Error: OpenAI or Azure OpenAI API key not found

[Elindo586]

I am using NEXT.JS.... I was thinking OpenAI would automatically process .env???

This is the code I have from pages/api/ai.js in Next.js

import { OpenAI } from "langchain/llms/openai";
import { PromptTemplate } from "langchain/prompts";
import { LLMChain } from "langchain/chains";

const model = new OpenAI({ temperature: 0 });
const template =
  "Be very funny when answering questions\n Question: {question}";
const prompt = new PromptTemplate({ template, inputVariables: ["question"] });

const chain = new LLMChain({ llm: model, prompt });

const result = await chain.call({ question: "What is the capital of France?" });
console.log(result);

file:///C:/Users/Edgar/Desktop/Stuff/Acode/nextprojectd/node_modules/langchain/dist/llms/openai.js:219
            throw new Error("OpenAI or Azure OpenAI API key not found");
                  ^

Error: OpenAI or Azure OpenAI API key not found
    at new OpenAI (file:///C:/Users/Edgar/Desktop/Stuff/Acode/nextprojectd/node_modules/langchain/dist/llms/openai.js:219:19)
    at file:///C:/Users/Edgar/Desktop/Stuff/Acode/nextprojectd/pages/api/ai.js:5:15
    at ModuleJob.run (node:internal/modules/esm/module_job:194:25)

^^ Obviously this code isn't working, maybe because I am not processing the .env? How could I include the processing of the .env in the code???

Also... the same code work in just Node.js with the addition of:

import { config } from "dotenv";
config();

But Next.js I understand doesn't need dotenv???

[dosubot[bot]]

🤖

Hello,

The error message "OpenAI or Azure OpenAI API key not found" suggests that the API key for OpenAI is not being found in your Next.js application. This could be due to the way environment variables are handled in Next.js, which is different from Node.js.

In Next.js, environment variables are loaded from the .env.local file in your project root during build time. However, these variables are only available on the server side by default. If you want to expose some of these variables to the browser, you need to prefix them with NEXT_PUBLIC_.

Assuming your OpenAI API key is stored in an environment variable named OPENAI_API_KEY, you should rename it to NEXT_PUBLIC_OPENAI_API_KEY in your .env.local file. Then, you can access it in your code like this:

import { initializeAgentExecutorWithOptions } from "langchain/agents";
import { ChatOpenAI } from "langchain/chat_models/openai";
import { SerpAPI } from "langchain/tools";
import { Calculator } from "langchain/tools/calculator";

const tools = [new Calculator(), new SerpAPI()];
const chat = new ChatOpenAI({ modelName: "gpt-4", temperature: 0, openAIApiKey: process.env.NEXT_PUBLIC_OPENAI_API_KEY });

const executor = await initializeAgentExecutorWithOptions(tools, chat, {
  agentType: "openai-functions",
  verbose: true,
});

const result = await executor.run("What is the weather in New York?");
console.log(result);

Remember to restart your Next.js server after making changes to your .env.local file.

As for the correct way to initialize and use the OpenAI model in the langchainjs framework, you first need to import the ChatOpenAI model from the langchain/chat_models/openai module. Then, you can create a new instance of the ChatOpenAI model by using the new keyword and passing an object with the temperature and openAIApiKey properties to the constructor. The temperature controls the randomness of the model's output, and openAIApiKey is your OpenAI API key.

After initializing the model, you can use the predictMessages method of the model to generate text. The predictMessages method takes two arguments: an array of HumanMessage objects and an options object. The HumanMessage object represents the input to the model, and the options object can contain tools or functions that the model can use to generate its output.

Here is the code snippet from the context shared:

import { ChatOpenAI } from "langchain/chat_models/openai";
import { HumanMessage } from "langchain/schema";
import { SerpAPI } from "langchain/tools";
import { createOpenAPIChain } from "../openapi";

const model = new ChatOpenAI({
  temperature: 0.9,
  openAIApiKey: "YOUR-API-KEY", // In Node.js defaults to process.env.OPENAI_API_KEY
});

const modelForFunctionCalling = new ChatOpenAI({
  modelName: "gpt-4",
  temperature: 0,
});

await modelForFunctionCalling.predictMessages(
  [new HumanMessage("What is the weather in New York?")],
  { tools: [new SerpAPI()] }
);

const chain = await createOpenAPIChain(
  "https://gist.githubusercontent.com/roaldnefs/053e505b2b7a807290908fe9aa3e1f00/raw/0a212622ebfef501163f91e23803552411ed00e4/openapi.yaml",
  {
    llm: new ChatOpenAI({ modelName: "gpt-4-0613", temperature: 0 }),
  }
);

const result = await chain.run(`What's today's comic?`);
console.log(result);

In this example, the model is asked to predict the weather in New York and the comic of the day. The results of the predictMessages and run methods are then logged to the console.

I hope this helps! Let me know if you have any other questions.

Sources

• Even when using Azure OpenAI, if OPENAI_API_KEY does not exist, an error is output
• examples/src/models/llm/openai_userid.ts
• examples/src/models/chat/integration_openai.ts
• examples/src/agents/openai.ts
• examples/src/llms/openai.ts
• langchain/src/chains/openai_functions/tests/openapi.int.test.ts

---

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[Elindo586]

How can I process the .env from this line of code?

import { OpenAI } from "langchain/llms/openai";
const llm = new OpenAI({ temperature: 0 });

I am using it inside the Next.js api..... pages/api/ai.js

still give me the Error
Error: OpenAI or Azure OpenAI API key not found

[muneebwaqas416]

@Elindo586 Bro have you find the solution to this .I am instantiating a OpenAI null object and I am receiving the same error

import { OpenAIEmbeddings } from "@langchain/openai"; const embeddingsArrays = await new OpenAIEmbeddings().embedDocuments( chunks.map((chunk) => chunk.pageContent.replace(/\n/g, " ")) ); console.log("Finished embedding documents"); console.log( Creating ${chunks.length} vectors array with id, values, and metadata... );

[Elindo586]

My solution was not to use langchain.

I just used Open AI directly. There is also good community support forum for Open AI

[nafisholeh]

@Elindo586 in NextJS, there is a restriction on environment variables exposed to client side as per official docs here. We need to add prefix NEXT_PUBLIC to OpenAI api key. In my case I need to manually set the apiKey:

new ChatOpenAI({ apiKey: process.env.NEXT_PUBLIC_OPENAI_API_KEY })

But this poses security risk as it exposed the api key to browser.

[NicolaiSchmid]

This will expose your API key to the public and to abuse from people scanning for it in your frontend code on the internet

[yorrd]

The langchain API will automatically look for OPENAI_API_KEY in youro env as far as I can tell. Just make it available through bash OPENAI_API_KEY=... node server.js or use dotenv. The OP seems to have an issue with their dotenv setup. Happy to assist if more information on the runtime is provided, but that's the good practice way to do it afaict.

[coreymunn3]

Hey everyone, I thought I would chime in here. I was having this exact same problem in a Next 14.2 project, and then I realized that I had called my .env.local variable OPEN_AI_API_KEY instead of OPENAI_API_KEY. Please note the additional underscore between OPEN and AI. apparently OPENAI is one word and if it's not that exact var name, the langchain library will not be able to find it.