash. Images must be hosted on assets.replocdn.com.

Minimum string length: 1
id
string<uuid>

Client-generated comment id; a retry with the same id is safe.

Response

Reply to an open comment thread. Resolved threads must be re-opened first.

object
enum<string>
required
Available options:
comment
id
string<uuid>
required
threadId
string<uuid>
required
author
object
required
source
enum<string>
required

How the comment was written: ui (the Replo app), agent (a Replo agent session), mcp or api.

Available options:
ui,
agent,
mcp,
api
body
string
required

Markdown (MDX) written by the commenter, who may be outside the workspace. Mentions this API key can't read appear as <RedactedMention category="…" />. Empty when the comment is deleted.

createdAt
string<date-time>
required
editedAt
string<date-time> | null
required
deleted
boolean
required