PDF Loader API Always Returns "Loader not configured" When Calling Upsert

[jeyamuruganrani]

🐞 Problem Description

When using the Document Store API in Flowise (v3.x), the endpoint for creating a loader does not work as documented.

I tried calling the following endpoints:

• POST /api/v1/internal/document-store/loader/save
• POST /api/v1/document-store/loader/save
• POST /api/v1/document-store/loader

All of them return the Flowise frontend HTML page (index.html) instead of JSON.
This indicates that the route is not registered on the server.

Because of this, I cannot get a loaderId.

When I call:

POST /api/v1/document-store/upsert/:storeId

I always get this error:

{"statusCode":500,"success":false,"message":"Error: documentStoreServices.upsertDocStoreMiddleware - Loader not configured"}

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Even though I pass:

• loaderName
• chunkSize
• chunkOverlap
• useSplit
• loaderId (but loaderId cannot be created because loader API does not exist)

---

✅ Expected Behavior

A working loader creation endpoint such as:

• POST /api/v1/document-store/loader
  or
• POST /api/v1/internal/document-store/loader/save

should return JSON like:

{
"id": "",
"loaderName": "pdf",
"loaderConfig": { ... }
}

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Instead, Flowise returns the UI HTML file.

---

🔄 Steps to Reproduce

1. Start Flowise v3.x on Windows
2. Send a POST request to:

POST http://localhost:3000/api/v1/document-store/loader

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3. Flowise returns index.html
4. Calling /upsert fails with “Loader not configured”

---

🧪 Full Python Code Used

import requests

API = "http://localhost:3000/api/v1"
TOKEN = ""

headers = {
"Authorization": f"Bearer {TOKEN}",
"Content-Type": "application/json"
}

payload = {
"storeId": "76cccd65-f2b8-4fe6-abd8-408a391a9b18",
"loaderName": "pdf",
"loaderConfig": {
"useSplit": True,
"chunkSize": 500,
"chunkOverlap": 50
}
}

res = requests.post(
f"{API}/document-store/loader",
json=payload,
headers=headers
)

print("Status:", res.status_code)
print("Response:", res.text)

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Output

Status: 200
Response: ... (Flowise UI HTML)

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---

❌ Issue 1: File Upload API Fails (403 Forbidden)

Calling:

POST /api/v1/files

makefile
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Returns:

UPLOAD RESPONSE: 403 {"message":"Forbidden"}

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Python Code

import requests

TOKEN = "MY_TOKEN"
BASE = "http://localhost:3000/api/v1"

headers = {
"Authorization": f"Bearer {TOKEN}"
}

file_path = r"D:\jh\doc\lech202.pdf"

with open(file_path, "rb") as f:
upload_res = requests.post(
f"{BASE}/files",
headers=headers,
files={"files": ("lech202.pdf", f, "application/pdf")},
data={"folderName": "root"}
)

print("UPLOAD RESPONSE:", upload_res.status_code, upload_res.text)

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Token works for:

• GET /api/v1/document-store/store
• GET /api/v1/auth/resolve

But /files returns Forbidden (403).

---

❌ Issue 2: Loader Creation API Missing / Not Working

Tried:

• POST /api/v1/internal/document-store/loader/save
• POST /api/v1/document-store/loader/save
• POST /api/v1/document-store/loader

All return Flowise frontend HTML, not JSON:

Status: 200
Response: ... (index.html)

Thus, loaderId cannot be created.

---

❌ Issue 3: Upsert Always Fails With “Loader not configured”

Calling:

POST /api/v1/document-store/upsert/:storeId

Returns:

{
"statusCode": 500,
"success": false,
"message": "Error: documentStoreServices.upsertDocStoreMiddleware - Loader not configured"
}

Since loaderId cannot be created, upsert always fails.

---

🧪 cURL Commands to Reproduce

1️⃣ Loader Creation API (returns HTML)

curl -X POST "http://localhost:3000/api/v1/document-store/loader" ^
-H "Authorization: Bearer " ^
-H "Content-Type: application/json" ^
--data "{
"storeId": "76cccd65-f2b8-4fe6-abd8-408a391a9b18",
"loaderName": "pdf",
"loaderConfig": {
"useSplit": true,
"chunkSize": 500,
"chunkOverlap": 50
}
}"

2️⃣ File Upload API (403 Forbidden)

curl -X POST "http://localhost:3000/api/v1/files" ^
-H "Authorization: Bearer " ^
-F "files=@d:\jh\doc\lech202.pdf" ^
-F "folderName=root"

3️⃣ Upsert API (Loader not configured)

curl -X POST "http://localhost:3000/api/v1/document-store/upsert/76cccd65-f2b8-4fe6-abd8-408a391a9b18" ^
-H "Authorization: Bearer " ^
-F "files=@d:\jh\doc\lech202.pdf" ^
-F "loaderId="

Since loaderId cannot be created, this always fails.

---

🖥️ System Info

• OS: Windows 10
• Flowise Version: 3.0.8
• Node: 18+
• Running via: npm start (packages/server/bin/start)

---

🟧 Summary (Important)

There are 3 major issues in Flowise v3.x:

1. /api/v1/files returns 403 Forbidden
2. Loader creation API route is missing or incorrectly mapped
3. Upsert fails because loaderId cannot be created

BUG: Loader API route is missing or incorrect, causing Document Store upload and upsert to fail in Flowise v3.x.

[HenryHengZJ]

I'd recommend using this guide for the API: https://docs.flowiseai.com/using-flowise/document-stores#id-10.-api

you can also view the API:

[jeyamuruganrani]

Title:
❗ Document Store Upsert API Fails with “OPENAI_API_KEY missing” even when embedding credential is provided

Issue Description

I am trying to upload a PDF to a Document Store and process it with Loader + Splitter + Embedding + Pinecone Vector Store using the official Flowise API:

POST /api/v1/document-store/upsert/:id

Even after setting correct loader, splitter, embedding, and vector store configuration, the request fails with:

Error: The OPENAI_API_KEY environment variable is missing or empty

But I already passed the embedding credential ID in the POST request.

Error Output
Error: documentStoreServices.upsertDocStoreMiddleware -
Error: documentStoreServices.insertIntoVectorStore -
Error: documentStoreServices._insertIntoVectorStoreWorkerThread -
Error: The OPENAI_API_KEY environment variable is missing or empty;
either provide it, or instantiate the OpenAI client with an apiKey option.

Flowise Behavior

Loader is created successfully

Splitter is applied

File uploads properly

Error comes during embedding → vector store insert phase

It seems that the background worker ignores credential ID and only checks the system ENV OPENAI_API_KEY

Steps to Reproduce

1. Create credentials inside Flowise

OpenAI Embedding Credential

Pinecone Credential

2. Create new loader ID in Document Store
3. Send API request

Python code:

import requests
import json

DOC_STORE_ID = "068fb017-d0ea-4083-a786-1ec351712903"
DOC_LOADER_ID="ccdd5082-9f57-43eb-b761-767e52c52547"
API_URL = f"http://localhost:3000/api/v1/document-store/upsert/{DOC_STORE_ID}"
API_KEY = "JKzkVwnfgSQ92IZq2MQHEgkf6FLxkoXGRySVvrn6whw"

file_path = r"C:\Users\admin\Downloads\lech2an.pdf"
form_data = { "files": ('lech2an.pdf', open(file_path, 'rb')) }

loader = { "name": "pdfFile", "config": {} }

splitter = {
"name": "recursiveCharacterTextSplitter",
"config": { "chunkSize": 1400, "chunkOverlap": 100 }
}

embedding = {
"name": "openAIEmbeddings",
"config": {
"modelName": "text-embedding-ada-002",
"credential":"ea4550ca-bf6b-43c9-9971-be97a2b7b1b4"
}
}

vectorStore = {
"name": "pinecone",
"config": {
"pineconeIndex": "flowisephy",
"pineconeNamespace": "examplenamespace",
"credential":"f18c7b09-c8f2-46ae-b473-e6a71731860a"
}
}

body_data = {
"docId": DOC_LOADER_ID,
"loader": json.dumps(loader),
"splitter": json.dumps(splitter),
"embedding": json.dumps(embedding),
"vectorStore": json.dumps(vectorStore)
}

headers = { "Authorization": f"Bearer {API_KEY}" }

response = requests.post(API_URL, files=form_data, data=body_data, headers=headers)
print(response.json())

Expected Behaviour

Flowise worker should use:

The credential ID provided in the embedding JSON

Not the global environment variable.

Actual Behaviour

Flowise worker ignores the credential ID and requires a global OS variable:

OPENAI_API_KEY

My Exact Requirement

I need to create a separate loader for each document, and the loader can be either a PDF loader or a Google Drive loader.

Each loader must have its own text splitter, so that the chunks are generated independently for every document.

Each loader must have its own embedding model and its own embedding credential — meaning every document/loader must use a different embedding key.

Each loader must also have its own Pinecone vector store configuration.

The vector store namespace, index, and credentials must be different for each loader.

There should be no shared vector store across different documents.

---

Second problem: I am using this code.

import requests
import json

DOC_STORE_ID = "068fb017-d0ea-4083-a786-1ec351712903"
DOC_LOADER_ID = "f5d78cc3-5a1d-4e9f-bcf7-fcc3992a1e26"
API_URL = f"http://localhost:3000/api/v1/document-store/upsert/{DOC_STORE_ID}"
BEARER_TOKEN = "JKzkVwnfgSQ92IZq2MQHEgkf6FLxkoXGRySVvrn6whw"

file_path = r"C:\Users\admin\Downloads\lech2an.pdf"

form_data = {
"files": ('lech2an.pdf', open(file_path, 'rb'))
}

body_data = {
"docId": DOC_LOADER_ID
}

headers = {
"Authorization": f"Bearer {BEARER_TOKEN}"
}

def query(form_data):
response = requests.post(API_URL, files=form_data, data=body_data, headers=headers)
print(response)
return response.json()

output = query(form_data)
print(output)

out put:
<Response [200]>
{'numAdded': 8, 'addedDocs': [{'pageContent': '3\nCOCH\n2\nCH\n2\nCH\n3\nReprint 2025-26', 'metadata': {'source': 'manual-upload', 'blobType': '', 'pdf': {'version': '1.10.100', 'info': {'PDFFormatVersion': '1.5', 'IsAcroFormPresent': False, 'IsXFAPresent': False, 'Title': 'D:\TEXTBOOKS\RATIONALISED 20222-23\Neha\12086 — Chemistry Part_II\1 Source Files\12086 — Chemistry Part_II\Exercises Answer\Answers.pmd', 'Author': '205DTP3', 'Creator': 'Bullzip PDF Printer (12.2.0.2905)', 'Producer': 'PDF Printer / www.bullzip.com / FG / Freeware Edition (max 10 users)', 'CreationDate': "D:20221017123730-07'00'", 'ModDate': "D:20250408100640+05'30'"}, 'metadata': {'_metadata': {'pdf:producer': 'PDF Printer / www.bullzip.com / FG / Freeware Edition (max 10 users)', 'xmp:modifydate': '2025-04-08T10:06:40+05:30', 'xmp:createdate': '2022-10-17T12:37:30-07:00', 'xmp:creatortool': 'Bullzip PDF Printer (12.2.0.2905)', 'xmp:metadatadate': '2025-04-08T10:06:40+05:30', 'xmpmm:documentid': 'uuid:a35a8b02-50ae-11ed-0000-36e5d8c67c62', 'xmpmm:instanceid': 'uuid:aff54fe8-2b97-4911-acf8-fb948a90e3d4', 'dc:format': 'application/pdf', 'dc:title': 'D:\TEXTBOOKS\RATIONALISED 20222-23\Neha\12086 — Chemistry Part_II\1 Source Files\12086 — Chemistry Part_II\Exercises Answer\Answers.pmd', 'dc:creator': '205DTP3'}}, 'totalPages': 6}, 'loc': {'pageNumber': 3, 'lines': {'from': 71, 'to': 78}}}}, {'pageContent': '8.3(i)\n(ii)\n(iii)(iv)\nH C–C–CH=C–CH\n33\nCH\n3\nO\n(v)(vi)\nReprint 2025-26', 'metadata': {'source': 'manual-upload', 'blobType': '', 'pdf': {'version': '1.10.100', 'info': {'PDFFormatVersion': '1.5', 'IsAcroFormPresent': False, 'IsXFAPresent': False, 'Title': 'D:\TEXTBOOKS\RATIONALISED 20222-23\Neha\12086 — Chemistry Part_II\1 Source Files\12086 — Chemistry Part_II\Exercises Answer\Answers.pmd', 'Author': '205DTP3', 'Creator': 'Bullzip PDF Printer (12.2.0.2905)', 'Producer': 'PDF Printer / www.bullzip.com / FG / Freeware Edition (max 10 users)', 'CreationDate': "D:20221017123730-07'00'", 'ModDate': "D:20250408100640+05'30'"}, 'metadata': {'_metadata': {'pdf:producer': 'PDF Printer / www.bullzip.com / FG / Freeware Edition (max 10 users)', 'xmp:modifydate': '2025-04-08T10:06:40+05:30', 'xmp:createdate': '2022-10-17T12:37:30-07:00', 'xmp:creatortool': 'Bullzip PDF Printer (12.2.0.2905)', 'xmp:metadatadate': '2025-04-08T10:06:40+05:30', 'xmpmm:documentid': 'uuid:a35a8b02-50ae-11ed-0000-36e5d8c67c62', 'xmpmm:instanceid': 'uuid:aff54fe8-2b97-4911-acf8-fb948a90e3d4', 'dc:format': 'application/pdf', 'dc:title': 'D:\TEXTBOOKS\RATIONALISED 20222-23\Neha\12086 — Chemistry Part_II\1 Source Files\12086 — Chemistry Part_II\Exercises Answer\Answers.pmd', 'dc:creator': '205DTP3'}}, 'totalPages': 6}, 'loc': {'pageNumber': 2, 'lines': {'from': 29, 'to': 38}}}}, {'pageContent': 'Answers...\n305\n(vii)(viii)\n 8.4(i)Heptan-2-one(ii)4-Bromo-2-methylhexanal(iii)Heptanal\n(iv)3-Phenylprop-2-enal(v)Cyclopentanecarbaldehyde(vi)Diphenylmethanone\n 8.5(i)\n(ii)\n(iii)(iv)\n(v)(vi)\n 8.6(i)(ii)\n(iii)(iv)(v) \n 8.7(ii), (v), (vi), (vii): Aldol condensation. (i), (iii), (ix) Cannizaro reaction. (iv), (viii) Neither.\n 8.102-Ethylbenzaldehyde (draw the structure yourself).\n 8.11(A) CH\n3\nCH\n2\nCH\n2\nCOOCH\n2\nCH\n2\nCH\n2\nCH\n3\n, butyl butanoate.\n(B) CH\n3\nCH\n2\nCH\n2 \nCOOH (C) CH\n3\nCH\n2\nCH\n2\nCH\n2\nOH. Write equation yourself.\n 8.12(i) Di-tert-butyl ketone < Methyl tert-butyl ketone < Acetone < Acetaldehyde\n(ii) (CH\n3\n)\n2\nCHCOOH < CH\n3\nCH\n2\nCH\n2\nCOOH < CH\n3\nCH(Br)CH\n2\nCOOH < CH\n3\nCH\n2\nCH(Br)COOH\n (iii)4-Methoxybenzoic acid < Benzoic acid < 4-Nitrobenzoic acid < 3,4-Dinitrobenzoic acid.\n 8.17(i)\n(ii)(iii)\n(iv)(v)(vi)\n(vii)(viii)(ix)\n(x)(xi)\n 8.19The compound is methyl ketone and its structure would be: CH\n3\nCOCH\n2\nCH\n2\nCH\n3', 'metadata': {'source': 'manual-upload', 'blobType': '', 'pdf': {'version': '1.10.100', 'info': {'PDFFormatVersion': '1.5', 'IsAcroFormPresent': False, 'IsXFAPresent': False, 'Title': 'D:\TEXTBOOKS\RATIONALISED 20222-23\Neha\12086 — Chemistry Part_II\1 Source Files\12086 — Chemistry Part_II\Exercises Answer\Answers.pmd', 'Author': '205DTP3', 'Creator': 'Bullzip PDF Printer (12.2.0.2905)', 'Producer': 'PDF Printer / www.bullzip.com / FG / Freeware Edition (max 10 users)', 'CreationDate': "D:20221017123730-07'00'", 'ModDate': "D:20250408100640+05'30'"}, 'metadata': {'_metadata': {'pdf:producer': 'PDF Printer / www.bullzip.com / FG / Freeware Edition (max 10 users)', 'xmp:modifydate': '2025-04-08T10:06:40+05:30', 'xmp:createdate': '2022-10-17T12:37:30-07:00', 'xmp:creatortool': 'Bullzip PDF Printer (12.2.0.2905)', 'xmp:metadatadate': '2025-04-08T10:06:40+05:30', 'xmpmm:documentid': 'uuid:a35a8b02-50ae-11ed-0000-36e5d8c67c62', 'xmpmm:instanceid': 'uuid:aff54fe8-2b97-4911-acf8-fb948a90e3d4', 'dc:format': 'application/pdf', 'dc:title': 'D:\TEXTBOOKS\RATIONALISED 20222-23\Neha\12086 — Chemistry Part_II\1 Source Files\12086 — Chemistry Part_II\Exercises Answer\Answers.pmd', 'dc:creator': '205DTP3'}}, 'totalPages': 6}, 'loc': {'pageNumber': 3, 'lines': {'from': 1, 'to': 77}}}}, {'pageContent': '304Chemistry\n7.5Hydrogen bonding between alcohol and water molecules.\n7.8o-Nitrophenol is steam volatile because of intramolecular hydrogen bonding.\n 7.12Hint: Carryout sulphonation followed by nucleophilic substitution.\n 7.13(i)\n(ii)\n(iii)\n 7.14Reaction with (i) sodium and (ii) sodium hydroxide\n 7.15Due to electron withdrawing effect of nitro group and electron releasing effect of methoxy group.\n 7.20(i)Hydration of Propene.\n(ii)By nucleophilic substitution of –Cl in benzyl chloride using dilute NaOH.\n(iii)\n2\nH O\n25252252\nC H MgBrHCHOC H CH OMgBrC H CH OH\uf02b\uf0ae\uf0be\uf0be\uf0be\uf0ae\n(iv)\n 7.23(i)1-Ethoxy-2-methylpropane.\n(ii)2-Chloro-1-methoxyethane.\n(iii)4-Nitroanisole.\n(iv)1-Methoxypropane.\n(v)1-Ethoxy-4,4-dimethylcyclohexane.\n(vi)Ethoxybenzene.\nUNIT 8\n 8.2(i)4-Methylpentanal(ii)6-Chloro-4-ethylhexan-3-one\n(iii)But-2-enal(iv)Pentane-2,4-dione\n(v)3,3,5-Trimethylhexan-2-one(vi)3,3-Dimethylbutanoic acid\n(vii)Benzene –1,4-dicarbaldehyde\n8.3(i)\n(ii)\n(iii)(iv)', 'metadata': {'source': 'manual-upload', 'blobType': '', 'pdf': {'version': '1.10.100', 'info': {'PDFFormatVersion': '1.5', 'IsAcroFormPresent': False, 'IsXFAPresent': False, 'Title': 'D:\TEXTBOOKS\RATIONALISED 20222-23\Neha\12086 — Chemistry Part_II\1 Source Files\12086 — Chemistry Part_II\Exercises Answer\Answers.pmd', 'Author': '205DTP3', 'Creator': 'Bullzip PDF Printer (12.2.0.2905)', 'Producer': 'PDF Printer / www.bullzip.com / FG / Freeware Edition (max 10 users)', 'CreationDate': "D:20221017123730-07'00'", 'ModDate': "D:20250408100640+05'30'"}, 'metadata': {'_metadata': {'pdf:producer': 'PDF Printer / www.bullzip.com / FG / Freeware Edition (max 10 users)', 'xmp:modifydate': '2025-04-08T10:06:40+05:30', 'xmp:createdate': '2022-10-17T12:37:30-07:00', 'xmp:creatortool': 'Bullzip PDF Printer (12.2.0.2905)', 'xmp:metadatadate': '2025-04-08T10:06:40+05:30', 'xmpmm:documentid': 'uuid:a35a8b02-50ae-11ed-0000-36e5d8c67c62', 'xmpmm:instanceid': 'uuid:aff54fe8-2b97-4911-acf8-fb948a90e3d4', 'dc:format': 'application/pdf', 'dc:title': 'D:\TEXTBOOKS\RATIONALISED 20222-23\Neha\12086 — Chemistry Part_II\1 Source Files\12086 — Chemistry Part_II\Exercises Answer\Answers.pmd', 'dc:creator': '205DTP3'}}, 'totalPages': 6}, 'loc': {'pageNumber': 2, 'lines': {'from': 1, 'to': 31}}}}, {'pageContent': 'Notes\nReprint 2025-26', 'metadata': {'source': 'manual-upload', 'blobType': '', 'pdf': {'version': '1.10.100', 'info': {'PDFFormatVersion': '1.5', 'IsAcroFormPresent': False, 'IsXFAPresent': False, 'Title': 'D:\TEXTBOOKS\RATIONALISED 20222-23\Neha\12086 — Chemistry Part_II\1 Source Files\12086 — Chemistry Part_II\Exercises Answer\Answers.pmd', 'Author': '205DTP3', 'Creator': 'Bullzip PDF Printer (12.2.0.2905)', 'Producer': 'PDF Printer / www.bullzip.com / FG / Freeware Edition (max 10 users)', 'CreationDate': "D:20221017123730-07'00'", 'ModDate': "D:20250408100640+05'30'"}, 'metadata': {'_metadata': {'pdf:producer': 'PDF Printer / www.bullzip.com / FG / Freeware Edition (max 10 users)', 'xmp:modifydate': '2025-04-08T10:06:40+05:30', 'xmp:createdate': '2022-10-17T12:37:30-07:00', 'xmp:creatortool': 'Bullzip PDF Printer (12.2.0.2905)', 'xmp:metadatadate': '2025-04-08T10:06:40+05:30', 'xmpmm:documentid': 'uuid:a35a8b02-50ae-11ed-0000-36e5d8c67c62', 'xmpmm:instanceid': 'uuid:aff54fe8-2b97-4911-acf8-fb948a90e3d4', 'dc:format': 'application/pdf', 'dc:title': 'D:\TEXTBOOKS\RATIONALISED 20222-23\Neha\12086 — Chemistry Part_II\1 Source Files\12086 — Chemistry Part_II\Exercises Answer\Answers.pmd', 'dc:creator': '205DTP3'}}, 'totalPages': 6}, 'loc': {'pageNumber': 6, 'lines': {'from': 1, 'to': 2}}}}, {'pageContent': '306Chemistry\nUNIT 9\n9.1(i)1-methylethylamine or propan-2-amine(ii)Propan-1-amine\n(iii)N-methyl-2-methylethylamine or N-methylpropan-2-amine(iv)2-methylpropan-2-amine\n(v)N-methylbenzenamine or N-methylaniline(vi)N-Ethyl-N-methylethanamine\n(vii)3-Bromoaniline or 3-Bromobenzenamine\n9.4(i)C\n6\nH\n5\nNH\n2\n < C\n6\nH\n5\nNHCH\n3\n < C\n2\nH\n5\nNH\n2\n < (C\n2\nH\n5\n)\n2\nNH\n(ii)C\n6\nH\n5\nNH\n2\n < C\n6\nH\n5\nN(CH\n3\n)\n2\n < CH\n3\nNH\n2\n < (C\n2\nH\n5\n)\n2\nNH\n(iii)(a) p-nitroaniline < aniline < p-toluidine\n(b) C\n6\nH\n5\nNH\n2\n < C\n6\nH\n5\nNHCH\n3\n < C\n6\nH\n5\nCH\n2\nNH\n2\n(iv)(C\n2\nH\n5\n)\n3\nN > (C\n2\nH\n5\n)\n2\nNH > C\n2\nH\n5\nNH\n2\n > NH\n3\n(v) (CH\n3\n)\n2\nNH < C\n2\nH\n5\nNH\n2\n < C\n2\nH\n5\nOH\n(vi)C\n6\nH\n5\nNH\n2\n < (C\n2\nH\n5\n)\n2\nNH < C\n2\nH\n5\nNH\n2\nReprint 2025-26', 'metadata': {'source': 'manual-upload', 'blobType': '', 'pdf': {'version': '1.10.100', 'info': {'PDFFormatVersion': '1.5', 'IsAcroFormPresent': False, 'IsXFAPresent': False, 'Title': 'D:\TEXTBOOKS\RATIONALISED 20222-23\Neha\12086 — Chemistry Part_II\1 Source Files\12086 — Chemistry Part_II\Exercises Answer\Answers.pmd', 'Author': '205DTP3', 'Creator': 'Bullzip PDF Printer (12.2.0.2905)', 'Producer': 'PDF Printer / www.bullzip.com / FG / Freeware Edition (max 10 users)', 'CreationDate': "D:20221017123730-07'00'", 'ModDate': "D:20250408100640+05'30'"}, 'metadata': {'_metadata': {'pdf:producer': 'PDF Printer / www.bullzip.com / FG / Freeware Edition (max 10 users)', 'xmp:modifydate': '2025-04-08T10:06:40+05:30', 'xmp:createdate': '2022-10-17T12:37:30-07:00', 'xmp:creatortool': 'Bullzip PDF Printer (12.2.0.2905)', 'xmp:metadatadate': '2025-04-08T10:06:40+05:30', 'xmpmm:documentid': 'uuid:a35a8b02-50ae-11ed-0000-36e5d8c67c62', 'xmpmm:instanceid': 'uuid:aff54fe8-2b97-4911-acf8-fb948a90e3d4', 'dc:format': 'application/pdf', 'dc:title': 'D:\TEXTBOOKS\RATIONALISED 20222-23\Neha\12086 — Chemistry Part_II\1 Source Files\12086 — Chemistry Part_II\Exercises Answer\Answers.pmd', 'dc:creator': '205DTP3'}}, 'totalPages': 6}, 'loc': {'pageNumber': 4, 'lines': {'from': 1, 'to': 131}}}}, {'pageContent': 'Notes\nReprint 2025-26', 'metadata': {'source': 'manual-upload', 'blobType': '', 'pdf': {'version': '1.10.100', 'info': {'PDFFormatVersion': '1.5', 'IsAcroFormPresent': False, 'IsXFAPresent': False, 'Title': 'D:\TEXTBOOKS\RATIONALISED 20222-23\Neha\12086 — Chemistry Part_II\1 Source Files\12086 — Chemistry Part_II\Exercises Answer\Answers.pmd', 'Author': '205DTP3', 'Creator': 'Bullzip PDF Printer (12.2.0.2905)', 'Producer': 'PDF Printer / www.bullzip.com / FG / Freeware Edition (max 10 users)', 'CreationDate': "D:20221017123730-07'00'", 'ModDate': "D:20250408100640+05'30'"}, 'metadata': {'_metadata': {'pdf:producer': 'PDF Printer / www.bullzip.com / FG / Freeware Edition (max 10 users)', 'xmp:modifydate': '2025-04-08T10:06:40+05:30', 'xmp:createdate': '2022-10-17T12:37:30-07:00', 'xmp:creatortool': 'Bullzip PDF Printer (12.2.0.2905)', 'xmp:metadatadate': '2025-04-08T10:06:40+05:30', 'xmpmm:documentid': 'uuid:a35a8b02-50ae-11ed-0000-36e5d8c67c62', 'xmpmm:instanceid': 'uuid:aff54fe8-2b97-4911-acf8-fb948a90e3d4', 'dc:format': 'application/pdf', 'dc:title': 'D:\TEXTBOOKS\RATIONALISED 20222-23\Neha\12086 — Chemistry Part_II\1 Source Files\12086 — Chemistry Part_II\Exercises Answer\Answers.pmd', 'dc:creator': '205DTP3'}}, 'totalPages': 6}, 'loc': {'pageNumber': 5, 'lines': {'from': 1, 'to': 2}}}}, {'pageContent': 'Answers...\n303\nUNIT 7\n7.1(i)2,2,4-Trimethylpentan –3-ol(ii)5-Ethylheptane –2, 4-diol\n(iii)Butane –2,3-diol(iv)Propane –1,2,3,-triol\n(v)2- Methylphenol(vi)4-Methylphenol\n(vii)2,5 – Dimethylphenol(viii)2,6-Dimethylphenol\n(ix)1-Methoxy-2-methylpropane(x)Ethoxybenzene\n(xi)1-phenoxyheptane(xii)2 –Ethoxybutane\n7.2(i)\n(ii)\n(iii) (iv)\n(v)(vi)\n(vii)(viii)\n(ix)(x)\n7.3 (i)(a)CH\n3\nCH\n2\nCH\n2\nCH\n2\nCH\n2\nOH, Pentan-1-ol;\n(b)\n;\n(c)(d)\n(e)(f)\n(g)(h)\n7.4Hydrogen bonding in propanol.\nAnswers to Some Questions in Exercises\nCH\n3\n–CH\n2\n–OH–CH\n2\n–CH\n3\n, Pentan-3-ol\nOH\nReprint 2025-26', 'metadata': {'source': 'manual-upload', 'blobType': '', 'pdf': {'version': '1.10.100', 'info': {'PDFFormatVersion': '1.5', 'IsAcroFormPresent': False, 'IsXFAPresent': False, 'Title': 'D:\TEXTBOOKS\RATIONALISED 20222-23\Neha\12086 — Chemistry Part_II\1 Source Files\12086 — Chemistry Part_II\Exercises Answer\Answers.pmd', 'Author': '205DTP3', 'Creator': 'Bullzip PDF Printer (12.2.0.2905)', 'Producer': 'PDF Printer / www.bullzip.com / FG / Freeware Edition (max 10 users)', 'CreationDate': "D:20221017123730-07'00'", 'ModDate': "D:20250408100640+05'30'"}, 'metadata': {'_metadata': {'pdf:producer': 'PDF Printer / www.bullzip.com / FG / Freeware Edition (max 10 users)', 'xmp:modifydate': '2025-04-08T10:06:40+05:30', 'xmp:createdate': '2022-10-17T12:37:30-07:00', 'xmp:creatortool': 'Bullzip PDF Printer (12.2.0.2905)', 'xmp:metadatadate': '2025-04-08T10:06:40+05:30', 'xmpmm:documentid': 'uuid:a35a8b02-50ae-11ed-0000-36e5d8c67c62', 'xmpmm:instanceid': 'uuid:aff54fe8-2b97-4911-acf8-fb948a90e3d4', 'dc:format': 'application/pdf', 'dc:title': 'D:\TEXTBOOKS\RATIONALISED 20222-23\Neha\12086 — Chemistry Part_II\1 Source Files\12086 — Chemistry Part_II\Exercises Answer\Answers.pmd', 'dc:creator': '205DTP3'}}, 'totalPages': 6}, 'loc': {'pageNumber': 1, 'lines': {'from': 1, 'to': 44}}}}], 'docId': '9004bb61-fc9a-41c2-b698-4166d62a0bf8'}

Everything is okay, but when I click Preview & Process, the screen shows a blank page.

[jeyamuruganrani]

Also noticied ### Example source code from documentation contains bug, not executing

import requests
import json

DOC_STORE_ID = "your_doc_store_id"
API_URL = f"http://localhost:3000/api/v1/document-store/upsert/{DOC_STORE_ID}"
API_KEY = "your_api_key_here"

form_data = {
"files": ('my-another-file.pdf', open('my-another-file.pdf', 'rb'))
}

loader = {
"name": "pdfFile",
"config": {} # you can leave empty to use default config
}

splitter = {
"name": "recursiveCharacterTextSplitter",
"config": {
"chunkSize": 1400,
"chunkOverlap": 100
}
}

embedding = {
"name": "openAIEmbeddings",
"config": {
"modelName": "text-embedding-ada-002",
"credential": <your_credential_id>
}
}

vectorStore = {
"name": "pinecone",
"config": {
"pineconeIndex": "exampleindex",
"pineconeNamespace": "examplenamespace",
"credential": <your_credential_i
}
}

body_data = {
"docId": DOC_LOADER_ID,
"loader": json.dumps(loader),
"splitter": json.dumps(splitter),
"embedding": json.dumps(embedding),
"vectorStore": json.dumps(vectorStore)
}

headers = {
"Authorization": f"Bearer {BEARER_TOKEN}"
}

def query(form_data):
response = requests.post(API_URL, files=form_data, data=body_data, headers=headers)
print(response)
return response.json()

output = query(form_data)
print(output)

---

The first problem is:
At the top, you declared a variable called API_KEY, but later in the headers you used BEARER_TOKEN. These two variables are different, and BEARER_TOKEN is not defined anywhere in the code.

The second problem is:
In body_data, you used "docId": DOC_LOADER_ID, but you never defined DOC_LOADER_ID anywhere in the code.