Workspace APIs expect your tenant context via workspace_id (query or body) on server-trusted routes, or a workspace session from /workspace/auth/login.
For integrations you build yourself, issue a test API key from the Developer sandbox (below). Send it on every request:
Authorization: Bearer bc_test_xxxxxxxx
X-Workspace-Id: 123
Never expose live keys in browser code. Rotate keys from the sandbox UI if leaked.