Introspect GraphQL schemas — list types, query/mutation/subscription fields, search patterns, get SDL definitions via mcp-graphql-schema (npx)

{
  "server": "mcp-graphql-schema",
  "version": "0.0.2",
  "transport": "stdio",
  "install": "npm install mcp-graphql-schema",
  "entry": "node index.mjs /path/to/schema.graphqls",
  "tools_count": 10,
  "calls": 17,
  "success_rate": "100%",
  "p50_ms": 0,
  "first_call_ms": 1,
  "tested_tools": [
    {
      "tool": "list-types",
      "result": "Query, ID, Int, String, Mutation, Boolean, Subscription, User, Post, Comment, UserConnection, PageInfo, SearchResult, CreateUserInput, UpdateUserInput, CreatePostInput, UserFilter, UserRole, PostSort, SearchType, DateTime"
    },
    {
      "tool": "list-query-fields",
      "result": "user, users, post, posts, search"
    },
    {
      "tool": "list-mutation-fields",
      "result": "createUser, updateUser, deleteUser, createPost, likePost"
    },
    {
      "tool": "list-subscription-fields",
      "result": "postCreated, userStatusChanged"
    },
    {
      "tool": "get-type",
      "args": {
        "typeName": "User"
      },
      "result": "type User { id: ID! username: String! email: String! ... createdAt: DateTime! updatedAt: DateTime! }"
    },
    {
      "tool": "get-type-fields",
      "args": {
        "typeName": "Post"
      },
      "result": "id: ID!
title: String!
content: String!
...published: Boolean!
createdAt: DateTime!
updatedAt: DateTime!"
    },
    {
      "tool": "get-query-field",
      "args": {
        "fieldName": "users"
      },
      "result": "users(filter: UserFilter, limit: Int = 10, offset: Int = 0): UserConnection!"
    },
    {
      "tool": "get-mutation-field",
      "args": {
        "fieldName": "createPost"
      },
      "result": "createPost(input: CreatePostInput!): Post!"
    },
    {
      "tool": "get-subscription-field",
      "args": {
        "fieldName": "postCreated"
      },
      "result": "postCreated(authorId: ID): Post!"
    },
    {
      "tool": "search-schema",
      "args": {
        "pattern": "user"
      },
      "result": "Matching types: User, UserConnection, CreateUserInput, UpdateUserInput, UserFilter, UserRole
Matching fields: Query.user, Query.users, Mutation.createUser, Mutation.updateUser, Mutation.deleteUser, Subscription.userStatusChanged, User.username, CreateUserInput.username"
    },
    {
      "tool": "search-schema",
      "args": {
        "pattern": "create"
      },
      "result": "Matching types: CreateUserInput, CreatePostInput
Matching fields: Mutation.createUser, Mutation.createPost, Subscription.postCreated, User.createdAt, Post.createdAt, Comment.createdAt"
    },
    {
      "tool": "get-type",
      "args": {
        "typeName": "UserRole"
      },
      "result": "enum UserRole { ADMIN MODERATOR USER GUEST }"
    },
    {
      "tool": "get-type",
      "args": {
        "typeName": "CreatePostInput"
      },
      "result": "input CreatePostInput { title: String! content: String! tags: [String!] published: Boolean = false }"
    },
    {
      "tool": "get-type",
      "args": {
        "typeName": "SearchResult"
      },
      "result": "union SearchResult = User | Post | Comment"
    },
    {
      "tool": "get-type-fields",
      "args": {
        "typeName": "UserRole"
      },
      "result": "Type "UserRole" is not an object type with fields"
    },
    {
      "tool": "get-type",
      "args": {
        "typeName": "DoesNotExist"
      },
      "result": "Type "DoesNotExist" not found"
    },
    {
      "tool": "get-query-field",
      "args": {
        "fieldName": "nonexistent"
      },
      "result": "Field not found or has no definition"
    }
  ]
}