WhatsApp Gateway
API referenceSessions

Get the current pairing QR code

Returns the QR code to scan from WhatsApp on the phone (Settings → Linked devices → Link a device) to attach a number to this session. Requires the `manage` capability. **Behavior.** Returns the raw QR code string in the JSON body. **Side effect.** If no code is ready yet, this endpoint *starts pairing* and returns `not_found` (404) until a code exists. QR codes are short-lived and refresh periodically; they also stream live over the event stream as `auth.qr` events, so the recommended pattern is to subscribe there and follow the codes as they rotate rather than polling. **Precondition.** The session must be unpaired — requesting a QR for an already-paired session returns an error. **Errors.** `not_found` (404) — no code ready yet (pairing was started) or session unknown. `unauthorized` (401) / `forbidden` (403) — credential / capability failures.

GET
/api/v1/sessions/{session}/qr

Authorization

AuthorizationBearer <token>

Send Authorization: Bearer <token>. The router accepts two kinds of token and tries each in turn: a frontend-minted login JWT (verified against the frontend JWKS; the person's org + role are read from it), or an api-key for a script/service (carrying a fixed set of gateway permissions). The bearerFormat: JWT label describes the person-login case.

In: header

Path Parameters

session*string

The session id — a session is one attached (or to-be-attached) WhatsApp number, scoped to your organization. A session in another organization is reported as not_found (404), never forbidden.

Response Body

application/json

application/json

curl -X GET "https://example.com/api/v1/sessions/sess_01HZX8K3M9/qr"
{  "code": "string",  "expiresAt": 0}
{  "error": {    "code": "not_found",    "details": {      "property1": null,      "property2": null    },    "message": "session not found"  }}

Request a phone pairing code POST

Requests a pairing code to attach a number **without scanning a QR** — the alternative to the QR endpoint. Requires the `manage` capability. **Input.** Pass the target `phone` (international format, digits only, no leading + — e.g. `628123456789`) in the request body. **Output.** The response returns a short code such as `ABCD-1234` to enter in WhatsApp on that phone under Settings → Linked devices → Link a device → Link with phone number instead. **Precondition.** The session must be unpaired; requesting a code for an already-paired session returns an error. The code is short-lived — request a fresh one if it expires before use. **Errors.** `validation_error` (400) — missing or malformed `phone`, or the session is already paired. `not_found` (404) — no such session in your organization. `unauthorized` (401) / `forbidden` (403) — credential / capability failures.

Log out a session (unpair the device) POST

Logs the session out of WhatsApp and **unlinks the device**, so the number is no longer attached. Requires the `manage` capability. **Destructive.** Unlike `:stop` (which keeps the pairing), logout severs the link: to use the number again you must pair it from scratch via QR or a pairing code. The session row itself remains — use `DELETE /sessions/{session}` to remove it entirely. **Idempotency.** Logging out a session that is already logged out / unpaired is a harmless no-op. The response returns the refreshed session so you can see its new status. **Errors.** `not_found` (404) — no such session in your organization. `unauthorized` (401) / `forbidden` (403) — credential / capability failures. Returns **200** with the refreshed session.