Add ECA to MCP client documentation (modelcontextprotocol#1543)

* Add ECA to MCP client documentation

* Update eca docs

Updated the ECA section to remove duplicate features and corrected the link to the ECA website.

* Fix lint

* Fix lint

* Remove emojis

Co-authored-by: Jonathan Hefner <[email protected]>

* Update github link

Co-authored-by: Jonathan Hefner <[email protected]>

---------

Co-authored-by: Jonathan Hefner <[email protected]>

Author: ericdallo

docs/clients.mdx

@@ -38,6 +38,7 @@ This page provides an overview of applications that support the Model Context Pr
 | [Copilot-MCP][CopilotMCP]                        | ✅          | ❌        | ✅      | ❓                     | ❌         | ❌    | ❓            |
 | [Cursor][Cursor]                                 | ✅          | ✅        | ✅      | ❌                     | ✅         | ✅    | ✅            |
 | [Daydreams Agents][Daydreams]                    | ✅          | ✅        | ✅      | ❌                     | ❌         | ❌    | ❓            |
+| [ECA][ECA]                                       | ✅          | ✅        | ✅      | ❌                     | ❌         | ✅    | ❓            |
 | [Emacs Mcp][Mcp.el]                              | ❌          | ❌        | ✅      | ❌                     | ❌         | ❌    | ❓            |
 | [fast-agent][fast-agent]                         | ✅          | ✅        | ✅      | ✅                     | ✅         | ✅    | ✅            |
 | [FlowDown][FlowDown]                             | ❌          | ❌        | ✅      | ❓                     | ❌         | ❌    | ❌            |
@@ -133,6 +134,7 @@ This page provides an overview of applications that support the Model Context Pr
 [CopilotMCP]: https://github.com/VikashLoomba/copilot-mcp
 [Cursor]: https://cursor.com
 [Daydreams]: https://github.com/daydreamsai/daydreams
+[ECA]: https://eca.dev
 [Klavis AI]: https://www.klavis.ai/
 [Mcp.el]: https://github.com/lizqwerscott/mcp.el
 [fast-agent]: https://github.com/evalstate/fast-agent
@@ -489,6 +491,25 @@ The Claude desktop application provides comprehensive support for MCP, enabling
 - Supports MCP Servers in config
 - Exposes MCP Client
 
+### ECA - Editor Code Assistant
+
+[ECA](https://eca.dev) is a Free and open-source editor-agnostic tool that aims to easily link LLMs and Editors, giving the best UX possible for AI pair programming using a well-defined protocol
+
+**Key features:**
+
+- **Editor-agnostic**: protocol for any editor to integrate.
+- **Single configuration**: Configure eca making it work the same in any editor via global or local configs.
+- **Chat** interface: ask questions, review code, work together to code.
+- **Agentic**: let LLM work as an agent with its native tools and MCPs you can configure.
+- **Context**: support: giving more details about your code to the LLM, including MCP resources and prompts.
+- **Multi models**: Login to OpenAI, Anthropic, Copilot, Ollama local models and many more.
+- **OpenTelemetry**: Export metrics of tools, prompts, server usage.
+
+**Learn more:**
+
+- [ECA website](https://eca.dev)
+- [ECA source code](https://github.com/editor-code-assistant/eca)
+
 ### Emacs Mcp
 
 [Emacs Mcp](https://github.com/lizqwerscott/mcp.el) is an Emacs client designed to interface with MCP servers, enabling seamless connections and interactions. It provides MCP tool invocation support for AI plugins like [gptel](https://github.com/karthink/gptel) and [llm](https://github.com/ahyatt/llm), adhering to Emacs' standard tool invocation format. This integration enhances the functionality of AI tools within the Emacs ecosystem.