---
title: "OpenID Connect discovery"
method: GET
path: "/.well-known/openid-configuration"
tags: ["Identity Provider"]
---

# OpenID Connect discovery

`GET /.well-known/openid-configuration`

## Request

- Base URL: `https://id.deadsimple.email`
- URL: `https://id.deadsimple.email/.well-known/openid-configuration`
- Auth: none required

Issuer, endpoint URLs, supported scopes and claims, ES256, S256 PKCE, and the non-standard `agent_authentication_methods_supported` (api_key, assertion, browser). Cached one hour. Note that the same path on api.deadsimple.email returns the MCP OAuth server's metadata instead.

## Response `200`

The provider metadata document.

---

[API](https://skmtc.dev/deadsimple/apis/dead-simple-email-api.md) · [All operations](https://skmtc.dev/deadsimple/apis/dead-simple-email-api/llms.txt) · [OpenAPI document](https://skmtc.dev/deadsimple/apis/dead-simple-email-api/revisions/c697881be131?raw)