Nonprofit compliance rules for all 50 US states, each with its official citation and status
Connect Remote server
claude mcp add --transport http compliance https://mcp.501c3.help/
{
"mcpServers": {
"compliance": {
"url": "https://mcp.501c3.help/"
}
}
}
{
"servers": {
"compliance": {
"type": "http",
"url": "https://mcp.501c3.help/"
}
}
}
Settings > Connectors > Add custom connector
URL: https://mcp.501c3.help/
Tools 3 found in our last check
get_state_requirementsNonprofit 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_statesThe 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…
get_filing_deadlinesEvery 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…
Details
| Endpoint | https://mcp.501c3.help/ (Streamable HTTP) |
| First published | 1 Oct 2026 |
| Last updated | 1 Oct 2026 |
| Registry name | help.501c3/compliance |
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