Grafbase

Instant GraphQL API platform.

CommunityOnlineNo sign-inGlobalFreeRead-only

What it can do

  • Introspect: Provide the complete GraphQL SDL for the requested types. Always use `search` first to identify relevant fields before if information on a specific type was not explicitly requested. Conti
  • Search: Search for relevant fields to use in a GraphQL query. A list of matching fields with their score is returned with partial GraphQL SDL indicating how to query them. Use `introspect` tool to req
  • Execute: Executes a GraphQL request. Additional GraphQL SDL may be provided upon errors.

What data it sees

Do you need an account

No: the server works without sign-in

Instant GraphQL API platform. Deploy APIs, manage schemas, and query federated data sources at the edge.

How to connect

How to connect Grafbase to Claude

The server address to paste into Claude settings:

https://grafbase.run.tools

  1. Open Claude (claude.ai or the desktop app).
  2. Go to Settings → Connectors.
  3. Click Add custom connector.
  4. Paste the server address copied below into Remote MCP server URL and click Add.
  5. In a chat, click + → Connectors and switch the new connector on.

Custom connectors are available on Free, Pro, Max, Team and Enterprise plans (Free is limited to one). On Team and Enterprise an organization Owner adds the connector first under Organization settings → Connectors.

Authorization

After you click Add, a sign-in window for the service opens. Sign in with your own account and approve access. Claude never sees your password.

How to connect Grafbase to ChatGPT

The server address to paste into ChatGPT settings:

https://grafbase.run.tools

  1. Open ChatGPT in a browser (chatgpt.com). A Plus, Pro, Business, Enterprise or Edu plan is required.
  2. Turn on developer mode once: Settings → Apps → Advanced settings → Developer mode.
  3. Open Settings → Connectors and click Create.
  4. Fill in the form: Name (anything), Description (one line about what the service does), MCP server URL (copy it below).
  5. Under Authentication choose OAuth if the service requires sign-in, otherwise None. Click Create.
  6. In a new chat open + → Apps/Connectors and enable the connector.

OpenAI has renamed this section before (Connectors → Apps/Plugins). If the label differs, search settings for "developer mode". On Business/Enterprise workspaces an admin must allow custom connectors first.

Authorization

On first use ChatGPT opens the service's sign-in window. Sign in and approve access.

How to connect Grafbase to Cursor

The server address to paste into Cursor settings:

https://grafbase.run.tools

Fastest: click Open in Cursor below and confirm the prompt.

Manually:

  1. In Cursor open Settings → Cursor Settings → MCP and click Add new global MCP server.
  2. Paste the JSON copied below into ~/.cursor/mcp.json (per project: .cursor/mcp.json in the repo root).
  3. Save the file. The server appears in the MCP list; authorize it there if asked.

Authorization

If the service needs sign-in, an authorize button appears next to the server in the MCP list.

Server tool list (3)

Raw names from tools/list. Only developers need these.

introspectProvide the complete GraphQL SDL for the requested types. Always use `search` first to identify relevant fields before if information on a specific type was not explicitly requested. Continue using this tool until you have the definition of all nested types you intend to query.
searchSearch for relevant fields to use in a GraphQL query. A list of matching fields with their score is returned with partial GraphQL SDL indicating how to query them. Use `introspect` tool to request additional information on children field types if necessary to refine the selection set.
executeExecutes a GraphQL request. Additional GraphQL SDL may be provided upon errors.