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100
MCP live MCP 2026-07-28 http

schemaguard

sani/schemaguard

Repair to schema. Deterministic JSON Schema validation, intelligent repair, and provider diagnose for agents.

Watch this dependency Share evidence report
Uptime
100.0%
5 direct probes · 30d
Response
869ms
last probe
Tools
3
callable
Resources
1
readable
Prompts
1
available
Primary URL
https://schemaguard.schemaguard-663.workers.dev/mcp
Score: 100/100
Handshake verified by our own probe.
pass Answers the MCP handshake 50/50
The handshake and the list calls succeeded on the primary URL.
pass Lists tools, resources or prompts 30/30
3 tools, 1 resources, 1 prompts returned.
pass 3 or more catalogue items 10/10
5 items in total; 3 or more earns these points.
pass Describes itself 10/10
109 characters; more than 30 earns these points.

Tools · 3

validate

Return whether JSON matches a JSON Schema without mutating it. Call this to check; use repair when you need a patched instance.

repair

Return a schema-conforming JSON instance plus a patch audit trail. Call this when an agent produced JSON that failed validation.

diagnose

Report why a JSON Schema will fail OpenAI strict Structured Outputs, Anthropic strict tools, or Gemini. Call this before compiling a provider schema.

Resources · 1

llms

Agent-facing SchemaGuard one-liner, 402 curl example, endpoints, and payment terms.

schemaguard://llms.txt

Prompts · 1

repair-to-schema

Ask SchemaGuard to repair messy JSON onto a JSON Schema and return the patch trail.

How to use

Claude Desktop or claude.ai: add a custom connector (Customize → Connectors; on Team and Enterprise plans an owner adds it under Organization settings → Connectors) with this server URL: https://schemaguard.schemaguard-663.workers.dev/mcp

Cursor or Cline: add to your MCP config:

{
  "mcpServers": {
    "schemaguard": {
      "url": "https://schemaguard.schemaguard-663.workers.dev/mcp",
      "transport": "http"
    }
  }
}