Does blurrah/mcp-graphql work with Claude Desktop?

Yes. The README provides a Claude Desktop configuration using the `mcp-graphql` package and also documents installation through Smithery.

How do I configure a GraphQL endpoint for blurrah/mcp-graphql?

Set the `ENDPOINT` environment variable to the GraphQL URL. If it is omitted, the server uses `http://localhost:4000/graphql`.

How do I enable GraphQL mutations in blurrah/mcp-graphql?

Set `ALLOW_MUTATIONS=true`. Mutations are disabled by default.

Can blurrah/mcp-graphql use a local GraphQL schema file?

Yes. Set `SCHEMA` to the local schema path. The variable can also point to a schema file hosted at a URL.

MCP Graphql

graphqldeveloper-toolsapischema-introspection

Connects MCP clients to GraphQL endpoints for schema discovery and query execution, with mutations disabled by default.

Quick Install

Automated & IDE Setup

Copy the AI prompt to install this server into Claude Code, Cursor, or another agent — or use 1-click editor setup below.

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Manual Client & Custom JSON ConfigExpand JSON ▾

Client Config & Setup

Choose your client or environment

Target File:~/Library/Application Support/Claude/claude_desktop_config.json

claude_desktop_config.json

{
  "mcpServers": {
    "blurrah-mcp-graphql": {
      "command": "npx",
      "args": [
        "-y",
        "mcp-graphql"
      ]
    }
  }
}

💡 Paste the JSON block into your client's configuration file under mcpServers, then restart the application.

Overview

The blurrah/mcp-graphql MCP server lets AI clients inspect a GraphQL schema and execute queries against a configured endpoint. It can obtain the schema through GraphQL introspection, a local file, or a URL, and exposes the result as an MCP resource. Configure the endpoint and optional request headers through environment variables; enable mutations separately when write operations are appropriate. Reach for it when an agent needs dynamic access to an existing GraphQL API rather than a narrowly scoped custom MCP server.

Use cases

Inspect a GraphQL schema before generating queries

Execute read-only GraphQL queries from an MCP client

Load a schema from a local file or URL

Send custom authorization headers to a GraphQL endpoint

Key features

GraphQL schema introspection

GraphQL query execution

Schema resource exposure

Custom request headers

Optional mutation support

Local or remote schema sources

Capabilities & Tool Schemas (2)Self-reported

Inspect callable tools, capabilities, and parameters exposed to AI agents by MCP Graphql.

introspect-schema

This tool retrieves the GraphQL schema. Use this first if you don't have access to the schema as a resource.

query-graphql

Execute GraphQL queries against the endpoint. By default, mutations are disabled unless `ALLOW_MUTATIONS` is set to `true`.

How MCP Graphql works

What blurrah/mcp-graphql does

The blurrah/mcp-graphql MCP server connects an MCP client to a GraphQL API. It provides schema discovery and query execution so a model can learn the available types and fields before constructing requests. The server is intended for generic GraphQL access rather than an API-specific set of fixed tools.

A graphql-schema resource is also exposed to clients. Its contents can come from a local schema file, a schema file available at a URL, or an introspection request sent to the configured GraphQL endpoint.

How it works

The blurrah/mcp-graphql MCP server uses the configured ENDPOINT value as the target for GraphQL requests. The introspect-schema tool retrieves the schema when the client does not already have it as a resource. The query-graphql tool then sends GraphQL queries to the same endpoint.

Request headers are supplied as a JSON string through HEADERS. This can be used for API-specific headers such as an authorization header, although the README does not define a particular authentication provider or token format. A schema can be supplied independently with SCHEMA, using either a local path or a URL, instead of relying solely on endpoint introspection.

Setup and configuration

Run the package with the target endpoint supplied through environment variables. The endpoint defaults to http://localhost:4000/graphql, while headers default to an empty JSON object. NAME changes the MCP server name and defaults to mcp-graphql.

Relevant configuration includes:

ENDPOINT: GraphQL service URL.
HEADERS: JSON-encoded request headers.
SCHEMA: Local schema path or remote schema URL.
ALLOW_MUTATIONS: Set to true to permit mutation operations; it is false by default.
NAME: MCP server name.

The README shows installation through npx mcp-graphql and a Claude Desktop configuration using the same package. For noninteractive execution, use the package runner with its confirmation flag.

Tools and capabilities

The blurrah/mcp-graphql MCP server exposes two tools:

introspect-schema obtains the GraphQL schema from the configured schema source or through an introspection query.
query-graphql executes GraphQL queries against the endpoint.

The schema is additionally available through the graphql-schema resource. This gives clients a way to read schema information without invoking the introspection tool when the resource is already available.

Limitations and notes

Mutations are blocked unless ALLOW_MUTATIONS=true is configured. This default reduces the risk of an agent changing data in the connected service, but enabling mutations should be evaluated carefully for production use.

The server offers broad GraphQL access rather than restricting clients to selected fields or operations. The README recommends creating a more specific MCP implementation when clients need tightly controlled queries or variables. The provided material does not document subscriptions, a built-in authentication mechanism, or provider-specific GraphQL features.

Getting started with this blurrah/mcp-graphql MCP server

Always refer to the official documentation for the most accurate and up-to-date information.

Read the full README →View source on GitHub →

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Frequently Asked Questions about MCP Graphql

Run it with the npm package using npx, for example `npx -y mcp-graphql`. Configure `ENDPOINT` and any other environment variables required by your GraphQL service.

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Scanned 20d ago via OSV.dev · mcp-graphql (npm)

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