Get Chunk - Dify Docs

get/knowledge-fs/spaces/{knowledge_base_id}/documents/{document_id}/revisions/{revision}/chunks/{chunk_id}

Request example

curl --request GET \
  --url https://api.dify.ai/v1/knowledge-fs/spaces/{knowledge_base_id}/documents/{document_id}/revisions/{revision}/chunks/{chunk_id} \
  --header 'Authorization: Bearer <token>'

import requests

url = "https://api.dify.ai/v1/knowledge-fs/spaces/{knowledge_base_id}/documents/{document_id}/revisions/{revision}/chunks/{chunk_id}"
headers = {
    "Authorization": "Bearer <token>",
}

response = requests.request("GET", url, headers=headers)

print(response.text)

const response = await fetch('https://api.dify.ai/v1/knowledge-fs/spaces/{knowledge_base_id}/documents/{document_id}/revisions/{revision}/chunks/{chunk_id}', {
  method: 'GET',
  headers: {
    'Authorization': 'Bearer <token>'
  }
});

const data = await response.json();
console.log(data);

<?php

$curl = curl_init();

curl_setopt_array($curl, [
  CURLOPT_URL => 'https://api.dify.ai/v1/knowledge-fs/spaces/{knowledge_base_id}/documents/{document_id}/revisions/{revision}/chunks/{chunk_id}',
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_CUSTOMREQUEST => 'GET',
  CURLOPT_HTTPHEADER => [
    'Authorization: Bearer <token>',
  ],
]);

$response = curl_exec($curl);
curl_close($curl);

echo $response;

package main

import (
	"fmt"
	"io"
	"net/http"
)

func main() {
	url := "https://api.dify.ai/v1/knowledge-fs/spaces/{knowledge_base_id}/documents/{document_id}/revisions/{revision}/chunks/{chunk_id}"

	req, _ := http.NewRequest("GET", url, nil)
	req.Header.Add("Authorization", "Bearer <token>")

	res, _ := http.DefaultClient.Do(req)
	defer res.Body.Close()
	body, _ := io.ReadAll(res.Body)

	fmt.Println(string(body))
}

HttpRequest request = HttpRequest.newBuilder()
    .uri(URI.create("https://api.dify.ai/v1/knowledge-fs/spaces/{knowledge_base_id}/documents/{document_id}/revisions/{revision}/chunks/{chunk_id}"))
    .header("Authorization", "Bearer <token>")
    .method("GET", HttpRequest.BodyPublishers.noBody())
    .build();

HttpResponse<String> response = HttpClient.newHttpClient()
    .send(request, HttpResponse.BodyHandlers.ofString());

System.out.println(response.body());

require 'uri'
require 'net/http'

url = URI('https://api.dify.ai/v1/knowledge-fs/spaces/{knowledge_base_id}/documents/{document_id}/revisions/{revision}/chunks/{chunk_id}')

http = Net::HTTP.new(url.host, url.port)
http.use_ssl = url.scheme == 'https'

request = Net::HTTP::Get.new(url)
request['Authorization'] = 'Bearer <token>'

response = http.request(request)
puts response.read_body

Response

{
  "created_at": "2026-09-03T10:04:30Z",
  "document_id": "3d2f1c0b-9a8e-4d7c-b6a5-4f3e2d1c0b9a",
  "document_revision": 2,
  "enabled": true,
  "end_offset": 5120,
  "id": "7a6b5c4d-3e2f-4a1b-9c8d-7e6f5a4b3c2d",
  "kind": "chunk",
  "knowledge_space_id": "9b2e5b7a-3c1d-4e2f-8a9b-1c2d3e4f5a6b",
  "ordinal": 14,
  "parent_chunk_id": null,
  "parse_element_ids": [
    "el-40",
    "el-41"
  ],
  "section_path": [
    "3 Employment",
    "3.4 Termination"
  ],
  "start_offset": 4600,
  "text": "Either party may terminate this agreement with thirty days' written notice.",
  "token_count": 131,
  "user_metadata": {}
}

{
  "code": "knowledge_fs_invalid_request",
  "failure": {
    "category": "validation",
    "code": "KNOWLEDGE_FS_INVALID_REQUEST",
    "message": "The Agent Knowledge Base request is invalid.",
    "retryPolicy": "never",
    "traceId": "7f3c1a90-2e64-4b7d-8a51-6c0d9e2f4b83"
  },
  "message": "The Agent Knowledge Base request is invalid.",
  "status": 400
}

{
  "code": "knowledge_fs_invalid_request",
  "message": "Agent Knowledge Base request is invalid.",
  "status": 400
}

{
  "code": "knowledge_fs_invalid_credential",
  "message": "Invalid Agent Knowledge Base service credential.",
  "status": 401
}

{
  "code": "unauthorized",
  "message": "Access token is invalid",
  "status": 401
}

{
  "code": "forbidden",
  "message": "Sorry, you have reached the knowledge base request rate limit of your subscription.",
  "status": 403
}

{
  "code": "knowledge_fs_access_denied",
  "message": "Agent Knowledge Base operation is not allowed.",
  "status": 403
}

{
  "code": "knowledge_fs_resource_not_found",
  "failure": {
    "category": "not_found",
    "code": "KNOWLEDGE_FS_NOT_FOUND",
    "message": "The requested Agent Knowledge Base resource was not found.",
    "retryPolicy": "never",
    "traceId": "7f3c1a90-2e64-4b7d-8a51-6c0d9e2f4b83"
  },
  "message": "The requested Agent Knowledge Base resource was not found.",
  "status": 404
}

{
  "code": "not_found",
  "message": "The requested URL was not found on the server. If you entered the URL manually please check your spelling and try again.",
  "status": 404
}

{
  "code": "knowledge_fs_upstream_unavailable",
  "failure": {
    "action": "contact_admin",
    "category": "internal",
    "code": "KNOWLEDGE_FS_INTERNAL_ERROR",
    "message": "Agent Knowledge Base could not complete the operation. Try again, or contact an administrator with the error reference.",
    "retryPolicy": "manual",
    "traceId": "5e2a9c17-3b4d-4f60-8a1b-2c3d4e5f6a7b"
  },
  "message": "Agent Knowledge Base could not complete the operation. Try again, or contact an administrator with the error reference.",
  "status": 502
}

{
  "code": "knowledge_fs_upstream_unavailable",
  "message": "Agent Knowledge Base is unavailable.",
  "status": 502
}

{
  "code": "knowledge_fs_operation_unavailable",
  "message": "Agent Knowledge Base operation is not available.",
  "status": 503
}

{
  "code": "knowledge_fs_operation_unavailable",
  "failure": {
    "action": "retry",
    "category": "dependency",
    "code": "KNOWLEDGE_FS_UNAVAILABLE",
    "message": "A service required by Agent Knowledge Base is temporarily unavailable.",
    "retryPolicy": "manual",
    "traceId": "5e2a9c17-3b4d-4f60-8a1b-2c3d4e5f6a7b"
  },
  "message": "A service required by Agent Knowledge Base is temporarily unavailable.",
  "status": 503
}

get/knowledge-fs/spaces/{knowledge_base_id}/documents/{document_id}/revisions/{revision}/chunks/{chunk_id}

Authorization

Authorizationstringheaderrequired#

Every request authenticates with an API key: Authorization: Bearer {API_KEY}. App endpoints take an app API key; knowledge endpoints take a knowledge base API key (Get Started).

Keep keys server-side; never embed them in client code. Requests with a missing or invalid key fail with HTTP 401 (unauthorized).

Path parameters

knowledge_base_idstringrequired#

Knowledge base ID: the last segment of the Service API endpoint shown in the knowledge base's API Access dialog (…/knowledge-fs/spaces/<knowledge base ID>), and the segment after /datasets/new/ in the address bar.

document_idstringrequired#

The document ID, from List Documents or from the address bar of the open document (/datasets/new/<knowledge base ID>/documents/<document ID>).

revisionintegerrequired#

Revision number. From List Document Revisions.

Range: >= 1

chunk_idstringrequired#

Chunk ID. From List Chunks.

Responses

application/json

The chunk.

created_atstring#

When the chunk was created, ISO 8601.

document_idstring#

Document ID: the id of Get Document.

document_revisioninteger#

Revision the chunk belongs to. Each revision has its own chunks. A chunk ID is addressable only through its own revision.

enabledboolean#

Whether the chunk takes part in retrieval. No operation in this API changes it.

end_offsetinteger#

Zero-based UTF-8 byte offset in the parsed document text. Exclusive end. null when unknown.

idstring#

Chunk ID. The chunk_id path value for Get Chunk.

kindstring#

What the chunk was built from: chunk for a run of body text (the default), section for a heading section, table for a table, image for an image, summary for a generated summary.

knowledge_space_idstring#

Internal ID of the knowledge base. Not the knowledge base ID in the path.

ordinalinteger#

Position of the chunk within the revision, starting at 0. Sort by it to read chunks in document order.

parent_chunk_idstring#

ID of the parent chunk for parent-child chunking. null for top-level chunks.

parse_element_idsstring[]#

IDs of the parsed elements the chunk was built from.

section_pathstring[]#

Headings from the document root to the chunk's section.

start_offsetinteger#

Zero-based UTF-8 byte offset in the parsed document text. Inclusive start. null when unknown.

textstring#

Chunk content.

token_countinteger#

Number of tokens in text.

user_metadataobject#

Metadata attached to the chunk. Free-form object.

List Chunks Delete Document Files in Batch