# 501c3.HELP Nonprofit Compliance Muse connector

From musedirectory.ai, the independent directory of Meta Muse connectors. Not affiliated with Meta.

## 501c3.HELP Nonprofit Compliance

Look up nonprofit compliance rules for any US state with official citations and verification status.

- Record: https://musedirectory.ai/connector/501c3-help-nonprofit-compliance
- Category: Legal
- Developer: 501c3.help (https://501c3.help/license/)
- Muse status: Extra setup. Not in Muse's Connectors list yet. Muse can still use it: its page gives you a request to paste into Muse.
- Health: Working, 245ms, checked 2026-10-29T13:01:00Z
- Endpoint: https://mcp.501c3.help/
- Auth: No account needed; Pricing: unknown
- Screening: Screened, no issues found (2026-10-28T17:16:31Z)
- Source: Found in the official MCP Registry (help.501c3/compliance) https://registry.modelcontextprotocol.io/v0/servers?search=help.501c3%2Fcompliance

Provides nonprofit formation, governance, solicitation, reporting, tax and employment compliance requirements for all 50 US states. Each rule includes official citations and verification status. Compare requirements across states or check filing deadlines and fees.

Example request: "What are the charitable solicitation registration requirements for nonprofits in California and New York?"

How to connect: Not in Muse's Connectors list yet, but Muse can still use it. Paste this into Muse: "Use 501c3.HELP Nonprofit Compliance to help me. It is a free service with an MCP server at https://mcp.501c3.help/. 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.

Tools:
- get_state_requirements: Nonprofit compliance requirements for one US state, from 501c3.help's sourced records: formation, governance, charitable solicitation registration, reporting, tax and employment. Every record carries its official citation and a verification status. Records marked review_required 
- compare_states: The same compliance topic across several US states, for deciding where to incorporate or for an organization that operates in more than one state. Each state's records carry their own citation and verification status; a record marked review_required is unsettled and must not be p
- get_filing_deadlines: Every requirement in one US state that has a filing deadline attached, with the deadline in plain words, the form or portal, the fee, and the official citation. Use this for 'what is due and when'. Deadlines on records marked review_required are not settled and must be shown as u

Screening checks:
- MCP handshake: pass (Answered in 81ms)
- Domain against threat feeds (Cloudflare security DNS): pass (mcp.501c3.help, 501c3.help not flagged)
- Published packages against the OSV malicious-package database: n/a (No npm or PyPI package published)
- Hidden instructions or invisible characters in tool text: pass (3 tools read, nothing found)
- Inputs asking for passwords, card numbers or seed phrases: pass (None found)
- Domain and redirects: pass (No redirects off the domain)
- AI review of purpose and tool behavior: pass (No concerns)