Koskamo

Machinegrade Validate MCP

A remote MCP server providing deterministic validation for AI-generated artifacts, supporting JSON Schema, OpenAPI response, and SQL syntax checks. It returns typed verdicts with fix hints to ensure structured output meets contracts before acting on it.

Endpoint and access

No sign-in to connect and list tools. Individual tools may still need a vendor account, credentials, or permissions; check the documented prerequisites.

Machinegrade Validate MCP logo, by machinegradeCommunity listingStreamable HTTPNo sign-inEndpoint checked 2026-11-07Published by machinegrade
You need:tools/call requires header X-Api-Key
MCP endpoint (Streamable HTTP)
https://api.machinegrade.dev/mcp
Vendor documentation

What its tools do

1 tool, grouped by the hints the server advertises. Hints are self-declared, not verified behavior.

Not annotated (1)

1 of 1 have a description · 0 of 1 declare behavior hints · 1 of 1 with parameters document them all

Checks and signals

Each line is separate evidence, not a trust score.

  • Passed Endpoint answered the live check ·
  • Availability 1 of 1 checks passed in 30 days

What you can do with it

  • Validate JSON artifacts against a JSON Schema contract
  • Check OpenAPI response conformance
  • Verify SQL syntax correctness

Source and maintenance

Community listingRegistry 0.1.2
mcp-registry: io.github.machinegrade/validate@0.1.2Source repositoryProject website
Maintenance checked

Protocol and capabilities

Server
machinegrade-validate-mcp 0.1.2
MCP protocol negotiated in check
2025-11-25
Tools
1 advertised
Resources
Not advertised
Resource templates
Not advertised
Prompts
Not advertised
Server-advertised capabilities
{
  "tools": {}
}

Tools

1 advertised

validate
Advertised by the server during the last successful anonymous check.

Validate an artifact against a contract (json_schema | openapi_response | sql) via the machinegrade validate API.

validate input schema
{
  "type": "object",
  "required": [
    "type",
    "artifact"
  ],
  "properties": {
    "type": {
      "enum": [
        "json_schema",
        "openapi_response",
        "sql"
      ],
      "type": "string",
      "description": "Which validator to run."
    },
    "artifact": {
      "type": [
        "object",
        "array",
        "string",
        "number",
        "boolean",
        "null"
      ],
      "description": "The artifact to validate, as a JSON value — not a JSON-encoded string. json_schema/openapi_response: the object/array/value itself. sql: the SQL statement as a string."
    },
    "contract": {
      "type": "object",
      "description": "Validator-specific contract. json_schema: { schema }. openapi_response: { spec, path, method, status }. sql: { dialect }."
    }
  }
}

Prompts

Not advertised

No prompt definitions available.

Resources

Not advertised

No resource definitions available.

30-day availability

Aggregated from read-only remote checks; this is not a tool-execution or security guarantee.

Successful checks
1 of 1 (100%)
Average latency
572 ms
95th percentile latency
572 ms

Maintenance history

Public check and source-refresh events. Editorial and ownership records remain private.

  • · probe · passed · 572 ms · metadata changed · 1 tool(s)

Connect from your client

Each snippet registers the same endpoint; pick the client you use.

This server is operated by the named third party. Listing and endpoint checks are not an endorsement or a security audit. Review the operator's permissions, terms, and data handling before connecting. How listings are checked and corrected.

Claude Code

Run this once in a terminal. It registers the remote server. Use --scope project to write .mcp.json for the repo.
Claude Code configuration
claude mcp add --transport http machinegrade-validate-mcp https://api.machinegrade.dev/mcp

Codex

Run this once. Codex stores MCP servers in ~/.codex/config.toml (or .codex/config.toml in a trusted project).
Codex configuration
codex mcp add machinegrade-validate-mcp --url https://api.machinegrade.dev/mcp

Cursor

Merge this server into .cursor/mcp.json in your project, then enable machinegrade-validate-mcp in your MCP settings.
Cursor configuration
{
  "mcpServers": {
    "machinegrade-validate-mcp": {
      "url": "https://api.machinegrade.dev/mcp"
    }
  }
}

Cline

Merge this into cline_mcp_settings.json (Cline → MCP Servers → Configure).
Cline configuration
{
  "mcpServers": {
    "machinegrade-validate-mcp": {
      "type": "streamableHttp",
      "url": "https://api.machinegrade.dev/mcp",
      "disabled": false
    }
  }
}

VS Code

Merge this server into .vscode/mcp.json. Use MCP: List Servers to start machinegrade-validate-mcp and inspect its tools.
VS Code configuration
{
  "servers": {
    "machinegrade-validate-mcp": {
      "type": "http",
      "url": "https://api.machinegrade.dev/mcp"
    }
  }
}

Gemini CLI

Run this once. It writes .gemini/settings.json in the current project; pass --scope user for ~/.gemini/settings.json.
Gemini CLI configuration
gemini mcp add --transport http machinegrade-validate-mcp https://api.machinegrade.dev/mcp

Claude Desktop

Open Claude Settings > Connectors > Add custom connector, enter this server URL and enable it for the conversation. This is a manual remote-connector handoff, not a desktop JSON configuration.
Claude Desktop configuration
https://api.machinegrade.dev/mcp

Windsurf

Merge this into ~/.codeium/windsurf/mcp_config.json, then refresh MCP in Cascade. Windsurf remote servers use serverUrl, not url.
Windsurf configuration
{
  "mcpServers": {
    "machinegrade-validate-mcp": {
      "serverUrl": "https://api.machinegrade.dev/mcp"
    }
  }
}

Let your agent find its tools

Find servers like Machinegrade Validate MCP from your agent. Add Koskamo once to search the index for endpoints, access requirements, and client setup. Public discovery needs no key.

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