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.
AlicenseAqualityAmaintenanceOne 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.22131,981 npm23MITWhy 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?
Edits YAML files by selector, preserving comments and formatting while supporting value updates and array operations.
Why 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.6303 npmMITWhy 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.17180 npm59Apache 2.0Why 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?
Supports parsing and ingesting tool definitions from YAML-based OpenAPI specifications to build the internal tool graph.
AlicenseAqualityAmaintenanceGraph-based tool retrieval for LLM agents. Builds a tool graph from OpenAPI/MCP specs and retrieves multi-step workflows via hybrid search (BM25 + graph traversal + embedding), recovering accuracy from 12% to 82% with 79% fewer tokens. Also works as an MCP Proxy to aggregate multiple servers behind 3 meta-tools.691 PyPI16MITWhy this server?
Provides support for reading and writing YAML files within permitted directories
AlicenseAqualityDmaintenanceA TypeScript-based MCP server that enables Claude Desktop to perform file operations and retrieve system information, with built-in security features that restrict access to safe directories only.613 npmMITWhy this server?
Supports reading database configuration from YAML files in projects
AlicenseAqualityBmaintenanceEnables secure read-only querying of multiple database types (MySQL, PostgreSQL, MSSQL, Oracle) through natural language. Automatically reads database configuration from project files and blocks any data modification operations for safety.45 npm1ISC