Vellium & Co

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Vextorium

Atmospheric CO2 concentration measured at Mauna Loa (NOAA): latest monthly ppm, yearly change, comparison with 10 years ago and with 1958, and the recent series.

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Our latest check (2026-10-11)

Answering
Yes — valid x402 payment terms
Time to answer
93 ms
Price
$0.002 per call
Paying buyers, last 30 days
3 (directory's own records)
Paid calls, last 30 days
3
Category
Unclassified
Address
https://api.vextorium.com/v1/atmospheric-co2

Accuracy: paid answers checked against an independent record

Not yet in our paid checks. A seller we have not checked has neither passed nor failed.

For agents

This page as JSON: /sellers/1150f8c1ddb9.json. Paid lookup by address: GET /api/seller?resource=… ($0.001, x402).

Sellers can see the evidence behind their checks and ask for a re-check at [email protected].