# Nopan Authentication APIs API

**Canonical:** https://apis.io/apis/nopan/nopan-authentication-apis-api/  
**Provider:** Nopan — https://apis.io/providers/nopan/  
**Base URL:** https://api.nopan.io  
**Documentation:** https://docs.nopan.com/

Nopan Authentication APIs API is one of 5 APIs that [Nopan](https://apis.io/providers/nopan/) publishes on the [APIs.io](https://apis.io/) network, described by a machine-readable OpenAPI specification. Tagged areas include Authentication APIs. The published artifact set on APIs.io includes an OpenAPI specification and authentication docs.

This section covers the endpoints required for securely obtaining OAuth 2.0 access tokens to interact with the Nopan API. These APIs support machine-to-machine (M2M) authentication using mutual TLS (mTLS) and client credentials. A valid access token is required to authorize all subsequent requests to protected resources.

## Machine-readable artifacts (12)

- **OpenAPI** — https://raw.githubusercontent.com/api-evangelist/nopan/refs/heads/main/openapi/nopan-authentication-apis-api-openapi.yml
- **Authentication** — https://raw.githubusercontent.com/api-evangelist/nopan/refs/heads/main/authentication/nopan-authentication.yml
- **OAuthScopes** — https://raw.githubusercontent.com/api-evangelist/nopan/refs/heads/main/scopes/nopan-scopes.yml
- **Conventions** — https://raw.githubusercontent.com/api-evangelist/nopan/refs/heads/main/conventions/nopan-conventions.yml
- **ErrorCatalog** — https://raw.githubusercontent.com/api-evangelist/nopan/refs/heads/main/errors/nopan-error-codes.yml
- **Webhooks** — https://raw.githubusercontent.com/api-evangelist/nopan/refs/heads/main/asyncapi/nopan-webhooks.yml
- **Sandbox** — https://raw.githubusercontent.com/api-evangelist/nopan/refs/heads/main/sandbox/nopan-sandbox.yml
- **DataModel** — https://raw.githubusercontent.com/api-evangelist/nopan/refs/heads/main/data-model/nopan-data-model.yml
- **APIsJSON** — https://raw.githubusercontent.com/api-evangelist/nopan/refs/heads/main/apis.yml
- **Arazzo** — https://raw.githubusercontent.com/api-evangelist/nopan/refs/heads/main/arazzo/_index.yml
- **Arazzo** — https://raw.githubusercontent.com/api-evangelist/nopan/refs/heads/main/arazzo/nopan-accept-payment.yml
- **Arazzo** — https://raw.githubusercontent.com/api-evangelist/nopan/refs/heads/main/arazzo/nopan-refund-payment.yml

## Other Nopan APIs (4)

- [Nopan Payment Processing APIs API](https://apis.io/apis/nopan/nopan-payment-processing-apis-api/)
- [Nopan Reporting APIs API](https://apis.io/apis/nopan/nopan-reporting-apis-api/)
- [Nopan Testing APIs API](https://apis.io/apis/nopan/nopan-testing-apis-api/)
- [Nopan Webhooks API](https://apis.io/apis/nopan/nopan-webhooks-api/)

## Tags

Authentication APIs

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