Advertise
MCP.so
Sign In

Schemacheck Agent MCP Server

@garyedgington

Repository

Basic information

Category

AI & Agents

Transports

stdio

Author

garyedgington

Submitted by

Gary Edgington

About Schemacheck Agent MCP Server

SchemaCheck Agent validates JSON payloads against JSON Schema Draft 7 and 2020-12 standards. Designed for agent-to-agent workflows, it returns structured validation results instantly — including field-level error paths, human-readable summaries, and optionally a corrected payload

#json-schema#validation#json#data-validation#schema#micropayment#x402#usdc#base#agent#api#fastapi#developer-tools#structured-output#repair

Schemacheck Agent MCP Server config

Add this server to your MCP-compatible client using the configuration below.

{
  "mcpServers": {
    "schemacheck-agent": {
      "url": "https://projectx402-production.up.railway.app/sse"
    }
  }
}

Schemacheck Agent MCP Server tools

2

Validate a JSON payload against a JSON Schema. Returns whether the payload is valid, a list of structured validation errors, a human-readable summary, and -- when repair=True and the payload is invalid -- a suggested corrected payload. Args: json_schema: A valid JSON Schema object (Draft 2020-12 or Draft-07). payload: The JSON value to validate (object, array, string, number, boolean, or null). strictness: Controls repair aggressiveness. "strict" -- only fill fields that have explicit defaults. "normal" -- fill missing required fields with type defaults. "lenient" -- same as normal (future: may coerce types). repair: When True and the payload is invalid, attempt to produce a suggested_payload that satisfies the schema. explain: When True, include a human-readable explanation in summary. Returns: valid (bool), errors (list), summary (str), suggested_payload (any|null), confidence (float), meta (dict).

Validate a JSON payload against a JSON Schema (free trial, no repair). Identical to validate_schema but repair suggestions are always disabled. Use this for lightweight checks where a corrected payload is not needed. Args: json_schema: A valid JSON Schema object (Draft 2020-12 or Draft-07). payload: The JSON value to validate. explain: When True, include a human-readable explanation in summary. Returns: valid (bool), errors (list), summary (str), suggested_payload (null), confidence (float), meta (dict).

Overview

What is Schemacheck Agent?

Schemacheck Agent is a machine-native paid API that validates JSON payloads against JSON Schema. It returns structured validation results including validity, errors with JSONPath locations, a plain-English summary, and optional corrected payload suggestions. Built for autonomous agents, backend pipelines, and developers who need reliable per-call JSON validation.

How to use Schemacheck Agent?

Connect an MCP-compatible client to https://projectx402-production.up.railway.app/mcp for tool-based usage, or call the REST endpoints directly. The free trial endpoint requires no payment; the paid endpoint uses x402 v2 USDC micropayments of $0.005 per call on Base mainnet. MCP tools available are validate_schema (full, with repair) and validate_schema_trial (free, no repair).

Key features of Schemacheck Agent

  • Validates JSON payloads against any JSON Schema
  • Returns structured errors with JSONPath locations
  • Provides plain-English validation summaries
  • Suggests corrected payloads on paid endpoint
  • Supports strict, normal, and lenient validation modes
  • MCP Streamable HTTP and REST + x402 access modes

Use cases of Schemacheck Agent

  • AI agents validating structured outputs against a schema
  • Backend pipelines performing per-call JSON validation without library dependencies
  • Developers prototyping or debugging JSON Schema compliance
  • Automated repair of malformed payloads in data ingestion flows

Frequently asked questions

1

What access modes does Schemacheck Agent support?

Schemacheck Agent supports MCP tools via Streamable HTTP and REST endpoints with x402 USDC micropayments on Base mainnet.

2

Is there a free way to try Schemacheck Agent?

Yes, the trial endpoint at `POST /v1/schema-check/trial` is free but limited to 32KB request bodies and does not include repair functionality.

3

What is the cost per call for the paid endpoint?

Each paid call costs $0.005 USDC, processed via the x402 v2 micropayment protocol on Base mainnet.

4

Does Schemacheck Agent require a runtime or library installation?

No. Schemacheck Agent is a remote API — no local library or runtime dependencies are needed beyond an HTTP client or MCP-compatible agent.

5

What data does Schemacheck Agent return when validation fails?

The response includes an array of errors with path, error code, message, and schema path; a plain-English summary; a confidence score; and optionally a suggested corrected payload.

Comments

More AI & Agents MCP servers

DatePhotos.AI

Jacob Yang

Free MCP server for dating profiles. Look up the official photo rules and AI-photo policies of Tinder, Hinge and Bumble — photo limits, verification, what gets you banned — each quoted from the app's own guidelines wi

Atwork

Atwork Team

Connect Atwork to Claude, ChatGPT, Cursor or any MCP client and work with your real data: ask what is overdue, total a sheet by any field, add tasks, update rows, post comments and draft pages. The assistant acts as you

Sphere Marketplace

dtajitdinov-aris

Sphere is an exchange where AI agents list services and post requests for other agents. Registration is one request, free, with no human approval. The first order is free: sphere_receipt_trial, one per agent per 24 hours

OpenZiti MCP Gateway

openziti

NetFoundry MCP Gateway enables secure, isolated access to Model Context Protocol (MCP) tools across distributed systems without exposing public endpoints. Zero trust gateway for MCP servers. Aggregate, filter, and secure

48

BlazingCDN MCP - Content Delivery for Video, Software & Static Files

BlazingCDN

Official MCP server for BlazingCDN - AI agents (Claude, Cursor, Windsurf) manage CDN resources, purge cache, query metrics, domains, Anycast CDN, Video CDN and Media CDN

1
Advertise