# Agentcard Authentication API

**Canonical:** https://apis.io/apis/agentcard/agentcard-authentication-api/  
**Provider:** Agentcard — https://apis.io/providers/agentcard/  
**Base URL:** https://api.agentcard.sh  
**Documentation:** https://docs.agentcard.sh/companies/api/overview

Agentcard Authentication API is one of 5 APIs that [Agentcard](https://apis.io/providers/agentcard/) 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.

Exchange your client credentials for a platform access token, and introspect what a token acts as.

## Machine-readable artifacts (5)

- **OpenAPI** — https://raw.githubusercontent.com/api-evangelist/agentcard/refs/heads/main/openapi/agentcard-authentication-api-openapi.yml
- **APIsJSON** — https://raw.githubusercontent.com/api-evangelist/agentcard/refs/heads/main/apis.yml
- **Arazzo** — https://raw.githubusercontent.com/api-evangelist/agentcard/refs/heads/main/arazzo/_index.yml
- **Arazzo** — https://raw.githubusercontent.com/api-evangelist/agentcard/refs/heads/main/arazzo/agentcard-connect-and-verify.arazzo.yml
- **Arazzo** — https://raw.githubusercontent.com/api-evangelist/agentcard/refs/heads/main/arazzo/agentcard-fund-wallet.arazzo.yml

## Other Agentcard APIs (4)

- [Agentcard Connect API](https://apis.io/apis/agentcard/agentcard-connect-api/)
- [Agentcard Identity verification API](https://apis.io/apis/agentcard/agentcard-identity-verification-api/)
- [Agentcard Wallet funding API](https://apis.io/apis/agentcard/agentcard-wallet-funding-api/)
- [Agentcard Withdrawals API](https://apis.io/apis/agentcard/agentcard-withdrawals-api/)

## Tags

Authentication

---

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