{"id":"hermes-mcp","name":"Hermes MCP","homepage":"https://github.com/cloudwalk/hermes-mcp","repo_url":"https://github.com/cloudwalk/hermes-mcp","category":"sdk","subcategories":["mcp-sdk","elixir","server-client"],"tags":["elixir","mcp-sdk","erlang-otp","phoenix","high-concurrency","fault-tolerant","mcp-server","mcp-client","open-source"],"what_it_does":"A comprehensive Elixir/OTP implementation of the Model Context Protocol providing both client and server functionality, leveraging Elixir's concurrency model and fault tolerance for building robust MCP integrations in Phoenix and standalone applications.","use_cases":["Building MCP servers in Elixir/Phoenix applications that expose custom tools to AI assistants","Creating MCP clients in Elixir to connect to and interact with existing MCP servers","Running high-concurrency, fault-tolerant MCP infrastructure where OTP supervision trees provide resilience"],"not_for":["Teams not using Elixir/Erlang — this SDK is Elixir-specific","Rapid prototyping where Python or TypeScript MCP SDKs have more examples and community resources","Simple single-tool integrations where the full OTP supervision model adds unnecessary complexity"],"best_when":"You are building MCP infrastructure in an Elixir/Phoenix application and need production-grade concurrency, fault tolerance, and hot code reloading.","avoid_when":"Your team does not have Elixir expertise — the learning curve plus MCP complexity is significant for non-Elixir shops.","alternatives":["mcp-python-sdk","mcp-typescript-sdk","fastmcp"],"af_score":75.0,"security_score":72.0,"reliability_score":null,"package_type":"mcp_server","discovery_source":["github"],"priority":"low","status":"evaluated","version_evaluated":"v0.14.1","last_evaluated":"2026-03-01T09:50:05.685482+00:00","performance":{"latency_p50_ms":null,"latency_p99_ms":null,"uptime_sla_percent":null,"rate_limits":null,"data_source":"llm_estimated","measured_on":null}}