Note 003 opened with the line that no directory maps Polymarket's third-party ecosystem, and worked from the best substitute: a 35-tool GitHub list. Two weeks on, a directory does exist. PolyMart lists 136 tools across twelve categories, each entry reviewed by hand before it goes live, with a blog of comparisons on top and, unusually, a machine-readable index at polymart.app/llms.txt that lets you pull the whole catalogue as text. Disclosure first: we submitted TickFoundry to it on September 7 (Data & APIs), PolyMart asks listed tools to link back, and this note is that link. No money changed hands; the directory also takes donations to jump its review queue, which we did not use.
The interesting exercise is the same one as last time: read the category counts as a map of where the niche is. Here they are, as published on the home page today (a tool can carry more than one category, so the column sums past 136):
Ninety of the category tags are execution: terminals and bots, most of the bots Telegram copy-traders that mirror a tracked wallet. Add the analytics and alert categories, which are dominated by wallet leaderboards and whale radar, and well over half the directory is downstream of the fact note 003 turned on: on this venue the trader is a public dataset, because settlement is on-chain and every position is visible. A bigger sample did not change the reading. It sharpened it.
Two weeks ago the list had no backtesting entry and two fair-value tools, and we argued the cause was an input: the order book is off-chain, so nobody had price history to model on. PolyMart has seventeen Data & APIs entries, and the notable thing is what they sell. Three of them, PolyOrderBooks, Polybacktest and Marketlens, offer historical order-book data for the crypto up-or-down markets, the fifteen-minute and hourly bitcoin and ether questions that are the venue's highest-turnover series and the natural first target for a retail quant. The input is being filled, at least for that corner.
Where we sit in that row, for the record: TickFoundry records the whole venue rather than the crypto series, every market with a book, at the full 25 levels the feed publishes, tick by tick since May 11, 2026 with book history extended back to February 2026, and keeps the raw websocket frames so the book can be replayed rather than sampled. The vendors above describe snapshot archives of the crypto markets; we have not tested any of them and the glosses are their own listing text. If you are building on those series specifically, it is now worth comparing.
PolyMart's own July round-up of analysis tools makes the same point the categories do: the mature tooling is about who is trading, not what the price should be. The ones we would actually open:
Two maps now exist and they are complementary. The GitHub list is curated toward tools a researcher would use and is where dead projects get pruned; the PolyMart directory is the wider census, four times the entries, with the Telegram bots and prop firms the list leaves out. Before building anything, read both in one sitting. The empty cells are still the same ones: fair value, backtesting against real books, and anything at all for the non-crypto markets, which is most of the venue.