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Use this flow when a customer needs to provide files such as passport scans, utility bills, or corporate documents for an incorporation. Incorporation documents are built from reusable Commenda OS files. The file upload endpoint lives in the Commenda OS Partner API because files can be reused outside incorporation for KYC, entity records, registrations, and customer file attachments. The Incorporation API takes the resulting fileId and assigns it to a participant document slot.

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Flow

  1. Upload the file with Upload a file, sending the bytes as multipart/form-data. Save the returned file.fileId.
  2. Upsert the fileId into a participant document slot with Upsert a participant document.

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Endpoint map

StepEndpointAPI surfaceOutput
Upload filePOST /partner/commenda-os/customers/{customerId}/filesCommenda OS Partner APIfile.fileId
Upsert typed participant documentPUT /partner/incorporation/{incorporationId}/participants/{participantId}/documents/{documentKind}Partner Incorporation APIdocument.documentId

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Important handoffs

  • The upload endpoint accepts only a file multipart part. It returns a fileId and nothing else — any metadata set by future attach calls is layered on top of the underlying file.
  • Use file.fileId when upserting incorporation participant documents. The upsert assigns the file to the participant document slot.
  • Uploads are capped at 100 MB per request, must use one of the accepted MIME types, and time out after 120 seconds. See Upload a file for the full limits and error codes. Contact Commenda if you need to upload files larger than 100 MB.