attachment

Register an uploaded attachment after R2 verification

post/api/preview/attachments/confirm

Request

Base URL
https://symbol.chat (the document declares no server; this is the origin it was published from)
Auth
- HTTP bearer
- or API key in cookie __Secure-next-auth.session-token
- or OAuth 2
  Authorization codehttps://mcp.symbol.chat/authorize
  Token URLhttps://mcp.symbol.chat/token
TypeScript
https://skmtc.dev/symbol-chat/apis/symbol-api/docs/api/preview/attachments/confirm/post.ts
A function with typed inputs. Its response is checked against the schema.

capsuleIdstring required

UUID v4 string

fileNamestring required

Original file name; persisted on the row for display.

objectKeystring required

Canonical R2 object key returned from the presign endpoint. Server verifies the prefix matches <userId>/<capsuleId>/ before insert.

Successful response

availableboolean

capsule_idstring nullable

capsule_updated_atstring nullable

Upload confirm only: the capsule's new updated_at when the upload rewrote a file-name embed in its body; null when the body was not changed.

created_atstring

deleted_atstring nullable

embed_markdownstring

Markdown that places this file in a capsule body. Credential-free and durable, unlike any ?cat= URL.

expires_atstring nullable

file_namestring

heightinteger nullable

idstring

mime_typestring

object_keystring

rotation_base_keystring nullable

rotation_base_sizeinteger nullable

rotation_degreesinteger nullable

sizeinteger

unavailable_atstring nullable

unavailable_reasonstring nullable

widthinteger nullable

Oct 10, 2026c7729725d527 Revision changes
- info
  added the optional property to the response with the status
- info
  added the optional property to the response with the status
Sep 30, 20266a95af57f0f6 Revision changes
- info
  added the optional property to the response with the status
- info
  added the optional property to the response with the status
- info
  added the optional property to the response with the status
- info
  added the optional property to the response with the status
- info
  added the optional property to the response with the status
- info
  added the optional property to the response with the status