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Showing content from https://cloud.google.com/nodejs/docs/reference/gcp-metadata/6.0.0/gcp-metadata/metadataaccessor below:

Package gcp-metadata (6.0.0) | Node.js client library

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BASE_PATH = "/computeMetadata/v1"

GCE_LINUX_BIOS_PATHS: {
    BIOS_DATE: string;
    BIOS_VENDOR: string;
}

Known paths unique to Google Compute Engine Linux instances

gcpResidencyCache: boolean | null

A cache for the detected GCP Residency.

HEADER_NAME = "Metadata-Flavor"

HEADERS: Readonly<{ "metadata-flavor":="" "google";="" }="">

HOST_ADDRESS = "http://169.254.169.254"

METADATA_SERVER_DETECTION: Readonly<{ 'assume-present':="" "don't="" try="" to="" ping="" the="" metadata="" server,="" but="" assume="" it's="" present";="" none:="" "don't="" try="" to="" ping="" the="" metadata="" server,="" but="" don't="" try="" to="" use="" it="" either";="" 'bios-only':="" "treat="" the="" result="" of="" a="" bios="" probe="" as="" canonical="" (don't="" fall="" back="" to="" pinging)";="" 'ping-only':="" "skip="" the="" bios="" probe,="" and="" go="" straight="" to="" pinging";="" }="">

Metadata server detection override options.

Available via process.env.METADATA_SERVER_DETECTION.

SECONDARY_HOST_ADDRESS = "http://metadata.google.internal."

export declare function detectGCPResidency(): boolean;

Determines if the process is running on Google Cloud Platform.

{boolean} true if the process is running on GCP, false otherwise.

export declare function getGCPResidency(): boolean;

Detects GCP Residency. Caches results to reduce costs for subsequent calls.

export declare function instance

Obtain metadata for the current GCE instance

export declare function isAvailable(): Promise

Determine if the metadata server is currently available.

export declare function isGoogleCloudServerless(): boolean;

Determines if the process is running on a Google Cloud Serverless environment (Cloud Run or Cloud Functions instance).

Uses the: - . - .

{boolean} true if the process is running on GCP serverless, false otherwise.

export declare function isGoogleComputeEngine(): boolean;

Determines if the process is running on a Google Compute Engine instance.

{boolean} true if the process is running on GCE, false otherwise.

export declare function isGoogleComputeEngineLinux(): boolean;

Determines if the process is running on a Linux Google Compute Engine instance.

{boolean} true if the process is running on Linux GCE, false otherwise.

export declare function isGoogleComputeEngineMACAddress(): boolean;

Determines if the process is running on a Google Compute Engine instance with a known MAC address.

{boolean} true if the process is running on GCE (as determined by MAC address), false otherwise.

export declare function project

Obtain metadata for the current GCP Project.

export declare function requestTimeout(): number;

Obtain the timeout for requests to the metadata server.

In certain environments and conditions requests can take longer than the default timeout to complete. This function will determine the appropriate timeout based on the environment.

{number} a request timeout duration in milliseconds.

export declare function resetIsAvailableCache(): void;

reset the memoized isAvailable() lookup.

export declare function setGCPResidency(value?: boolean | null): void;

Sets the detected GCP Residency. Useful for forcing metadata server detection behavior.

Set null to autodetect the environment (default behavior).

Except as otherwise noted, the content of this page is licensed under the Creative Commons Attribution 4.0 License, and code samples are licensed under the Apache 2.0 License. For details, see the Google Developers Site Policies. Java is a registered trademark of Oracle and/or its affiliates.

Last updated 2025-08-07 UTC.

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