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8 clients · secrets stay placeholders

JSON (mcpServers)Claude CodeCodexOpenCodeCursorVS CodeGemini CLIGoose

{
  "mcpServers": {
    "mcp-auth-preflight": {
      "type": "http",
      "url": "https://auth.inversolabs.us/mcp"
    }
  }
}

claude mcp add --transport http mcp-auth-preflight https://auth.inversolabs.us/mcp

[mcp_servers.mcp-auth-preflight]
url = "https://auth.inversolabs.us/mcp"

{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "mcp-auth-preflight": {
      "type": "remote",
      "url": "https://auth.inversolabs.us/mcp",
      "enabled": true
    }
  }
}

{
  "mcpServers": {
    "mcp-auth-preflight": {
      "type": "http",
      "url": "https://auth.inversolabs.us/mcp"
    }
  },
  "deeplink": "cursor://anysphere.cursor-deeplink/mcp/install?name=mcp-auth-preflight&config=eyJ0eXBlIjoiaHR0cCIsInVybCI6Imh0dHBzOi8vYXV0aC5pbnZlcnNvbGFicy51cy9tY3AifQ%3D%3D"
}

{
  "servers": {
    "mcp-auth-preflight": {
      "type": "http",
      "url": "https://auth.inversolabs.us/mcp"
    }
  }
}

{
  "mcpServers": {
    "mcp-auth-preflight": {
      "httpUrl": "https://auth.inversolabs.us/mcp"
    }
  }
}

extensions:
  "mcp-auth-preflight":
    enabled: true
    name: "mcp-auth-preflight"
    type: streamable_http
    uri: "https://auth.inversolabs.us/mcp"
    timeout: 300

Quality 84 / 100good

protocol100 · weight 25

pass
protocol.modernsupports 2026-07-28 (server/discover)
pass
protocol.statelessanswers without a session
pass
protocol.transportstreamable HTTP
pass
protocol.list_ttltool list is cacheable (ttlMs 300000)

authorizationn/a · weight 15

n/a
auth.prm, auth.as_metadata, auth.cimdno remote uses OAuth
n/a
auth.secret_in_urlno templated URL

tool hygiene71 · weight 30

pass
tools.descriptionsevery tool has a description
pass
tools.description_lengthdescriptions are concise
pass
tools.schemasevery tool has an object input schema
fail
tools.annotationsno tool declares readOnlyHint or destructiveHint, so clients cannot tell safe calls from risky ones
fail
tools.directory_hintsno tool declares all four of readOnlyHint, destructiveHint, idempotentHint and openWorldHint; missing: mcp_auth_compatibility_preflight (readOnlyHint, destructiveHint, idempotentHint, openWorldHint)
pass
tools.token_costabout 181 tokens to load every tool
pass
tools.api_dumptools are not a one-to-one API dump

stabilityn/a · weight 15

n/a
stability.changes, stability.rug_pulltool history recorded for 1 of the 7 days needed

dependenciesn/a · weight 15

n/a
deps.known_vulns, deps.mcp_sdk_version, deps.resolvableno npm or PyPI package

1 tools, about 181 tokens to load them all · tool set b9675b27cd84 · checked 2026-10-19 10:52 UTC

Tool changes

No tool definition changes recorded. A server's first observation is its baseline; later probes record what changes.

Checks run on what our credential-free, read-only probes observe; tools are never called and no code audit is performed. How it is computed.

Trust 47 / 100

no-repository

provenance45

liveness0

freshness85

hygiene80

+dns-namespace -unreachable(2 failures) ~updated-54d-ago -no-repository

Derived from observable signals (official registry feed and our own credential-free probes); no code audit performed. How it is computed.

Endpoints

remote	auth	reachable	uptime 30d	p50	protocol	last ok
`https://auth.inversolabs.us/mcp` streamable-http	none	no (2 failures)	13%	248 ms	2026-07-28	2026-10-18

Tools (1)

mcp_auth_compatibility_preflight Validate MCP protected-resource and OAuth authorization-server metadata; diagnose PKCE and client compatibility; and predict interoperability failures before connecting, without accepting credentials.

Schemas: list_tools.

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More from us.inversolabs

Official server.json

{
  "name": "us.inversolabs/mcp-auth-preflight",
  "title": "MCP Auth Preflight",
  "$schema": "https://static.modelcontextprotocol.io/schemas/2025-12-11/server.schema.json",
  "remotes": [
    {
      "url": "https://auth.inversolabs.us/mcp",
      "type": "streamable-http"
    }
  ],
  "version": "0.1.19",
  "description": "Preflight MCP OAuth compatibility with structured evidence and remediation guidance."
}