> For the complete documentation index, see [llms.txt](https://docs.platform.softwareone.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.platform.softwareone.com/developer-resources/rest-api/helpdesk-api/chat/add-chat-attachment.md).

# Add chat attachment

## Add attachments to an existing chat entry

> Accepts multipart form data with attachment files.

```json
{"openapi":"3.0.1","info":{"title":"Marketplace API","version":"5.0.5843-g491c2e59"},"servers":[{"url":"https://api.platform.softwareone.com"}],"paths":{"/public/v1/helpdesk/chats/{chatId}/attachments":{"post":{"tags":["ChatAttachment"],"summary":"Add attachments to an existing chat entry","description":"Accepts multipart form data with attachment files.","parameters":[{"name":"chatId","in":"path","description":"The chat ID.","required":true,"schema":{"type":"string"}},{"name":"attachment","in":"query","description":"Attachment field in JSON format representing the attachment data","schema":{"allOf":[{"$ref":"#/components/schemas/ChatAttachmentDelta"}]}}],"requestBody":{"content":{"multipart/form-data":{"schema":{"$ref":"#/components/schemas/ChatAttachment"},"encoding":{"file":{"style":"form"}}}}},"responses":{"201":{"description":"Created","content":{"application/json":{"schema":{"$ref":"#/components/schemas/ChatAttachment"}}}},"400":{"description":"Bad Request","content":{"application/json":{"schema":{"$ref":"#/components/schemas/ProblemDetails"}}}},"403":{"description":"Forbidden","content":{"application/json":{"schema":{"$ref":"#/components/schemas/ProblemDetails"}}}},"500":{"description":"Internal Server Error"}}}}},"components":{"schemas":{"ChatAttachmentDelta":{"type":"object","properties":{"node":{"allOf":[{"$ref":"#/components/schemas/DeltaNode"}],"nullable":true},"path":{"type":"string"},"data":{"allOf":[{"$ref":"#/components/schemas/ChatAttachment"}],"nullable":true,"readOnly":true},"isDefined":{"type":"boolean","readOnly":true}},"additionalProperties":false},"DeltaNode":{"type":"object","properties":{"name":{"type":"string"},"children":{"type":"array","items":{"$ref":"#/components/schemas/DeltaNode"},"readOnly":true}},"additionalProperties":false},"ChatAttachment":{"type":"object","properties":{"id":{"type":"string"},"audit":{"allOf":[{"$ref":"#/components/schemas/ChatAttachmentAudit"}]},"$meta":{"allOf":[{"$ref":"#/components/schemas/PlatformMetadata"}],"nullable":true},"name":{"type":"string"},"icon":{"type":"string","nullable":true},"revision":{"type":"integer","format":"int32"},"chat":{"type":"object","allOf":[{"$ref":"#/components/schemas/ChatRef"}]},"description":{"type":"string","nullable":true},"status":{"allOf":[{"$ref":"#/components/schemas/FileStatus"}]},"file":{"allOf":[{"$ref":"#/components/schemas/File"}],"description":"Represents the file this attachment belongs to."}},"additionalProperties":false},"ChatAttachmentAudit":{"type":"object","properties":{"created":{"allOf":[{"$ref":"#/components/schemas/PlatformObjectEvent"}],"nullable":true},"updated":{"allOf":[{"$ref":"#/components/schemas/PlatformObjectEvent"}],"nullable":true},"deleted":{"allOf":[{"$ref":"#/components/schemas/PlatformObjectEvent"}],"nullable":true}},"additionalProperties":false},"PlatformObjectEvent":{"type":"object","properties":{"at":{"type":"string","format":"date-time","nullable":true},"by":{"type":"object","allOf":[{"$ref":"#/components/schemas/PlatformIdentityRef"}]}},"additionalProperties":false},"PlatformIdentityRef":{"type":"object","properties":{"id":{"type":"string"},"name":{"type":"string"},"icon":{"type":"string","nullable":true},"revision":{"type":"integer","format":"int32"}},"additionalProperties":false},"PlatformMetadata":{"type":"object","properties":{"omitted":{"type":"array","items":{"type":"string"}}},"additionalProperties":false},"ChatRef":{"type":"object","properties":{"id":{"type":"string"},"name":{"type":"string"},"icon":{"type":"string","nullable":true},"revision":{"type":"integer","format":"int32"},"type":{"allOf":[{"$ref":"#/components/schemas/ChatType"}],"description":"Represents the type of chat, indicating whether it is a direct message, group chat, channel, or support case."}},"additionalProperties":false},"ChatType":{"enum":["Direct","Group","Channel","Case"],"type":"string"},"FileStatus":{"enum":["Active","Deleted"],"type":"string"},"File":{"type":"object","properties":{"id":{"type":"string"},"audit":{"allOf":[{"$ref":"#/components/schemas/PlatformObjectAudit"}]},"$meta":{"allOf":[{"$ref":"#/components/schemas/PlatformMetadata"}],"nullable":true},"name":{"type":"string"},"icon":{"type":"string","nullable":true},"revision":{"type":"integer","format":"int32"},"type":{"allOf":[{"$ref":"#/components/schemas/FileType"}],"description":"Specifies the type of the file, such as attachment or icon"},"filename":{"type":"string","description":"Represents the name of the file associated with the attachment."},"size":{"type":"integer","description":"Indicates the size of the file in bytes.","format":"int64","nullable":true},"contentType":{"type":"string","description":"Represents the MIME type of the file content."}},"additionalProperties":false,"description":"Represents a file in the helpdesk module"},"PlatformObjectAudit":{"type":"object","properties":{"created":{"allOf":[{"$ref":"#/components/schemas/PlatformObjectEvent"}],"nullable":true},"updated":{"allOf":[{"$ref":"#/components/schemas/PlatformObjectEvent"}],"nullable":true}},"additionalProperties":false},"FileType":{"enum":["Attachment","Icon","Image","Video"],"type":"string"},"ProblemDetails":{"type":"object","properties":{"type":{"type":"string","nullable":true},"title":{"type":"string","nullable":true},"status":{"type":"integer","format":"int32","nullable":true},"detail":{"type":"string","nullable":true},"instance":{"type":"string","nullable":true}},"additionalProperties":{}}}}}
```


---

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