attachment

Get a presigned R2 upload URL for an attachment

post/api/preview/attachments/presign

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/presign/post.ts
A function with typed inputs. Its response is checked against the schema.

capsuleIdstring required

UUID v4 string

contentTypestring required

MIME type from the upload form.

fileNamestring required

Original file name. Sanitized server-side before object-key construction.

fileSizeinteger required

Size in bytes. Validated against per-plan caps server-side.

Successful response

objectKeystring required

uploadUrlstring required

No recorded changes to this operation across all 8 revisions of this API.