Glossary
undocumented JSON endpoint
undocumented JSON endpoint is machine-readable JSON URL that a price site uses internally without documenting or licensing it for reuse; Yahoo Finance gold futures records "undocumented, unsupported chart API; the v7 quote API already returns 401". In Datadory's catalog of 1,744 datasets, Yahoo Finance gold futures and MetalsDaily gold price data are working examples.
What is undocumented JSON endpoint?
A machine-readable JSON URL that a price site uses internally without documenting or licensing it for reuse.
Yahoo's chart endpoint is explicitly unsupported and its v7 quote API already requires authentication, and MetalsDaily's pd.ashx endpoint is private.
In this catalog it appears concretely: - Yahoo Finance gold futures — "undocumented, unsupported chart API; the v7 quote API already returns 401". - MetalsDaily gold price data — "JSON delivered via a private pd.ashx endpoint". - SilverPrice.org spot silver prices — "JSON served from the GoldPrice.org data backend". - Nasdaq Market Activity - Weyerhaeuser (WY) - (terms of use) — "No integration key is issued for api.nasdaq.com; access is undocumented and unsupported".
Why does undocumented JSON endpoint matter when choosing a dataset?
Access method sets your maintenance bill. Delivery routes change, layouts drift and scrapers rot quietly; whoever operates your pipeline inherits all of it, which is why access should be priced alongside the license itself.
The failure mode is concrete: a source can carry the undocumented JSON endpoint label while differing from what you need on exactly the dimension that matters — undocumented, unsupported chart API; the v7 quote API already returns 401. Comparing two sources on that line usually settles the choice faster than any feature matrix.
You rarely have to take a vendor's word for it. 82.4% of the 1,744 datasets Datadory catalogs are free to access, and Yahoo Finance gold futures lets you inspect the real artifact before any budget is committed.
How do you evaluate undocumented JSON endpoint in a data source?
Treat every claim of this attribute as testable:
- Open Yahoo Finance gold futures and confirm its record — "undocumented, unsupported chart API; the v7 quote API already returns 401" — against the files you actually receive. 2. Open MetalsDaily gold price data and confirm its record — "JSON delivered via a private pd.ashx endpoint" — against the files you actually receive. 3. Open SilverPrice.org spot silver prices and confirm its record — "JSON served from the GoldPrice.org data backend" — against the files you actually receive. 4. Pin down update cadence in writing.
Related terms
Adjacent concepts worth reading next: - automated capture prohibition - benchmark data licence - daily ohlcv - json ld dataset markup - keyless API access - OHLC price history
Frequently asked questions
What is an example of undocumented JSON endpoint?
Yahoo Finance gold futures is the clearest example in this catalog. Its record states: "undocumented, unsupported chart API; the v7 quote API already returns 401". Across all 1,744 datasets Datadory averages a quality score of 7.81 out of 10, so a named example can be weighed rather than trusted blindly.
Is data described as "undocumented JSON endpoint" free to use?
Treat access and permission separately. 82.4% of the 1,744 datasets in this catalog are free to access, but 235 are freemium and 61 are paid outright, so confirm both the price and the license on the exact distribution before building on it.
How do I verify a source really provides undocumented JSON endpoint?
Open Yahoo Finance gold futures next to MetalsDaily gold price data and compare the promise with the download. Field definitions are verified for 1495 of 1,744 datasets (85.7%), which makes that check fast inside the catalog and manual outside it.
Datasets containing this field
Datasets containing undocumented JSON endpoint
6 datasets carry undocumented json endpoint in the catalog. Open one, count the fields, judge for yourself.
BGS MineralsUK: UK and World Mineral Statistics
synthetic_id · year · yearbook_table_id …+13 more
BullionStar Gold Price and Historical Data: Singapore Bullion Exchange Prices
fromIndex · toIndex · dataSeries …+9 more
Indian Bureau of Mines statistics: Indian Minerals Yearbook & mineral production
State/District · Ore Produced · Avg. Grade (gram/tonne) …+6 more
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