Athena MCP
An MCP server that provides a reasoning sidekick for tool-using agents with a single 'think' tool for tackling complex problems. It allows agents to consult powerful reasoning models like Claude Opus or GPT-5 only when needed, keeping costs low while maintaining control over side effects.
Install
npx -y athena-mcp
Paste the configuration above into your MCP client config (claude_desktop_config.json for Claude Desktop) and restart the client.
{
"mcpServers": {
"athena-mcp": {
"command": "npx",
"args": [
"-y",
"athena-mcp"
],
"env": {
"ATHENA_MODEL": "<ATHENA_MODEL>",
"ATHENA_EFFORT": "<ATHENA_EFFORT>",
"ATHENA_APP_URL": "<ATHENA_APP_URL>",
"ATHENA_BACKEND": "<ATHENA_BACKEND>",
"ATHENA_APP_NAME": "<ATHENA_APP_NAME>",
"ATHENA_CLAUDE_CLI": "<ATHENA_CLAUDE_CLI>",
"ATHENA_TIMEOUT_MS": "<ATHENA_TIMEOUT_MS>",
"OPENROUTER_API_KEY": "<OPENROUTER_API_KEY>"
}
}
}
}Paste the configuration above into your MCP client config (claude_desktop_config.json for Claude Desktop) and restart the client.
Sources: public MCP Server directories. This is an independent third-party directory with no affiliation to or endorsement from the maintainers of the listed servers.