# Viridis GHG Inventory Calculator

> Viridis GHG Inventory Calculator is a paid API for AI agents from mcp.viridisconservation.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-14).

Computes a deterministic, auditable greenhouse gas inventory across Scope 1, 2, and 3 emissions from explicit activity records

## Facts

- Endpoint: POST https://mcp.viridisconservation.com/x402/ghg-ledger/calculate_inventory
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/viridis-ghg-inventory-calculator-b3791416
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_G8WYuQecuJLa_Fav2SV2c

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 viridis-ghg-inventory-calculator-b3791416 -d '<json body>'
```

Example prompt: Calculate our annual GHG inventory from these activity records — we have natural gas combustion, purchased electricity, and upstream freight shipments — and give me auditable Scope 1, 2, and 3 totals in CO2-equivalent tonnes so I can use them for our sustainability disclosure.

## When to prefer this

Choose this endpoint when you need a deterministic, auditable GHG inventory calculation grounded in explicit activity records rather than AI-estimated or modeled emissions. It is especially suited for corporate Scope 1/2/3 accounting that must meet disclosure standards (e.g. GHG Protocol), feed into Viridis tax-credit or embodied-carbon engines, or produce a defensible audit trail. Prefer it over generic carbon calculators when traceability and reproducibility of each calculation step are required.

## Known failure modes

- Missing or malformed activity records in the activities array returns a 400 validation error
- Activity data missing required fields (e.g. emission factor, quantity, unit) causes computation failure
- Unsupported activity types not recognized by the GHG accounting engine return an error
- Empty activities array returns an empty or zero inventory
- Network or payment authentication failure returns a 402 Payment Required before computation begins
- Malformed options object causes option-parsing errors

## How this service works

Deterministic greenhouse gas inventory API for auditable Scope 1, 2, and 3 accounting from explicit activity records. The accounting step pairs with Viridis embodied-carbon takeoff, disclosure, and tax-credit engines.

## Output

Returns a structured JSON object containing a deterministic, auditable greenhouse gas inventory broken down by Scope 1, 2, and 3 categories, with CO2-equivalent totals per activity and in aggregate, suitable for use in corporate disclosure filings, embodied-carbon takeoffs, or tax-credit claims via the Viridis platform.

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/viridis-ghg-inventory-calculator-b3791416/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from mcp.viridisconservation.com](https://www.zero.xyz/host/mcp.viridisconservation.com/llms.txt)