This post was created with AI assistance and reviewed for accuracy before publishing.
Trending in 2026: Model Context Protocol (MCP) is the de facto way teams expose tools (files, APIs, databases) to AI clients in a consistent way. Anthropic open-sourced MCP; the ecosystem now spans editors, IDEs, and automation. Always read the current specification and SDK docs for your version rather than third-party summaries alone.
What an MCP server does
An MCP server advertises tools with JSON Schema-shaped inputs. A compatible client (for example Claude Desktop, Cursor, or custom apps using the SDK) lists tools, invokes them, and passes results back to the model. That replaces one-off plugins per vendor for many teams.
Why TypeScript and Zod
Define tool inputs with schemas you validate at runtime. Zod pairs well with TypeScript: parse once, then call your domain code. Mistyped arguments from models are common; fail with clear errors instead of throwing deep in business logic.
Security mindset
Tools run with whatever privileges you give the server process. Least privilege: read-only repos where possible, scoped API tokens, no arbitrary shell from unchecked strings. MCP does not remove the need for authz reviews.
Practical takeaway
Start from official MCP quickstarts, add Zod validation per tool, and log invocations for audits. Treat the server like any production API: rate limits, secrets rotation, and monitoring.
Further reading
Model Context Protocol documentation and the SDK repositories linked from the official site.
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