---
title: API Reference
description: Comprehensive reference documentation for Blues developer APIs
source_url: https://dev.blues.io/api-reference/
canonical_url: https://dev.blues.io/api-reference/
markdown_url: https://dev.blues.io/api-reference.md
---

# API Reference

Comprehensive reference documentation for Blues developer APIs

### Notecard API

APIs for interacting with the Notecard in host firmware.

#### In this section

[Introduction](https://dev.blues.io/api-reference/notecard-api.md)[card Requests](https://dev.blues.io/api-reference/notecard-api/card-requests.md)[dfu Requests](https://dev.blues.io/api-reference/notecard-api/dfu-requests.md)[env Requests](https://dev.blues.io/api-reference/notecard-api/env-requests.md)[file Requests](https://dev.blues.io/api-reference/notecard-api/file-requests.md)[hub Requests](https://dev.blues.io/api-reference/notecard-api/hub-requests.md)[note Requests](https://dev.blues.io/api-reference/notecard-api/note-requests.md)[ntn Requests](https://dev.blues.io/api-reference/notecard-api/ntn-requests.md)[var Requests](https://dev.blues.io/api-reference/notecard-api/var-requests.md)[web Requests](https://dev.blues.io/api-reference/notecard-api/web-requests.md)

### Notehub API

APIs for interacting with Notehub over HTTP.

#### In this section

[Introduction](https://dev.blues.io/api-reference/notehub-api.md)[Authorization API](https://dev.blues.io/api-reference/notehub-api/authorization-api.md)[Billing Account API](https://dev.blues.io/api-reference/notehub-api/billing-account-api.md)[Device API](https://dev.blues.io/api-reference/notehub-api/device-api.md)[Event API](https://dev.blues.io/api-reference/notehub-api/event-api.md)[Jobs API](https://dev.blues.io/api-reference/notehub-api/jobs-api.md)[Monitor API](https://dev.blues.io/api-reference/notehub-api/monitor-api.md)[Organization API](https://dev.blues.io/api-reference/notehub-api/organization-api.md)[Project API](https://dev.blues.io/api-reference/notehub-api/project-api.md)[Route API](https://dev.blues.io/api-reference/notehub-api/route-api.md)[Usage API](https://dev.blues.io/api-reference/notehub-api/usage-api.md)

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## Other Resources

### [Glossary](https://dev.blues.io/api-reference/glossary.md)

[A comprehensive listing of terms and definitions used throughout Blues hardware and services.](https://dev.blues.io/api-reference/glossary.md)

[Read glossary](https://dev.blues.io/api-reference/glossary.md)

### [System Notefiles](https://dev.blues.io/api-reference/system-notefiles.md)

[A reference of all Notefiles created automatically on the Notecard and/or on Notehub.](https://dev.blues.io/api-reference/system-notefiles.md)

[Visit reference](https://dev.blues.io/api-reference/system-notefiles.md)