Gallery Platform API
Reference

Reply to an inbox thread

Sends a reply on the thread as the signed-in member's own connected mailbox (Gmail), threading it onto the conversation, and records the outbound message. Mail leaves the building and cannot be unsent. Member-private — first-party (session) only.

POST
/gallery/inbox/threads/{id}/reply

Sends a reply on the thread as the signed-in member's own connected mailbox (Gmail), threading it onto the conversation, and records the outbound message. Mail leaves the building and cannot be unsent. Member-private — first-party (session) only.

Authorization

bearerAuth inbox:create
AuthorizationBearer <token>

A gallery API key, sent as Authorization: Bearer gpk_… (or the x-api-key header).

In: header

Scope: inbox:create

Path Parameters

id*string

Header Parameters

Idempotency-Key?string

Optional. Send a unique key per logical operation to make retries safe: a retry with the same key replays the stored success for 14 days instead of re-running the write. Reusing a key with a different body returns 400.

Request Body

application/json

TypeScript Definitions

Use the request body type in TypeScript.

Reply to a thread, delivered via the member's connected channel.

Response Body

application/json

application/problem+json

application/problem+json

application/problem+json

application/problem+json

application/problem+json

application/problem+json

{  "id": "string",  "thread_id": "string",  "channel": "email",  "direction": "inbound",  "provider_message_id": "string",  "in_reply_to": "string",  "from_handle": "string",  "to_handles": [    "string"  ],  "body_text": "string",  "body_html": "string",  "occurred_at": "string",  "read_at": "string",  "has_attachments": true,  "created_at": "string"}