Pentect can protect a client while forwarding requests to an existing local or remote gateway.

pentect codex --upstream http://127.0.0.1:8080/openai/v1
pentect claude --upstream http://127.0.0.1:8080/anthropic

The upstream URL is selected for that launch only. Pentect preserves its base path when composing provider endpoints.

Supported contracts

• OpenAI Responses-compatible upstreams for Codex
• Anthropic Messages-compatible upstreams for Claude
• Existing compatible client provider configuration

Bifrost's /openai/v1 and /anthropic paths are included in Pentect's routing tests. LiteLLM and other gateways can use the same protocol contracts; Pentect does not certify every gateway provider or release.

Unsupported protocols

Pentect rejects an unsupported wire protocol before launching the client. A provider being OpenAI-like is not sufficient if its request or streaming format does not match a supported contract. First retry without --upstream to confirm the client works with its default provider. If the custom gateway must be used, follow the unknown-format recovery steps or report its protocol for support.