# Start OIDC login flow

**GET /auth/oidc/start**

Validates the auth_start transaction ID, generates PKCE/nonce/state, stores them in a cookie, and redirects to the identity provider.


## Servers
- https://agentengine.mongodb.com: https://agentengine.mongodb.com ()


## Authentication methods
- Bearer auth


## Parameters


### Query parameters

- **tx** (string)
  Transaction ID (hash of auth_start state)



## Responses
### 302
Redirect to identity provider

#### Body: application/json (string)
string
### 400
Bad Request

#### Body: application/json (object)
object
### 500
Internal Server Error

#### Body: application/json (object)
object

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