@pipeworx/fjc-judges

Connect: https://pipeworx.io/mcp — every tool in the catalog, including @pipeworx/fjc-judges’s. Install: one-click buttons

No MCP client? Skip the connection: POST https://gateway.pipeworx.io/v1/tools/search_packs {"query":"..."} to find a tool below, GET /v1/tools/<name> for its schema, POST the same URL with arguments for the data — see For AI agents.

Tools: 4

Biographies and appointment records of every US federal (Article III) judge since 1789 — Supreme Court justices, court of appeals and district court judges — from the Federal Judicial Center’s Biographical Directory.

Tools

• fjc_judge_lookup(name) — one judge’s full record: every appointment with court, title, appointing president and party, ABA rating, nomination / hearing / confirmation / commission dates, Senate vote, chief-judge and senior-status dates and how service ended; plus birth, death, education and career. Answers “who appointed Judge X”, “when was X confirmed”, “is X still serving”.
• fjc_judges_by_court(court, status?) — judges of one court (e.g. “Ninth Circuit”, “Southern District of New York”, “Supreme Court”). status is active (default — active service only), serving (active or senior) or all.
• fjc_judges_by_president(president, court_type?) — every Article III appointment a president made, with totals by court level. Joseph R. Biden: 235 appointments of 230 distinct judges (one judge can be appointed twice, e.g. Ketanji Brown Jackson to the D.C. Circuit and then the Supreme Court).
• fjc_seat_succession(name | seat_id, court?) — the chain of holders of one judgeship in order, with the named predecessor and successor of the judge asked about (“who did Judge X replace”). Built from the directory’s Seat ID, whose last two digits are the holder’s sequence on that seat.

Every response carries source, licence and data_as_of (when the FJC last regenerated the directory).

Auth

Keyless.

Data sources

• Federal Judicial Center, Biographical Directory of Article III Federal Judges, 1789–present. Public domain (a work of the US federal government).

The FJC publishes the directory as a single export (~5 MB, ~4,000 judges, regenerated daily), not as a query API. The pack reads it per isolate and keeps the parsed rows for up to six hours, so the first call on a cold isolate takes about a second and the rest take milliseconds.

Things the next person would otherwise rediscover:

• One row per judge, with up to six appointments flattened into numbered columns (Court Name (1) … (6)). A judge elevated from district court to a circuit has two appointments; counts “by president” are appointments, and the response reports distinct judges alongside.
• Empty cells are frequently a single space, not empty — trim before testing.
• “Active” means no termination date and no senior-status date on that appointment. Senior judges still hear cases; use status: "serving" to include them.
• Presidents are written as the FJC writes them (“George H.W. Bush”, “Joseph R. Biden”). A surname that matches two presidents returns ambiguous_president with both candidates rather than merging them.
• Magistrate, bankruptcy and state judges are not Article III judges and are not in this directory.

Tools

• fjc_judge_lookup — Look up a US federal (Article III) judge by name in the Federal Judicial Center biographical directory — every Supreme Court justice, court of appeals and district court judge since 1789. Returns each
• fjc_judges_by_court — List US federal judges who sat on a given federal court — e.g. the Supreme Court, the Ninth Circuit, the Southern District of New York — from the Federal Judicial Center directory. Filter to judges cu
• fjc_judges_by_president — List the Article III federal judges appointed by a US president, from the Federal Judicial Center directory, with counts by court level (Supreme Court, courts of appeals, district courts). Returns eac
• fjc_seat_succession — Trace who held a US federal judgeship (Article III seat) before and after a judge, from the Federal Judicial Center biographical directory. Give a judge name (or an FJC Seat ID) and get the whole chai