Best YAML MCP Servers
YAML (YAML Ain't Markup Language) is a human-readable data serialization standard that can be used in conjunction with all programming languages and is often used for configuration files.
Why this server?
Uses YAML for defining 'freshness-as-code' policies, allowing users to configure domain-specific thresholds for staleness, latency, and TLS health.
AsecurityAlicenseAqualityData freshness verification for AI agents. Probes endpoints for HTTP cache staleness, latency percentiles, content fingerprinting, TLS certificate health, DNS timing, and redirect chains. Returns deterministic FRESH/STALE/UNKNOWN JSON verdicts with policy evaluation and NIST AI RMF mapping.Last updated 9 days ago23MITWhy this server?
Supports API governance, linting, and policy enforcement for OpenAPI specifications and custom governance rules defined in YAML format.

delimitofficial
AsecurityAlicense-qualityOne workspace for every AI coding assistant. Governance tools for API lint, diff, persistent ledger, multi-model deliberation, security audit, and test verification. Works with Claude Code, Codex, Cursor, and Gemini CLI.Last updated 17 hours ago817,43611MITWhy this server?
Uses YAML for mock configuration, environment setup, and importing/exporting API definitions.
Why this server?
Uses YAML for defining complex pipeline workflows, topological dependency resolution, and node configurations.
AsecurityAlicense-qualityGenerates crash-proof Python LLM pipelines from plain English descriptions. Pipelines resume from the last successful node after a crash instead of restarting from scratch. IProvider-agnostic , works with Groq, Gemini, Ollama, OpenAI, or any Python callable. Zero infrastructure, runs entirely on free-tier APIs.Last updated 20 days ago313MITWhy this server?
Utilizes YAML files for defining server deployment configurations and infrastructure templates.

Kastellofficial
AsecurityAlicense-qualityServer security auditing (413 checks, 29 categories), production hardening, and fleet management. Supports Hetzner, DigitalOcean, Vultr, and Linode.Last updated 3 days ago1348037Apache 2.0Why this server?
Enables parsing and extraction of YAML frontmatter metadata embedded in the beginning of Markdown files.
AsecurityAlicense-qualityMCP server for markdown files — search, extract sections, list headings, find code blocks across docs.Last updated a month ago634MITWhy this server?
Enables working with document frontmatter (YAML metadata) for documentation files
AsecurityAlicense-qualityA Model Context Protocol implementation that enables AI assistants to interact with markdown documentation files, providing capabilities for document management, metadata handling, search, and documentation health analysis.Last updated 2 months ago147654MITWhy this server?
Supports YAML as an output format for viewing OpenAPI specifications
AsecurityAlicense-qualityMCP server providing token-efficient access to OpenAPI/Swagger specs via MCP Resources for client-side exploration.Last updated 12 days ago3669MITWhy this server?
Offers YAML formatting functionality for structured data
AsecurityAlicense-qualityA comprehensive Model Context Protocol server providing access to 70+ IT tools for developers and system administrators, including encoding/decoding, text manipulation, hashing, and network utilities.Last updated 13 days ago10018319TypeScriptMIT