Live Projects

Tools I'm building in public.

Working software, not case studies — built end to end and shipped here. Each project starts with a real gap, states plainly what it does and doesn't check, and shows its work.

EIN Due-Diligence Checker

In build · v1

Check any US nonprofit's IRS standing in seconds: 501(c)(3) status, tax-deductibility, revocation history, and filing recency — assembled into a single plain-English trust card with a green / amber / red verdict. Built directly on IRS source data (Business Master File, Publication 78, the auto-revocation list, and the 990 e-file index), never a re-publisher's API.

An answer engine, not a database: verdict in three seconds, evidence expandable on demand, and every field cites its source and "as of" date. What it doesn't check, it says out loud.

IRS source data~2M organizationsDeterministic rulesProvenance per field

Build log

  1. Schema, reference tables, and build rules committed
  2. IRS Business Master File ingested (~2M orgs)
  3. Deductibility + revocation reconciliation, with trap tests
  4. Filing recency (990 e-file index + 990-N)
  5. Name search with match confidence
  6. Trust-card assembly and rules engine
  7. Public checker launches on this page
More tools will land here — this page is the platform, not a one-off. Next up after the checker: state charitable-registration coverage and a verification API.