Documentation
NEXUS Documentation
The standard, the protocols and the calculation rules to design, validate, verify and certify a water impact, rule by rule.The standard, the protocols and the calculation rules, rule by rule.
Project developers start with the certification guide. Buyers, verifiers and funders: contact us for registry access.
The certification journey
Six guides, from project creation to certificate retirement.
Create a project
Choose the applicable protocol and submit the project design document (PDD).
Validate the design
Pre-check by the NEXUS agent, then validation by the verifier.
Build the calculation
Fill the protocol's master equation with the impact modules.
Prove the data
Link each parameter to its evidence tier, from T1 to T4.
Verify and issue
The accredited verifier signs; certificates are recorded in the registry.
Transfer and retire
Follow the seven states of a certificate, up to retirement for a beneficiary.
The methodological corpus
Every rule has an identifier, a frozen version and an address. Cite it, link it, find it.
For machines
The corpus can also be read by software: structured files, AI export, integrations.
Ask the corpus
The assistant answers from the corpus only and cites every rule it uses. It never invents a rule.
No. Water stress and quality criticality are never terms of the equation. The stress tier (T1–T5) is used for eligibility and disclosure, with no effect on the certified volume.
NEXUS corpus v1.0 · updated 08/10/2026