Government

Data source: ProPublica Nonprofit Explorer API

MCP MCP Protocol

Endpoint https://context.gnist.ai/mcp/nonprofits/

nobloat — strip report_feedback tool URL-based auth (for clients without header support)

claude_desktop_config.json

{
  "mcpServers": {
    "gnist-nonprofits": {
      "url": "https://context.gnist.ai/mcp/nonprofits/",
      "headers": {
        "Gnist-API-Key": "YOUR_API_KEY"
      }
    }
  }
}

Shell

curl -X POST "https://context.gnist.ai/mcp/nonprofits/" \
  -H "Content-Type: application/json" \
  -H "Accept: application/json, text/event-stream" \
  -H "Gnist-API-Key: YOUR_API_KEY" \
  -d '{"jsonrpc": "2.0", "method": "tools/call", "id": 1, "params": {"name": "search_nonprofits", "arguments": {"query": "example"}}}'

API REST API

API Root https://context.gnist.ai/rest/nonprofits/

3 endpoints available:

GET /rest/nonprofits/search_nonprofits
GET /rest/nonprofits/get_nonprofit
GET /rest/nonprofits/report_feedback

Shell

curl "https://context.gnist.ai/rest/nonprofits/search_nonprofits?query=example" \
  -H "Gnist-API-Key: YOUR_API_KEY"

Python

import httpx

resp = httpx.get(
    "https://context.gnist.ai/rest/nonprofits/search_nonprofits",
    headers={"Gnist-API-Key": "YOUR_API_KEY"},
    params={
        "query": "example"
},
)
print(resp.json())

OpenAPI Spec · Full API Docs

CLI Command Line

Command gc nonprofits

CLI documentation will be available when the GnistAI SDK is published.

Install

pip install gnistai

Available Tools (3)

search_nonprofits

Search 1.6M+ IRS-registered US nonprofit organizations.

Parameter	Type	Required	Description
`query`	`string`	required	Search query — name, city, or keyword. Example: 'red cross'.
`state`	`any`	optional	Two-letter US state code. Example: 'CA'.
`ntee`	`any`	optional	NTEE major group: 1=Arts, 2=Education, 3=Environment, 4=Health, 5=Human Services, 6=International, 7=Public Benefit, 8=Religion, 9=Mutual Benefit, 10=Unknown.
`c_code`	`any`	optional	501(c) subsection code. Use 3 for 501(c)(3) charitable orgs.
`page`	`integer`	optional	Page number (0-indexed, 25 results per page). (default: 0)