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Connect Hex to Codex

Give Codex governed access to Hex’s 18 tools through Runlayer, with identity, policy, scanning, and audit on every call.

Book a demo Codex setup guide

Set up

Add Hex to Codex in four steps

Admins approve the server once. Everyone in Codex then gets it through the same governed connection.

  1. 1

    Approve Hex in Runlayer

    Add Hex from the catalog and choose who can use it and which of its tools are allowed.

  2. 2

    Connect Codex to Runlayer

    Runlayer’s CLI adds the Runlayer Plugin to Codex’s local plugin marketplace, and users then enable it in Codex. With direct tool listing turned on for your deployment, Hex’s 18 tools show up in Codex’s own tool list (Codex 0.122 or newer, installed through the Runlayer CLI).

    Codex setup guide
  3. 3

    Sign in to Hex

    Sign in the way Hex requires. Runlayer holds the credentials so they stay out of the client’s configuration.

  4. 4

    Use Hex from Codex

    Hex’s approved tools appear in Codex. Every call is checked against policy and recorded.

Tools

18 Hex tools in Codex

Runlayer policy decides which of these Codex users can call.

  • Continue thread

    Continue a Hex Thread by adding a new message and triggering the agent to process it.

  • Create cell

    Create a new cell in the draft version of a project.

  • Create project

    Create a new project in the workspace with the specified title, and optionally a description.

  • Create thread

    Create a new Hex Thread to ask a question about your data.

  • Delete cell

    Delete a cell from the draft version of a project by ID

  • Get cell

    Get a single cell by ID

  • Get cell image

    Get the rendered PNG image of a chart cell, returned as an image.

  • Get cell output

    Get the latest output preview for a SQL cell in the active draft notebook session.

See all 18 Hex tools

Control

What Runlayer can see and stop in Codex

Some controls apply to every client at the gateway. Others depend on what Codex exposes to Runlayer.

  • Gateway policy (available)

    Every Hex call from Codex passes through Runlayer, where your policies can allow, alert, mask, or block it.

  • Audit trail (available)

    Each call is recorded with the user, Codex as the client, the tool, and the policy and scanner decisions.

  • Client hooks (available)

    Capture supported prompts, reasoning, local and MCP tool calls, responses, and scanner decisions in real time.

  • Stop a call before it runs (available)

    Runlayer can deny a tool call or permission request before Codex runs it.

  • Block output after it runs (available)

    Runlayer can block a tool’s output before Codex’s model sees it.

  • Redact output in place (not available)

    Codex cannot take masked output, so Runlayer can block a tool’s output but not mask it. The gateway still applies policy to the call.

Frequently asked questions

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