@pipeworx/fca-shorts

Connect: https://gateway.pipeworx.io/fca-shorts/mcp · 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: 3

UK Financial Conduct Authority daily disclosed net short positions (fca.org.uk) — aggregated and anonymised per issuer under the UK Short Selling Regulations 2025, plus per-issuer position deltas against the historic disclosure file.

Tools

• fca_short_positions(issuer?, isin?) — the current FCA-disclosed net short position(s) for an issuer, filtered by name substring and/or exact ISIN. Requires at least one of issuer or isin.
• fca_largest_shorts(top_n?) — the N issuers with the largest currently disclosed net short positions market-wide, sorted descending. Default 20.
• fca_short_changes(issuer?, isin?, since?, top_n?) — per-issuer position deltas: the latest current position against the most recent prior value the historic file shows for the same ISIN. Filter to one issuer/ISIN, or omit both to get the largest market-wide moves (optionally only since a given ISO date).

Auth

Keyless. Both source files (current + historic) are small public CSVs fetched live on every call — no auth wall.

Data sources

• https://www.fca.org.uk/publication/documents/aggregated-current-net-short-positions.csv — current disclosed positions, one row per issuer (~422 rows as of 2026-09-23).
• https://www.fca.org.uk/publication/documents/aggregated-historic-net-short-positions.csv — the transition ledger: every value a current position superseded (~6,016 rows as of 2026-09-23).
• https://www.fca.org.uk/markets/short-selling/notification-disclosure-net-short-positions — the human-readable page these files are published from.

The data is aggregated and anonymised PER ISSUER, not per holder. Under the current UK Short Selling Regulations 2025 regime, individual position holders are disclosed to the FCA privately but never published — every row here is one issuer’s total disclosed net short position (sum of everything ≥0.2% of issued share capital). This is a real regime detail worth getting right: older write-ups of the EU-era rules describe a public/private two-tier holder disclosure model that no longer applies to what these files actually contain. Verified live 2026-09-23 by downloading both files directly rather than assumed from documentation.

Complementary to finra (US Reg SHO daily short-sale volume + consolidated bi-monthly short interest, holder-anonymous, US-listed equities): use finra for US tickers, fca-shorts for UK/LSE issuers — a different shape of disclosure (position-level, not volume) entirely.

A longer-retention history ledger (daily snapshots, so “which increased this week” survives the FCA pruning its own historic file) was built but NOT shipped: the live files answer every tool today and nothing would fill the table. The migration and refresh script are in git history at commit e4d2fb0f8 (supabase/migrations/209_fca_short_position_snapshots.sql, scripts/refresh-fca-shorts.mjs); restore them if the historic file starts losing rows or callers ask for trends older than it holds. FCA’s Data section is UK Open Government Licence v3.0 (fca.org.uk/legal), which permits that copy with attribution.

Tools

• fca_short_positions — Current FCA-disclosed net short position(s) for an issuer, from the daily “aggregated-current-net-short-positions” file (fca.org.uk). Data is AGGREGATED AND ANONYMISED PER ISSUER under the UK Short Se
• fca_largest_shorts — The N issuers with the largest currently FCA-disclosed net short positions market-wide, sorted descending by aggregated position %. Reads the same daily “aggregated-current-net-short-positions” file a
• fca_short_changes — Per-issuer short-position deltas: compares each issuer’s latest CURRENT disclosed position against the most recent prior value shown for that ISIN in the HISTORIC disclosures file, i.e. what moved and