Linear MCP Server

import { Registry, Counter, Histogram, Gauge } from 'prom-client'; export const registry = new Registry(); export const metrics = { rpcRequests: new Counter({ name: 'mcp_rpc_requests_total', help: 'Total number of RPC requests', labelNames: ['method', 'status'], registers: [registry], }), rpcLatency: new Histogram({ name: 'mcp_rpc_latency_ms', help: 'RPC request latency in milliseconds', labelNames: ['method'], buckets: [10, 50, 100, 250, 500, 1000, 2500, 5000, 10000], registers: [registry], }), linearRateLimited: new Counter({ name: 'linear_rate_limited_total', help: 'Total number of rate limit hits from Linear API', registers: [registry], }), linearApiLatency: new Histogram({ name: 'linear_api_latency_ms', help: 'Linear API request latency in milliseconds', labelNames: ['operation'], buckets: [50, 100, 250, 500, 1000, 2500, 5000], registers: [registry], }), activeSSEConnections: new Gauge({ name: 'mcp_sse_connections_active', help: 'Number of active SSE connections', registers: [registry], }), webhookEvents: new Counter({ name: 'mcp_webhook_events_total', help: 'Total number of webhook events received', labelNames: ['entity_type', 'action'], registers: [registry], }), };