# Fastify

Fastify is a fast, low-overhead web framework for Node.js with plugin architecture and schema-based validation.

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## Build an AI Voice Assistant with Twilio Voice and Media Streams, OpenAI's GPT-Live API, and Node.js

DevFeed: [Build an AI Voice Assistant with Twilio Voice and Media Streams, OpenAI's GPT-Live API, and Node.js](<https://devfeed.tech/articles/build-an-ai-voice-assistant-with-twilio-voice-and-media-streams-openai-s-gpt-live-api-and-node-js-16093.md>)

Original publisher: [Read original article](<https://www.twilio.com/en-us/blog/developers/tutorials/integrations/voice-ai-assistant-openai-gpt-live-1-node>)

Author: Paul Kamp

Published: 2026-09-10T00:00:00Z

Content type: tutorial

Language: en

Sources: [Twilio Blog](<https://devfeed.tech/sources/twilio-blog.md>)

Topics: [Artificial Intelligence](<https://devfeed.tech/topics/ai.md>), [Node.js](<https://devfeed.tech/topics/node-js.md>), [OpenAI](<https://devfeed.tech/topics/openai.md>), [Streams](<https://devfeed.tech/topics/streams.md>), [API](<https://devfeed.tech/topics/api.md>), [WebSocket](<https://devfeed.tech/topics/websocket.md>), [Fastify](<https://devfeed.tech/topics/fastify.md>), [API keys](<https://devfeed.tech/topics/api-keys.md>), [.env](<https://devfeed.tech/topics/dotenv.md>)

Tags: [ai](<https://devfeed.tech/tags/ai.md>), [api](<https://devfeed.tech/tags/api.md>), [audio](<https://devfeed.tech/tags/audio.md>), [developer-insights](<https://devfeed.tech/tags/developer-insights.md>), [env-file-security](<https://devfeed.tech/tags/env-file-security.md>), [js](<https://devfeed.tech/tags/js.md>), [ngrok](<https://devfeed.tech/tags/ngrok.md>), [node-js](<https://devfeed.tech/tags/node-js.md>), [openai](<https://devfeed.tech/tags/openai.md>), [sign-up](<https://devfeed.tech/tags/sign-up.md>), [streams](<https://devfeed.tech/tags/streams.md>)

### AI overview

This tutorial explains how to build an AI voice assistant that answers phone calls using Twilio Programmable Voice and Media Streams, OpenAI's GPT-Live-1 API, and a Node.js server. It also covers web search and custom function tool calls.

### Source excerpt

Build an AI voice assistant that answers a phone call with Twilio Programmable Voice and Media Streams, powered by OpenAI's GPT-Live-1.

## Building Svitgrid, a Solar Monitoring Platform for Home Systems

DevFeed: [Building Svitgrid, a Solar Monitoring Platform for Home Systems](<https://devfeed.tech/articles/how-i-built-monitoring-for-my-home-solar-system-and-why-you-might-need-it-too-20852.md>)

Original publisher: [Read original article](<https://ivanursul.com/building-svitgrid-solar-monitoring>)

Author: Ivan Ursul

Published: 2026-05-21T00:00:00Z

Content type: article

Language: en

Sources: [Ivan Ursul](<https://devfeed.tech/sources/ivan-ursul.md>)

Topics: [Monitoring](<https://devfeed.tech/topics/monitoring.md>), [dashboards](<https://devfeed.tech/topics/dashboards.md>), [real-time](<https://devfeed.tech/topics/real-time.md>), [Fastify](<https://devfeed.tech/topics/fastify.md>), [Flutter](<https://devfeed.tech/topics/flutter.md>), [Modbus](<https://devfeed.tech/topics/modbus.md>), [TypeScript](<https://devfeed.tech/topics/typescript.md>), [Cloud Run](<https://devfeed.tech/topics/cloud-run.md>), [ESP-IDF](<https://devfeed.tech/topics/esp-idf.md>), [ESP32-S3](<https://devfeed.tech/topics/esp32-s3.md>), [Firestore](<https://devfeed.tech/topics/firestore.md>), [Mobile](<https://devfeed.tech/topics/mobile.md>)

Tags: [android](<https://devfeed.tech/tags/android.md>), [battery](<https://devfeed.tech/tags/battery.md>), [cloud-run](<https://devfeed.tech/tags/cloud-run.md>), [energy-monitoring](<https://devfeed.tech/tags/energy-monitoring.md>), [esp-idf](<https://devfeed.tech/tags/esp-idf.md>), [esp32](<https://devfeed.tech/tags/esp32.md>), [esp32-s3](<https://devfeed.tech/tags/esp32-s3.md>), [firestore](<https://devfeed.tech/tags/firestore.md>), [flutter](<https://devfeed.tech/tags/flutter.md>), [gcp](<https://devfeed.tech/tags/gcp.md>), [iot](<https://devfeed.tech/tags/iot.md>), [java](<https://devfeed.tech/tags/java.md>), [migrations](<https://devfeed.tech/tags/migrations.md>), [mobile](<https://devfeed.tech/tags/mobile.md>), [modbus](<https://devfeed.tech/tags/modbus.md>), [mongodb](<https://devfeed.tech/tags/mongodb.md>), [monitoring](<https://devfeed.tech/tags/monitoring.md>), [real-time](<https://devfeed.tech/tags/real-time.md>), [side-project](<https://devfeed.tech/tags/side-project.md>), [solar](<https://devfeed.tech/tags/solar.md>), [typescript](<https://devfeed.tech/tags/typescript.md>), [web](<https://devfeed.tech/tags/web.md>)

### AI overview

This article explains how Svitgrid, a solar monitoring platform for residential systems, was built. It covers the product's goals, cross-platform clients, cloud backend, ESP32-S3 edge hardware, inverter data paths, and support for multiple inverter systems over Modbus TCP.

### Source excerpt

Svitgrid dashboard: real-time power flow from PV to battery, home, and grid

## Fastify v5 breaking changes: should you upgrade?

DevFeed: [Fastify v5 breaking changes: should you upgrade?](<https://devfeed.tech/articles/fastify-v5-breaking-changes-should-you-upgrade-17798.md>)

Original publisher: [Read original article](<https://encore.dev/blog/fastify-v5>)

Author: André Eriksson

Published: 2024-09-17T00:00:00Z

Content type: opinion

Language: en

Sources: [Encore Updates](<https://devfeed.tech/sources/encore-updates.md>)

Topics: [Fastify](<https://devfeed.tech/topics/fastify.md>), [Framework](<https://devfeed.tech/topics/framework.md>), [benchmarking](<https://devfeed.tech/topics/benchmarking.md>)

Tags: [deprecated](<https://devfeed.tech/tags/deprecated.md>), [migration-guide](<https://devfeed.tech/tags/migration-guide.md>), [performance](<https://devfeed.tech/tags/performance.md>), [release](<https://devfeed.tech/tags/release.md>), [upgrade](<https://devfeed.tech/tags/upgrade.md>)

### AI overview

This opinion article examines Fastify v5 and argues that upgrading may not be worthwhile for most users. It highlights roughly 20 breaking changes, reduced convenience in JSON Schema definitions, sparse documentation about upgrade benefits, support for the Diagnostic Channel API, and a reported 5-10% performance improvement over v4 depending on configuration and schema validation.

### Source excerpt

Spoiler alert: probably not.

## Fastify plugins as building blocks for a backend Node.js API

DevFeed: [Fastify plugins as building blocks for a backend Node.js API](<https://devfeed.tech/articles/fastify-plugins-as-building-blocks-for-a-backend-node-js-api-7915.md>)

Original publisher: [Read original article](<https://snyk.io/blog/fastify-plugins-for-backend-node-js-api/>)

Author: Liran Tal

Published: 2024-05-28T05:00:00Z

Content type: article

Language: en

Sources: [Blog RSS Feed | Snyk](<https://devfeed.tech/sources/blog-rss-feed-snyk.md>)

Topics: [Fastify](<https://devfeed.tech/topics/fastify.md>), [Node.js](<https://devfeed.tech/topics/node-js.md>), [Back end](<https://devfeed.tech/topics/backend.md>), [API](<https://devfeed.tech/topics/api.md>), [Application Development](<https://devfeed.tech/topics/application-development.md>), [async/await](<https://devfeed.tech/topics/async-await.md>), [Promise](<https://devfeed.tech/topics/promise.md>), [Routing (disambiguation)](<https://devfeed.tech/topics/routing.md>), [Open Source](<https://devfeed.tech/topics/open-source.md>)

Tags: [api](<https://devfeed.tech/tags/api.md>), [application-security](<https://devfeed.tech/tags/application-security.md>), [architecture](<https://devfeed.tech/tags/architecture.md>), [awareness](<https://devfeed.tech/tags/awareness.md>), [backend](<https://devfeed.tech/tags/backend.md>), [blog](<https://devfeed.tech/tags/blog.md>), [blog-post](<https://devfeed.tech/tags/blog-post.md>), [code](<https://devfeed.tech/tags/code.md>), [developer](<https://devfeed.tech/tags/developer.md>), [devrel](<https://devfeed.tech/tags/devrel.md>), [ecosystem](<https://devfeed.tech/tags/ecosystem.md>), [javascript](<https://devfeed.tech/tags/javascript.md>), [node](<https://devfeed.tech/tags/node.md>), [node-js](<https://devfeed.tech/tags/node-js.md>), [performance](<https://devfeed.tech/tags/performance.md>), [plugin](<https://devfeed.tech/tags/plugin.md>), [routing](<https://devfeed.tech/tags/routing.md>), [snyk-code](<https://devfeed.tech/tags/snyk-code.md>), [snyk-open-source](<https://devfeed.tech/tags/snyk-open-source.md>), [speed](<https://devfeed.tech/tags/speed.md>), [web](<https://devfeed.tech/tags/web.md>), [web-applications](<https://devfeed.tech/tags/web-applications.md>), [web-development](<https://devfeed.tech/tags/web-development.md>)

### AI overview

This article presents Fastify and its plugin ecosystem as building blocks for backend Node.js APIs. It discusses Fastify's low overhead, performance-oriented architecture, open source community, native ECMAScript module support, async/await route definitions, promise-based asynchronous code, and radix-tree routing for efficient request handling.

### Source excerpt

This blog post will focus on the foundational building blocks of building backend Node.js APIs using Fastify and its recommended plugins in 2024.

## Build Well-Documented and Authenticated APIs in Node.js with Fastify

DevFeed: [Build Well-Documented and Authenticated APIs in Node.js with Fastify](<https://devfeed.tech/articles/build-well-documented-and-authenticated-apis-in-node-js-with-fastify-26379.md>)

Original publisher: [Read original article](<https://www.heroku.com/blog/build-openapi-apis-nodejs-fastify/>)

Author: Julián Duque

Published: 2024-04-29T23:25:00Z

Content type: tutorial

Language: en

Sources: [Heroku](<https://devfeed.tech/sources/heroku.md>)

Topics: [Fastify](<https://devfeed.tech/topics/fastify.md>), [API](<https://devfeed.tech/topics/api.md>), [Node.js](<https://devfeed.tech/topics/node-js.md>), [Authentication](<https://devfeed.tech/topics/authentication.md>), [JSON Web Tokens](<https://devfeed.tech/topics/jwt.md>), [OpenAPI Specification](<https://devfeed.tech/topics/openapi.md>), [Heroku](<https://devfeed.tech/topics/heroku.md>), [Postman](<https://devfeed.tech/topics/postman.md>), [Swagger](<https://devfeed.tech/topics/swagger.md>), [Back end](<https://devfeed.tech/topics/backend.md>)

Tags: [apis](<https://devfeed.tech/tags/apis.md>), [authentication](<https://devfeed.tech/tags/authentication.md>), [back-end](<https://devfeed.tech/tags/back-end.md>), [build](<https://devfeed.tech/tags/build.md>), [engineering](<https://devfeed.tech/tags/engineering.md>), [express](<https://devfeed.tech/tags/express.md>), [framework](<https://devfeed.tech/tags/framework.md>), [heroku](<https://devfeed.tech/tags/heroku.md>), [how-to](<https://devfeed.tech/tags/how-to.md>), [javascript](<https://devfeed.tech/tags/javascript.md>), [jwt](<https://devfeed.tech/tags/jwt.md>), [node-js](<https://devfeed.tech/tags/node-js.md>), [openapi](<https://devfeed.tech/tags/openapi.md>), [postman](<https://devfeed.tech/tags/postman.md>), [product-features](<https://devfeed.tech/tags/product-features.md>), [swagger](<https://devfeed.tech/tags/swagger.md>)

### AI overview

A hands-on walkthrough for building a documented and authenticated API with Node.js and Fastify. It covers JWT authentication, Fastify Swagger plugins for generating an OpenAPI specification, Postman as an API client, and deployment to Heroku.

### Source excerpt

If you're an API developer working with Node.js, then you're probably familiar with Express. But have you tried out the Fastify framework to build with power, speed, and convenience? In this walkthrough, we build a full-featured, easy-to-consume API with Fastify. And we deploy it to the cloud with ease. We show you how to: Get [...] The post Build Well-Documented and Authenticated APIs in Node.js with Fastify appeared first on Heroku.

## Investigating Node.js Performance: Fastify, Express, and Memory-Heavy Log Redaction

DevFeed: [Investigating Node.js Performance: Fastify, Express, and Memory-Heavy Log Redaction](<https://devfeed.tech/articles/how-to-substantially-slow-down-your-node-js-server-28028.md>)

Original publisher: [Read original article](<https://tech.trivago.com/post/2022-09-15-how-to-substantially-slow-down-your-nodejs-server/>)

Author: Abdelrahman Abdelhafez Human code formatter @ trivago GitHub profile

Published: 2022-09-15T00:00:00Z

Content type: tutorial

Language: en

Sources: [Trivago](<https://devfeed.tech/sources/trivago.md>)

Topics: [Node.js](<https://devfeed.tech/topics/node-js.md>), [Fastify](<https://devfeed.tech/topics/fastify.md>), [Express](<https://devfeed.tech/topics/express.md>), [GraphQL](<https://devfeed.tech/topics/graphql.md>), [JavaScript](<https://devfeed.tech/topics/javascript.md>), [V8](<https://devfeed.tech/topics/v8.md>), [debugging](<https://devfeed.tech/topics/debugging.md>)

Tags: [backend](<https://devfeed.tech/tags/backend.md>), [engineering](<https://devfeed.tech/tags/engineering.md>), [express](<https://devfeed.tech/tags/express.md>), [framework](<https://devfeed.tech/tags/framework.md>), [gdpr](<https://devfeed.tech/tags/gdpr.md>), [graphql](<https://devfeed.tech/tags/graphql.md>), [load-testing](<https://devfeed.tech/tags/load-testing.md>), [node](<https://devfeed.tech/tags/node.md>), [node-js](<https://devfeed.tech/tags/node-js.md>), [performance](<https://devfeed.tech/tags/performance.md>), [profiling](<https://devfeed.tech/tags/profiling.md>), [server](<https://devfeed.tech/tags/server.md>), [v8](<https://devfeed.tech/tags/v8.md>)

### AI overview

This technical investigation examines why migrating a monolithic Node.js GraphQL server from Express to Fastify produced no production performance improvement despite substantially faster staging load-test results. Live V8 heap profiling identified log redaction as consuming large amounts of memory.

### Source excerpt

Back in March 2022, after spending a considerable amount of effort migrating our monolithic Node.js GraphQL server from

## Supabase Beta March 2021

DevFeed: [Supabase Beta March 2021](<https://devfeed.tech/articles/supabase-beta-march-2021-596.md>)

Original publisher: [Read original article](<https://supabase.com/blog/supabase-beta-march-2021>)

Author: Paul Copplestone

Published: 2021-04-06T07:00:00Z

Content type: release

Language: en

Sources: [Supabase Blog](<https://devfeed.tech/sources/supabase-blog.md>)

Topics: [Supabase](<https://devfeed.tech/topics/supabase.md>), [Command-line interface](<https://devfeed.tech/topics/cli.md>), [Amazon S3](<https://devfeed.tech/topics/amazon-s3.md>), [Fastify](<https://devfeed.tech/topics/fastify.md>), [Docker](<https://devfeed.tech/topics/docker.md>)

Tags: [cli](<https://devfeed.tech/tags/cli.md>), [launch](<https://devfeed.tech/tags/launch.md>), [pricing](<https://devfeed.tech/tags/pricing.md>), [storage](<https://devfeed.tech/tags/storage.md>)

### AI overview

Supabase's March 2021 beta update announces Storage backed by S3, a CLI for running Supabase locally, bundled PgBouncer for direct database connections, an open-source React UI component library, pricing plans, OAuth scopes, and dashboard, documentation, and website updates.

### Source excerpt

Launch week, Storage, Supabase CLI, Connection Pooling, Supabase UI, and Pricing.