# Wattwatchers REST API v3 (Mercury)

**Canonical:** https://apis.io/apis/wattwatchers/wattwatchers-rest-api-v3/  
**Provider:** Wattwatchers — https://apis.io/providers/wattwatchers/  
**Base URL:** https://api-v3.wattwatchers.com.au  
**Documentation:** https://docs.wattwatchers.com.au/api/v3/index.html

Wattwatchers REST API v3 (Mercury) is published by [Wattwatchers](https://apis.io/providers/wattwatchers/) on the [APIs.io](https://apis.io/) network, described by a machine-readable OpenAPI specification. Tagged areas include Devices, Short Energy, Long Energy, Modbus, and Energy Data. The published artifact set on APIs.io includes an OpenAPI specification, API documentation, an API reference, authentication docs, rate-limit docs, and a changelog.

The Wattwatchers REST API v3, code-named Mercury — 14 documented operations across 13 paths, covering device inventory and configuration (including switch control via PATCH), 30-second "short energy" interval data, 5-minute "long energy" interval data, and Modbus data read from downstream devices by 6M+One hardware. Authentication is a Wattwatchers-issued bearer API key scoped to the devices assigned to that key. Version 3.6.0 of the published OpenAPI contract.

## Machine-readable artifacts (24)

- **OpenAPI** — https://raw.githubusercontent.com/api-evangelist/wattwatchers/refs/heads/main/openapi/wattwatchers-rest-api-v3-openapi.json
- **Documentation** — https://docs.wattwatchers.com.au/api/v3/index.html
- **APIReference** — https://docs.wattwatchers.com.au/api/v3/endpoints.html
- **InteractiveDocumentation** — https://docs.wattwatchers.com.au/api/v3/openapi/index.html
- **Authentication** — https://docs.wattwatchers.com.au/api/v3/auth.html
- **RateLimits** — https://docs.wattwatchers.com.au/api/v3/rate-limits.html
- **Errors** — https://docs.wattwatchers.com.au/api/v3/errors.html
- **Conventions** — https://docs.wattwatchers.com.au/api/v3/conventions.html
- **ChangeLog** — https://docs.wattwatchers.com.au/api/v3/release-notes.html
- **Documentation** — https://docs.wattwatchers.com.au/api/v3/phase-grouping.html
- **Documentation** — https://docs.wattwatchers.com.au/api/v3/v2-diff.html
- **Documentation** — https://docs.wattwatchers.com.au/api/tips/concepts.html
- **Documentation** — https://docs.wattwatchers.com.au/api/tips/polling-data.html
- **Documentation** — https://docs.wattwatchers.com.au/api/tips/device-catch-up.html
- **Documentation** — https://docs.wattwatchers.com.au/api/tips/modbus-data.html
- **Documentation** — https://docs.wattwatchers.com.au/api/tips/units-conversion.html
- **Documentation** — https://docs.wattwatchers.com.au/api/tips/working-with-timestamps.html
- **Documentation** — https://docs.wattwatchers.com.au/api/tips/switching-example.html
- **SampleCode** — https://github.com/wattwatchers/rest-api-notebooks
- **Overlay** — https://raw.githubusercontent.com/api-evangelist/wattwatchers/refs/heads/main/overlays/wattwatchers-rest-api-v3-overlay.yaml
- **Examples** — https://raw.githubusercontent.com/api-evangelist/wattwatchers/refs/heads/main/examples/wattwatchers-rest-api-v3-examples.json
- **Roadmap** — https://docs.wattwatchers.com.au/api/roadmap.html
- **GettingStarted** — https://service.wattwatchers.com.au/getting-started-with-wattwatchers
- **APIsJSON** — https://raw.githubusercontent.com/api-evangelist/wattwatchers/refs/heads/main/apis.yml

## Tags

Devices, Short Energy, Long Energy, Modbus, Energy Data, Smart Metering

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/apis/wattwatchers/wattwatchers-rest-api-v3/). The API's provider profile, Kin Score and agent-readiness rating are at https://apis.io/providers/wattwatchers/.