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Northstar Toolkit is the nonprofit data platform — every US nonprofit and foundation from IRS 990 filings, as free search, a developer API, and an MCP server for AI agents. The 990 base layer is free, and stays free.
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The nonprofit data API

Free 990 data for everyone.

Every US nonprofit and foundation — modeled line-item financials, executive compensation, and grants — as searchable pages, a clean JSON API, and an MCP server you can point Claude at. The 990 base layer is free, and stays free.

Get an API keyPoint Claude at it

Search every US nonprofit

Try a mission area ("food bank"), a name ("Feeding America"), or an EIN.

The full 990, as clean JSON

Not summary fields with a link to the PDF. The modeled filing: revenue and expense line items, balance sheets, program accomplishments, Schedule J compensation rows, and complete 990-PF grant lists — normalized across form types and years.

  • Financial time series across every available filing year
  • Query primitives nobody self-serves: filter by revenue, program-expense ratio, compensation, NTEE, geography
  • Per-record provenance — every record shows its filing year and source
  • Commercial use on the Builder tier — a fraction of the enterprise directories
Read the docs →
GET api.northstartoolkit.com/v1/organizations/86-0481941
{
  "name": "Make-A-Wish Foundation of America",
  "ein": "86-0481941",
  "ntee": "E86: Patient & Family Support",
  "latest_filing": {
    "tax_year": 2023,
    "form_type": "990",
    "total_revenue": 429815631,
    "total_expenses": 393312262,
    "employees": 646,
    "source": { "type": "irs_990", "ingested_at": "…" }
  },
  "filings_available": [2018, 2019, 2020, 2021, 2022, 2023]
}
Claude, connected to the 990 warehouse
What does the Gates Foundation pay its executives, and how has its giving changed since 2019?
Looking at the 990-PF filings… total giving grew from $5.1B (2019) to $7.7B (2023). The highest-compensated officer in the latest filing is the CEO at $1.2M…

Point Claude at every 990 ever filed

The free MCP server connects Claude, Claude Code, Cursor, or any agent to the full warehouse. Paste one URL — no key required to start. Ask about any nonprofit's finances, salaries, grants, or peers in plain English.

Connect in 2 minutes

What's in the warehouse

IRS 990, 990-EZ, 990-PF, and 990-N filings, modeled into one consistent schema.

Organization profiles

Identity, mission, NTEE classification, and filing history for every US tax-exempt org.

Line-item financials

Revenue, expenses, balance sheets, and program spending — per filing, across years.

Executive compensation

Officer, director, and key-employee pay from Part VII and Schedule J.

Foundation grants

Complete 990-PF and Schedule I grant lists: recipient, amount, purpose, year.

Semantic search

Embedding-backed search over missions and program text, not just names.

Derived intelligence

Peer sets, benchmarks, and the activity/relationship graph — the layer nobody else models.

Building a product?

CRM enrichment, org verification, comp benchmarking — the data behind your nonprofit features, self-serve and commercially licensed.

Start with the API →

Researching nonprofits?

Answer any client question about any nonprofit in minutes — search the site, or point Claude at the MCP server.

Search for free →

Raising money?

Free funder search with complete 990-PF grant histories, plus AI matching against your mission with a free account.

Find funders →

Free to start. Cheap to scale.

The 990 base layer is free — generous limits, no credit card. Commercial use starts at $49/month.

Free
$0

Search, org pages, MCP, and a generous API tier.

Builder
$49/mo

Commercial use, 10× the quota, batch lookups, email support.

Beyond
Talk to us

Higher volumes and custom needs, case by case.

See pricing

The data is public. Now it's usable.

Search it, query it, or hand it to an agent — free.

Search nonprofitsRead the docs