Observed Signal · Apr 10, 2026 · Technical Release · Source: DEV Community · Impact: 2/5 · Sentiment: Neutral
Production-ready MCP Server Template with Postgres, OTEL, Kubernetes
The post describes fastmcp-production-template, an open-source template for building production-ready MCP (Model Context Protocol) servers using FastMCP. It addresses four production concerns: async PostgreSQL connection pooling (via asyncpg and a DatabasePool singleton initialized in FastMCP lifespan), security against prompt-injection (YAML allowlist plus a @require_allowlist decorator and column allowlists), observability (OpenTelemetry initialization with a tracer and four custom metrics plus OTLP export), and Kubernetes deployment (Helm chart with HPA, External Secrets Operator for Vault-backed secrets, non-root containers, and /health probes). The repo includes startup validators for DATABASE_URL and API key, quickstart Docker/Helm instructions, and is intended as an opinionated infrastructure template rather than application-specific code.
Provides a reusable, production-grade template for MCP/LLM tool servers (DB pooling, security, observability, k8s deployment) that can accelerate safe LLM integrations, but is a technical developer resource rather than an industry-shifting announcement.
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Key Takeaways & Evidence Grounding
- Author published fastmcp-production-template as a forkable template for production MCP servers.
- Template uses asyncpg with a bounded DatabasePool singleton initialized via FastMCP's lifespan hook to manage async PostgreSQL connections.
- Security controls include a YAML allowlist (allowed_tools) and a @require_allowlist decorator to prevent unauthorized tool invocation; filter column names are validated against an allowlist to prevent SQL injection.
- Observability is provided by OpenTelemetry with a tracer and four custom metrics (mcp.tool.calls, mcp.tool.errors, mcp.tool.duration, mcp.db.pool_size) and supports OTLP export to backends like Grafana Tempo, Jaeger, or AWS X-Ray.
- Kubernetes deployment artifacts include a Helm chart with Horizontal Pod Autoscaler (minReplicas: 2, maxReplicas: 8, targetCPU: 70%), External Secrets Operator integration (pulling DATABASE_URL and API_KEY from Vault), non-root container user (mcpuser UID 1000), and a /health endpoint used for liveness/readiness probes.
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Open-source MCP server template for Claude and Cursor
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