# Quaderno Authentication API

**Canonical:** https://apis.io/apis/quaderno/quaderno-authentication-api/  
**Provider:** Quaderno — https://apis.io/providers/quaderno/  
**Base URL:** https://ACCOUNT_NAME.quadernoapp.com/api  
**Documentation:** https://developers.quaderno.io/api/

Quaderno Authentication API is one of 14 APIs that [Quaderno](https://apis.io/providers/quaderno/) publishes on the [APIs.io](https://apis.io/) network, described by a machine-readable OpenAPI specification. Tagged areas include Authentication. The published artifact set on APIs.io includes an OpenAPI specification, API documentation, and an API reference.

Ping the API and inspect the authenticated account and rate-limit state.

## Machine-readable artifacts (8)

- **OpenAPI** — https://raw.githubusercontent.com/api-evangelist/quaderno/refs/heads/main/openapi/quaderno-authentication-api-openapi.yml
- **Documentation** — https://developers.quaderno.io/api/
- **APIReference** — https://developers.quaderno.io/api/
- **PostmanCollection** — https://raw.githubusercontent.com/api-evangelist/quaderno/refs/heads/main/collections/quaderno.postman_collection.json
- **OpenCollection** — https://raw.githubusercontent.com/api-evangelist/quaderno/refs/heads/main/collections/quaderno.opencollection.json
- **Documentation** — https://developers.quaderno.io/guides/checkout/
- **Documentation** — https://developers.quaderno.io/guides/webhooks/
- **APIsJSON** — https://raw.githubusercontent.com/api-evangelist/quaderno/refs/heads/main/apis.yml

## Other Quaderno APIs (12)

- [Quaderno Checkout API](https://apis.io/apis/quaderno/quaderno-checkout-api/)
- [Quaderno Contacts API](https://apis.io/apis/quaderno/quaderno-contacts-api/)
- [Quaderno Credits API](https://apis.io/apis/quaderno/quaderno-credits-api/)
- [Quaderno Estimates API](https://apis.io/apis/quaderno/quaderno-estimates-api/)
- [Quaderno Evidences API](https://apis.io/apis/quaderno/quaderno-evidences-api/)
- [Quaderno Expenses API](https://apis.io/apis/quaderno/quaderno-expenses-api/)
- [Quaderno Invoices API](https://apis.io/apis/quaderno/quaderno-invoices-api/)
- [Quaderno Items API](https://apis.io/apis/quaderno/quaderno-items-api/)
- [Quaderno Payments API](https://apis.io/apis/quaderno/quaderno-payments-api/)
- [Quaderno Recurring API](https://apis.io/apis/quaderno/quaderno-recurring-api/)
- [Quaderno Taxes API](https://apis.io/apis/quaderno/quaderno-taxes-api/)
- [Quaderno Transactions API](https://apis.io/apis/quaderno/quaderno-transactions-api/)

## Tags

Authentication

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