Internal Core

vercel._internal.core provides the shared runtime used by Vercel Python service packages. It is installed as their dependency and is not intended for direct installation or direct end-user imports.

The distribution contributes service-neutral namespace portions. Import the public session context from vercel.api and shared exceptions from vercel.errors:

from vercel.api import session
from vercel.errors import VercelError

Legacy HTTPX client migration

HTTPX2 is the default HTTP implementation and the only HTTPX family installed by the SDK. As a temporary runtime-only migration path, applications that explicitly install legacy httpx may return a complete httpx.Client or httpx.AsyncClient from session(httpx_client_factory=...). Static annotations remain HTTPX2-based, so type-checked applications need a targeted cast(Any, ...).

Legacy transport objects must remain inside a legacy client; an httpx.HTTPTransport cannot be mounted in an httpx2.Client.