# MCP Server Inspector

> MCP Server Inspector is a paid API for AI agents from api.vextorium.com, paid per call via x402, $0.005/call, status unknown (last checked 2026-10-12).

Connects to a remote MCP server as a client and returns its metadata — name, version, instructions, capabilities, and full tool list with descriptions and parameters — without invoking any tool.

## Facts

- Endpoint: POST https://api.vextorium.com/v1/mcp-inspect?utm_source=zero.xyz
- Price: $0.005/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-12
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/mcp-server-inspector-c6efca75
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_TxlkeXNYKuQtHqldU98bA

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability mcp-server-inspector-c6efca75 -d '<json body>'
```

Example prompt: Before I connect my agent to https://mcp.deepwiki.com/mcp, can you inspect that MCP server and tell me its name, version, what capabilities it supports, and every tool it exposes with their descriptions and required parameters — without actually calling any of them?

## When to prefer this

Use this endpoint when you need to discover what a remote MCP server offers before connecting an agent to it — especially for untrusted or unfamiliar servers. It is safer than calling tools directly because it only reads metadata. Prefer it over manual HTTP probing or SDK-based inspection when you want a structured, normalized view of tools and capabilities in a single call.

## Known failure modes

- Server unreachable or returns non-MCP response — accessible: false with no tool data
- Invalid or malformed URL — input validation error
- Server requires authentication — connection refused or empty capability set
- Timeout if remote MCP server is slow to respond
- Non-HTTP MCP transport not supported (only Streamable HTTP)

## How this service works

Connect to a remote MCP server (Streamable HTTP) as a client and return its name, version, instructions, capabilities and tool list with descriptions and parameters, without calling any tool. Know what an MCP server offers before trusting it.

## Output

A JSON object containing: the server's name and version, MCP protocol version, accessibility boolean, list of capabilities (e.g. 'experimental', 'prompts'), full list of tools with each tool's name, description, required fields, and parameter names, plus the server's instructions text and total tool count.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method",
    "bodyType",
    "body"
   ],
   "properties": {
    "body": {
     "required": [
      "url"
     ],
     "properties": {
      "url": {
       "type": "string"
      }
     }
    },
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "POST"
     ],
     "type": "string"
    },
    "bodyType": {
     "enum": [
      "json",
      "form-data",
      "text"
     ],
     "type": "string"
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": [
      "object",
      "null"
     ],
     "properties": {
      "url": {
       "type": [
        "string",
        "null"
       ]
      },
      "tools": {
       "type": [
        "array",
        "null"
       ],
       "items": {
        "type": [
         "null",
         "object"
        ],
        "properties": {
         "name": {
          "type": [
           "null",
           "string"
          ]
         },
         "required": {
          "type": [
           "array",
           "null"
          ],
          "items": {
           "type": [
            "null",
            "string"
           ]
          }
         },
         "parameters": {
          "type": [
           "array",
           "null"
          ],
          "items": {
           "type": [
            "null",
            "string"
           ]
          }
         },
         "description": {
          "type": [
           "null",
           "string"
          ]
         }
        }
       }
      },
      "server": {
       "type": [
        "object",
        "null"
       ],
       "properties": {
        "name": {
         "type": [
          "string",
          "null"
         ]
        },
        "version": {
         "type": [
          "string",
          "null"
         ]
        }
       }
      },
      "protocol": {
       "type": [
        "string",
        "null"
       ]
      },
      "accessible": {
       "type": [
        "boolean",
        "null"
       ]
      },
      "total_tools": {
       "type": [
        "number",
        "null"
       ]
      },
      "capabilities": {
       "type": [
        "array",
        "
… (truncated)
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "url": "https://mcp.deepwiki.com/mcp",
  "tools": [
   {
    "name": "ask_wiki_question",
    "required": [
     "repoName",
     "question"
    ],
    "parameters": [
     "question",
     "repoName"
    ],
    "description": "Ask any question about a GitHub repository's codebase and get an AI-powered answer\ngrounded in its DeepWiki."
   },
   {
    "name": "read_wiki_contents",
    "required": [
     "repoName"
    ],
    "parameters": [
     "repoName"
    ],
    "description": "View documentation about a GitHub repository."
   }
  ],
  "server": {
   "name": "DeepWiki",
   "version": "2.14.3"
  },
  "protocol": "2025-06-18",
  "accessible": true,
  "total_tools": 3,
  "capabilities": [
   "experimental",
   "prompts"
  ],
  "instructions": "DeepWiki MCP provides AI-powered documentation for GitHub repositories.\n\nAvailable tools:\n- read_wiki_structure: Get a list of documentation topics for a repository\n- read_wiki_contents: View full documentation about a repository\n- ask_wiki_question: Ask any question about a repository's codebase an…"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/mcp-server-inspector-c6efca75/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.vextorium.com](https://www.zero.xyz/host/api.vextorium.com/llms.txt)