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# File 'lib/groww_mcp/tools/option_chain_tools.rb', line 78
def call(server_context:, trading_symbol:, underlying:, expiry:, exchange: "NSE")
client = server_context[:client]
result = client.greeks(trading_symbol: trading_symbol, underlying: underlying,
expiry: expiry, exchange: exchange)
format_response(result)
rescue GrowwMcp::ForbiddenError
MCP::Tool::Response.new([{
type: "text",
text: "❌ Greeks access denied. Requires Groww Live Data subscription (₹499 + GST/month). " \
"Subscribe at: Groww App → Settings → Trading APIs.",
}])
rescue GrowwMcp::ApiError => e
error_response(e)
end
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