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Codex CLI (OpenAI)

OpenAI-compatible (with /v1)

OpenAI's command-line coding tool.

Base URL

https://api.llmapi.pro:99/v1

API Key

sk-... (create in Console → API Keys)

Recommended

claude-opus-4-8 · claude-sonnet-4-6 · claude-haiku-4-5

Setup steps

Configure a custom provider in ~/.codex/config.toml (mind the wire_api line — the #1 reason Codex fails to connect):

model = "claude-opus-4-8"
model_provider = "llmapi"

[model_providers.llmapi]
name = "llmapi"
base_url = "https://api.llmapi.pro:99/v1"
wire_api = "responses"
env_key = "LLMAPI_API_KEY"

Set the key env var, then run codex: export LLMAPI_API_KEY=sk-YOUR_KEY

Notes

Recent Codex uses the Responses API (/v1/responses), so set wire_api to "responses" (the old "chat" value was removed). We support both, so the config above just works.
Base URL includes /v1; Codex appends /responses itself.

Client not listed? Any "OpenAI-compatible" app works: Base URL = https://api.llmapi.pro:99/v1, key = your sk-..., type the model name. Or email [email protected].

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