501c3.HELP nonprofit compliance
Nonprofit compliance rules for all 50 US states, each with its official citation and status
Should I use this
Quality & Safety
Based on automated analysis of tool definitions and protocol compliance.
Context Cost
This is the approximate number of tokens consumed each time the server's tools are loaded into a model's context. Higher counts reduce the attention available for other tasks.
Install
One-Click Install
Add this to your `claude_desktop_config.json` file:
{
"mcpServers": {
"compliance": {
"url": "https://mcp.501c3.help/"
}
}
}Remote endpoints
https://mcp.501c3.help/streamable-httpWhat it can do
Tool inventory
Tools (3)
🟢get_state_requirements(state, topic)
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",
"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'."
}
},
"required": [
"state"
]
}⚪compare_states(states, topic)
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",
"properties": {
"states": {
"type": "array",
"items": {
"type": "string"
},
"description": "State names or two-letter abbreviations. Up to eight."
},
"topic": {
"type": "string",
"description": "The topic to compare, for example 'solicitation', 'reporting', 'formation', 'tax'."
}
},
"required": [
"states",
"topic"
]
}🟢get_filing_deadlines(state)
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",
"properties": {
"state": {
"type": "string",
"description": "State name or two-letter abbreviation."
}
},
"required": [
"state"
]
}Community
Evidence