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MCP servers tagged json-schema
101 live MCP servers tagged "json-schema", ranked by trust score. Tags come from package metadata and repository topics, so this list covers servers across every category that work with json-schema.
Upjack
Declarative AI-native application framework — schema-driven entities, Markdown skills, MCPB packaging
Computeruseprotocol
Computer Use Protocol is a universal schema for AI agents to perceive and interact with any desktop UI.
Ucp
Universal Context Package - an open specification for packaging work context for LLMs
Pydantic
Data validation using Python type hints
Datamodel Code Generator
Generate Pydantic v2 models, dataclasses, TypedDict, and msgspec.Struct from OpenAPI, JSON Schema, GraphQL, Avro, Protobuf, and raw JSON/YAML/CSV.
Mda
MDA Open Spec — a Markdown superset for agent-facing documents. One .mda source compiles to drop-in SKILL.md, AGENTS.md, MCP-SERVER.md, and CLAUDE.md. JSON Schema validated, with…
Doubao Studio
Windows 多账号 AI 内容生产工作台｜项目/CSV 任务、可恢复调度、执行意图门禁、原会话定位、产物绑定下载、本机受控 Agent 接口（--local-control / CLI / MCP）
Schema
TypeScript types and JSON Schema for MCP server specifications. Define, validate, and share static snapshots of Model Context Protocol servers.
Foldkit Plus
A Schema-first agent layer for Foldkit: project an application's Model and Message union into one contract, then expose it through WebMCP, MCP, or in-app agents.
Yoetz
Yoetz — local-first structured work evidence, deterministic checks, and honest verification receipts.
Arc
Architecture diagrams as code — typed JSON schema, React renderer, visual editor, Mermaid import, ASCII/SVG/PNG export, CLI + MCP server
Schema Catalog
LLM-optimized Schema Catalog for the Kubernetes Ecosystem
Oati
Open Agent Trust Infrastructure (OATI) — an open standard for verifiable AI agent identity, delegated authority, policy enforcement, and signed action receipts.
Covenant
Contract & breaking-change detector for MCP servers — semver for your interface. Snapshot tools/resources/prompts into a lockfile, diff in CI, fail on breaking changes. Single Rus…
Target
A generated MCP server per database from supawatch: list and get tools per table, validated by the generated Zod schemas.
Oh My
Lint your MCP server before a model chokes on it. oh-my-mcp checks an MCP server's tool definitions — names that break function-calling, missing/weak descriptions, invalid input s…
Modality MCP Kit
Modality MCP Kit - Schema conversion utilities for MCP tool development with multi-library support
From Openapi
Production-ready library for converting OpenAPI specifications into MCP tool definitions
Burnish
Swagger UI for MCP servers — explore, test, and visualize any MCP server
Size
Bundle analyzer for MCP tools — measure MCP schema and context token overhead.
Tool Schema Lint
Lint MCP server tool definitions against the JSON Schema limits of Claude, OpenAI and Gemini before they fail at runtime.
Contract Check
Continuous contract testing, schema fuzzing, and breaking change detection for Model Context Protocol (MCP) servers
Dcision
The decision layer for AI — typed decisions with confidence before your agent runs. Templates, Decision Schemas and API examples (cURL, Node.js, Python).
Mockzilla Codegen
Generate Go models, HTTP servers, clients and MCP tools from OpenAPI 3.0, 3.1 and 3.2 specs.
Omnex
Universal retrieval. Structure-aware. Token-efficient.
Jiscribe
An SVG canvas that people and AI agents draw on together — diagrams, mockups, posters, whole documents. What you draw is a plain object in your code and plain JSON on disk, so the…
Open Predicate
A JSON-encoded, SQL-flavoured predicate language described by a single JSON Schema — $ref it from an OpenAPI document, or inline it into an MCP tool's inputSchema. One filter gram…
Agentcard
AgentCard — standardized identity & capability schema for AI agents. Rust reference implementation: github.com/kwailapt/aevum/tree/main/crates/agent-card
Json Query Language
A JSON-encoded, SQL-flavoured predicate language described by a single JSON Schema — $ref it from an OpenAPI document, or inline it into an MCP tool's inputSchema. One filter gram…
Promptcellar Format
Open spec for logging AI coding prompts to a JSONL file in your repo. Vendor-neutral. JSON Schema published. plf-1.
Breadboard Studio
Breadboard layout studio for people and agents: real hole grids, JSON DSL + CLI validation, rule engine, SVG/PNG export. 面向人和 Agent 的面包板设计平台。
Commandline Ktx
Define Kotlin/JVM command inputs once for CLIs, jobs, and AI tools. Get typed parsing, JSON Schema, and an optional MCP bridge.
Breakbench
Reproduce MCP failures with real stdio probes: schemas, timeouts, drift, explicit allowlists, and inspectable receipts.
SchemaRouter
Typed capability retrieval and execution layer for RAG and LLM agents across OpenAPI, MCP, OPTIMADE, and Python tools.
Osbp
Open Service Booking Protocol: an AI agent books a service appointment under a user-approved, scoped mandate, over MCP.
Contaperu
Un solo puente entre SUNAT y cualquier sistema contable peruano: estándar abierto y motor.
Tempguru Agent Skills
W-2 event staffing data for AI agents — coverage, rates, lead times, and compliance for 300+ US/CA markets. MCP server, agent skills, and open schemas.
AINavManifest
Embedded workflow instructions for AI agents. Korean Patent 10-2026-0071716. MIT + FRAND for open standardization.
Fascia
Describe a schema once, write it as anything: zod, arktype, effect and valibot into OpenAPI, JSON Schema, Arri and MCP, with every loss reported.
AI Loadout
AI Loadout — a portable Markdown format for ready-to-run AI jobs. Package prompts, rules, skills, MCP tools, knowledge, workflows, approval gates, and visual outputs into one veri…
Skillfoundry
🔥 SkillFoundry (forge) — open, vendor-neutral toolchain for authoring, validating, testing & publishing AI agent skills. Works across Claude Code / Cursor / Codex / OpenCode / Cli…
Supawatch
Your Postgres schema, compiled to everything: validators, types, API layers, AI surfaces, tests and docs. Regenerated by the database itself, verified against real rows.
Manifesto
Open-core company OS for hybrid teams. The 10 asymmetries paperclip flattens, mapped to 10 facilities. v0.1.0 — manifesto-first release.
Md Business
Business documents as Markdown — invoices, design docs and test sheets validated by JSON Schema, rendered to A4 PDF, and editable by AI agents through a built-in MCP server. Tauri…
Webmcp Extension
DevTools for the agentic web — detect, inspect, and test WebMCP tools in Chrome
Schemafit
Provider-aware structured-output / JSON-Schema CI linter: fail CI before your schema 400s on OpenAI, Anthropic, or Gemini.
MASA
MASA — A local-first, language-neutral protocol for describing, listening to, granulating, dissecting, and exchanging sound as matter, with engine-neutral processing and agentic t…
Ryntra Solana Evidence
Read-only Solana evidence kit: Token-2022 asset passports, transfer preflight against a declared owner policy, and offline receipt verification. SDK, MCP server, JSON Schemas and…
Codex Toolloop
Build agentic coding workflows with OpenAI Codex ToolLoop: Based on the Codex app-server and Vercel AI SDK v6, codex exec automation, JSONL events, structured outputs, dynamic too…
Employee Md
📋 Open standard for AI agent employment contracts — YAML spec, JSON Schema, Python CLI validator, runtime SDK