FirmTapeBrightCode LLC
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Related Products
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About
Blocksize is a crypto market data provider.
Crypto has no consolidated tape and no official closing price. The same asset trades at different levels on every venue at once, and the gaps widen when accuracy matters most. Any single-exchange price is a partial view, which makes it hard to defend in a valuation, a fill review or an audit.
We aggregate pricing in real time from more than 70 exchanges across 9,000+ instruments into one reference price per pair. Outliers are filtered continuously and venues that drift from the market are excluded until they return. The full methodology is published.
We also operate the infrastructure that delivers this data on-chain across the 8 leading oracle networks, so every price we submit must hold against consensus before it is accepted.
Asset managers, funds and family offices use Blocksize for NAV, fair-value marks and reporting. Trading firms and brokers use it as an independent execution benchmark.
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About
FirmTape is a web terminal for traders of S&P 500 index options (SPX). It rebuilds dealer positioning from the options tape every second: the zero-gamma flip, call and put walls, the hold band, an order-flow book signed print by print, the option-implied expected move, and a calendar of market events. The archive of 1,097+ finished sessions is free and needs no account, with second-by-second replay of every session. The built-in Lab tests a rule written in plain language across the whole archive and reports honest statistics, including "no edge". A hosted MCP server makes sessions and levels available inside Claude, ChatGPT and Cursor. The paid tier streams the live intraday feed during the US session. FirmTape publishes measurements of dealer positioning, not trade signals. Methodology and failed studies are documented in the public research section of the site.
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Platforms Supported
Windows
Mac
Linux
Cloud
On-Premises
iPhone
iPad
Android
Chromebook
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Platforms Supported
Windows
Mac
Linux
Cloud
On-Premises
iPhone
iPad
Android
Chromebook
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Audience
Asset managers, crypto funds, family offices, broker, trading firms, oracle networks.
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Audience
SPX and 0DTE options traders, quant researchers, and AI-assistant users who want dealer-positioning data
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Support
Phone Support
24/7 Live Support
Online
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Support
Phone Support
24/7 Live Support
Online
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API
Offers API
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API
Offers API
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Screenshots and VideosNo images available
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Screenshots and VideosNo images available
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Pricing
$49/month
Free Version
Free Trial
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Pricing
$29/month
Free Version
Free Trial
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Reviews/
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Reviews/
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Training
Documentation
Webinars
Live Online
In Person
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Training
Documentation
Webinars
Live Online
In Person
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Company InformationBlocksize
Founded: 2018
Germany
blocksize.info
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Company InformationBrightCode LLC
Founded: 2026
United States
firmtape.com
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Integrations
No info available.
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Integrations
No info available.
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