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## Motivation and Context The Installation page names faraday as the example of an optional dependency but leaves out event_stream_parser, which the HTTP client transport needs as soon as a server answers with SSE. The Transports page documents both gems, so a reader who starts from Installation learns about the second one only when a streaming response fails to parse. The Transports page also marks event_stream_parser as "optional, required only for SSE responses", which reads as a corner case. Whether a response is JSON or SSE is the server's choice, made for each response, a client must accept both, and this SDK's own server picks SSE by default and always on the modern lifecycle, so a client written for arbitrary servers needs both gems. Both pages now say so, and the Transports page spells out the one setup that can leave the gem out: a server known to answer with JSON alone, such as this SDK's server in JSON response mode serving handshake-lifecycle clients, and no listening stream. The Installation page shows the faraday-only Gemfile first and then the one that adds event_stream_parser, so both cases are visible at a glance. ## How Has This Been Tested? Documentation only; the Gemfile snippets on both pages match. ## Breaking Changes None.
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Installation
Install the gem and any optional dependencies for the features you use.
Requirements
Ruby 2.7.0 or later.
Installing the Gem
Add this line to your application's Gemfile:
gem "mcp"
And then execute:
$ bundle install
Or install it yourself as:
$ gem install mcp
You may need to add additional dependencies depending on which features you wish to access. For example, the HTTP client transport requires the faraday gem:
gem "faraday", ">= 2.0"
Reading SSE (text/event-stream) responses needs event_stream_parser as well.
Whether a response is JSON or SSE is the server's choice, made for each response, and this SDK's own server picks SSE by default,
so a client written for arbitrary servers needs both gems:
gem "faraday", ">= 2.0"
gem "event_stream_parser", ">= 1.0"
The Transports page describes the one setup where faraday alone is enough.