MCP Gateway

TL;DR * The best MCP gateways in 2026 do six things: unify authentication across every MCP server, enforce per-user and per-tool access control, cut token cost when tool counts get large, aggregate tools into a single registry, apply guardrails to tool inputs and outputs, and trace every tool

TL;DR * The best MCP gateway for a team is decided by two questions: where the gateway is allowed to run, and how much control it enforces on each tool call. * Six deployment models cover the 2026 market: local container gateways, self-hosted open source, in-VPC or on-premise,

TL;DR * The MCP authorization specification requires OAuth 2.1, mandatory PKCE, and a strict separation between the authorization server that issues tokens and the resource server (the MCP server) that validates them. * RFC 9728 protected resource metadata and RFC 8707 resource indicators bind an access token to one specific

TL;DR * MCP guardrails validate tool arguments before a call executes and tool results after it returns, a boundary that LLM-only content filters never inspect. * Bifrost evaluates MCP guardrail rules with CEL expressions matched against mcp_client, mcp_tool, and mcp_arguments, then routes matches to one or more

TL;DR * An MCP registry is a discoverable, versioned catalog of Model Context Protocol servers, listing each server's capabilities, authentication requirements, and status so engineers can find and use approved tools without ad-hoc requests. * The official MCP Registry launched in preview on September 8, 2025 as an

TL;DR * A malicious or compromised MCP server's primary attack is secret exfiltration: it reads the tokens and API keys your agent holds and sends them to an external endpoint. The OWASP MCP Top 10 ranks token mismanagement and secret exposure as the largest risk in the Model