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Hydromancer provides low-latency Hyperliquid APIs, streaming infrastructure, historical datasets, and orderbook data for ambitious builders and traders.

Which is more popular?
Website, pricing, platforms and company facts side by side.
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|---|---|---|
| Website | onenote.com | hydromancer.xyz |
| Pricing | — | |
| Company | Startup from the United States | Startup from The Netherlands · 1 - 9 employees · 2024 |
| Listed in |
In their own words, as submitted to SaaSHub.


No description of OneNote yet.
Hydromancer is data infrastructure built specifically for Hyperliquid. It provides REST APIs, real-time WebSocket streams, granular orderbook data and historical datasets for building applications, monitoring markets and running research. App developers use Hydromancer to build trading...
What each product offers, as listed by its team.


Possible disadvantages
An editorial look at what each product does well and who it suits.


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Recommended for
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As answered by people managing OneNote and Hydromancer.
Hydromancer's answer:
Hydromancer is a Hyperliquid-only data layer, not an RPC provider. It extends the native API with builder endpoints and batch reads for 1,000+ wallets, and streams the L4 orderbook with maker addresses. The feed is peered to a Foundation node and Hydromancer's own active-set validator, so teams do not have to run that infrastructure themselves.
Hydromancer's answer:
The public Hyperliquid API is free, but it rate-limits heavy reads and does not offer these batch or builder endpoints. RPC providers solve node access, not this data layer. Hydromancer is for teams that already have trading access and need faster reads, order-book streaming, and historical data without running their own nodes.
Hydromancer's answer:
Hyperliquid builders. That includes trading apps, portfolio and analytics products, HIP-3 and HIP-4 market deployers, and market makers who need low-latency order-book data.
Hydromancer's answer:
The team built Hyperdash, a Hyperliquid app later acquired by pvp.trade, and kept hitting the limits of the public API. Hydromancer is the data infrastructure they wanted as builders. It has been Hyperliquid-only since 2024, shaped by teams using it in production. Reservoir, the free historical dataset, is the public-good side of that work.
Hydromancer's answer:
A JSON REST API on the same POST /info shape as Hyperliquid, plus WebSocket streaming and a Python SDK. Under that, Hydromancer runs its own Hyperliquid nodes and an active-set validator, peered in AWS Tokyo. Historical data is stored as Parquet on S3. The site does not publish the application languages, so I would not name those here.
Hydromancer's answer:
These are teams named on the site and in the docs, not a ranking by revenue.
tread.fi, HyENA, Liquid, SEDA, Based, Outcome, Native Markets, Senpi & fomo
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External articles and on-site reviews we used to compare the two products.


For me it is a convenient and compact tool in which I can put all my ideas, goals, thoughts
Microsoft OneNote is free to use. As long as you have a Microsoft account, you can use Microsoft OneNote.
OneNote is a free note-taking app available to anyone with a Microsoft account. Although handy, OneNote has a laid-back interface and is not as intuitive. However, OneNote has several note-worthy features, including...
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