gpt2agent 0.0.5

Use your ChatGPT Plus/Pro in Claude Code and other AI agents — one command setup

gpt2agent

Your codex login → full ChatGPT Plus/Pro account inside any MCP client.

Use your ChatGPT Plus or Pro subscription — every model, every account-tier feature — inside Claude Code, Codex, and any MCP client.

---

What it does

gpt2agent exposes 25 MCP tools that forward requests directly to ChatGPT's backend API. No proxy process. No separate account. No platform API key. Your codex login, your token, your quota.

If you already have the codex CLI logged in, setup is zero extra steps — gpt2agent reuses the same ~/.codex/auth.json bearer and picks up its background-refreshed token automatically.

Works with Claude Code, Codex CLI, and any client that speaks the MCP protocol over stdio.

---

Install — one line

curl -fsSL https://raw.githubusercontent.com/robotlearning123/gpt2agent/main/install.sh | bash

That command:

1. Installs gpt2agent via pipx (creates an isolated env).
2. Reuses your existing ~/.codex/auth.json if you've run codex login — no separate ChatGPT token paste needed.
3. Detects which MCP clients you have (Claude Code, Codex) and writes the right config snippet for each.
4. Drops the deep-research Claude Code skill into ~/.claude/skills/.

Or step-by-step

# 1. Install the package globally (isolated venv)
pipx install gpt2agent

# 2. Register with all detected MCP clients (Claude Code, Codex)
gpt2agent install                          # auto-detect everything

# Want only one client?
gpt2agent install --client claude-code
gpt2agent install --client codex

# HTTP transport instead of stdio?
gpt2agent install --transport http --http-port 9000

Per-client config

The install subcommand writes the right thing for each:

Client	File	Section
Claude Code	~/.claude.json	mcpServers.gpt2agent (stdio: gpt2agent run --stdio)
Codex CLI	~/.codex/config.toml	[mcp_servers.gpt2agent]

Both are idempotent and back up the prior file as <name>.bak-gpt2agent.

After running install, restart Claude Code so it re-spawns the subprocess. Codex picks up the new server on its next invocation automatically.

Manual config (if you'd rather not run install)

Claude Code — add to ~/.claude.json:

{
  "mcpServers": {
    "gpt2agent": {
      "type": "stdio",
      "command": "gpt2agent",
      "args": ["run", "--stdio"]
    }
  }
}

Codex CLI — add to ~/.codex/config.toml:

[mcp_servers.gpt2agent]
command = "gpt2agent"
args = ["run", "--stdio"]

---

Setup (manual token paste — only if codex isn't available)

gpt2agent setup

Prompts for a ChatGPT session token and saves it to ~/.gpt2agent/token.json. The codex login flow is preferred when available because codex auto-refreshes its token; gpt2agent reloads ~/.codex/auth.json on mtime change so long calls don't 401 mid-flight.

---

Tools (25)

Chat & reasoning

Tool	What it does
chat	Talk to any model on your account (gpt-5-3 default, override via model=). Pass gpt-5-5-pro, o3-pro, gpt-5-4-thinking, …
agent	Agent Mode — 262K context with autonomous browsing, code execution, tool use
deep_research	Web-augmented research with citations (~30–120 s). Auto-confirms by default
deep_research_heavy	Long-form DR via gpt-5-5-pro + connector (5–30 min, monthly quota). Configurable via [models].heavy_dr
gpt_chat	Talk through one of your private Custom GPTs (g-p-*) — experimental

Image & file management

Tool	What it does
generate_image	Generate images via ChatGPT's built-in DALL-E. Returns download URLs + metadata
get_file_info	Metadata for any ChatGPT file (images, uploads)
get_file_download_url	Temporary download URL for a ChatGPT file (~1h expiry)

Code execution

Tool	What it does
code_interpreter	Run Python in ChatGPT's sandbox. Returns output + any generated charts/images
canvas_execute	Execute code via ChatGPT's Canvas feature (live editing environment)

Account introspection

Tool	What it does
account_status	Plan, country, MFA, feature count, subscription expiry
list_models	All models on your account (slug, max_tokens, reasoning_type, capabilities, enabled_tools)
list_conversations	Recent ChatGPT conversations (titles: emails/phones redacted)
get_conversation	Full message history for a specific conversation (multimodal, code, images)
list_tasks	Scheduled / completed ChatGPT tasks
list_apps	Connected apps + connectors
list_custom_gpts	Your private g-p-* GPTs

Memory & instructions

Tool	What it does
memory_list	List all ChatGPT memory entries (emails/phones redacted)
memory_search	Keyword filter over memories
memory_create_via_chat	Add a memory (model-initiated workaround — POST /memories is 405)
custom_instructions_get	Read your current about_user / about_model
custom_instructions_set	Update them (read-modify-write, preserves unspecified fields)

Codex (cloud agent)

Tool	What it does
list_codex_envs	Codex environments (label, repos, network policy)
list_codex_tasks	Recent Codex tasks + status
codex_task_create	Kick off a new Codex task (resolves env from repo_label)

---

Architecture

Native Python implementation — no proxy. The server calls /backend-api/conversation (SSE) directly using curl_cffi for TLS impersonation. Vendored POW and Turnstile solvers handle the OpenAI Sentinel challenge. Token is reloaded from disk on each request, so codex's background refresh propagates transparently. See NOTICES for attribution.

~/.codex/auth.json  (or ~/.gpt2agent/token.json)  ← auto-refreshed by codex
        |
   gpt2agent  (stdio MCP server, token reloaded on each call)
        |
   curl_cffi  →  chatgpt.com /backend-api/{conversation,f/conversation,me,
                                          models, memories, codex, gizmos, ...}
        |
   25 MCP tools  (chat, agent, DR ×2, GPT chat, image gen,
                  code interpreter, canvas, memory r/w,
                  instructions r/w, codex r/w, account introspect)

---

Configuration

Optional ~/.gpt2agent/config.toml or ./config.toml:

[server]
host = "127.0.0.1"   # loopback only; the HTTP transport is UNAUTHENTICATED
port = 9000

[models]
chat     = "gpt-5-3"        # default for chat tool
agent    = "agent-mode"     # default for agent tool
heavy_dr = "gpt-5-5-pro"    # override slug for deep_research_heavy

---

Limitations

• Deep Research quota: roughly ~248 heavy requests / monthly cycle on Pro, lower on Plus — approximate and account/region-dependent, not a guaranteed number.
• Account-tier features not yet supported: Sora video, Operator/CUA, voice sessions. These use HTTP endpoints that return 404 or haven't yet been reverse-engineered out of the chatgpt.com web bundle.
• gpt_chat is experimental — gizmo_id payload field verified against web traffic but not load-tested across all g-p-* types.
• Requires an active ChatGPT Plus or Pro subscription.

---

Security & risk — read before you run this

gpt2agent talks to ChatGPT's private backend the way the web app does. That has real consequences; please understand them before pointing it at your account.

• It impersonates the chatgpt.com web client. It uses curl_cffi TLS fingerprint impersonation and vendored Proof-of-Work + Cloudflare Turnstile solvers to pass the OpenAI Sentinel challenge. This is very likely against the OpenAI Terms of Service, and automated/abnormal traffic can get your account rate-limited, challenged, suspended, or banned. Use an account you can afford to lose, keep volume human-scale, and don't rely on it for anything critical. This is a reverse-engineering / research tool, not an official API.
• The HTTP transport is UNAUTHENTICATED. It proxies your entire account — read all conversations, spend Deep Research quota, overwrite custom instructions, launch Codex cloud tasks. Anyone who can reach the port controls your account. Therefore:
  • Use stdio (the default for gpt2agent install) for local clients like Claude Code and Codex. It is not network-exposed.
  • The server binds 127.0.0.1 by default and refuses to start the HTTP transport on a non-loopback host unless you explicitly set GPT2AGENT_ALLOW_REMOTE=1. Only do that behind your own auth proxy / firewall.
• Your token stays local. It is read from ~/.codex/auth.json (or ~/.gpt2agent/token.json, chmod 600) and sent only to chatgpt.com. gpt2agent never transmits it anywhere else. Token/secret values are redacted from error messages and logs (best-effort).
• PII redaction is limited. Tools that return conversation/memory data strip only emails and phone numbers from text — names, addresses, IDs, and the full message bodies of get_conversation are returned verbatim. Don't treat the output as anonymized.
• GPT2AGENT_RAW_DUMP (debug) writes raw, unredacted SSE/poll traffic — including prompts, responses, and resume tokens — to the path you give it. Use only for debugging and delete the dumps after.

Found a security issue? See SECURITY.md.

---

Development

python -m venv .venv
source .venv/bin/activate
pip install -e ".[dev]"
pytest

Release

Tagged releases are configured to publish to PyPI and create a GitHub Release with the matching CHANGELOG section:

# bump version
$EDITOR pyproject.toml             # e.g. "0.0.3" → "0.0.4"
$EDITOR CHANGELOG.md               # add ## [0.0.4] - YYYY-MM-DD ...
git commit -am "release: 0.0.4"
git tag v0.0.4
git push origin main --tags        # release workflow fires on the tag

The release workflow (.github/workflows/release.yml) verifies the tag matches pyproject.toml, runs the test matrix, builds wheel + sdist, publishes to PyPI via OIDC trusted publishing, and posts a GitHub Release with that version's CHANGELOG body.

One-time PyPI setup required before the first publish succeeds. PyPI's OIDC exchange needs a Trusted Publisher registered for this repo (project gpt2agent, owner robotlearning123, workflow release.yml, environment pypi) at pypi.org → Publishing — or a first manual twine upload to create the project. Until that is done the release job fails with invalid-publisher and the package is not on PyPI; the install.sh one-liner falls back to a git+https install in the meantime.

---

License

MIT. See NOTICES for third-party attributions.

---

Acknowledgments

• lanqian528/chat2api — POW and Turnstile solver code (MIT)
• basketikun/chatgpt2api — survey of ChatGPT backend API patterns
• 7836246/cursor2api — survey of Cursor API patterns