✨ Powered by Amazon Bedrock

GenAI Chat
Platform

A serverless AI chat application built on AWS. Converse with Claude foundation models through a secure, production-grade interface.

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5 Claude Models

Haiku to Opus — pick the right model for every task

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Usage Analytics

Track tokens, cost, and usage per user and model

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Secure by Default

Cognito auth, CloudFront CDN, private S3 origin

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Serverless Stack

Lambda + API Gateway — zero servers to manage

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Welcome Back

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Available Models
Haiku 4.5 Sonnet 4.5 Sonnet 4.6 Opus 4.5 Opus 4.6
CloudFront · Lambda · Bedrock · DynamoDB

🤖 GenAI Chat

⚠️ Rate limit reached. Retrying in 5s — or switch to a different model.

Hello!

I'm powered by Amazon Bedrock. Send me a message and I'll respond using Claude.

Application Architecture

🧑‍💻 User Browser 🛡️ WAF Web ACL Managed Rules ☁️ CloudFront CDN Distribution /* → S3 /api/* → API Gateway 🪣 S3 Bucket Static Frontend HTML / CSS / JS 🔐 Cognito User Pool OAuth2 / JWT 🔀 API Gateway REST API /api/chat · /api/usage Cognito Authorizer ⚡ Lambda Node.js 22 (ARM64) Chat + Usage API 🧠 Bedrock Converse API Claude Models 📊 DynamoDB Usage Tracking Per-user / Per-model 💰 Cost Explorer Billing Data Actual AWS Cost HTTPS Allow OAC /api/* Proxy Converse Track Query cost Validate JWT Login redirect

🛡️ AWS WAF

Web Application Firewall protecting the CloudFront distribution with AWS managed rule groups and rate limiting.

☁️ CloudFront

CDN distribution with three behaviors: default serves static files from S3, /api/chat and /api/usage route to API Gateway. HTTPS enforced, HTTP/2 enabled. WAF-protected. Host-based access control (custom domain only).

🪣 S3 Bucket

Private S3 bucket hosts the static SPA frontend. All public access blocked — served exclusively through CloudFront via Origin Access Control (OAC).

🔐 Cognito

Shared Cognito user pool with OAuth2 authorization code flow. Browser redirects to Cognito Hosted UI, exchanges code for JWT tokens. No client secret (public SPA client).

🔀 API Gateway

Regional REST API with Cognito authorizer validating JWT on every request. POST /api/chat for conversations, GET /api/usage for analytics. CORS enabled with gateway response headers.

⚡ Lambda

Node.js 22 on ARM64 (Graviton). Handles chat (Bedrock Converse), usage tracking (DynamoDB writes), and usage queries (DynamoDB reads + Cost Explorer).

🧠 Amazon Bedrock

Converse API with US inference profiles. 5 Claude models from Haiku 4.5 to Opus 4.6. User selects model per-message. Throttle detection with graceful retry.

📊 DynamoDB

Usage tracking table with per-user, per-model, per-month granularity. Tracks input/output tokens and request counts. PAY_PER_REQUEST billing.

💰 Cost Explorer

Queried for actual AWS Bedrock billing data. Provides real cost alongside token-based estimates. Data has 24–48h delay from AWS.

📊 Monthly Usage

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Requests
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Input Tokens
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Output Tokens
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Estimated Cost
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Actual Bedrock Cost
Breakdown by Model
Model Requests Input Tokens Output Tokens Est. Cost
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Breakdown by User
User Requests Input Tokens Output Tokens Est. Cost
Switch to "All Users" view