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Pools


Last updated Apr 16, 2026|Copy as Markdown|View as Markdown|Agent setup

OverviewPropertiesCreate poolsPer-endpoint Host header overrideAPI commands




Within Cloudflare, pools represent your endpoints and how they are organized. As such, a pool can be a group of several endpoints, or you could also have only one endpoint (an origin server, for example) per pool.

If you are familiar with DNS terminology, think of a pool as a “record set,” except Cloudflare only returns addresses that are considered healthy. You can attach health monitors to individual pools for customized monitoring. A pool can have either a single monitor or a monitor group attached — but not both.

For more details about how endpoints and pools become unhealthy, refer to Endpoint and pool health.


Caution


Since load balancing targets are not limited to origin web servers, the term endpoints has been introduced. Refer to Service-Specific Terms ↗ for its use in the context of Cloudflare offerings, and to load balancing concepts or Reference Architecture for use case examples.

On the Load Balancing API, origin has been maintained.



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Properties


For an up-to-date list of pool properties, refer to Pool properties in our API documentation.

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Create pools


For step-by-step guidance, refer to Create pools.

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Per-endpoint Host header override


When your application needs specialized routing (CNAME setup or custom hosts like Heroku), change the Host header used in health monitor requests. For more details, refer to Override HTTP Host headers.

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API commands


The Cloudflare API supports the following commands for pools. Examples are given for user-level endpoint but apply to the account-level endpoint as well.

Command	Method	Endpoint
Create Pool	POST	accounts/:account_id/load_balancers/pools
Delete Pool	DELETE	accounts/:account_id/load_balancers/pools/:id
List Pools	GET	accounts/:account_id/load_balancers/pools
Pool Details	GET	accounts/:account_id/load_balancers/pools/:id
Pool Health Details	GET	account/:account_id/load_balancers/pools/:id/health
Overwrite specific properties	PATCH	accounts/:account_id/load_balancers/pools/:id
Overwrite existing pool	PUT	accounts/:account_id/load_balancers/pools/:id
Preview Pool	POST	account/:account_id/load_balancers/pools/:id/preview
List Pool References	GET	accounts/:account_id/load_balancers/pools/:id/references

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