--- title: How to Organize Minimal APIs | daily.dev description: A walkthrough of approaches for organizing ASP.NET Core Minimal APIs as applications grow, since Minimal APIs lack built-in structure compared to controllers.... canonical: https://daily.dev/posts/how-to-organize-minimal-apis-5mm3njcco twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: How to Organize Minimal APIs | daily.dev og:description: A walkthrough of approaches for organizing ASP.NET Core Minimal APIs as applications grow, since Minimal APIs lack built-in structure compared to controllers.... og:url: https://daily.dev/posts/how-to-organize-minimal-apis-5mm3njcco og:image: https://api.daily.dev/og/posts/5mm3nJcCO.png og:image:alt: How to Organize Minimal APIs og:image:width: 1200 og:image:height: 630 og:locale: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # How to Organize Minimal APIs **[NikolaTech](https://daily.dev/sources/nikolatech)** · 7 min read · 0 upvotes · 0 comments ## Summary A walkthrough of approaches for organizing ASP.NET Core Minimal APIs as applications grow, since Minimal APIs lack built-in structure compared to controllers. Covers extension methods with MapGroup, the open-source Carter library, a manual DI-based module registration approach, and the REPR (Request Endpoint Response) pattern with the FastEndpoints library, including code examples for each. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Questions this post answers ### How can I organize ASP.NET Core Minimal API endpoints so Program.cs doesn't become a mess? Move endpoint definitions out of Program.cs using extension methods that group related routes, optionally combined with MapGroup for a common prefix. For automatic discovery without a third-party library, define an IModule interface with a Map method, then register all implementations found in the assembly via dependency injection and call Map on each at startup. _Developers structuring growing ASP.NET Core APIs can compare these organization patterns on daily.dev._ ### What is the Carter library used for in ASP.NET Core Minimal APIs? Carter is an open-source library that simplifies defining and registering Minimal API routes by letting you implement an ICarterModule interface per module, then automatically discovering and registering all routes with AddCarter and MapCarter, keeping Program.cs clean without manual extension method calls for each new endpoint group. _Teams picking a routing library for minimal APIs can weigh options like Carter via daily.dev._ ### What is the REPR pattern and how does FastEndpoints relate to it? REPR (Request Endpoint Response) organizes APIs around individual endpoint classes rather than centralized controllers, so each class maps to one route for easier navigation and single responsibility. FastEndpoints is an open-source library implementing REPR with performance comparable to Minimal APIs, minimal boilerplate, and rich built-in features plus documentation. _Developers evaluating endpoint-per-class designs can explore REPR pattern libraries like FastEndpoints on daily.dev._ ## Similar posts on daily.dev - [How to Organize Minimal APIs](https://daily.dev/posts/how-to-organize-minimal-apis-o8gyfuyf1) · Telerik · 10 upvotes · 0 comments - [Minimal APIs After the Hype: What Remains When Boilerplate Is Gone?](https://daily.dev/posts/minimal-apis-after-the-hype-what-remains-when-boilerplate-is-gone--drodew0ft) · We Are .NET · 24 upvotes · 1 comments - [Rails to ASP.NET Core: A Developer's Map](https://daily.dev/posts/rails-to-asp-net-core-a-developer-s-map-bwpvb7n8j) · Khalid Abuhakmeh · 0 upvotes · 0 comments - [ASP.NET Core Controllers: A Practical Guide to Building REST Endpoints](https://daily.dev/posts/asp-net-core-controllers-a-practical-guide-to-building-rest-endpoints-qbrdx5rqi) · We Are .NET · 0 upvotes · 0 comments - [How to Migrate from ASP.NET Framework to ASP.NET Core](https://daily.dev/posts/how-to-migrate-from-asp-net-framework-to-asp-net-core-e22ntd3va) · freeCodeCamp · 4 upvotes · 0 comments --- Tags: [#c#](https://daily.dev/tags/c#), [#aspnet](https://daily.dev/tags/aspnet) [View this post on daily.dev](https://daily.dev/posts/how-to-organize-minimal-apis-5mm3njcco) ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@type":"TechArticle","headline":"How to Organize Minimal APIs","url":"https://daily.dev/posts/how-to-organize-minimal-apis-5mm3njcco","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/how-to-organize-minimal-apis-5mm3njcco"},"datePublished":"2026-10-04T13:06:58.350Z","dateModified":"2026-10-04T13:10:52.492Z","description":"A walkthrough of approaches for organizing ASP.NET Core Minimal APIs as applications grow, since Minimal APIs lack built-in structure compared to controllers....","image":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/989abcaeb9b8c16110e23a420742c144?_a=AQAEuop","thumbnailUrl":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/989abcaeb9b8c16110e23a420742c144?_a=AQAEuop","isAccessibleForFree":true,"articleSection":"NikolaTech","inLanguage":"en","publisher":{"@type":"Organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180}},"author":{"@type":"Organization","name":"NikolaTech","logo":"https://media.daily.dev/image/upload/s--1h2fO6FL--/f_auto,q_auto/v1791119050/logos/nikolatech?_a=BAMAMicg0","url":"https://daily.dev/sources/nikolatech"},"commentCount":0,"discussionUrl":"https://daily.dev/posts/how-to-organize-minimal-apis-5mm3njcco","interactionStatistic":[{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":0},{"@type":"InteractionCounter","interactionType":{"@type":"CommentAction"},"userInteractionCount":0}],"keywords":"c#,aspnet","timeRequired":"PT7M"} {"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https://daily.dev"},{"@type":"ListItem","position":2,"name":"NikolaTech","item":"https://daily.dev/sources/nikolatech"},{"@type":"ListItem","position":3,"name":"How to Organize Minimal APIs"}]} {"@context":"https://schema.org","@type":"FAQPage","@id":"https://daily.dev/posts/how-to-organize-minimal-apis-5mm3njcco#faq","mainEntity":[{"@type":"Question","name":"How can I organize ASP.NET Core Minimal API endpoints so Program.cs doesn't become a mess?","acceptedAnswer":{"@type":"Answer","text":"Move endpoint definitions out of Program.cs using extension methods that group related routes, optionally combined with MapGroup for a common prefix. 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