so my question is probably not vercel / nextjs specific but I figured somebody on here might know 🙂

I am trying to run langchain with openAI + an openapi spec with the vercel AI sdk langchain stream.

The error is basically that input is missing however I am passing in the input so I don't get it.

here is my route /api/chat

import { StreamingTextResponse, LangChainStream, Message } from "ai"; import { ChatOpenAI } from "langchain/chat_models/openai"; import { AIMessage, HumanMessage } from "langchain/schema"; import { createOpenApiAgent, OpenApiToolkit } from "langchain/agents"; import { JsonSpec } from "langchain/tools"; import { currentUser } from "@clerk/nextjs"; export const runtime = "edge"; export async function POST(req: Request) { const { messages } = await req.json(); const user = await currentUser(); const { stream, handlers } = LangChainStream(); const llm = new ChatOpenAI({ streaming: true, modelName: "gpt-3.5-turbo", temperature: 0.4, }); // Load the OpenAPI spec for the Fortnox API const rawFortnoxApiSpec = require("./fortnox.json"); const fortnoxApiSpec = new JsonSpec(rawFortnoxApiSpec); custom RequestsWrapper const fortnoxAgent = new OpenApiToolkit(fortnoxApiSpec, llm, { Authorization:Bearer ${user?.privateMetadata?.fortnoxAccessToken}, }); const executor = createOpenApiAgent(llm, fortnoxAgent); if (Array.isArray(messages) && messages.length > 0) { executor .call( messages.map((m) => m.role == "user" ? new HumanMessage(m.content) : new AIMessage(m.content), ), ) .catch(console.error); } else { console.error("No messages provided"); } return new StreamingTextResponse(stream); }

and the error: [Error: Missing value for input input]

client: https://sdk.vercel.ai/docs/api-reference/use-chat

Thnx