{"record":{"id":"9cdbe033e47ef639","repo":"xtekky/gpt4free","slug":"no-valid-blackbox-session-found-please-log-in-to","errorCode":null,"errorMessage":"No valid Blackbox session found. Please log in to Blackbox AI in your browser first.","messagePattern":"No valid Blackbox session found\\. Please log in to Blackbox AI in your browser first\\.","errorType":"exception","errorClass":"NoValidHarFileError","httpStatus":null,"severity":"error","filePath":"g4f/Provider/needs_auth/BlackboxPro.py","lineNumber":2723,"sourceCode":"                    \"title\": \"\",\n                }\n\n            # Get session data from HAR files\n            cls.session_data = cls._find_session_in_har_files() or cls.session_data\n\n            if not cls.session_data:\n                async with session.get(\n                    \"https://www.blackbox.ai/api/auth/session\",\n                    cookies=get_cookies(cls.cookie_domain, False),\n                ) as resp:\n                    resp.raise_for_status()\n                    cls.session_data = await resp.json()\n\n            # Check if we have a valid session\n            if not cls.session_data:\n                # No valid session found, raise an error\n                debug.log(\"BlackboxPro: No valid session found in HAR files\")\n                raise NoValidHarFileError(\n                    \"No valid Blackbox session found. Please log in to Blackbox AI in your browser first.\"\n                )\n\n            debug.log(\n                f\"BlackboxPro: Using session from cookies / HAR file (email: {cls.session_data['user'].get('email', 'unknown')})\"\n            )\n\n            # Check subscription status\n            subscription_status = {\n                \"status\": \"FREE\",\n                \"customerId\": None,\n                \"isTrialSubscription\": False,\n                \"lastChecked\": None,\n            }\n            if cls.session_data.get(\"user\", {}).get(\"email\"):\n                subscription_status = await cls.check_subscription(\n                    cls.session_data[\"user\"][\"email\"]\n                )","sourceCodeStart":2705,"sourceCodeEnd":2741,"githubUrl":"https://github.com/xtekky/gpt4free/blob/973504e1770928ed5fb82f43da528f441ad9ddc3/g4f/Provider/needs_auth/BlackboxPro.py#L2705-L2741","documentation":"Raised as NoValidHarFileError by g4f/Provider/needs_auth/BlackboxPro.py when the provider cannot obtain a Blackbox session: the cached cls.session_data is empty and the GET to https://www.blackbox.ai/api/auth/session (made with cookies from get_cookies(cls.cookie_domain, False)) returned an empty/falsey JSON body. In practice this means no usable Blackbox login cookies or HAR file exist, so the /api/auth/session endpoint reported no authenticated user.","triggerScenarios":"Calling BlackboxPro.create_async_generator (directly or via g4f client) with cls.session_data unset, no blackbox.ai cookies in the cookie jar / HAR files, or cookies belonging to a logged-out session so that the auth/session response is empty. resp.raise_for_status() passes (HTTP 200) but the body is empty.","commonSituations":"Fresh install with no Blackbox HAR file in har_and_cookies/; user never logged in to blackbox.ai; exported cookies from an incognito/logged-out profile; Blackbox changed its session payload shape so the parsed JSON is empty.","solutions":["Log in to Blackbox AI (blackbox.ai) in your browser, then export the session cookies / a HAR file into g4f's har_and_cookies directory so get_cookies(cls.cookie_domain) returns valid auth cookies.","Verify the exported HAR actually contains a successful request to /api/auth/session with a non-empty JSON body containing a user object.","Re-export cookies if they are old — Blackbox sessions expire.","Retry after confirming the cookie_domain matches the domain you logged into (e.g. no www vs bare-domain mismatch)."],"exampleFix":"# before\nresponse = await client.chat.completions.create(model=\"\", provider=BlackboxPro, messages=msgs)\n# NoValidHarFileError: No valid Blackbox session found...\n\n# after\n# 1. log in to blackbox.ai in your browser\n# 2. copy the exported har/cookies file into <g4f>/har_and_cookies/\nresponse = await client.chat.completions.create(model=\"\", provider=BlackboxPro, messages=msgs)","handlingStrategy":"try-catch","validationCode":"from g4f.requests import get_cookies\nfrom g4f.Provider.needs_auth.BlackboxPro import BlackboxPro\n\ndef blackbox_session_available():\n    return bool(BlackboxPro.session_data) or bool(get_cookies(BlackboxPro.cookie_domain, False))","typeGuard":null,"tryCatchPattern":"try:\n    result = await client.chat.completions.create(model=\"\", provider=BlackboxPro, messages=msgs)\nexcept NoValidHarFileError:\n    prompt_user_to_import_har(\"blackbox.ai\")\nexcept Exception:\n    raise","preventionTips":["Import a fresh blackbox.ai HAR into har_and_cookies/ before enabling the provider.","Treat empty /api/auth/session responses as 'logged out' and re-export cookies.","Wrap provider selection so auth-less providers are skipped automatically."],"tags":["authentication","har-file","cookies","blackbox","session"],"backgroundTag":null,"analyzedSha":"973504e1770928ed5fb82f43da528f441ad9ddc3","analyzedAt":"2026-08-14T23:45:32.408Z","schemaVersion":2},"datasetVersion":"2026-08-15T22:17:37.221Z"}