Claude 4.5 API Examples for PoYo

Focused server-side examples for building with the Claude 4.5 model family on PoYo.

Claude 4.5 is useful when teams need coding, agent, document, and assistant workflows with a clear path across Opus, Sonnet, and Haiku variants.

Try on PoYo | Get API Key | Docs | Pricing | Main Examples

What This Repo Covers

• Claude Messages API requests with claude-sonnet-4-5-20250929
• Upgrade paths to Opus and Haiku 4.5 variants
• Server-side API key handling
• Node.js backend example
• Prompt examples and production integration notes

Quick Start

cp .env.example .env
export POYO_API_KEY="your-api-key"

Run the Node.js example:

cd node
npm start

Keep POYO_API_KEY on the server. Do not expose it in browser code, mobile apps, screenshots, or public logs.

Production Pattern

• Keep POYO_API_KEY on the server
• Send a Messages API request
• Log model, latency, and usage for cost tracking
• Route Opus, Sonnet, and Haiku intentionally

Models

This repo uses claude-opus-4-5-20251101, claude-sonnet-4-5-20250929, claude-haiku-4-5-20251001.

Examples

Path	What it covers
curl/generate.md	Copy-paste API request.
node/	Native Node.js backend example.
docs/prompt-examples.md	Practical prompts for product workflows and creative tests.
docs/production-notes.md	Security and reliability notes before launch.

Run Checks

make check

On Windows:

./scripts/check.ps1

License

MIT