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Connect apps to OpenAI Codex with Arc0 MCP
Sign in to Arc0 and connect an available app in My apps. Early-access apps require enablement for your organization. Authorize OpenAI Codex separately so it can use the tools and accounts allowed for your identity.
Codex app + CLI
- Run the registration command below. The app and CLI share ~/.codex/config.toml.
- Complete browser OAuth, choose your Arc0 workspace, and review access. If authentication does not start, run codex mcp login arc0.
- Check codex mcp list, then open a new Codex chat. Inspect an existing arc0 entry before changing it.
codex mcp add arc0 --url https://api.arc0.ai/mcpFull MCP setup and troubleshootingStart with a read: ask the agent to find the tool, load its schema and execute against the intended account. Check Activity for the receipt before trying a write.
Apps for OpenAI Codex
1 available, 123 early access, 1405 coming soon, 1 in private preview. Available and early-access apps appear first; coming-soon apps are not callable yet.
1,535 APPS