---
title: "Register your client (RFC 7591)"
method: POST
path: "/oauth/register"
tags: ["Agent sign-in and A2A"]
---

# Register your client (RFC 7591)

`POST /oauth/register`

## Request

- Base URL: `https://api.helious.io`
- URL: `https://api.helious.io/oauth/register`
- Auth: none declared

Open dynamic client registration, no human step. Public clients only: there is no client secret and PKCE S256 is required. A registered client can do nothing until a person completes the consent screen.

## Request body

- object
  - `client_name` string
  - `redirect_uris` string[], required
  - `grant_types` string[]
  - `response_types` string[]
  - `token_endpoint_auth_method` string
  - `scope` string

## Response `201`

client_id issued

- object

## Other responses

- `400`: invalid client metadata or redirect_uri
- `429`: too many registrations from this address

---

[API](https://skmtc.dev/helious/apis/helious-public-api.md) · [All operations](https://skmtc.dev/helious/apis/helious-public-api/llms.txt) · [OpenAPI document](https://skmtc.dev/helious/apis/helious-public-api/revisions/06bada17ad7a?raw)