Codex Octopus vs Codex Subagent
A side-by-side look at the Codex Octopus and Codex Subagent MCP servers: transport, auth, tools, quality signals, and the config to install either one in Claude, Cursor, Windsurf or VS Code.
C
Codex SubagentCoding Agents · Local subprocess (stdio)Delegate coding tasks to the OpenAI Codex CLI, installed separately, with explicit model and effort.52GoodAuth: not declaredVerdict: choose Codex Octopus for coding agents work as a local process; choose Codex Subagent for coding agents as a local process. You can also run both side by side in one mcpServers block.
Which MCP server should you choose?
Choose Codex Octopus when
- You need dedicated capabilities in the Coding Agents domain.
- You prefer a local stdio subprocess transport.
- You have the keys it needs:
CODEX_API_KEY.
CChoose Codex Subagent when
- You need dedicated capabilities in the Coding Agents domain.
- You prefer a local stdio subprocess transport.
- You want tools like
codex_doctor, list_codex_models, codex_recommend.
Feature & specification comparison
Rows where the two servers differ are marked.
| Spec | C Codex Subagent | |
|---|---|---|
| Category | Coding Agents | Coding Agents |
| Quality signal | 43/100 · Fair | 52/100 · Good |
| Install command | Confirmed | Confirmed |
| Transport | Local subprocess (stdio) | Local subprocess (stdio) |
| Auth | Not declared | Not declared |
| Pricing | Not declared | BYOK (pay the provider) |
| Required env vars | CODEX_API_KEY | None listed |
| Verified owner |
Tools & capabilities
Codex Octopus tools
No tool names declared yet. Check the project README from the listing page.
Codex Subagent tools 8
codex_doctorCheck the Codex CLI installation and report how to fix it; opt in with `extended: true` for a slow, networked `config.load` report.list_codex_modelsList available models and their reasoning-effort levels.codex_recommendSuggest a model and effort for a described task.codex_delegateRun a task, blocking or in the background, optionally returning JSON that matches a schema.codex_follow_upContinue a previous delegation using its `thread_id`, with or without a schema.codex_job_statusCheck a background delegation.codex_job_resultRead a finished background delegation's output.codex_job_cancelStop a running background delegation.
Ready-to-paste client configs
Paste either block (or both) into your client config, e.g. claude_desktop_config.json or ~/.cursor/mcp.json. We only show a config when the install command is confirmed.
Codex Octopus
{
"mcpServers": {
"codex-octopus": {
"command": "npx",
"args": [
"codex-octopus@latest"
],
"env": {
"CODEX_API_KEY": "YOUR_CODEX_API_KEY_HERE"
}
}
}
}
Codex Subagent
{
"mcpServers": {
"codex-subagent": {
"command": "npx",
"args": [
"-y",
"codex-subagent-mcp"
]
}
}
}
Frequently asked questions
Codex Octopus is categorized under Coding Agents and uses a local stdio subprocess. Codex Subagent belongs to Coding Agents and uses a local stdio subprocess. Pick Codex Octopus for coding agents work and Codex Subagent for coding agents.
Copy the mcpServers block from the config section on this page into your client's config (for example claude_desktop_config.json or ~/.cursor/mcp.json), then fully restart the client.
Codex Octopus has no declared pricing — check the project's own site. Codex Subagent is bring-your-own-key: usage is billed by the API provider you supply a key for. If a server needs environment variables such as API keys, define them under the env key in your client's MCP config.
Yes. MCP clients support multiple servers: add codex-octopus and codex-subagent as separate keys in the same mcpServers object, and your assistant will call tools from either one.
On AllMCPs, Codex Octopus has a quality signal of 43/100 (Fair) with 0 views, 0 installs and 20 GitHub stars. Codex Subagent has 52/100 (Good) with 0 views, 0 installs and 0 GitHub stars.