xtekky/gpt4free · error · NoValidHarFileError

No .har file found

Error message

No .har file found

What it means

Raised by get_har_files() when the cookies directory is readable but contains no .har files (the os.walk over the top level finds nothing ending in .har). The HAR capture of a ChatGPT browser session is the credential source for this auth flow, so without it the flow cannot proceed.

Source

Thrown at g4f/Provider/openai/har_file.py:61

        self.arkURL = arkURL
        self.arkBx = arkBx
        self.arkHeader = arkHeader
        self.arkBody = arkBody
        self.arkCookies = arkCookies
        self.userAgent = userAgent


def get_har_files():
    if not os.access(get_cookies_dir(), os.R_OK):
        raise NoValidHarFileError("har_and_cookies dir is not readable")
    harPath = []
    for root, _, files in os.walk(get_cookies_dir()):
        for file in files:
            if file.endswith(".har"):
                harPath.append(os.path.join(root, file))
        break
    if not harPath:
        raise NoValidHarFileError("No .har file found")
    harPath.sort(key=lambda x: os.path.getmtime(x))
    return harPath


def readHAR(request_config: RequestConfig):
    for path in get_har_files():
        with open(path, "rb") as file:
            try:
                harFile = json.loads(file.read())
            except json.JSONDecodeError:
                # Error: not a HAR file!
                continue
            for v in harFile["log"]["entries"]:
                v_headers = get_headers(v)
                if arkose_url == v["request"]["url"]:
                    request_config.arkose_request = parseHAREntry(v)
                elif v["request"]["url"].startswith(start_url):
                    try:

View on GitHub (pinned to 973504e177)

Solutions

1. Capture a .har file: open ChatGPT in DevTools > Network, reload, send one message, 'Save all as HAR'
2. Save it as something.har directly inside the har_and_cookies directory (not a subdirectory)
3. Strip double extensions so the file genuinely ends in .har
4. Alternatively use a different OpenAI auth method that doesn't need HAR files

import os
from g4f.cookies import get_cookies_dir

har_files = [f for f in os.listdir(get_cookies_dir()) if f.endswith('.har')]
if not har_files:
    raise SystemExit('Capture a .har from a ChatGPT session and place it in har_and_cookies/')

from g4f.errors import NoValidHarFileError
try:
    cfg = await get_request_config(request_config, proxy)
except NoValidHarFileError as e:
    if 'No .har file' in str(e):
        guide_user_to_capture_har()  # or switch auth method
        raise

When it happens

Trigger: Using OpenAI-with-HAR auth with an empty har_and_cookies directory, or one containing only cookie files (.json/.txt) and no .har capture.

Common situations: User exported cookies instead of a HAR capture; HAR file saved with a different extension (.har.txt); files placed in a subdirectory while the walk only scans the top level (note the `break` after the first iteration).

Related errors

• har_and_cookies dir is not readable
• The .har file is not valid
• No proof_token found in .har files
• ANTIGRAVITY_SERVICE_ACCOUNT environment variable not set. Pl
• Invalid response: {last_msg}

AI-assisted analysis of xtekky/gpt4free@973504e177 (2026-08-14). Data as JSON: /api/errors/4cb36c92d2c84f41. Report an issue: GitHub.