JSON Validator API
JSON syntax validation, JSON Schema checking, structure stats. x402 micropayment.
MCP server · by Br0ski777
About
JSON Validator API is an MCP server published by Br0ski777. Marketplaces we read that list it: 1 (Official MCP Registry). We first saw it on 2026-10-11 and have recorded no change since. As of our marketplace pass on 2026-10-12.
What it asks for
- Runs remotely
None of the marketplaces we read publishes its tools or the settings it asks for.
What it declares, asks for and runs, in full
Only install plugins from developers you trust. We list what marketplaces publish and do not test plugins.
Works with
- Claude Code
- Cursor
- VS Code
- Copilot CLI
A one-click link opens the client, which asks you to confirm before it adds the server.
From the marketplaces that list it and the MCP transport it declares, as each client documents them. We do not test plugins.
Connect
Commands and configs built only from what its marketplaces declare. We do not run them for you and do not test plugins.
As a remote MCP server
Built from what Official MCP Registry declares.
claude mcp add --transport sse json-validator https://json-validator.api.klymax402.com/mcp{
"mcpServers": {
"json-validator": {
"url": "https://json-validator.api.klymax402.com/mcp"
}
}
}The endpoint speaks SSE. Codex connects to STDIO and streamable HTTP servers only, so it has no config here.
Where it is published
| Marketplace | Status | Version | Figures | Verified | First seen |
|---|---|---|---|---|---|
| Official MCP Registry (Open the registry record) | Listed | 1.1.0 | Forks (GitHub): 0 Stars (GitHub): 0 |
Not marked |
Each figure is the marketplace's own and is never added up across marketplaces. A marketplace that publishes no figure shows none: no number is not zero.
What changed
Nothing has moved on this plugin since we started watching it.
Similar plugins
Products whose own names, descriptions, tools and skills are closest in meaning to this one, on every marketplace we read. Closeness is ranked within this list only.
-
Validate JSON against a schema with Ajv, infer a schema from samples and diff two schemas.
-
Validate JSON, YAML, XML and CSV with exact line/column errors and silent-corruption warnings.
-
Check whether text is valid JSON. The body is discarded.
-
Deterministic inspect, safe repair, and JSON Schema validation for agent JSON. No LLM.
-
Regex matching, email/URL format validation, and JSON Schema validation.
-
Deterministic JSON Schema validation with exact violations and conservative type normalization.
-
validator-ai-mcp io.github.CSOAI-ORG/validator-ai-mcp
AI-powered validator ai MCP server for agents. Supports validate json, validate email, validate
-
json io.github.rog0x/json
JSON/YAML/CSV validate, diff, transform for AI agents
-
json io.github.ryudi84/json
MCP server for JSON processing — format, validate, diff, convert, minify, query, analyze
-
json-tools-mcp io.github.mrfentmen/json-tools-mcp
Validate, format, and inspect JSON locally. No network and no key.
Similar plugins by marketplace
The same question asked of one marketplace at a time: is there an analog of this plugin there?
Has a listing on Claude Code: claude-plugins-community (5)
-
Accuracy-first FHIR R4/R4B/R5 skill for JSON formatting and reasoning. It labels claims as normative/version-delta/profile-dependent/practice, requires source-backed normative…
-
Automate API security directly in Claude Code with 42Crunch - automatically audit OpenAPI specs, detect vulnerabilities aligned with OWASP API Security risks (including…
-
Records is a local-first FHIR validation and data-quality workflow plugin for Claude Code. It helps FHIR developers, IG authors, and AI agents validate FHIR JSON, explain…
-
: Build production-ready API endpoints with proper contracting for any tech stack, or analyze existing API responses to generate typed contracts. Supports Express, NestJS…
-
Audit your Claude plugins, skills, and coding agents against the SOSA methodology — Supervised Orchestrated Secured Agents. Scans your entire plugin ecosystem and evaluates each…
Has a listing on Claude Code: claude-plugins-official (5)
-
Automate API security directly in Claude Code with 42Crunch - automatically audit OpenAPI specs, detect vulnerabilities aligned with OWASP API Security risks (including…
-
SAPUI5 / OpenUI5 plugin for coding agents. Create and validate UI5 projects, access API documentation, run UI5 linter, get development guidelines and best practices for UI5…
-
Deep vulnerability scanning of your own code, run entirely inside your Claude Code session at a chosen effort tier, with every finding challenged before it is reported and the…
-
Skills for adding DeepEval evaluations, tracing, datasets, Confident AI reports, and iterative improvement loops to AI applications.
-
Work with Postman from your agent: bootstrap a repo's Postman setup, mock an API before it's implemented, run collection and governance checks in CI, monitor a live endpoint…
Has a listing on Claude: knowledge-work-plugins (5)
-
Create, edit, and deploy ServiceNow applications with the Fluent SDK effortlessly through Claude AI.
-
MCP server for terminal commands, file operations, and process management
-
Security review for Claude-generated code. Pattern-based warnings on edits, LLM-powered diff review on Stop, and an agentic commit reviewer that catches injection, XSS, SSRF…
-
Skills for working with Langfuse, the open-source LLM engineering platform for tracing, prompt management, and evaluation.
-
The Vanta plugin connects Claude Code to Vanta's security and compliance platform through the Vanta MCP server. It combines Vanta's test-specific remediation intelligence with…
Has a listing on Codex: openai-curated (openai/plugins) (5)
-
Evaluate Codex skills and plugins from chat with a beginner-friendly start command, local-first reports, token budget explanations, and guided benchmarking.
-
AI-powered code review in Codex, powered by CodeRabbit.
-
Inspect recent issues and events in Sentry from Codex.
-
Available for US1 customers only. Analyze, investigate, and act on your Datadog telemetry directly from ChatGPT using natural language. Ask questions about your production…
-
Inspect repositories, triage pull requests and issues, debug CI, and publish changes through a hybrid GitHub connector and CLI workflow.
Has a listing on Community GitHub marketplaces (5)
-
Automate API security directly in Claude Code with 42Crunch - automatically audit OpenAPI specs, detect vulnerabilities aligned with OWASP API Security risks (including…
-
HTTP/REST client with saved collections, env secrets, and SSRF-safe host allowlisting.
-
Read-only SQL querying + schema introspection over Postgres & SQLite, with a gated write mode.
-
Skills for adding DeepEval evaluations, tracing, datasets, Confident AI reports, and iterative improvement loops to AI applications.
-
Dash0 Observability
OpenTelemetry observability for OpenAI Codex sessions. Captures prompts, tool calls, MCP calls, sub-agent activity, and token usage as OTel traces.
Has a listing on Copilot CLI: github/awesome-copilot (5)
-
Three-layer verification pipeline for AI output. Extracts claims, finds sources, and flags hallucination risks so humans can verify before acting.
-
Safe BLE diagnostics, evidence workflows, and guarded automation for AI agents.
-
Visualizes live session AI-credit usage as a Pac-Man board with pellets, ghosts, fruit milestones, and game-over limits.
-
SAPUI5 / OpenUI5 plugin for GitHub CoPilot. Create and validate UI5 projects, access API documentation, run UI5 linter, get development guidelines and best practices for UI5…
-
Inspect a repository, improve Tiny Tool Town readiness, submit its listing issue, and launch remediation work.
Has a listing on Copilot CLI: github/copilot-plugins (5)
-
Advanced Security plugin for GitHub Copilot.
-
Toolkit for building Microsoft 365 Copilot declarative agents — scaffolding, JSON manifest development, and capability configuration.
-
Build Power Apps Canvas Apps using the Canvas Authoring MCP server.
-
workiq
Query Microsoft 365 data with natural language — emails, meetings, documents, Teams messages, and more.
-
Bring Azure DevOps work-item, repository, and pull-request workflows into GitHub Copilot.
Has a listing on Cursor: cursor/plugins (5)
-
CLI-backed repo compatibility scans plus agents that audit startup, validation, and docs against reality.
-
Build apps, scripts, and automations with the TypeScript SDK.
-
playwright-mcp io.github.microsoft/playwright-mcp
Playwright Tools for MCP
-
Browse and automate the web with TinyFish: run multi-step web automations, search the web, extract clean page content, and drive remote stealth browser sessions.
-
Read, write, and append spreadsheet data.
Has a listing on Docker MCP Catalog (5)
-
Fetch, validate, and generate code or curl from any OpenAPI or Swagger spec - all from a single URL.
-
mcp-neo4j-data-modeling io.github.neo4j-contrib/mcp-neo4j-data-modeling
A simple Neo4j MCP server for creating graph data models.
-
Analyze code quality and security with SonarQube Server or Cloud directly in AI assistants.
-
MCP server for using Semgrep to scan code for security vulnerabilities.
-
MCP server for AI access to SmartBear tools, including BugSnag, Reflect, Swagger, PactFlow, QTM4J.
Has a listing on Official MCP Registry (5)
-
Validate JSON against a schema with Ajv, infer a schema from samples and diff two schemas.
-
Validate JSON, YAML, XML and CSV with exact line/column errors and silent-corruption warnings.
-
Check whether text is valid JSON. The body is discarded.
-
Deterministic inspect, safe repair, and JSON Schema validation for agent JSON. No LLM.
-
Regex matching, email/URL format validation, and JSON Schema validation.
Found by meaning, not by shared code or a shared repository: similar plugins stay separate products, and this is not a review or a recommendation.
Is this your plugin?
Add it to your projects and prove you maintain it with a file in its repository, a file on your domain or a DNS record. You get alerts when a marketplace lists it, drops it, changes its verified mark or what it asks for, and its remote endpoint goes on monitoring as a web service.
Data comes from the Official MCP Registry (registry.modelcontextprotocol.io), CC0 1.0. Figures come from our own regular passes over the marketplaces, last read on . We publish no contact details for plugin publishers.