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?
Supports API governance, linting, and policy enforcement for OpenAPI specifications and custom governance rules defined in YAML format.
AlicenseBqualityAmaintenanceOne 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.22101,25821MITWhy this server?
Uses YAML for character definitions, data mod overlays, and JSON string patches; the MCP server exposes these YAML-driven workflows as tools.
AlicenseAqualityCmaintenanceDiablo II Resurrected modding toolkit — character builder, mod build/deploy pipeline, save inspector, CASC reader, and MCP server for Claude/Codex/AI integration. Linux/Steam Deck.2234MITWhy this server?
Enables AST-aware pattern matching, search, and safe refactoring for YAML code using ast-grep, supporting structural code manipulation across files.
AlicenseAqualityDmaintenanceEnables structural code search and refactoring across 20+ programming languages using ast-grep patterns, with safe dry-run mode and flexible filtering.11MITWhy this server?
Allows querying YAML configuration files as a knowledge source.

Agentoom Knowledgeofficial
AlicenseAqualityBmaintenanceA self-hosted, MIT-licensed MCP server that securely connects private documents and markdown files to LLMs. It provides a lightweight, local-first RAG infrastructure compatible with any MCP-enabled AI client or framework.35MITWhy this server?
Utilizes YAML files for defining server deployment configurations and infrastructure templates.

Kastellofficial
AlicenseAqualityAmaintenanceServer security auditing (413 checks, 29 categories), production hardening, and fleet management. Supports Hetzner, DigitalOcean, Vultr, and Linode.1721460Apache 2.0Why this server?
Converts YAML to JSON and JSON to YAML, enabling bidirectional data transformation.

@first-ch/tools-mcpofficial
AlicenseAqualityBmaintenanceMCP server exposing First CH Tools' free web-tool logic for WCAG contrast, JP character counting, WebP conversion, JSON-LD, and llms.txt generation to AI agents.6729MITWhy this server?
Utilizes the IANA-registered .faf (YAML) format to manage project metadata, providing tools to initialize, auto-detect, and score project context for AI-readiness.
AlicenseAqualityBmaintenanceGrok asked for MCP on a URL. This is it. First MCP server built for Grok URL-based • Zero config • Just works1225018MITWhy this server?
Uses YAML frontmatter in journal entries for metadata storage and organization
AlicenseAqualityDmaintenanceAn MCP server that integrates with Claude Desktop for managing personal journal entries, providing both a web viewer for browsing journals and tools for adding, searching, and analyzing journal content.6182MITWhy this server?
Provides task management capabilities using YAML files as the data storage format, allowing creation and management of hierarchical task structures with attributes like status, dependencies, and milestones.
AlicenseBqualityBmaintenanceEnables AI assistants to manage tasks through YAML-based storage with subtask suggestions, status updates, and Mermaid Gantt chart generation. Supports hierarchical task structures with attributes like dependencies, milestones, and parallel execution.26211ISC