# Atmospheric CO2 Concentration (Mauna Loa / NOAA)

> Atmospheric CO2 Concentration (Mauna Loa / NOAA) is a paid API for AI agents from api.vextorium.com, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-15).

Returns the latest monthly atmospheric CO2 concentration in ppm from the NOAA Mauna Loa observatory, along with annual change, 10-year comparison, first recorded value (1958), and a recent monthly series.

## Facts

- Endpoint: POST https://api.vextorium.com/v1/atmospheric-co2?utm_source=zero.xyz
- Price: $0.002/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/atmospheric-co2-concentration-mauna-loa-noaa-adea44ee
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_BBSYqgJI2LCP9GJ2zjkBb

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability atmospheric-co2-concentration-mauna-loa-noaa-adea44ee -d '<json body>'
```

Example prompt: What's the latest atmospheric CO2 reading from Mauna Loa? Give me the current ppm, how much it's changed since last year, how it compares to 10 years ago, and show me the last 6 months of data.

## When to prefer this

Choose this endpoint when you need authoritative, real-time atmospheric CO2 data sourced directly from NOAA's Mauna Loa observatory — the gold standard for global CO2 monitoring. It is especially useful when you need historical context (1958 baseline, 10-year comparison, annual change) alongside the latest reading in a single call, without having to query NOAA's raw APIs directly.

## Known failure modes

- NOAA data may be temporarily unavailable or delayed, resulting in null values in the response
- Requesting more months than available in the series may return a shorter array than requested
- If the 'months' parameter is omitted, a default series length is returned which may not match the caller's expectation
- Network timeout or payment verification failure may result in a non-200 response

## How this service works

Atmospheric CO2 concentration measured by NOAA at Mauna Loa: latest monthly ppm, yearly change, comparison with 10 years ago and with NOAA's first record (May 1974), and the recent series. U.S. Government data.

## Output

A JSON object containing: the latest monthly CO2 reading (ppm, period, seasonally adjusted ppm), the annual change in ppm, the CO2 value from 10 years ago, the first recorded value (March 1958, 315.71 ppm), a recent monthly series array (each with ppm and period), and the NOAA data source attribution.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "months": {
   "type": "integer"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "last": {
   "ppm": 427.55,
   "period": "2026-08",
   "seasonally_adjusted_ppm": 429.51
  },
  "series": [
   {
    "ppm": 431.43,
    "period": "2026-06"
   },
   {
    "ppm": 429.13,
    "period": "2026-07"
   }
  ],
  "source": "NOAA Global Monitoring Laboratory, Mauna Loa (public domain)",
  "first_record": {
   "ppm": 315.71,
   "period": "1958-03"
  },
  "10_years_ago_ppm": 402.45,
  "annual_change_ppm": 2.07
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/atmospheric-co2-concentration-mauna-loa-noaa-adea44ee/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.vextorium.com](https://www.zero.xyz/host/api.vextorium.com/llms.txt)