Update Chunk

Correct a chunk's text or take it out of search. Changing content re-embeds the chunk and re-derives the document's token and character counts, so the correction reaches search immediately; disabling keeps the chunk indexed. 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.

PATCH/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

Request Body

application/json

Workspace scope and the fields to update. At least one is required.

TypeScript Definitions

Use the request body type in TypeScript.

Response Body

application/json

application/json

application/json

application/json

application/json

application/json

application/json

application/json

application/json

application/json

application/json

curl -X PATCH "https://www.sim.ai/api/v2/knowledge/string/documents/string/chunks/string" \  -H "X-API-Key: YOUR_API_KEY" \  -H "Content-Type: application/json" \  -d '{    "workspaceId": "a91c4b2e-6d3f-4e8a-b5c7-0d9e2f1a8c64",    "enabled": false  }'
{
  "data": {
    "id": "4c1f9e77-2b3a-4f8d-9e10-6a2c8d4b1e05",
    "chunkIndex": 3,
    "content": "To reset your password, open Settings and choose Security.",
    "contentLength": 58,
    "tokenCount": 14,
    "enabled": true,
    "startOffset": 0,
    "endOffset": 0,
    "tag1": "string",
    "tag2": "string",
    "tag3": "string",
    "tag4": "string",
    "tag5": "string",
    "tag6": "string",
    "tag7": "string",
    "createdAt": "2019-08-24T14:15:22Z",
    "updatedAt": "2019-08-24T14:15:22Z"
  }
}
{
  "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": "PAYLOAD_TOO_LARGE",
    "message": "Request body is too large"
  }
}
{
  "error": {
    "code": "UNSUPPORTED_MEDIA_TYPE",
    "message": "Request body must be sent as application/json"
  }
}
{
  "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"
  }
}
PATCHUpdate Knowledge BasePATCHUpdate Knowledge Connector