A connector is an MCP server Marvin Labs runs on its own infrastructure. Marvin Labs holds the upstream credentials, so you do not supply a URL, an API key, or a sign-in. Connecting your own MCP server is the other case: you bring the endpoint and the account.

Which connectors are available?

GovInfo is the first, covering the full text of US federal legislation from the US Government Publishing Office. It has two tools: a full-text search across bill text, and a reader for opening a specific bill. More connectors follow over the coming weeks, starting with further US Government data.

Are connectors on by default?

Yes. Every connector is on when it ships, and settings has a switch to turn each one off. Tools stay out of the model's context until a request needs them, so unused connectors do not fill the window.

Do connectors change how financial data is sourced?

No. When filings, earnings calls, and press releases ingested through Automated Data Import cover the question, Marvin Labs answers from those, with every insight linked back to the source passage. Connectors supply data those sources do not hold, and the answer attributes it to the connector it came from.

Can I still connect my own MCP server?

Yes. The provider list now makes it faster. Daloopa, Fiscal.ai, Financial Datasets, and Notion connect with one click and a sign-in, Alpha Vantage with an API key. Anything else is added manually with a URL and auth token. You bring your own account in every case.

Who can use connectors?

Connectors are available on all paid plans and to evaluation users, on the same terms as connecting your own MCP servers.

MCP Connectors Hosted by Marvin Labs for Equity Analysts

Connectors are live. These are MCP servers Marvin Labs hosts and authenticates, so you do not add a URL or an API key. They are on by default. Settings has a switch to turn each one off.

In July we shipped connecting your own MCP servers. You add a provider's endpoint and run through that provider's auth setup, and AI Analyst Chat and Deep Research Agents can call that provider's tools. That covers the vendors you subscribe to and the systems your firm runs. Public sources have no vendor account to bring, and the same free endpoint and API key would otherwise get pasted into every workspace.

The MCP servers settings page in Marvin Labs, showing a connected Alpha Vantage server, the provider catalog with Daloopa, Fiscal.ai, Financial Datasets, Alpha Vantage and Notion, and the GovInfo connector provided by Marvin Labs

Tools stay out of context until they are needed

Every extra tool carries a description and instructions, and those tokens sit in the model's context whether the request needs them or not. A few dozen connectors and MCP servers is enough to crowd out the material that actually answers the question. Quality drops once the window fills.

Tools now stay out of context until a request needs one. The model finds them through search. General-purpose tools stay up front, the ones used on almost every turn: reading documents, fetching financials. Specialist tools, including connectors, your own MCP servers, and predefined agents such as Guidance Tracking and tariff research, are found when the request calls for them. Connectors stay on by default, and you can add your own MCP servers, without unused tools taking up the window.

Validated sources still come first

The preference order is the same as when you connect your own MCP servers. When a request can be answered from the filings, earnings calls, and press releases ingested through Automated Data Import, Marvin Labs answers from those. That content is validated, linked back to the source passage, and consistent across every feature in the platform. Connectors do not override it, and turning one on does not change how primary financial content is sourced.

Connectors and connected servers bring in data the platform does not already have. The copilot reaches for one when the request needs that additional data, and the answer attributes it. The tool call and its output sit in the thread, so you can tell what came from the connector or vendor and what came from a filing.

First connector: GovInfo

The first connector covers the full text of US federal legislation. More follow over the coming weeks, starting with further US Government data.

GovInfo is the US Government Publishing Office's official repository for federal publications. The connector covers its bills collection, the published text of legislation introduced in Congress, through two tools:

Search bills runs a full-text query across published bill text and returns ranked matches.
Read bill opens one of them, using the same three modes as Marvin Labs' own document reader. Preview it, search within it, or read a specific range.

Ask AI Analyst Chat what Congress is doing on semiconductor export controls and the search surfaces H.R. 8287, the Semiconductor Controls Effectiveness Act of 2026. The bill directs the State Department to report on how well existing controls on chips and manufacturing equipment sold to China are actually working. It cleared the House Foreign Affairs Committee unanimously in April 2026.

We wrote this connector rather than wrapping an existing package. The full-text index and the relevance ranking are GPO's either way. Some clients put a natural language layer in front of that index, inferring collection, date range, and sort order from a sentence. The agent already knows what it is looking for, so it queries the index directly.