Simplicity at Speed
One framework to power them all. Write your HTTP APIs once and get end-to-end typed integrations for 15 languages, instant Admin UIs, queryable data APIs and safe AI capabilities - all generated from the same typed Request DTOs.
- 15
- Typed client languages
- 12+
- Built-in Admin UIs
- .NET | Framework
- Runs everywhere .NET does
ServiceStack APIsAPIs
Latest from the blog
Release announcements, deep dives and tutorials
Gemini RAG - AI Answers Customers can Verify from your Content
Turn the files, docs and websites you already maintain into managed knowledge bases, then publish a citation-backed AI Assistant and instant, model-free Website Search to any site with one script tag
ServiceStack PDF Studio — From AI Design to Production PDFs
Design Typst PDFs with AI Chat, publish validated templates, generate typed C# models and render production documents from your ServiceStack APIs
Instant CRUD Apps with AutoQuery Schemas
Give AutoQuerySchema one /auto/{DataModel}.json document and it renders a complete, authorized CRUD application
Everything from one API contract
Declare your APIs once, the rest is Free.
Your typed Request DTOs are the single source of truth - every client, UI, schema and AI capability is generated from them.
Typed APIs in 15 Languages
Native DTOs and a feature-rich Service Client for C#, TypeScript, Python, Go, Rust, Ruby, Zig, Swift, Kotlin, Dart and more - no hand-written SDKs.
Add ServiceStack ReferenceAutoQuery
One line of C# gives you a fully queryable, paged, filterable and authorized Query & CRUD API over your RDBMS - then renders its own admin UI.
Explore AutoQueryBuilt-in UIs
A suite of Admin UIs, API Explorer and Locode in every App - users, roles, API keys, logging, profiling, background jobs, analytics and database browsing.
See the Built-in UIsAI Chat & API Tools
A complete AI application inside your App, with your existing users - and your own APIs safely exposed as AI capabilities behind human approval.
Discover AI ChatProject Templates
Production-ready starting points for React, Vue, Blazor, Angular, Razor Pages, MVC and Flutter - each with Identity Auth and AutoQuery pre-configured.
Browse templatesPDF Studio
Design documents with AI and a live preview, then render them deterministically in production from an ordinary ServiceStack API - no LLM in the hot path.
See PDF StudioStart here
Start from a template, not a blank page
Every template ships on .NET 10 with Identity Auth, AutoQuery, the Built-in UIs and a Docker deployment pipeline already wired up - so your first commit can ship to a real server.
$npx create-net ls
Write once, integrate from anywhere
Also available over gRPC
The same Services, on HTTP/2
Your existing typed Services are available from ASP.NET's gRPC endpoints without rewriting them — giving you high-performance HTTP/2 APIs and generated gRPC clients alongside your native HTTP integrations.
ServiceStack.AI.Chat
Your own AI Assistant, living inside your App
Stop sending your users out to external agents and third-party chat apps. A full-featured AI Assistant runs inside the App you already have - signing in with your users, calling your APIs, answering from your documents and powered by whichever models you prefer.
Self-hosted in your App
Your preferred models
Your users, APIs & data
No external agents
01 · AI Chat
/chat
A full-featured AI Assistant at home in your App
Chat, agents, tools, skills, projects and analytics at your App's own URL - no external agent, SaaS seat or second user directory in the loop.
- Bring your preferred models - OpenAI, Anthropic, Google or a local Ollama
- Signs in with the users, roles and API keys your App already has
- Your APIs become AI tools, with human approval before any write
02 · Gemini RAG
/rag
Your documents. Answers you can verify.
Import files, folders and entire websites once - then publish a cited AI Assistant and instant site search from the same content.
- Every answer cites the real page it came from
- One script tag embeds a grounded assistant on any site
- Keystroke-fast search with no model call and no per-query cost
03 · PDF Studio
/pdf
Describe the PDF. Ship the C# class.
Design invoices, certificates and reports in plain English against a live preview, then render them from strongly-typed C#.
- Rebuild the documents you already send from a screenshot or PDF
- Typed C# models generated from every published template
- Pixel-identical output with no API key or model in production
$npx add-in chat
All three start from one command - get started
New in v10.1
Your existing APIs become safe AI capabilities
No second AI backend. No parallel schema. No new identity silo. AI Chat runs inside your App, acting as the signed-in user, with an editable approval form in front of anything consequential.
AI Chat v4
Register ChatFeature and your users get a complete AI application at /chat - every major model provider behind one selector, documents, voice, images, RAG and per-user projects. All within your App boundary.
API Tools & MCP
Three stable tools - search, describe and call - give Models progressive access to your live API surface, executed as the current user. Expose the same tools to any MCP-compatible Assistant from a built-in MCP Server.
API Schemas
Every API gets a portable JSON Schema contract that renders its own executable UI at /schema - and any AI approval form.
Learn moreAutoQuery Schemas
Open /auto and every AutoQuery data model already has a complete, authorized CRUD App - assembled at runtime.
Learn morePDF Studio
Design documents with a vision model and a live preview, publish them as validated artifacts, then render deterministically in production.
Learn more/chat
A complete AI Assistant inside your App, using your existing users
Why ServiceStack?
Simple, versatile, evolvable, resilient high-performance message-based APIs
- Maximize Value and Reach of System APIs
- The same APIs can be consumed from HTTP in a myriad of data formats, via popular MQ Servers and over gRPC - without sacrificing any native HTTP integrations.
- Ultimate Developer Productivity
- Native end-to-end typed integrations for 15 of the most popular languages used to build Web, Mobile & Desktop Apps, added and updated from within your favorite IDE.
- Remote Services Best Practices
- A message-based design embracing the Remote Facade, DTO and Service Gateway patterns - the only Services framework to reuse API contracts for typed integrations in .NET Apps without code-gen.
- Benefits of message-based design
- Unlike RPC, messages can be evolved, intercepted, routed & serialized, letting front and back-end developers collaborate on an agreed high-level API design free of implementation concerns.
- Consistent & Simplified Development Model
- Capturing an entire API boundary into impl-free Service Contracts means every supported language need only generate declarative DTOs - encapsulating richer metadata than other code-gen solutions.
- Preserve Investments
- ServiceStack has promoted the same remote service best-practices for over a decade, outliving several abandoned .NET Web Service frameworks and the investments that failed along with them.
Watch & Learn
Short, focused walkthroughs covering everything from your first API to deployments.
ServiceStack APIs
Effortlessly create feature-rich APIs and Web Apps
Build a Bookings API with Auto Admin UI in minutes
razor-pages
mvc
File Upload services the Easy way
autoquery
files
Managed File Uploads
files
blazor
Stream processing of data with JSON Lines
serialization
jsonl
Post Command line HTTP API tools
inspect
tool
Deploy anywhere
From your first commit to production
Templates ship with GitHub Actions workflows and a Docker Compose deployment over SSH already wired up — so there's no gap between building your App and running it.
Docker Compose over SSH
Deploy to any vanilla Linux host for a few dollars a month. No orchestrator, no lock-in.
Read the guideGitHub Actions
Mix in a ready-made workflow to build, test and release your App on every push.
Action templatesSQLite + Litestream
Run on a single node with continuous streaming replication to object storage.
Explore LitestreamKamal
Zero-downtime container deploys to any host you control, with rollbacks built in.
Deploy with Kamal
Azure
Trusted in production
Shipping in the world's largest organizations
ServiceStack has been promoting the same remote service best-practices for over a decade — outliving several .NET Web Service frameworks along the way.
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