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Val.town RAG Endpoint\n// POST /rag with JSON body: { \"question\": \"your question here\" }\n// Required header: x-api-key: \n\nimport { OpenAI } from \"npm:openai@4\";\nimport { Pinecone } from \"npm:@pinecone-database/pinecone@3\";\nimport Anthropic from \"npm:@anthropic-ai/sdk@0.27\";\n\n// Env vars\nconst AUTH_TOKEN = Deno.env.get(\"AUTH_TOKEN\");\nconst OPENAI_API_KEY = Deno.env.get(\"OPENAI_API_KEY\");\nconst PINECONE_API_KEY = Deno.env.get(\"PINECONE_API_KEY\");\nconst PINECONE_INDEX_NAME = Deno.env.get(\"PINECONE_INDEX_NAME\") ||\n \"aws-ring-embeddings-small\";\nconst PINECONE_DIMENSIONS = parseInt(\n Deno.env.get(\"PINECONE_DIMENSIONS\") || \"1536\",\n);\nconst OPENAI_EMBEDDINGS_MODEL = Deno.env.get(\"OPENAI_EMBEDDINGS_MODEL\") ||\n \"text-embedding-3-small\";\nconst ANTHROPIC_API_KEY = Deno.env.get(\"ANTHROPIC_API_KEY\");\n\n// Validate required environment variables\nif (!OPENAI_API_KEY) {\n throw new Error(\"OPENAI_API_KEY environment variable is required\");\n}\nif (!PINECONE_API_KEY) {\n throw new Error(\"PINECONE_API_KEY environment variable is required\");\n}\nif (!ANTHROPIC_API_KEY) {\n throw new Error(\"ANTHROPIC_API_KEY environment variable is required\");\n}\nif (!AUTH_TOKEN) {\n throw new Error(\"AUTH_TOKEN environment variable is required\");\n}\n\n// Clients (reused across invocations)\nconst openai = new OpenAI({ apiKey: OPENAI_API_KEY });\nconst pinecone = new Pinecone({ apiKey: PINECONE_API_KEY });\nconst anthropic = new Anthropic({ apiKey: ANTHROPIC_API_KEY });\n\nconst index = pinecone.index(PINECONE_INDEX_NAME);\n\n// --- helpers -------------------------------------------------------\n\nasync function embedQuestion(question: string): Promise {\n const response = await openai.embeddings.create({\n model: OPENAI_EMBEDDINGS_MODEL,\n input: question,\n dimensions: PINECONE_DIMENSIONS,\n });\n return response.data[0].embedding;\n}\n\nasync function queryDatabase(embedding: number[]): Promise {\n const maxAttempts = 3;\n\n for (let attempt = 1; attempt <= maxAttempts; attempt++) {\n try {\n const results = await index.query({\n vector: embedding,\n topK: 2,\n includeMetadata: true,\n });\n\n const contexts = results.matches\n .map((match: any) => {\n const question = match.metadata?.question || \"\";\n const answer = match.metadata?.answer || \"\";\n if (question && answer) {\n return `Question: ${question}\\nAnswer: ${answer}`;\n }\n return \"\";\n })\n .filter((content: string) => content.length > 0);\n\n return contexts.join(\"\\n\\n\");\n } catch (err: any) {\n console.error(\n `[RAG] Pinecone query error on attempt ${attempt}:`,\n err?.message,\n );\n if (attempt === maxAttempts) throw err;\n await new Promise((r) => setTimeout(r, 200 * attempt)); // simple backoff\n }\n }\n\n return \"\";\n}\n\nasync function generateResponse(\n question: string,\n context: string,\n): Promise {\n const systemPrompt = `**Generate Response to User Query**\n**Step 1: Parse Context Information**\nExtract and utilize relevant knowledge from the provided context within \\`\\` XML tags.\nThe context contains context that is possibly relevant to the user's query.\n\n**Step 2: Analyze User Query**\nCarefully read and comprehend the user's query and intent behind the question.\n\n**Step 3: Determine Response**\nIf the answer to the user's query can be directly inferred from the context information, provide a concise and accurate response matching as closely to the context as possible.\nIf the answer is not found in the context, return \"I'm sorry, but unfortunately I don't have the answer to that question. I can transfer to someone who can better help you with that\".\n\n**Step 4: Generate Response**\nDo not repeat the question in the response. The response should match the format of the context as closely as possible.`;\n\n const userPrompt = `**Generate Response to User Query**\nUser Query: ${question}\n\n\n${context}\n`;\n\n const response = await anthropic.messages.create({\n model: \"claude-haiku-4-5\",\n max_tokens: 300,\n system: systemPrompt,\n messages: [\n {\n role: \"user\",\n content: userPrompt,\n },\n ],\n });\n\n return response.content[0].type === \"text\" ? response.content[0].text : \"\";\n}\n\n// generic timer wrapper\nasync function timeStep(\n label: string,\n fn: () => Promise,\n): Promise<{ result: T; ms: number }> {\n const start = performance.now();\n const result = await fn();\n const ms = performance.now() - start;\n console.log(`[RAG] ${label} ms:`, ms.toFixed(2));\n return { result, ms };\n}\n\n// --- main handler --------------------------------------------------\n\nexport default async function (req: Request): Promise {\n const startTime = performance.now();\n\n // timings we’ll fill as we go\n const timings: {\n total_seconds?: number;\n embed_ms?: number;\n pinecone_query_ms?: number;\n anthropic_ms?: number;\n } = {};\n\n try {\n // Auth\n const apiKey = req.headers.get(\"x-api-key\");\n if (!apiKey) {\n return Response.json(\n { error: \"Missing API key. Please provide x-api-key header\" },\n { status: 401 },\n );\n }\n if (apiKey !== AUTH_TOKEN) {\n return Response.json(\n { error: \"Invalid API key\" },\n { status: 401 },\n );\n }\n\n // Method check\n if (req.method !== \"POST\") {\n return Response.json(\n { error: \"Only POST requests are accepted\" },\n { status: 405 },\n );\n }\n\n // Parse body\n const body = await req.json();\n const question = body.question;\n\n if (!question || typeof question !== \"string\") {\n return Response.json(\n { error: \"Question is required and must be a string\" },\n { status: 400 },\n );\n }\n\n // Step 1: embeddings\n const { result: embedding, ms: embedMs } = await timeStep(\n \"embedQuestion\",\n () => embedQuestion(question),\n );\n timings.embed_ms = embedMs;\n\n // Step 2: Pinecone\n const { result: context, ms: pineconeMs } = await timeStep(\n \"queryDatabase\",\n () => queryDatabase(embedding),\n );\n timings.pinecone_query_ms = pineconeMs;\n\n // Step 3: Anthropic\n const { result: answer, ms: anthropicMs } = await timeStep(\n \"generateResponse\",\n () => generateResponse(question, context),\n );\n timings.anthropic_ms = anthropicMs;\n\n // Total\n const totalSeconds = (performance.now() - startTime) / 1000;\n timings.total_seconds = parseFloat(totalSeconds.toFixed(3));\n\n return Response.json({\n question,\n answer,\n context_length: context.length,\n timings,\n });\n } catch (error: any) {\n const totalSeconds = (performance.now() - startTime) / 1000;\n timings.total_seconds = parseFloat(totalSeconds.toFixed(3));\n\n console.error(\n `[RAG] Request failed after ${timings.total_seconds}s:`,\n error,\n );\n\n return Response.json(\n {\n error: error?.message || \"Internal server error\",\n timings,\n },\n { status: 500 },\n );\n }\n}","deleted","label","vapi-dropbox-demo",[117],"pulls",1,"forks","envVars",{"_140":142,"_143":53},"connections",{"_140":53,"_141":53},"count","unfilledCount",7,"emptyCount",{"_20":116,"_13":117,"_118":47,"_119":-5,"_120":21,"_121":30,"_122":49,"_22":145,"_29":124,"_125":126,"_127":128,"_129":38,"_130":131,"_146":147,"_92":148},["D",1764896529468],"children",[],[117],["D",1764800915512],["D",1789602669626],{"_11":12,"_90":86},{"_11":12,"_84":-5,"_85":86,"_44":45,"_87":88,"_89":38},{"_29":30,"_13":26,"_20":21,"_27":28,"_31":-5,"_32":-5,"_79":-5,"_80":-5,"_81":-5,"_82":14,"_83":12},"ctx",{"_72":-5,"_112":187,"_188":189,"_190":191,"_192":38,"_193":38,"_194":38,"_195":49,"_196":-5,"_197":-7,"_198":-7,"_199":53,"_200":38,"_201":38,"_202":-5,"_203":38,"_204":38,"_205":38,"_206":-5},"ENV",{"_158":159,"_160":161,"_162":26,"_163":164,"_165":166,"_167":168,"_169":170,"_171":172,"_173":174,"_175":176,"_177":178,"_179":180,"_181":182,"_183":184,"_185":186},"REACT_APP_SENTRY_DSN","https://586020d86f05489db63a554690acf1e9@o1398359.ingest.sentry.io/6724499","RENDER_GIT_COMMIT","c73f21da490985bff19c279eb0e09db24d688e4f","RENDER_GIT_BRANCH","POSTHOG_API_TOKEN","phc_nmoyuAkStEZuUp69rYlg1DZgrIt19Gx0Y4Hwf8tGgJP","POSTHOG_API_HOST","https://wart.val.town","WEB_API_TEMPLATE","https://{val}.web.val.run","APP_URL","https://www.val.town","MODULE_URL","https://esm.town","VANITY_WEB_API_TEMPLATE","https://{label}.val.run/","DENOLS_URL","https://lsp.val.town","NODE_ENV","production","CLOUDFLARE_TURNSTILE_SITE_KEY","0x4AAAAAACtaIZJH7s9rBMZ6","GOOGLE_CLIENT_ID","875989696899-jtsqkhlbdv5jrlsk8631p7ipjg3c6o62.apps.googleusercontent.com","STRIPE_PUBLISHABLE_KEY","pk_live_51N2zvWEpZTTLipIkVEwXrUG9AT0yeOOEYxszarZT1jpsZV58Ly6wlg3SltZpHN26CUalOBmUSY7adQRQiSkCZz2500qSXNkf8Y","API_URL","https://api.val.town",[],"preferencesKeybindings","default","preferencesTheme","light","preferencesFixers","preferencesCopilot","preferencesSelectionAi","preferencesCloseBrackets","preferencesChatPanelState","preferencesDprint","preferencesDenofmt","notificationCount","flagDenols","isBusinessOrgMember","businessOrgHandle","isBusinessOrgAdmin","isHigherTownieTier","navCollapsed","currentOrgId"]

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