Navan Common Errors Overview Diagnose and resolve Navan API errors using targeted fix procedures. All errors surface as raw HTTP status codes since Navan has no public SDK — this guide covers 401, 403, 404, 429, 500, and 503 with curl-based diagnostics. Purpose: Identify the root cause of a Navan API error and apply the correct fix. Prerequisites - Navan API credentials configured (see ) - and available in your terminal - Environment variables set: , , Instructions Error 401 — Unauthorized (Invalid or Expired OAuth Token) Root causes: 1. OAuth token has expired (tokens have a limited window)…