# NAR Registry Client API

**Canonical:** https://apis.io/apis/xpansiv/xpansiv-nar-registry/  
**Provider:** Xpansiv — https://apis.io/providers/xpansiv/  
**Base URL:** https://narenewables2.apx.com/ClientAPI  
**Documentation:** https://developer.xpansiv.com/developer-portal/nar-registry

NAR Registry Client API is one of 8 APIs that [Xpansiv](https://apis.io/providers/xpansiv/) publishes on the [APIs.io](https://apis.io/) network, described by a machine-readable OpenAPI specification. Tagged areas include Registries and Renewable Energy Certificates. The published artifact set on APIs.io includes an OpenAPI specification, API documentation, and authentication docs.

The North American Renewables Registry client API for retrieving and transacting NAR monthly vintage renewable energy certificates — account, ledger, subaccount and system operations behind an OAuth2 password-grant JWT.

## Machine-readable artifacts (4)

- **OpenAPI** — https://raw.githubusercontent.com/api-evangelist/xpansiv/refs/heads/main/openapi/xpansiv-nar-registry-client-openapi.yml
- **Documentation** — https://developer.xpansiv.com/developer-portal/nar-registry
- **Authentication** — https://developer.xpansiv.com/developer-portal/nar-registry/authentication
- **Overlay** — https://raw.githubusercontent.com/api-evangelist/xpansiv/refs/heads/main/overlays/xpansiv-nar-registry-client-overlay.yaml

## Other Xpansiv APIs (7)

- [Xpansiv Connect API](https://apis.io/apis/xpansiv/xpansiv-connect/)
- [Xpansiv Managed Solutions API](https://apis.io/apis/xpansiv/xpansiv-managed-solutions/)
- [Xpansiv Data API](https://apis.io/apis/xpansiv/xpansiv-data/)
- [TIGRS Registry Client API](https://apis.io/apis/xpansiv/xpansiv-tigr-registry/)
- [Xpansiv Optimal Outcomes APIs](https://apis.io/apis/xpansiv/xpansiv-optimal-outcomes/)
- [APX Power Markets File Registry API](https://apis.io/apis/xpansiv/xpansiv-apx-power-markets/)
- [Xpansiv Marketplace FIX API](https://apis.io/apis/xpansiv/xpansiv-marketplace-fix/)

## Tags

Registries, Renewable Energy Certificates

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/apis/xpansiv/xpansiv-nar-registry/). The API's provider profile, Kin Score and agent-readiness rating are at https://apis.io/providers/xpansiv/.