Free Bitcoin Treasuries API
Bitcoin on the balance sheets of US listed companies, from the crypto asset tags in their own 10-Q and 10-K filings, as JSON. One row per company with the newest coin count, the fair value and cost basis filed with it, and the as-of date.
Endpoints
/api/markets/bitcoin-treasuriesEvery covered company, largest count first.
/api/markets/bitcoin-treasuries/csvThe same table as CSV.
Response shape
Every endpoint returns the same JSON envelope: { data, updatedAt, source, docs, license, attribution, meta }. In meta, source names who publishes the data and sourceAttribution is the credit line to show with it. The data field is an array of records with these fields:
| Field | Type | Description |
|---|---|---|
| ticker | string | Listed ticker |
| name | string | Company |
| cik | string | SEC CIK, ten digits |
| asOf | string | null | Balance sheet date of the figures |
| units | number | null | Bitcoin held as tagged in the filing; null when the filing gives no usable count |
| fairValueUsd | number | null | Fair value of crypto assets as filed, USD |
| costUsd | number | null | Cost basis as filed, USD |
| form | string | null | 10-Q or 10-K the figures come from |
| unitsReliable | boolean | true when the filing gives a usable coin count |
| impliedPrice | number | null | fairValueUsd divided by units, the filing's own valuation per coin |
Values are as filed; nothing is estimated between filings. Refreshed weekly from the companies' XBRL filings.
Numeric fields typed string in the table carry exact decimals; parse them with your language's decimal type. No key needed to start: 10 requests a minute per IP without a key and 30 a minute with a free account key, with at least six months of history. A 429 response carries a Retry-After header in seconds. Credit XOOMAR with a link to the dataset page when you republish the data; the data terms are on the terms page.
A free account key raises the limit; send it in an X-API-Key header.
Frequently Asked Questions
Where does the data come from?
What are the rate limits?
Data on this page is provided for informational purposes only and is not financial advice. See our editorial policy.