Root-key login — step 1

POST

/api/auth/root-key/challenge

• Protocol hub (Next.js) — federation, writes, receipts, market context

{ denpaId | username } → { denpaId, nonce, expiresAt } (5 min, single use).

Request Body ^required

object

denpaId

string

username

string

Responses

200

Nonce

400

No_root_key

object

error

required

Stable machine-readable code (snake_case) or a short reason.

string

message

string

key

additional properties

any

404

Not_found

object

error

required

Stable machine-readable code (snake_case) or a short reason.

string

message

string

key

additional properties

any

429

Rate_limited

object

error

required

Stable machine-readable code (snake_case) or a short reason.

string

message

string

key

additional properties

any