501c3.HELP nonprofit compliance MCP Server

by 501c3 Your server? Claim it

answering

501c3.HELP nonprofit compliance is answering right now. Last checked 14 min ago. It exposes 3 tools.

Nonprofit compliance rules for all 50 US states, each with its official citation and status

Uptime history 10 days of history · worst day 99%

10 days agonow

100.0%

Uptime 24h

91 of 91 checks

Tools

read from the server

88 ms

Response time

average over 24h

open, no key

Access

streamable-http

501c3.HELP nonprofit compliance missed one check this week

Everything else answered, so this is steady rather than shaky. We check every 15 minutes, which is how a one-off gets told apart from the start of a pattern, and how you hear about the next one within the hour instead of from your users.

Connect this server

Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 14 min ago.

Claude Code Claude Desktop Codex Cursor VS Code

run in your terminal

claude mcp add compliance --transport http https://mcp.501c3.help/

~/Library/Application Support/Claude/claude_desktop_config.json

{
  "mcpServers": {
    "compliance": {
      "url": "https://mcp.501c3.help/"
    }
  }
}

~/.codex/config.toml

[mcp_servers.compliance]
url = "https://mcp.501c3.help/"

.cursor/mcp.json

{
  "mcpServers": {
    "compliance": {
      "url": "https://mcp.501c3.help/"
    }
  }
}

.vscode/mcp.json

{
  "mcpServers": {
    "compliance": {
      "url": "https://mcp.501c3.help/"
    }
  }
}

Available tools 3

Read directly from the server with tools/list, grouped by what they act on. If a tool disappears, we record the date.

compare

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.

filing

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.

state

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.

Endpoints

URL	Transport	State	Latency	Checked
https://mcp.501c3.help/	streamable-http	answering	125 ms	14 min ago

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501c3.HELP nonprofit compliance — questions

Answers built from our own checks of this server.

What can 501c3.HELP nonprofit compliance do?

It exposes 3 tools, read directly from the server on our last check. Among them: compare_states, get_filing_deadlines, get_state_requirements. The full list with descriptions is on this page — we take it from the server itself via tools/list, not from a README. How MCP servers expose tools in the first place →

Is 501c3.HELP nonprofit compliance working right now?

We send a real MCP handshake every 15 minutes. Over the last 24 hours 91 of 91 checks got a reply (100.0%), average response time 88 ms. The bar chart above shows every period we have measured.

How do I connect 501c3.HELP nonprofit compliance?

Copy the ready config from this page — we generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each with the file path that client actually reads. It is a remote server, so there is nothing to install — the client connects to the address.

Does 501c3.HELP nonprofit compliance need an API key?

No. 501c3.HELP nonprofit compliance completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 3 of them are readable on this page. This is what we observed, not what the docs claim.

How fast is 501c3.HELP nonprofit compliance?

It answers our handshake in 88 ms on average, which is faster than 88% of all working MCP servers we measure. That puts it in the quick quarter of the ecosystem. The comparison comes from our own checks across the whole registry, every 15 minutes.