MCP servers that ship as code — a repository or a package you install and run locally (usually over stdio). They have no hosted endpoint, so we cannot probe or grade them: instead each one shows its repository, install command, license, stars and when it was last updated.
Collected from GitHub repositories and npm, PyPI, Cargo, Go, Maven, NuGet and RubyGems packages tagged as MCP servers, the official MCP Registry, Docker's MCP catalog, ModelScope, Baidu MCP World, Cline and other public directories; one entry per repository. A server that also offers a hosted endpoint is listed under Remote instead. These entries are not counted in our reachability, verification or readiness statistics.
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schema-validator-ai-mcpgithub.com/csoai-org/schema-validator-ai-mcpupdated this year
Schema Validator Ai automation via MCP. Includes validate json schema, generate schema, convert openapi. By MEOK AI Labs.
pypi MIT License -
schema-gengithub.com/sharozdawa/schema-genupdated this year
AI-powered Schema.org JSON-LD markup generator. 12 schema types with live preview. Web app + MCP server.
MIT ★ 1 -
Local MySQL schema store for coding agents: cached, fingerprint-checked, served over MCP or a CLI.
npm MIT -
mcp-schema-toolsgithub.com/rog0x/mcp-schema-toolsupdated this year
MCP server for schemas: generate JSON Schema from data, generate TypeScript types, validate data, create mock data from schema, compare schemas Install: npx @rog0x/mcp-schema-tools
NOASSERTION -
MCP OpenAPI schema explorer
npm MIT -
A comprehensive Message Control Protocol (MCP) server for Kafka Schema Registry.
pypi MIT ★ 32 -
MCP server for interacting with PostgreSQL databases, with support for multiple schemas
npm MIT -
@mseep/mcp-pg-schemastale
MCP server for getting schema information from a PostgreSQL database
npm MIT -
schema-gen-mcpgithub.com/sharozdawa/schema-genupdated this year
MCP server for generating Schema.org JSON-LD markup for Person, Organization, Product, FAQ, and more
npm MIT -
MCP server providing OpenStreetMap tagging schema tools for AI assistants - validate tags, query values, search presets, and suggest improvements
GPL-3.0 ★ 9 -
Vinkius Edge high-performance Model Context Protocol (MCP) server for robust JSON Schema validation.
★ 3 -
An open-source, local-first (MCP) server for Automated Schema org JSON-LD Generation, GA4 Metric Validation, llm.txt Auditing
MIT -
A sovereign, local-first MCP server for automated Schema.org JSON-LD generation, GA4 metric validation, llm.txt auditing, and content stickiness analytics.
pypi MIT -
A Model Context Protocol server that provides read-only access to PostgreSQL databases with enhanced multi-schema support.
MIT ★ 3 -
Universal schema compiler (SQL/Prisma to Zod, TypeScript, Pydantic) and realistic synthetic mock API data generator for MCP.
MIT -
Technical SEO, Broken Link, Schema.org & Security Auditor ($0.80/1k) — Includes 1-Click n8n Workflow, Make.com Blueprint & Claude MCP Server (https://apify.com/lucacelli/seo-technical-audit-broken-link-schema-analyzer)
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Read-only sensor that detects MCP tool-poisoning / rug-pull attacks: alerts when a trusted tool's schema or description changes silently.
AGPL-3.0 ★ 1 -
MCP server providing token-efficient access to OpenAPI/Swagger specs via MCP Resource Templates for client-side exploration.
MIT ★ 76 -
Stop AI agents from writing SQL against tables and columns that do not exist. Schema snapshot + Claude Code hook + MCP server + CI check. 0 false blocks on 1,034 Spider queries.
MIT ★ 1 -
Free database schema discovery and comprehension tool
NOASSERTION ★ 14 -
A native editor for database schemas, with AI assistance. Built with Tauri. macOS, Windows, Linux.
NOASSERTION -
queue-pilotgithub.com/larscowe/queue-pilotupdated this year
MCP server for message queue development — combines RabbitMQ and Kafka message inspection with JSON Schema validation
npm MIT -
json-contractsgithub.com/json-contracts/json-contractsupdated this year
Local MCP server for natural-language-to-JSON workflows using Git-controlled JSON contracts and JSON Schema validation.
NOASSERTION ★ 1 -
Local JSON schema diff CLI + MCP client for API/MCP drift — offline compare_json, hosted monitoring connector for Pro/Team.
MIT ★ 2 -
json-mender-mcpactive
Deterministic JSON repair, regex testing, and real JSON-Schema validation for AI agents. Local, offline, no telemetry.
npm MIT -
@prompt-to-json/mcpgithub.com/prompt-to-json/prompt-to-jsonupdated this year
MCP server for prompt-to-JSON contracts, JSON Schema validation, and structured LLM/agent outputs.
npm Apache-2.0 -
json-contractsgithub.com/json-contracts/json-contractsupdated this year
MCP server for natural-language-to-JSON workflows using Git-controlled JSON contracts and JSON Schema validation.
npm Apache-2.0 -
mysql-mcp — MCP server connecting Claude Code to MySQL. Supports SSH tunnels, SSL/TLS, and multiple databases. 20 tools for schema introspection, query execution, ERD generation, stored procedures, triggers, and events. Includes CLI for connection management.
MIT ★ 1 -
MCP server that gives AI agents accurate SQL schema and data access (MySQL, PostgreSQL, SQL Server, SQLite) — no more schema guessing
npm MIT -
AISchemaGate validates and repairs structured LLM output against a contract, plus DataContractGate data contracts. Repair uses the violation fields from that check (min, max, pattern, enum, compliance_mode). The contract checks values a JSON Schema or Pyd
npm MIT -
MCP server that lets AI agents load an OpenAPI spec, call real endpoints, validate responses against the documented schema, run a full contract-test pass, diff two spec versions for breaking changes, and health-check a set of endpoints.
npm MIT -
jsonbin-mcp-servergithub.com/ffhope/jsonbin-mcp-serverupdated this year
MCP server for JSONBin.io: Bins CRUD, Collections, Schema Docs Validation
npm MIT -
MCP server exposing accurate Strapi project facts (UIDs, schemas, references) to AI coding agents — reads your real schema.json, so an agent looks values up instead of grepping for them.
npm MIT AND LicenseRef-PolyForm-Shield-1.0.0 -
MCP server providing JSON schema generation and filtering tools using quicktype
npm MIT -
amdfgithub.com/segoja7/agnostic-multicloud-delivery-frameworkupdated this year
Transform Kubernetes CRDs into type-safe KCL schemas and developer-friendly blueprints
pypi Apache License Version 2.0, January 2004 -
An MCP server that aids in developing for Cisco Nexus Dashboard 4.2 OpenAPI schema.
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12 deterministic database intelligence, AST SQL & schema reliability tools: natural language to SQL synthesizer, AST SQL injection & tautology auditor, query plan EXPLAIN optimizer, breaking schema migration differ, polyglot SQL transpiler (PostgreSQL/MyS
npm MIT -
JSON-LD / Schema.org structured-data validator API + MCP server. Never fetches URLs.
MIT -
skimgithub.com/tonyzdev/skimupdated this year
Skim: A MCP server for Claude Code — skim large outputs, return only schema. Save context, save tokens.
★ 6 -
[ALPHA] Pure-Rust relational DB + schema engine, 10 domain blueprints. Implements the Storytold craft-app harness - see storytold/artcraft.
Apache-2.0 -
Deterministic AST contract guard & interactive AI schema triage engine for modern React & Drizzle stacks.
npm MIT -
Serve the Schema.org markup of any URL as an MCP server over stdio or HTTP.
npm MIT -
@mukundakatta/validate-mcpgithub.com/mukundakatta/validate-mcpupdated this year
MCP server: validate JSON against a JSON Schema (draft-07) with detailed error paths.
npm MIT -
dbt-doctorgithub.com/astoriel/dbt-doctorupdated this year
AI-driven quality & governance MCP Server for dbt projects. Audit coverage, profile data, detect schema drift, and auto-generate documentation.
pypi MIT -
Repair broken JSON from LLM output and validate it against a JSON Schema. API + MCP server.
MIT -
mcp-pg-servergithub.com/ofershap/mcp-server-postgresupdated this year
MCP server for PostgreSQL — query databases, inspect schemas, explain queries from your IDE
npm MIT -
mysql_fk_path_findergithub.com/hussainbiedouh/mysql_fk_path_finderupdated this year
Traces foreign-key paths across a MySQL schema to show how records in one table connect to others.
MIT -
MCP server and agent skill giving AI agents offline, structured access to the ECMA-376 (Office Open XML) schema
npm MIT -
mcp-sqlite-servergithub.com/ofershap/mcp-server-sqliteupdated this year
MCP server for SQLite — query databases, inspect schemas, explain queries, and export data from your IDE
npm MIT -
diogenes-database-intelligence-mcpgithub.com/stand-out-of-my-sun/diogenes-database-intelligence-mcpactive
12 deterministic database intelligence, AST SQL & schema reliability tools: natural language to SQL synthesizer, AST SQL injection & tautology auditor, query plan EXPLAIN optimizer, breaking schema migration differ, polyglot SQL transpiler (PostgreSQL/MySQL/SQLite), composite B-tree index advisor, relational 3NF/BCNF normalization validat
MIT -
db-semantic-mcpgithub.com/chncaesar/db-semantic-mcpupdated this year
MCP server exposing PostgreSQL and SQL Server schema metadata to AI coding agents — list tables, describe columns, sample data, semantic search
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Validates config files against their official schemas: tsconfig, compose, workflows, 1,400+ more.
MIT ★ 1 -
MCP server that exposes GraphQL APIs to AI tools through automatic schema introspection and tool generation
npm Apache-2.0 -
mcp-db-analyzergithub.com/dmitriusan/mcp-db-analyzerupdated this year
MCP server for PostgreSQL, MySQL, and SQLite schema analysis, index optimization, and query plan inspection
npm MIT -
forevertools-mcpgithub.com/forevertools/forevertools-mcpupdated this year
MCP server wrapping ForeverTools APIs: schema markup, SSL inspection, WHOIS, email validation, screenshots, IP lookup, FX rates, and UK business days
pypi MIT -
forevertools-mcpgithub.com/ForeverTools/forevertools-mcpupdated this year
MCP server for Claude: schema markup, SSL, WHOIS, email validation, screenshots, IP lookup, FX rates, UK business days
MIT -
MCP server and agent skill giving AI agents offline, structured access to the ECMA-376 (Office Open XML) schema
MIT -
Deterministic JSON repair and JSON Schema validation for AI agents and software. No LLM required.
NOASSERTION -
truss-seo-mcpgithub.com/claw-factory/truss-seo-mcpupdated this year
SEO Command Center for AI agents — keyword research, site audits, content optimization, schema markup
npm MIT -
基于大语言模型的自然语言数据库查询与分析工作台（NL2SQL + 图谱 Schema Linking + AST 安全护栏 + 业务语义层 + MCP 服务中心 + RBAC 权限管理），内置 FastAPI + React 工作台，支持 DeepSeek / GLM / OpenAI / Qwen / Gemini / Ollama
MIT ★ 11