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MCP Server

501c3.HELP nonprofit compliance

help.501c3/compliance
Legal & Compliance Public & reachable MCP 2026-07-28

What this MCP does

Provides sourced nonprofit formation, governance, registration, reporting, tax, employment, and filing-deadline requirements across US states.

Capabilities

Tools

3 tools
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 presented as a settled rule. Accepts up to eight states.
Input schema 
{'type': 'object', 'required': ['states', 'topic'], 'properties': {'topic': {'type': 'string', 'description': "The topic to compare, for example 'solicitation', 'reporting', 'formation', 'tax'."}, 'states': {'type': 'array', 'items': {'type': 'string'}, 'description': 'State names or two-letter abbreviations. Up to eight.'}}}
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 unconfirmed.
Input schema 
{'type': 'object', 'required': ['state'], 'properties': {'state': {'type': 'string', 'description': 'State name or two-letter abbreviation.'}}}
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 are unsettled and must be presented as such, never as a settled rule. Optionally narrow by topic. Returns a limited number of records, not the whole state.
Input schema 
{'type': 'object', 'required': ['state'], 'properties': {'state': {'type': 'string', 'description': "State name or two-letter abbreviation, for example 'Kansas' or 'KS'."}, 'topic': {'type': 'string', 'description': "Optional topic filter, matched loosely, for example 'solicitation', 'reporting', 'tax'."}}}
History

Recent tool changes

Added
get_filing_deadlines
Oct. 3, 2026, 2:40 a.m.
Added
compare_states
Oct. 3, 2026, 2:40 a.m.
Added
get_state_requirements
Oct. 3, 2026, 2:40 a.m.
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