# Envoy Proxy External Authorization API

**Canonical:** https://apis.io/apis/envoy-proxy/external-authorization-api/  
**Provider:** Envoy Proxy — https://apis.io/providers/envoy-proxy/  
**Documentation:** https://www.envoyproxy.io/docs/envoy/latest/configuration/http/http_filters/ext_authz_filter

Envoy Proxy External Authorization API is one of 25 APIs that [Envoy Proxy](https://apis.io/providers/envoy-proxy/) publishes on the [APIs.io](https://apis.io/) network. Tagged areas include Authorization, gRPC, Proxies, and Security. The published artifact set on APIs.io includes API documentation, an API reference, and a GitHub repository.

The Envoy External Authorization API provides a gRPC or HTTP interface for delegating authorization decisions to an external service. When a request arrives, Envoy calls the ext_authz service, which can approve, deny, or modify the request before it is forwarded to the upstream. This enables policy-based access control enforced at the proxy layer.

## Machine-readable artifacts (3)

- **Documentation** — https://www.envoyproxy.io/docs/envoy/latest/configuration/http/http_filters/ext_authz_filter
- **Reference** — https://www.envoyproxy.io/docs/envoy/latest/api-v3/extensions/filters/http/ext_authz/v3/ext_authz.proto
- **GitHubRepository** — https://github.com/envoyproxy/envoy

## Other Envoy Proxy APIs (12)

- [Envoy Proxy Rate Limit Service API](https://apis.io/apis/envoy-proxy/rate-limit-service-api/)
- [Envoy Proxy Health Discovery Service API](https://apis.io/apis/envoy-proxy/health-discovery-service-api/)
- [Envoy Proxy gRPC Access Log Service API](https://apis.io/apis/envoy-proxy/access-log-service-api/)
- [Envoy Proxy External Processing API](https://apis.io/apis/envoy-proxy/external-processing-api/)
- [Envoy Proxy Metrics Service API](https://apis.io/apis/envoy-proxy/metrics-service-api/)
- [Envoy Proxy Tap Service API](https://apis.io/apis/envoy-proxy/tap-service-api/)
- [Envoy Proxy Certificates API](https://apis.io/apis/envoy-proxy/envoy-proxy-certificates-api/)
- [Envoy Proxy Cluster Discovery API](https://apis.io/apis/envoy-proxy/envoy-proxy-cluster-discovery-api/)
- [Envoy Proxy Clusters API](https://apis.io/apis/envoy-proxy/envoy-proxy-clusters-api/)
- [Envoy Proxy Configuration API](https://apis.io/apis/envoy-proxy/envoy-proxy-configuration-api/)
- [Envoy Proxy Debugging API](https://apis.io/apis/envoy-proxy/envoy-proxy-debugging-api/)
- [Envoy Proxy Endpoint Discovery API](https://apis.io/apis/envoy-proxy/envoy-proxy-endpoint-discovery-api/)

## Tags

Authorization, gRPC, Proxies, Security

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