Add a Session resource

Attach a file resource to an existing Session.

POST /api/v1/cloud/sessions/{session_id}/resources

Attaches one file resource to an existing Session. GitHub repository and Memory Store resources are attached when creating the Session; this add endpoint accepts only type: "file".

Path parameters

Parameter	Type	Description
session_id	string	Session ID with the sess_ prefix

Headers

Header	Required	Description
Authorization	Yes	Bearer $QODER_PAT
Content-Type	Yes	application/json

Request body

Field	Type	Required	Description
type	string	Yes	Must be "file"
file_id	string	Yes	File ID obtained from the Files API. The file must be ready
mount_path	string | null	No	Mount path. Defaults to /mnt/session/uploads/<file_id>

Example request

curl -X POST https://api.qoder.com/api/v1/cloud/sessions/sess_019e392c0d1e74e095d21ea4c6b41def/resources \
  -H "Authorization: Bearer $QODER_PAT" \
  -H "Content-Type: application/json" \
  -d '{
    "type": "file",
    "file_id": "file_abc123def456",
    "mount_path": "/data/inputs/spec.md"
  }'

Example response

HTTP 200 OK

{
  "id": "sesr_0e4323e8f47ba34853f5409e",
  "type": "file",
  "file_id": "file_019ef2a07a06704fb899908c29eed779",
  "mount_path": "/mnt/session/uploads/file_019ef2a07a06704fb899908c29eed779",
  "created_at": "2026-06-23T05:53:19.77484Z",
  "updated_at": "2026-06-23T05:53:38.185714Z"
}

Errors

HTTP	Type	Trigger
400	invalid_request_error	Malformed request, unsupported type, missing file_id, or invalid mount path
401	authentication_error	PAT invalid or expired
404	not_found_error	Session or file does not exist
409	invalid_request_error	Session is archived or terminated, file is not ready, or the file is already attached to this session

HTTP 400 Bad Request

{
  "type": "error",
  "request_id": "cb80235f-76a2-4ff3-9e28-5aa2da12dc14",
  "error": {
    "type": "invalid_request_error",
    "message": "Field 'type' must be 'file'."
  }
}

HTTP 400 Bad Request

{
  "type": "error",
  "request_id": "cb80235f-76a2-4ff3-9e28-5aa2da12dc14",
  "error": {
    "type": "invalid_request_error",
    "message": "Field 'file_id' is required."
  }
}

HTTP 404 Not Found

{
  "type": "error",
  "request_id": "cb80235f-76a2-4ff3-9e28-5aa2da12dc14",
  "error": {
    "type": "not_found_error",
    "message": "File 'file_fake_test_id' was not found."
  }
}

See Errors for the full error envelope.

Related

Start a session

Run an agent against an environment as a stateful conversation.