INDIVIDUAL MCP TOOL

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.

501c3.helpnone authenticationAvailability not checked

LIVE ENDPOINT

https://mcp.501c3.help

No auth detected

Connect to this endpoint to inspect the live schema for get_filing_deadlines and invoke it with your own arguments.

Indexed input schema

{}

Risk classification

Inferred read-only · medium confidence · heuristic, not a guarantee.

No write-capable action terms were found; this is not proof that invocation has no side effects.

Parent server

501c3.help

CONNECT WITH APPROVAL

Client installation

Review this server and its permissions before adding it. Secret placeholders must be set locally.

Codex

~/.codex/config.toml

[mcp_servers.501c3help-compliance]
url = "https://mcp.501c3.help"
enabled = true

Claude Code

.mcp.json

{
  "mcpServers": {
    "501c3help-compliance": {
      "type": "http",
      "url": "https://mcp.501c3.help"
    }
  }
}

Claude Desktop

Settings → Connectors → Add custom connector

Name: 501c3help-compliance
Remote MCP URL: https://mcp.501c3.help

Add this remote URL as a custom connector in Claude Desktop. Availability depends on the user plan and workspace policy.

Cursor

.cursor/mcp.json

{
  "mcpServers": {
    "501c3help-compliance": {
      "url": "https://mcp.501c3.help"
    }
  }
}

Visual Studio Code

.vscode/mcp.json

Add to Visual Studio Code

{
  "servers": {
    "501c3help-compliance": {
      "type": "http",
      "url": "https://mcp.501c3.help"
    }
  }
}

Generic MCP

Client-specific MCP configuration

{
  "name": "501c3help-compliance",
  "transport": "streamable-http",
  "url": "https://mcp.501c3.help"
}

MCP Inspector

Run the official MCP Inspector locally and enter the indexed Streamable HTTP endpoint.

Related tools

get_state_requirements — Nonprofit compliance requirements for one US state, from 501c3.
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.