claude-api

Streaming with Claude API uses server-sent events (SSE) to receive message tokens incrementally. Install the Claude SDK, pass `stream: true` to the message creation call, and iterate over the streamed events in Node.js or Next.js. This reduces perceived latency and enables real-time token delivery to clients.

Prompt caching stores frequently reused context (system prompts, documents, code) server-side so repeated requests skip reprocessing. Add `cache_control: { type: 'ephemeral' }` to message blocks in your API calls. Cached tokens cost 90% less, significantly reducing costs for applications with repetitive inputs.

Yes, Claude's tool-calling capability works with Cloudflare Workers using the Claude SDK. Define tools in your schema, handle tool use in the API response, and execute them server-side. The Skill provides Cloudflare Workers templates with strict input validation and production-grade error handling.

Implement exponential backoff to retry requests when rate limits trigger. The Claude API returns rate-limit headers; catch these errors and wait with increasing delays between retries. Production deployments require mandatory `max_tokens` and versioned models to prevent unexpected behavior and quota overages.

Production deployments require server-side API key management, mandatory `max_tokens` per request, versioned models (e.g., claude-3-5-sonnet-20241022), rate-limit resilience with exponential backoff, and cache_control placement for prompt caching. The Skill provides templates for Node.js, Next.js, and direct API usage.

Claude's vision capability processes images in API requests across Node.js, Next.js, Cloudflare Workers, and direct API usage. The Skill includes vision patterns and templates for production deployment with proper error handling and validation.