US Nonprofit & Charity Check MCP

Check any US charity or nonprofit by name or EIN. Free nonprofit_check tool.

Should I use this

Quality & Safety

A
Description quality
100%
Schema completeness
85%
Naming quality
80%
Poisoning risk
100%
Permission match
100%
Protocol compliance
100%

Based on automated analysis of tool definitions and protocol compliance.

Context Cost

~263Tokens (tool definitions)
~526 BTypical response size
Minimal attention impact (0.21% of 128k context)

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": {
    "us-nonprofit-check-mcp": {
      "url": "https://us-nonprofit-check-mcp.donniertf.workers.dev/mcp"
    }
  }
}

Remote endpoints

https://us-nonprofit-check-mcp.donniertf.workers.dev/mcpstreamable-http

What it can do

Tool inventory

Tools (3)

🟢 Read-only🟡 Write🔴 Delete⚪ Unknown
🟢nonprofit_check(name, state)

FREE. Find a US nonprofit/charity by name or EIN — top 3 with city, state and 501(c) type.

Input Schema

{
  "type": "object",
  "properties": {
    "name": {
      "type": "string"
    },
    "state": {
      "type": "string"
    }
  },
  "required": [
    "name"
  ]
}
⚪financials(ein, access_token)

PRO. Form 990 financial history for an EIN: revenue, expenses, assets, liabilities, officer compensation, program/overhead ratio by year.

Input Schema

{
  "type": "object",
  "properties": {
    "ein": {
      "type": "string"
    },
    "access_token": {
      "type": "string",
      "description": "Subscriber token from /success (or Authorization: Bearer)"
    }
  },
  "required": [
    "ein"
  ]
}
🟢prospect_list(keyword, state, page, access_token)

PRO. Nonprofits matching a keyword in a state (e.g. 'food bank', 'hospital', 'school') — for fundraising consultants, SaaS and grant writers.

Input Schema

{
  "type": "object",
  "properties": {
    "keyword": {
      "type": "string"
    },
    "state": {
      "type": "string"
    },
    "page": {
      "type": "number"
    },
    "access_token": {
      "type": "string",
      "description": "Subscriber token from /success (or Authorization: Bearer)"
    }
  },
  "required": [
    "keyword"
  ]
}

Community

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Evidence

Recent observations

verifiedversion not recorded3 tools