Check LLC formation fees, deadlines, and name availability for all 50 US states.
Provides official LLC formation fees, annual report deadlines, recurring costs, and name-availability checks for all 50 states and DC. Helps small business owners compare where to form an LLC and understand state-specific requirements and costs.
Try asking Muse: "Show me the cheapest states to form an LLC and what the first-year costs would be."
Source: Found in the official MCP Registry (com.filingdesk/data) · First listed September 24, 2026
Each bar is one check, every 15 minutes. Green means it answered. Last checked 56 min ago.
What Muse can see: It does not ask you to sign in, so it cannot see your accounts. It only sees what Muse sends it from your request.
Before it acts: Read what Muse plans to do before you approve it, and remove the app from Muse when you stop using it.
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Not in Muse's Connectors list yet, but Muse can still use it. Copy the request below and paste it into Muse. Muse asks before it shares anything with the app's site. Meta does not review apps used this way, so only use ones you trust. We tested this in the Muse app on September 24, 2026: Muse used an app's link directly this way and returned a live answer.
https://filingdesk.com/api/mcpNot in Muse's Connectors list yet. Muse can still use it: its page gives you a request to paste into Muse.
FilingDesk Data is a remote MCP server, so any assistant that can add a custom connector by link can use it. Same link, same tools.
In ChatGPT, open Settings, then Connectors (called Apps & Connectors on some accounts).
Under Advanced settings, switch on Developer mode. That is what lets you add a connector by link.
Choose Create, give it a name, paste the link as the MCP server URL, and save. If it needs a sign-in, ChatGPT asks for it here.
Start a chat, open the tools menu, pick the connector, and ask. ChatGPT asks before it runs a tool the first time.
Custom connectors need a paid ChatGPT plan, and on Team, Enterprise and Edu accounts only an admin can add them. Our "Working" label means the server answered us; it cannot tell whether your plan lets you add it. All connectors that work in ChatGPT
In Claude, open Settings, then Connectors.
Choose Add custom connector, give it a name, and paste the link.
If it needs a sign-in, Claude sends you to it. Then turn the connector on in a chat from the tools menu and ask.
Custom connectors are available on paid Claude plans; on Team and Enterprise accounts an admin may need to add them. Our "Working" label means the server answered us; it cannot tell whether your plan lets you add it. All connectors that work in Claude
https://filingdesk.com/api/mcpResponse time at the last check: 1410ms. Worked in 99.5% of checks over 30 days.
Screened, no issues found
Screening looks for known threats and hidden instructions at the time of the check, and runs again weekly and whenever the tool list changes. It cannot see the server's code, so only connect what you need and review what Muse asks to do. How screening works.
get_llc_feesReturns one US state's LLC formation fee, its recurring annual-report or franchise-tax cost and cadence, online processing time, and known gotchas such as publication requirements, plus a labeled list of the official state source URLs the figures were taken from (dataset verifiedcompare_llc_costsRanks US states by LLC cost: the one-time formation fee, the recurring state fee, or the first-year total (formation plus one recurring period). Use when the user asks which state is cheapest to form or maintain an LLC in, or wants LLC costs compared across specific states. Coverget_annual_report_deadlineCalculates when an LLC's next annual report or franchise tax is due in a given state and the amount owed, and returns the state's rule text, late-filing consequences where the dataset has them (penaltyAndNotes), and the official state source URLs. Use when the user asks when theicheck_llc_nameScreens a proposed business name against state naming rules. It does NOT search any state registry and cannot tell whether a name is already taken. Wyoming and Delaware: the entity designator where the statute requires one (such as "LLC"), words that are restricted or need agencylist_filing_statesLists FilingDesk's coverage: the states it files formations in today with all-in prices, the states its naming-rule screen supports, and fee/deadline data coverage (all 50 states + DC). Use when the user asks which states FilingDesk can file in, or before stating that FilingDesk compare_formation_optionsReturns fixed, factual tradeoffs for deciding WHERE to form (topic "state": the home state versus Wyoming, Delaware, and Nevada, including the cost of foreign-qualifying back into the home state) or WHAT entity type to use (topic "entity_type": LLC versus the S-corp tax election preview_orderValidates and prices a formation order and returns the exact summary that would be submitted, WITHOUT submitting anything (no side effects). Use when the user wants FilingDesk to form their LLC or corporation and has provided the business name, state, entity type, and their name,submit_orderSubmits a formation order to FilingDesk. THIS HAS A REAL-WORLD EFFECT: it records the order, notifies a FilingDesk specialist, and may send an automatic order-confirmation email to the customer's email address. The specialist then reviews the order, confirms name availability andhttps://filingdesk.com/api/mcpNot in Muse's Connectors list yet, but Muse can still use it. Paste this into Muse: "Use FilingDesk Data to help me. It is a free service with an MCP server at https://filingdesk.com/api/mcp. It does not need an API key. Ask me before you share anything with it." Muse asks before it shares anything with the app's site. Meta does not review apps used this way, so only use ones you trust. We tested this in the Muse app on September 24, 2026: Muse used an app's link directly this way and returned a live answer.
At the last check (November 13, 2026, 13:30 UTC) the endpoint was working, answering in 1410ms. Over the last 7 days it answered 100% of health checks. It is checked every 15 minutes.
It was screened on September 24, 2026 with the result "screened, no issues found". Screening checks the domain against threat feeds and reads the tools for hidden instructions and requests for passwords or card numbers. It cannot see the server's code, so grant only the access you need.
It exposes 8 tools, including get_llc_fees, compare_llc_costs, get_annual_report_deadline, check_llc_name. For example, you could ask Muse: "Show me the cheapest states to form an LLC and what the first-year costs would be."
This listing was added from public sources (Found in the official MCP Registry (com.filingdesk/data)). If you build FilingDesk Data, claim it to correct the details and get your badge.
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