csharp-sdk

The official C# SDK for Model Context Protocol servers and clients. Maintained in collaboration with Microsoft.

C# v1.1.0
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📄 Documentation
Supported APIs (17)

Autosuggest supplies search terms derived from a root text sent to the service. The terms Autosuggest supplies are relat

The Computer Vision API provides state-of-the-art algorithms to process images and return information. For example, it c

The Bing Custom Image Search API lets you send an image search query to Bing and get back image search results customize

The Bing Custom Search API lets you send a search query to Bing and get back search results customized to meet your cust

The Entity Search API lets you send a search query to Bing and get back search results that include entities and places.

The Image Search API lets you send a search query to Bing and get back a list of relevant images. This section provides

The Local Search client lets you send a search query to Bing and get back search results that include local businesses s

The News Search API lets you send a search query to Bing and get back a list of news that are relevant to the search que

Version history All releases ↗

Highlights of v1.1.0 include client completion details for understanding when and why a client connection ended, auto-populated completion handlers fr…

**This is the first stable release of the ModelContextProtocol C# SDK.** Thank you to all of the contributors who helped us achieve this milestone! …

This release candidate completes a full API surface area audit ahead of the 1.0.0 stable release, with more changes to public APIs to ensure consisten…

This release focuses on API surface consistency and correctness ahead of 1.0.0. Public collection properties are now typed as `IList<T>` instead of co…

The 0.9.0-preview.1 release includes multiple breaking changes focused on quality, extensibility, usability, and API consistency as we continue refini…

The 0.8.0-preview.1 release includes new server-side capabilities including message-level filters and a distributed cache-backed event stream store, a…

The 0.7.0-preview.1 release adds MCP task support, Streamable HTTP resumability with SSE event stream storage, and support for the 2025-11-25 protocol…

This release includes improvements to source generator robustness, JSON-RPC deserialization performance, and OpenTelemetry semantic convention alignme…

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