list_scenarios

io.github.fetchsandbox/mcp · Verify this server

List the FAILURE SCENARIOS this sandbox can inject on demand — the specific ways the real provider misbehaves in production. Call this BEFORE claiming an integration works. A checkout that passes on the happy path tells you almost nothing; the bugs that reach customers are declined cards, webhooks delivered twice or out of order, expired tokens, rate limits and slow networks. Typical names: payment_declined, insufficient_funds, webhook_retries, flaky_webhooks, replayed_old_signed_event, signed_event_with_mutated_body, auth_failure, rate_limited, slow_network — but they differ per provider, which is why you list them instead of guessing. Returns each scenario's name and what it does. Arm one with set_scenario, then re-run the same request and check the app still behaves correctly.