---
title: "OAuth 2.0 Device Authorization Request (RFC 8628)"
method: POST
path: "/oauth/device_authorization"
tags: ["OAuth"]
---

# OAuth 2.0 Device Authorization Request (RFC 8628)

`POST /oauth/device_authorization`

## Request

- Base URL: `https://api.mnemom.ai/v1`
- URL: `https://api.mnemom.ai/v1/oauth/device_authorization`
- Auth: none required

Begins the device authorization grant for headless agents / CLIs that cannot perform an interactive redirect. Returns a device_code (the polled secret), a short human-typed user_code, and verification URIs. Public-client posture; the device_code itself is the proof-of-possession (PKCE is not required). The user approves at verification_uri; the client then polls /oauth/token with grant_type=urn:ietf:params:oauth:grant-type:device_code.

## Response `200`

Device authorization response (RFC 8628 §3.2).

- object
  - `device_code` string, required
  - `user_code` string, required
  - `verification_uri` string, uri, required
  - `verification_uri_complete` string, uri, required
  - `expires_in` integer, required
  - `interval` integer, required

## Other responses

- `400`: OAuth error (invalid_request / invalid_scope).
- `401`: Unknown client_id (invalid_client).
- `403`: Cross-origin write refused (`cross_origin_rejected`). A state-changing request that carries the browser session cookie must come from a first-party origin (`Origin`, or failing that `Referer`) and must not send a form-style body (text/plain, urlencoded, multipart) the operation does not declare. Bearer and API-key callers are never subject to this check.
- `429`: Rate-limit exceeded. The global per-IP limiter (100 requests/minute, applied to every `/v1/*` route) rejected this request. Back off until the window resets — `Retry-After` carries the cooldown in seconds and `X-RateLimit-Reset` the absolute reset time.
- `500`: Server error — request was well-formed but the server failed to fulfill it. Typically a downstream dependency (DB / RPC / external API) returned an unexpected error.

---

[API](https://skmtc.dev/mnemom/apis/mnemom-api.md) · [All operations](https://skmtc.dev/mnemom/apis/mnemom-api/llms.txt) · [OpenAPI document](https://skmtc.dev/mnemom/apis/mnemom-api/revisions/274b7a6ea182?raw)