POST /api/auth/discover — given a login email, return a per-organization BYO-OIDC start URL if its verified domain maps to an enabled IdP, else `None` (ADR 0031 D2a). ALWAYS 200 and non-enumerating: it never reveals whether an email or account exists. It does NOT call `normalize_email` (which errors on malformed) — the service normalizes and returns `None` for malformed input.

POST

/api/auth/discover

curl --request POST \
  --url https://example.com/api/auth/discover \
  --header 'Content-Type: application/json' \
  --data '{ "email": "example" }'

Request Body^required

Media typeapplication/json

object

email

required

string

Example^generated

{
  "email": "example"
}

Responses

200

SSO redirect URL for the email’s org, or null

Media typeapplication/json

object

sso_redirect

The per-organization BYO-OIDC start URL, or null when the email’s domain maps to no enabled IdP.

string | null

Example^generated

{
  "sso_redirect": "example"
}

400

Structured client error

Media typeapplication/json

The canonical JSON body of every error response — the single source of truth the frontend binds to. Every AppError serializes as this exact shape, and the generated OpenAPI component ApiErrorBody (with its ErrorCode enum) is what the frontend error schema is generated from, so there is no hand-written error schema on either end.

object

code

required

Machine-readable, stable error code.

string

Allowed values: not_found unauthorized forbidden bad_request unprocessable precondition_failed conflict method_not_allowed rate_limited quota_exceeded database_error docker_error vault_error internal_error

details

One of:

null

null

object

Present only on a quota-exceeded 403 — the inline upgrade-CTA payload.

object

key

required

The entitlement feature key that was hit, e.g. apps.max_count.

string

limit

required

The plan’s limit for this key.

integer format: int64

upgrade_url

required

Where to send the user to upgrade.

string

used

required

Current usage (count or bytes, per the key).

integer format: int64

error

required

Human-readable message (the server’s English text; the client may localize by code).

string

Example

{
  "code": "not_found"
}

500

Structured server error

Media typeapplication/json

The canonical JSON body of every error response — the single source of truth the frontend binds to. Every AppError serializes as this exact shape, and the generated OpenAPI component ApiErrorBody (with its ErrorCode enum) is what the frontend error schema is generated from, so there is no hand-written error schema on either end.

object

code

required

Machine-readable, stable error code.

string

Allowed values: not_found unauthorized forbidden bad_request unprocessable precondition_failed conflict method_not_allowed rate_limited quota_exceeded database_error docker_error vault_error internal_error

details

One of:

null

null

object

Present only on a quota-exceeded 403 — the inline upgrade-CTA payload.

object

key

required

The entitlement feature key that was hit, e.g. apps.max_count.

string

limit

required

The plan’s limit for this key.

integer format: int64

upgrade_url

required

Where to send the user to upgrade.

string

used

required

Current usage (count or bytes, per the key).

integer format: int64

error

required

Human-readable message (the server’s English text; the client may localize by code).

string

Example

{
  "code": "not_found"
}