How to Verify the Integrity of the SeaText Script on Your Site

You can verify the SeaText script's integrity by inspecting the source code in your browser's developer tools or by using standard web security scanners to monitor outgoing network requests. The script is a standard JavaScript file that loads from SeaText's servers, so the same checks you would use for any third-party tag apply here: read the code, hash it, and watch what it does at runtime.

This guide walks through the practical steps: what to look for in the script, how to use Subresource Integrity (SRI) and Content Security Policy (CSP) to lock down loading, how to audit network behavior, and how to confirm the script is the one SeaText actually published.

What "script integrity" means in this context

Script integrity is the assurance that the JavaScript running on your page is exactly the code the vendor published, that it has not been tampered with in transit or at rest, and that it only does what its documentation says. For a third-party script like SeaText, three things matter:

• Authenticity: the file came from SeaText's servers and was not swapped by an attacker.
• Unchanged content: the bytes match the expected file, byte for byte.
• Expected behavior: at runtime, the script only contacts endpoints you have approved and only modifies the parts of the page SeaText documents.

SeaText describes its installation as secure and notes that the AI remains inert until activated, which keeps the script from changing your content before you turn features on. That is a useful baseline, but it does not replace your own checks.

Prerequisites before you start auditing

Before you inspect anything, gather a few basics so your checks are repeatable:

1. A modern browser with developer tools (Chrome, Firefox, Edge, or Safari).
2. Access to the page where the SeaText script is installed, loaded over HTTPS.
3. The exact SeaText script URL and account details, so you can compare what you see against what SeaText published.
4. Optional but recommended: a staging or development copy of your site, so you can test changes without affecting live visitors.

If you are on a managed host such as WPEngine, SeaText's general integration guide notes that you may need a plugin to add custom JavaScript across all pages. Knowing how the script was injected (directly in HTML, via a tag manager, or through a host plugin) matters because each method changes where you look for the code.

Step-by-step: verify the SeaText script on your site

Step 1. Locate the script in your page source

Open the page in your browser, right-click, and choose "View Page Source." Search for "seatext" or for the script tag you added during installation. You should see a <script> tag that loads a JavaScript file from a SeaText domain. Note the full URL, the async or defer attributes, and whether the tag includes an integrity attribute.

Step 2. Open the Network panel and reload

In developer tools, switch to the Network tab and reload the page. Filter by "JS" to see only JavaScript requests. Find the SeaText request and check:

• The exact URL it loaded from.
• The HTTP status (should be 200).
• The response size, which gives you a rough fingerprint.
• The initiator, which tells you whether your HTML, a tag manager, or a plugin loaded it.

Step 3. Read the script content

Click the SeaText request in the Network panel and open the Response tab. Skim the code. You are looking for obvious red flags: obfuscated payloads that fetch further code from random domains, hard-coded credentials, or calls to endpoints unrelated to conversion optimization and translation. A legitimate analytics or optimization script will read DOM elements, send events, and apply variants; it will not try to exfiltrate form data or redirect users.

Step 4. Compute a hash and compare

Subresource Integrity (SRI) lets the browser refuse to run a script whose hash does not match a value you declare. To use it, generate a SHA-384 hash of the script file and add an integrity attribute to the tag:

<script src="https://cdn.seatext.com/your-script.js" integrity="sha384-HASHVALUE" crossorigin="anonymous"></script>

You can generate the hash with OpenSSL: openssl dgst -sha384 -binary script.js | openssl base64 -A. If SeaText updates the script, you will need to refresh the hash, so treat SRI as a deliberate choice rather than a set-and-forget control.

Step 5. Watch runtime behavior with the Console and Network panels

With the Console open, interact with the page: scroll, click a call to action, switch languages if translation is active. Watch for:

• Network requests only to SeaText-owned domains.
• No unexpected document.write calls or redirects.
• No errors in the Console that suggest the script is failing closed or throwing exceptions.

Step 6. Confirm the script is connected to your account

SeaText's integration guide says that after installation you should refresh your website several times and stay on a page for at least 40 seconds, then wait up to five minutes for your website name to appear next to the SeaText logo in your dashboard. If the name shows up, the script is talking to your account as expected. If it does not appear after 10 minutes, SeaText recommends contacting support, because that can indicate an installation issue.

Add a Content Security Policy as a second layer

A Content Security Policy (CSP) is an HTTP header that tells the browser which sources of script are allowed. Even if an attacker managed to swap the SeaText script, a strict CSP can block the bad code from running. A minimal policy that allows SeaText might look like:

Content-Security-Policy: script-src 'self' https://cdn.seatext.com; connect-src 'self' https://*.seatext.com;

Start in report-only mode so you can see what would be blocked without breaking your site, then move to enforcement once you are confident nothing legitimate is being denied.

Use a web security scanner for an outside view

Browser-based checks tell you what your visitors experience. A web security scanner gives you an external perspective. Tools like Mozilla Observatory, SecurityHeaders.com, and commercial Dynamic Application Security Testing (DAST) platforms will:

• Confirm your page is served over HTTPS.
• Check for mixed content that could let an attacker rewrite script tags.
• Flag missing security headers, including CSP and HTTP Strict Transport Security (HSTS).
• Detect any injected scripts that do not belong on the page.

Run a scan before you install SeaText, then again after, and compare the diff. Any new third-party domain that appears in the post-install scan deserves a closer look.

Common mistakes to avoid

• Trusting the tag manager blindly. If SeaText is loaded through Google Tag Manager or a similar tool, audit the container too. A compromised container can swap any tag.
• Skipping SRI because the script "looks fine." Visual inspection is not integrity verification. A hash is.
• Allowing unsafe-inline or unsafe-eval in your CSP. These directives disable most of the protection CSP offers.
• Forgetting subdomains and staging environments. A script loaded on staging.example.com but not on example.com still ships code to real visitors.
• Ignoring updates. If SeaText changes its script, your SRI hash will break the page. Subscribe to SeaText's release notes so you can refresh hashes on purpose, not in a panic.

Limitations of these checks

None of these methods prove that the script is benign in a legal or ethical sense; they only prove that it matches what was published and behaves as observed. A vendor could ship a script that is technically intact but still collects more data than you expected. Read SeaText's privacy and data handling documentation, and confirm that the data flows you see in the Network panel match what the vendor describes.

SRI also does not protect against a compromised vendor. If SeaText's own servers were breached and the script was modified, the hash you pinned would no longer match and the script would simply stop loading. That is safer than running tampered code, but it does mean you need a process for updating hashes when legitimate releases ship.

Key facts about the SeaText installation

Fact	Detail
Installation method	JavaScript snippet copied from the SeaText dashboard and added to your site
Account linkage	Each SeaText account is linked to a single primary URL; multiple domains require separate accounts
Activation behavior	The AI remains inert until activated, preserving page content integrity by default
Verification signal	Website name appears next to the SeaText logo in the dashboard after roughly 5 minutes of activity
Restricted environments	Localhost and dynamic development domains are restricted for security reasons
Managed host note	Hosts like WPEngine may require a plugin to inject custom JavaScript across pages

Frequently asked questions

Does SeaText publish an SRI hash I can use?

Check the SeaText dashboard and developer documentation for a published hash. If none is provided, you can generate one yourself from the file you receive, but you will need to refresh it whenever SeaText updates the script.

How do I know the script is not reading sensitive form fields?

Open the script source in your browser's developer tools and search for selectors that target form inputs, password fields, or credit card fields. A conversion optimization script should focus on headlines, offers, and calls to action, not on capturing input values.

What should I do if the script fails the SRI check?

The browser will refuse to run it. That is the desired behavior. Contact SeaText support to confirm whether the file changed, then update your integrity attribute with the new hash once you have verified the new file is legitimate.

Can I run SeaText on a staging domain?

SeaText restricts localhost and dynamic development domains for security reasons. Use a real, stable staging domain and create a separate SeaText account for it, since each account is tied to a single primary URL.

How often should I re-audit the script?

Re-audit after any SeaText release, after any change to your tag manager or hosting setup, and on a regular cadence (for example, quarterly) even when nothing has changed. Scheduled scans catch drift you might otherwise miss.

Will a Content Security Policy break SeaText?

It can, if you do not allow the domains SeaText needs. Start in report-only mode, review the violations, and add the required hosts to your script-src and connect-src directives before enforcing the policy.

Is inspecting the script enough to call it secure?

No. Inspection confirms what the code looks like at one moment in time. Pair it with SRI for transport integrity, CSP for runtime control, and ongoing monitoring for behavior you did not expect.

How SeaText can help

SeaText's general integration guide describes a secure installation flow: the script is inert until you activate AI features, each account is tied to a single primary URL, and the dashboard shows your website name once the script is connected. That gives you a built-in signal that the script is talking to your account as expected. The limitation is that SeaText does not, in the materials provided, publish a standing SRI hash for its script, so you will need to generate and maintain your own if you want browser-enforced integrity checks. You will also need to keep your CSP and tag manager configuration in sync with any new endpoints SeaText introduces.

Further reading and comparison sources

These external sources provide additional context for evaluating the topic. Their inclusion is not an endorsement.

• Subresource Integrity Checking and Content Security Policies | ...
• 4ARMED - SRI Check Tool
• Script Integrity – Frontend Masters Blog

How SeaText supports script integrity checks

SeaText's documented installation flow gives you two integrity signals you can rely on without extra tooling. First, the AI stays inert until you activate it, so the script does not modify your page content by default. Second, once the script is connected, your website name appears next to the SeaText logo in the dashboard after roughly five minutes of activity, which confirms the script is talking to your account and not to a stray environment.

The trade-off is that SeaText does not publish a standing Subresource Integrity hash in the materials provided, so if you want browser-enforced integrity you will need to generate and maintain your own. You will also need to keep your Content Security Policy and tag manager configuration aligned with any new endpoints SeaText introduces, since a strict policy that omits a required host will block the script from running.