# Connect your tool (/docs/connect)

quarry is an MCP server. MCP (Model Context Protocol) is how assistants, coding
agents, and frameworks plug in outside tools: you give them an address.

quarry has two:

| You want to                                                        | Address                                                                                                                                                                                              |
| ------------------------------------------------------------------ | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| Search quarry and read free datasets, with no account              | The free address, `https://quarry.market/api/mcp`                                                                                                                                                    |
| Use quarry in Claude, connecting your account when Claude needs it | The free address, filled in by [Add quarry to Claude](https://claude.ai/customize/connectors?modal=add-custom-connector\&connectorName=quarry\&connectorUrl=https%3A%2F%2Fquarry.market%2Fapi%2Fmcp) |
| Also use your subscriptions, signing in when your tool asks        | The sign-in address, `https://quarry.market/api/agent/mcp`                                                                                                                                           |
| Use your subscriptions from code or a server                       | The free address, with an [API key](/docs/subscriptions#api-keys) sent as `Authorization: Bearer qk_...`                                                                                             |

The sign-in address is also shown under **Connected agents** on your
[Subscriptions](/subscriptions) page. An agent that holds its own USDC wallet can
pay per question with the free address and no account: see
[Give your assistant a wallet](/docs/wallet).

## Pick your tool [#pick-your-tool]

* [Chat assistants](/docs/connect/assistants): Claude and ChatGPT, plus Perplexity
  and Mistral Le Chat for free datasets.
* [Coding agents](/docs/connect/coding-agents): Claude Code, Cursor, VS Code,
  Codex, Devin, Gemini CLI, Goose, and OpenClaw.
* [Frameworks and SDKs](/docs/connect/frameworks): LangChain, LlamaIndex, the
  OpenAI Agents SDK, Pydantic AI, Google ADK, CrewAI, the Vercel AI SDK, Mastra,
  and the OpenAI and Anthropic APIs.
* [Other platforms](/docs/connect/platforms): Microsoft Copilot Studio, n8n, and
  OpenAPI imports.

Setting quarry up for a team? See
[Share with your team](/docs/subscriptions#teams).

## Try it [#try-it]

Once connected, ask a question that needs sources, such as "Find a dataset on
semiconductor supply and cite what it says about lead times." Your assistant
searches quarry, picks a dataset, asks it, and cites the file, page, and listing
link.