{"record":{"id":"6b27cf94f360b7ed","repo":"FlowiseAI/Flowise","slug":"invalid-json-in-the-chatopenai-s-baseoptions-ex","errorCode":null,"errorMessage":"Invalid JSON in the ChatOpenAI's BaseOptions: ${exception}","messagePattern":"Invalid JSON in the ChatOpenAI's BaseOptions: (.+?)","errorType":"exception","errorClass":"Error","httpStatus":null,"severity":"error","filePath":"packages/components/nodes/chatmodels/ChatOpenAI/ChatOpenAI.ts","lineNumber":285,"sourceCode":"            delete obj.temperature\n            delete obj.stop\n            const reasoning: OpenAIClient.Reasoning = {}\n            if (reasoningEffort) {\n                reasoning.effort = reasoningEffort\n            }\n            if (reasoningSummary) {\n                reasoning.summary = reasoningSummary\n            }\n            obj.reasoning = reasoning\n        }\n\n        let parsedBaseOptions: any | undefined = undefined\n\n        if (baseOptions) {\n            try {\n                parsedBaseOptions = typeof baseOptions === 'object' ? baseOptions : JSON.parse(baseOptions)\n            } catch (exception) {\n                throw new Error(\"Invalid JSON in the ChatOpenAI's BaseOptions: \" + exception)\n            }\n        }\n\n        if (basePath || parsedBaseOptions) {\n            obj.configuration = {\n                baseURL: basePath,\n                defaultHeaders: parsedBaseOptions\n            }\n        }\n\n        const multiModalOption: IMultiModalOption = {\n            image: {\n                allowImageUploads: allowImageUploads ?? false\n            }\n        }\n\n        const model = new ChatOpenAI(nodeData.id, obj)\n        model.setMultiModalOption(multiModalOption)","sourceCodeStart":267,"sourceCodeEnd":303,"githubUrl":"https://github.com/FlowiseAI/Flowise/blob/abe4a8601a058047b350c260676826e21dd14101/packages/components/nodes/chatmodels/ChatOpenAI/ChatOpenAI.ts#L267-L303","documentation":"ChatOpenAI parses the BaseOptions input the same way as the other OpenAI-compatible nodes: if it is a string it is JSON.parse'd, and any SyntaxError is wrapped with this label. The parsed value becomes defaultHeaders under obj.configuration. An object input bypasses parsing.","triggerScenarios":"The ChatOpenAI node's BaseOptions field holds invalid JSON — same shape of mistakes as [91] but on the primary ChatOpenAI node. The throw is reached only when baseOptions is a truthy string that fails to parse.","commonSituations":"Users configuring custom defaultHeaders (e.g. Helicone, Langfuse, OpenRouter passthrough) paste malformed JSON; copying header objects from Python dict syntax; trailing commas from a relaxed editor; smart quotes from a chat client.","solutions":["Validate the BaseOptions string with a JSON parser before saving the node.","Quote all keys/values with double quotes and drop trailing commas/comments.","Prefer passing the node a plain object (the typeof === 'object' branch skips JSON.parse).","Use a minimal example first ({\"X-Custom\":\"value\"}) and extend incrementally to isolate the bad token."],"exampleFix":"// before\n{ Authorization: \"Bearer x\", } // unquoted key + trailing comma -> throws [92]\n\n// after\n{ \"Authorization\": \"Bearer x\" }","handlingStrategy":"validation","validationCode":"function parseBaseOptions(raw) {\n  if (!raw) return undefined\n  if (typeof raw === 'object') return raw\n  try { return JSON.parse(raw) }\n  catch (e) { throw new Error(`ChatOpenAI BaseOptions JSON invalid: ${e.message}`) }\n}\nconst parsedBaseOptions = parseBaseOptions(nodeData.inputs?.baseOptions)","typeGuard":"function isHeadersObject(v: unknown): v is Record<string, string> {\n  if (typeof v !== 'object' || v === null || Array.isArray(v)) return false\n  return Object.values(v).every(x => typeof x === 'string')\n}","tryCatchPattern":"try {\n  return await initChatOpenAI(nodeData, options)\n} catch (e) {\n  if (e.message.includes(\"Invalid JSON in the ChatOpenAI's BaseOptions\")) {\n    throw new Error('Correct the BaseOptions JSON on the ChatOpenAI node, then redeploy.')\n  }\n  throw e\n}","preventionTips":["JSON-lint header objects before saving.","Use double quotes; no trailing commas; no comments.","Pass an object literal when building the node in code.","Keep BaseOptions minimal — only headers that OpenAI SDK does not natively accept."],"tags":["json","configuration","validation","openai","default-headers"],"backgroundTag":null,"analyzedSha":"abe4a8601a058047b350c260676826e21dd14101","analyzedAt":"2026-08-12T16:04:40.823Z","schemaVersion":2},"datasetVersion":"2026-08-12T18:17:37.767Z"}