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Connect Google BigQuery to Codex

Give Codex governed access to Google BigQuery’s 9 tools through Runlayer, with identity, policy, scanning, and audit on every call.

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Set up

Add Google BigQuery to Codex in four steps

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

  1. 1

    Approve Google BigQuery in Runlayer

    Add Google BigQuery 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, Google BigQuery’s 9 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 Google BigQuery

    Each user signs in to Google BigQuery with OAuth. Runlayer keeps the tokens out of the client’s configuration.

  4. 4

    Use Google BigQuery from Codex

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

Tools

9 Google BigQuery tools in Codex

Runlayer policy decides which of these Codex users can call.

  • Cancel job

    Cancel a running BigQuery job.

  • Execute SQL

    Run a SQL query in the project and return the result.

  • Execute SQL readonly

    Run a read-only SQL query in the project and return the result.

  • Get dataset info

    Get metadata information about a BigQuery dataset or BigLake namespace.

  • Get job

    Get information and status about a BigQuery job.

  • Get query results

    Get the results of a BigQuery SQL query job.

  • Get table info

    Get metadata information about a BigQuery table or BigLake table.

  • List dataset IDS

    List BigQuery dataset IDs and BigLake namespaces in a Google Cloud project.

See all 9 Google BigQuery 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 Google BigQuery 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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