> ## Documentation Index
> Fetch the complete documentation index at: https://infisical-devin-1781641701-docs-github-pat-fine-grained.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# Let's Encrypt

> Learn how to connect Infisical to Let's Encrypt to issue certificates.

## Concept

Infisical can connect to [Let's Encrypt](https://letsencrypt.org/) using the [ACME-compatible CA integration](/documentation/platform/pki/ca/acme-ca) to issue certificates back to your end-entities.

## Guide to Connecting Infisical to Let's Encrypt CA

To connect Infisical to Let's Encrypt, follow the steps in the [ACME-compatible CA integration](/documentation/platform/pki/ca/acme-ca) guide but use the Let's Encrypt **ACME Directory URL**: `https://acme-v02.api.letsencrypt.org/directory`.

Note that Let’s Encrypt issues 90-day certificates and enforces a limit of 50 certificates per registered domain per week.

We strongly recommend testing your setup against the Let's Encrypt staging environment first at the **ACME Directory URL** `https://acme-staging-v02.api.letsencrypt.org/directory` prior to switching to the production environment. This allows you to verify your DNS configuration and certificate issuance process without consuming production rate limits.

## What's Next

Now that your Let's Encrypt CA is configured, set up the infrastructure to issue certificates:

<CardGroup cols={2}>
  <Card title="Certificate Profiles" icon="file-certificate" href="/documentation/platform/pki/settings/profiles">
    Create a profile that references your Let's Encrypt CA.
  </Card>

  <Card title="Applications" icon="grid-2" href="/documentation/platform/pki/applications/overview">
    Create an Application, attach a profile, and configure enrollment.
  </Card>

  <Card title="Enrollment Methods" icon="arrow-right-to-arc" href="/documentation/platform/pki/applications/enrollment-methods/overview">
    Choose how certificates are requested — API, ACME, EST, or SCEP.
  </Card>

  <Card title="Quick Start" icon="rocket" href="/documentation/platform/pki/quick-starts/issue-first-certificate">
    Issue your first certificate end-to-end.
  </Card>
</CardGroup>