AWS Amazon EC2 Auto Scaling

Name: Amazon EC2 Auto Scaling API
Brand: Amazon EC2 Auto Scaling
Availability: InStock

★ Only Publicly Available OpenAPI DocumentCloud InfrastructureComputeapiKey130 Endpoints

Install Jentic One Beta

Connect the Amazon EC2 Auto Scaling to your agent

Jentic One is a self-hosted execution layer for AI agents. It lets your agent call the Amazon EC2 Auto Scaling, 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 Amazon EC2 Auto Scaling API.

Create Auto Scaling groups bound to a launch template, with min/max/desired capacity across one or more Availability Zones

Attach Application Load Balancer target groups and Classic Load Balancers to an Auto Scaling group so new instances receive traffic automatically

Configure target tracking, step, and simple scaling policies driven by CloudWatch metrics such as CPU utilisation or request count

GET STARTED

Start building with Amazon EC2 Auto Scaling API

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View OpenAPI Document

For Agents

Create and manage EC2 Auto Scaling groups, scaling policies, scheduled actions, and lifecycle hooks so an agent can keep an EC2 fleet sized to demand and replace unhealthy instances automatically.

Use for: I need to create an Auto Scaling group for my web fleet, Set up a target tracking policy that holds CPU at 50 percent, Attach an Application Load Balancer target group to my Auto Scaling group, Schedule the fleet to scale up before Monday morning peak

Not supported: Does not provision EC2 instances directly, manage Kubernetes node pools, or scale ECS services. Use for EC2 Auto Scaling group capacity management only.

Use Cases

Patterns agents use Amazon EC2 Auto Scaling API for, with concrete tasks.

★ Demand-Based Web Fleet Scaling

Run a stateless web tier that grows and shrinks with traffic. Define an Auto Scaling group bound to a launch template, attach an Application Load Balancer target group, and add a target tracking policy that holds average CPU at 50 percent. EC2 Auto Scaling adds instances when demand rises, removes them when it falls, and replaces any that fail an EC2 or ELB health check. Initial setup takes a few hours including launch template, IAM role, and ALB wiring.

Create an Auto Scaling group named web-prod with min 2, desired 4, max 20 across three AZs, attach target group arn:aws:elasticloadbalancing:..., and add a target tracking policy keeping ASGAverageCPUUtilization at 50.

Scheduled Capacity for Predictable Traffic

Pre-warm capacity before a known traffic spike, such as Monday 9am, an end-of-month batch run, or a scheduled marketing send, without paying for unused instances overnight. Use PutScheduledUpdateGroupAction to set min, max, and desired capacity at specific times in cron-style schedules. EC2 Auto Scaling adjusts the group at the scheduled time and lets the regular scaling policies take over once load arrives.

Create a scheduled action on Auto Scaling group web-prod that sets min=10, desired=15 every weekday at 08:30 UTC and reverts to min=2, desired=4 at 19:00 UTC.

Rolling AMI Rollout with Instance Refresh

Deploy a new AMI or launch template version across an Auto Scaling group without manually cycling instances. StartInstanceRefresh replaces instances in batches with a configurable minimum healthy percentage and warm-up period, pausing if health checks fail. Suitable for OS patching, agent upgrades, or rolling out a new application version on long-lived instances.

Update the launch template for web-prod to AMI ami-0abc123, then call StartInstanceRefresh with MinHealthyPercentage=90 and InstanceWarmup=300, polling DescribeInstanceRefreshes until status is Successful.

Agent-Driven Capacity Operator

Give an AI ops agent the ability to react to sustained load anomalies that fall outside static scaling policies, such as a sudden viral mention, an unusual customer cohort, or an upstream incident draining capacity. The agent calls EC2 Auto Scaling through Jentic to inspect group state, adjust desired capacity within configured bounds, kick off an instance refresh, or temporarily suspend scaling during an incident, all behind Jentic-managed AWS credentials so the human operator never hands a long-lived secret to the agent.

Search Jentic for 'set desired capacity on an auto scaling group', load the SetDesiredCapacity schema, and execute it on web-prod with desired=12 after confirming current CPU > 80 percent for 10 minutes.

Key Endpoints

130 endpoints — amazon ec2 auto scaling launches and terminates ec2 instances automatically in response to demand, scheduled actions, and instance health checks.

METHOD

PATH

DESCRIPTION

POST

/#Action=CreateAutoScalingGroup

Create an Auto Scaling group

POST

/#Action=UpdateAutoScalingGroup

Update group capacity, AZs, or launch template

POST

/#Action=DescribeAutoScalingGroups

List Auto Scaling groups and their state

POST

/#Action=SetDesiredCapacity

Set the desired capacity on a group

POST

/#Action=PutScalingPolicy

Create or update a scaling policy

POST

/#Action=PutScheduledUpdateGroupAction

Schedule a capacity change

POST

/#Action=StartInstanceRefresh

Roll out a new launch template version

POST

/#Action=AttachLoadBalancerTargetGroups

Attach ALB/NLB target groups to a group

POST

/#Action=CreateAutoScalingGroup

Create an Auto Scaling group

POST

/#Action=UpdateAutoScalingGroup

Update group capacity, AZs, or launch template

POST

/#Action=DescribeAutoScalingGroups

List Auto Scaling groups and their state

POST

/#Action=SetDesiredCapacity

Set the desired capacity on a group

POST

/#Action=PutScalingPolicy

Create or update a scaling policy

Why Jentic?

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

Credential isolation

Your AWS access key for Amazon EC2 Auto Scaling is stored once, encrypted, by your own Jentic One instance and signed with SigV4 at execution time. It never enters the agent's prompt, logs, or context.

Intent-based discovery

Agents search Jentic by intent such as 'create an auto scaling group' or 'set the desired capacity on a group', and Jentic returns the matching Amazon EC2 Auto Scaling operation with its input schema so the agent calls the right endpoint without browsing the AWS service reference.

Time to first call

FAQs

Specific to using Amazon EC2 Auto Scaling API through Jentic.

What authentication does the Amazon EC2 Auto Scaling API use?

All requests are signed with AWS Signature Version 4 using an AWS access key ID and secret access key, sent in the Authorization header. Through Jentic, those credentials are stored encrypted in the vault and signing happens server-side, so the agent only ever sees a scoped Jentic credential reference.

Can I attach an Application Load Balancer to an Auto Scaling group with this API?

Yes. Use AttachLoadBalancerTargetGroups for ALB and NLB target groups, or AttachLoadBalancers for Classic Load Balancers. Once attached, instances launched by the group are registered with the target group automatically and removed on termination.

What are the rate limits for the Amazon EC2 Auto Scaling API?

EC2 Auto Scaling uses standard AWS service quotas, not a published per-second limit. Requests can be throttled with a Throttling error, and DescribeAutoScalingGroups in particular has lower quotas than mutating actions. Jentic respects the documented exponential-backoff guidance from AWS when retrying.

How do I roll out a new launch template version to an existing Auto Scaling group through Jentic?

Update the group's launch template version with UpdateAutoScalingGroup, then call StartInstanceRefresh with a MinHealthyPercentage and InstanceWarmup that match your tolerance. Through Jentic, search for 'roll out new launch template' and execute the returned operation; Jentic returns the refresh ID so the agent can poll DescribeInstanceRefreshes.

Does EC2 Auto Scaling work with EC2 Spot instances?

Yes. Mixed instance policies on the Auto Scaling group let you combine On-Demand and Spot capacity with allocation strategies like price-capacity-optimized. Configure this through the group's MixedInstancesPolicy when calling CreateAutoScalingGroup or UpdateAutoScalingGroup.

How is Amazon EC2 Auto Scaling priced?

EC2 Auto Scaling itself is free to use; you pay only for the EC2 instances, EBS volumes, CloudWatch alarms, and Elastic Load Balancing capacity it manages on your behalf.

Can I limit what my agent is allowed to do with the Amazon EC2 Auto Scaling API?

Yes. Because you self-host Jentic One, your own rules decide which operations and credentials the agent may use, so you can allow only what it needs, such as DescribeAutoScalingGroups, CreateAutoScalingGroup, or SetDesiredCapacity. Amazon EC2 Auto Scaling names the target group in the request body rather than the URL path, so scoping is done by the set of operations you grant rather than by path patterns. Destructive actions like deleting a group or calling StartInstanceRefresh stay out of the agent's reach unless you explicitly add them, and the AWS access key is signed at execution time so it never reaches the agent.

AWS Amazon EC2 Auto Scaling

Connect the Amazon EC2 Auto Scaling to your agent

Capabilities

Start building with Amazon EC2 Auto Scaling API

Use Cases

Key Endpoints

Why Jentic?

Related APIs

FAQs