Delete Chunk

Permanently remove one chunk and subtract it from the document's counts. Deleting does not renumber the remaining chunks, so chunkIndex values stay stable but become non-contiguous. Chunks of a connector-synced document are read-only and a write answers 403 with error.details.code: "CONNECTOR_MANAGED_RESOURCE_READ_ONLY" — change the content at the source and re-sync, or exclude the document from the connector. A document that has not finished processing answers 409; the message names the status it is in. A workspace API key is rejected with 403; use a personal API key.

DELETE/api/v2/knowledge/{knowledgeBaseId}/documents/{documentId}/chunks/{chunkId}

Authorization

apiKey
X-API-Key<token>

Your Sim API key, personal or workspace-scoped. Generate one under Settings, then API Keys. Operations that reject workspace keys say so in their own description.

In: header

Path Parameters

documentId*string

Unique knowledge document identifier.

Length1 <= length
chunkId*string

Unique chunk identifier.

Length1 <= length
knowledgeBaseId*string

Unique knowledge base identifier.

Length1 <= length

Query Parameters

workspaceId*string

Workspace that owns the knowledge base.

Length1 <= length <= 128

Response Body

application/json

application/json

application/json

application/json

application/json

application/json

application/json

application/json

application/json

curl -X DELETE "https://www.sim.ai/api/v2/knowledge/string/documents/string/chunks/string?workspaceId=string" \  -H "X-API-Key: YOUR_API_KEY"
{
  "data": {
    "id": "7c9e6679-7425-40de-944b-e07fc1f90ae7",
    "deleted": true
  }
}
{
  "error": {
    "code": "BAD_REQUEST",
    "message": "Invalid request"
  }
}
{
  "error": {
    "code": "UNAUTHORIZED",
    "message": "API key required"
  }
}
{
  "error": {
    "code": "FORBIDDEN",
    "message": "Insufficient workspace permissions",
    "details": {
      "code": "INSUFFICIENT_WORKSPACE_ROLE"
    }
  }
}
{
  "error": {
    "code": "NOT_FOUND",
    "message": "Not found"
  }
}
{
  "error": {
    "code": "CONFLICT",
    "message": "Upload has already been completed"
  }
}
{
  "error": {
    "code": "RATE_LIMITED",
    "message": "API rate limit exceeded",
    "details": {
      "retryAfter": "2026-01-01T00:00:30.000Z"
    }
  }
}
{
  "error": {
    "code": "INTERNAL_ERROR",
    "message": "Internal server error"
  }
}
{
  "error": {
    "code": "SERVICE_UNAVAILABLE",
    "message": "Service temporarily unavailable"
  }
}