sybil-solutions/codex-shim
Local Responses-API shim that exposes Factory BYOK models (and optional ChatGPT GPT-5.5 passthrough) to Codex Desktop. observed · 2026-08-28
Health v2 · maintenance only
58/100
- Activity 99
- Release rhythm 35
- Longevity 7
Flags: no_releases young
How is this computed?
round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10) — computed 2026-09-03. Adoption (stars, forks) is never an input.
- gap_med: n/a
- age_days: 103
- days_rel: n/a
- days_push: 8
- n_releases_24m: 0
Adoption not part of the score
1064 stars · 107 forks observed · 2026-08-28
What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded
A local Python/aiohttp server that exposes an OpenAI Responses-compatible endpoint on loopback, letting Codex Desktop use any BYOK model (OpenAI, Anthropic, OpenRouter, local proxies) plus optional ChatGPT and Cursor subscription passthrough. It translates streaming responses, tool calls, and reasoning blocks between Codex's expected format and each upstream API without rebuilding Codex.
Use cases
- use my own API keys with Codex Desktop
- add custom models to the Codex model picker
- route Codex requests to Anthropic or OpenRouter models
- use my ChatGPT subscription's Codex model via API
- route coding tasks to the cheapest capable model automatically
- proxy and rewrite prompts before they hit an LLM upstream
When to choose
- you use Codex Desktop and want BYOK or subscription models it doesn't officially expose
- you want local model routing without rebuilding or patching Codex
- you need tool-call and streaming translation between Responses API and other LLM APIs
- you want a local proxy layer in front of LLM requests for prompt policy or deduplication
When to avoid
- you don't use Codex Desktop or Cursor
- you need a production-grade, officially supported API gateway
- you rely on Codex versions whose internal formats the shim hasn't been tested against
- you want a hosted service rather than a local loopback server
Facets
service · maturity active
http-server middleware llm-inference sdk large-language-models developer-tools apis backend python windows cross-platform cli api-shim responses-api codex byok model-routing proxy aiohttp chatgpt-passthrough cursor-passthrough local-server macos linux
1 source
- readme: https://github.com/sybil-solutions/codex-shim · fetched 2026-08-28 · 26a051cc9449
Member repositories
| Repository | Role | Health v2 |
|---|---|---|
| sybil-solutions/codex-shim | main | 58 |
For agents
markdown · JSON · MCP: product_card(name="sybil-solutions/codex-shim")
Data as of 2026-08-30T08:39:29.467469+00:00 · Report a problem