News, tutorials, and insights from the LocalStack team on cloud emulation, product showcases, and local development practices.https://blog.localstack.cloud/https://blog.localstack.cloud/how-to-build-your-own-localstack-extension/https://blog.localstack.cloud/how-to-build-your-own-localstack-extension/LocalStack Extensions can facilitate specialized workflows or development needs. This guide walks through using LocalStack's Extensions API to create a mock API for Anthropic, a popular LLM provider, that allows you to test your application code without relying on the live service.Thu, 16 Apr 2026 00:00:00 GMT