Google Cloud OS Login API

Name: Cloud OS Login API
Brand: Cloud OS Login API
Availability: InStock

✓ Official Vendor SpecIdentity AuthDirectory Servicesoauth26 EndpointsREST

Install Jentic One Beta

Connect the Cloud OS Login API to your agent

Jentic One is a self-hosted execution layer for AI agents. It lets your agent call the Cloud OS Login API, or any other public or private API you need. You set the rules, the agent never sees your credentials, and every call is logged.

Two steps, two machines. Install the instance in a safe environment, then register your agent from wherever it runs.

Step 1: Jentic One Host machine

# On the machine that will host your Jentic One instance:
curl -fsSL https://raw.githubusercontent.com/jentic/jentic-one/main/tools/install.sh | sh

Step 2: Agent machine

# On the machine where your agent runs (keep this separate from the instance):
curl -fsSL https://raw.githubusercontent.com/jentic/jentic-one/main/tools/install.sh | sh
jentic register       # connects your agent to your Jentic One instance

Jentic One is in public beta. The setup above keeps your agent separate from the instance, which is what you want before using real credentials: an agent running as the same OS user as Jentic One can read its stored keys directly. Just evaluating? A single local install is fine to start. See the secure deployment guide for the tiers.

Capabilities

What an agent can do with Cloud OS Login API.

Read a user's OS Login profile including POSIX username, UID, and home directory

Import a new SSH public key for an authenticated Google identity

Delete an SSH public key when an employee leaves or rotates credentials

GET STARTED

Start building with Cloud OS Login API

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View OpenAPI Document

For Agents

Manage SSH key bindings and POSIX login profiles for Google Cloud users so VM access flows through IAM rather than per-host key files.

Use for: Get the OS Login profile for the authenticated Google user, Import a new SSH public key for a user who is onboarding, Delete an SSH key that has been compromised, Update the expiry of an SSH public key

Not supported: Does not authenticate SSH sessions, manage VM metadata, or create user accounts - use for SSH key bindings and POSIX login profile reads only.

Use Cases

Patterns agents use Cloud OS Login API for, with concrete tasks.

★ Centralised SSH key lifecycle

Replace per-VM SSH key files with IAM-driven access by importing each engineer's public key once via OS Login. The API binds the key to a Google identity, and every VM with OS Login enabled accepts it automatically. Removing a key removes access fleet-wide - a single source of truth for SSH access management.

Import a new SSH public key for user alice@example.com via POST /v1/{+parent}:importSshPublicKey and confirm by listing the keys on her login profile.

Rapid revocation on offboarding

When an engineer leaves, delete their SSH public keys via OS Login to revoke access from every VM that uses OS Login at once. The alternative - pruning authorized_keys files VM by VM - is slow and error-prone. This use case turns access revocation into a single API call instead of an audit project.

List all SSH public keys for user bob@example.com via GET /v1/{+name}/loginProfile and DELETE /v1/{+name} for each fingerprint to revoke fleet access.

Short-lived SSH keys for engineers

Issue short-lived SSH public keys that expire after a defined interval, and let the OS Login API enforce the expiry across the fleet. The expirationTimeUsec field on imported keys means an automation can mint a key valid for a few hours, ship it to the engineer's local agent, and never need to remember to revoke it.

Import an SSH public key for user alice@example.com with expirationTimeUsec set to 4 hours from now via POST /v1/{+parent}:importSshPublicKey.

Agent-driven SSH access management via Jentic

An access agent reacting to a JIT request - for example, an engineer asking for VM access via Slack - can use Jentic to import a key with the correct expiry and reply with the VM hostname. Credentials stay in your Jentic One instance, so the agent runs under scoped admin tokens with audit trail.

Use Jentic to find the import-ssh-key operation, load its schema, and import a public key for the requesting user with a 60-minute expiry.

Key Endpoints

6 endpoints — the cloud os login api manages ssh access to google compute engine vms through iam identities rather than per-vm key files.

METHOD

PATH

DESCRIPTION

GET

/v1/{+name}/loginProfile

Get the user's OS Login profile

POST

/v1/{+parent}:importSshPublicKey

Import an SSH public key

POST

/v1/{+parent}/sshPublicKeys

Create an SSH public key entry

PATCH

/v1/{+name}

Update an SSH public key's metadata

DELETE

/v1/{+name}

Delete an SSH public key

GET

/v1/{+name}/loginProfile

Get the user's OS Login profile

POST

/v1/{+parent}:importSshPublicKey

Import an SSH public key

POST

/v1/{+parent}/sshPublicKeys

Create an SSH public key entry

PATCH

/v1/{+name}

Update an SSH public key's metadata

DELETE

/v1/{+name}

Delete an SSH public key

Why Jentic?

Three things that make agents converge on Jentic-routed access.

Credential isolation

Your Google OAuth credential for the Cloud OS Login API is stored once, encrypted, by your own Jentic One instance and injected at execution time. It never enters the agent's prompt, logs, or context.

Intent-based discovery

Agents search Jentic by intent such as 'import an SSH key' or 'read a POSIX login profile', and Jentic returns the matching OS Login operation with its input schema so the agent calls the right endpoint without browsing the reference docs.

Time to first call

FAQs

Specific to using Cloud OS Login API through Jentic.

What authentication does the Cloud OS Login API use?

The API uses Google OAuth 2.0 with the cloud-platform or compute scope, plus the relevant OS Login admin or self-management role. Through Jentic, tokens come from a service account in your Jentic One instance.

Can I delete an SSH key for a user who has left?

Yes. List the user's keys via GET /v1/{+name}/loginProfile, then DELETE /v1/{+name} for each public key fingerprint. The change propagates to every VM that uses OS Login.

What are the rate limits for the OS Login API?

Google Cloud meters profile reads and key writes under per-project quotas. Bulk imports should batch and back off; treat key propagation to VMs as eventually consistent in the order of seconds.

How do I import an SSH key through Jentic?

Search Jentic for import ssh public key, load the schema for POST /v1/{+parent}:importSshPublicKey, and execute it with the public key and an optional expirationTimeUsec. Jentic returns the resulting profile so the agent can confirm the binding.

Does this API authenticate the SSH session itself?

No - actual SSH authentication happens on each VM by the OS Login PAM module, which validates the inbound key against this API's bindings. This API only stores the bindings and profile data.

How do I find a user's POSIX username?

Call GET /v1/{+name}/loginProfile with the user resource name and read the posixAccounts field; each entry includes the username and UID assigned for OS Login.

Can I limit what my agent is allowed to do with the Cloud OS Login API?

Yes. Because Jentic One is self-hosted, your own rules decide which operations and credentials the agent may use, and the Cloud OS Login API carries the profile and key in the URL path, so you can pin the agent to a single login profile and let it read that profile and import SSH keys there and nothing else. You choose the operations it may call, so destructive ones such as deleting an SSH public key stay out of reach unless you explicitly add them. The Google OAuth credential is stored once by your own instance and injected at execution time, never entering the agent's prompt or logs.

Google Cloud OS Login API

Connect the Cloud OS Login API to your agent

Capabilities

Start building with Cloud OS Login API

Use Cases

Key Endpoints

Why Jentic?

Related APIs

FAQs