MCP server

501c3.HELP nonprofit compliance Official

help.501c3/compliance

Checked 26 Oct 2026, 08:29 UTC · Connected to it and listed its tools

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

Working at last checkVerified publisher: 501c3.helpAbout 569 tokens per request once connected3 tools

https://mcp.501c3.help/

At a glance

Type: MCP server
Publisher: 501c3.help (verified by the MCP Registry)
Status: Working at last check
Tools: 3
Token cost: About 569 tokens per request
Sets up in: Claude Code, Claude Desktop, Codex, Gemini CLI, Cursor, VS Code, Antigravity, ChatGPT, OpenAI API, Grok
Last checked: 26 Oct 2026, 08:29 UTC

Opens the app, which shows the server and asks you to confirm. For other apps, copy the setup below.

Claude Code

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

Claude Desktop

Settings → Connectors → Add custom connector, and paste the URL.

Codex (config.toml)

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

Gemini CLI

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

Cursor

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

VS Code

{"servers":{"compliance":{"type":"http","url":"https://mcp.501c3.help/"}}}

Antigravity

agy mcp add compliance https://mcp.501c3.help/

ChatGPT

Settings → Apps & Connectors → Advanced settings: turn on Developer mode, then Create a connector and paste the URL. Which plans can do this varies.

OpenAI API (Responses tools)

{"type":"mcp","server_label":"compliance","server_url":"https://mcp.501c3.help/","require_approval":"always"}

Grok (xAI API tools)

{"type":"mcp","server_label":"compliance","server_url":"https://mcp.501c3.help/"}

compare_states ~201 tokens
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 settle
get_filing_deadlines ~140 tokens
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.
get_state_requirements ~228 tokens
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 mu

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