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.22131,920 npm24MITWhy this server?
Utilizes YAML files for defining server deployment configurations and infrastructure templates.

Kastellofficial
AlicenseAqualityBmaintenanceServer security auditing (413 checks, 29 categories), production hardening, and fleet management. Supports Hetzner, DigitalOcean, Vultr, and Linode.17150 npm60Apache 2.0Why this server?
Edits YAML files by selector, preserving comments and formatting while supporting value updates and array operations.
Why this server?
Validates YAML fixtures against their expected DTOs, reporting missing, stale, or incorrectly typed fields.

Nemesis-MCPofficial
AlicenseAqualityAmaintenanceChecks mocks, stubs, and spies against current production code to detect stale or mismatched test doubles without running any tests.3MITWhy 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?
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.6722 npmMITWhy 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.69 npmMITWhy this server?
Supports loading and processing OpenAPI specifications in YAML format.
AlicenseBqualityDmaintenanceA Model Context Protocol server that loads multiple OpenAPI specifications and exposes them to LLM-powered IDE integrations, enabling AI to understand and work with your APIs directly in development tools like Cursor.737 npm90MITWhy 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.610 npm2MIT