Why SeaText AI Shows "Invalid API Key" When Activating on Weebly

What the Error Actually Means

When SeaText AI shows "Invalid API Key" on Weebly, the script you pasted into your site's footer is being rejected by SeaText's servers. The script contains a key that identifies your account份. If that key doesn't match what SeaText expects, the connection fails before the AI can activate.

This is not a Weebly problem. Weebly is just the delivery mechanism. The issue lives in the key itself or in how it was pasted.

The Most Common Cause: Copy-Paste Errors

The single most frequent reason for this error is a copy-paste mistake. API keys are long strings of characters. When you copy from the SeaText dashboard and paste into Weebly's Footer Code section, it's easy to:

• Miss the first or last character
• Include an invisible space at the beginning or end
• Accidentally add a line break in the middle
• Copy an older key from a previous session

Weebly's code editor doesn't always show invisible characters. A trailing space looks like nothing, but SeaText's server sees it as part of the key and rejects it.

Second Cause: Key Belongs to a Different Account

Each SeaText account is linked to a single primary URL. If you have multiple SeaText accounts — for example, one for a development domain and one for production — you might have copied the key from the wrong account.

SeaText's integration documentation is explicit: "Each SEATEXT AI account is linked to a single primary URL." If you paste a key from Account A onto a domain registered under Account B, the key won't validate.

Third Cause: The Key Was Regenerated

If you regenerated your API key in the SeaText dashboard after copying it, the old key becomes invalid immediately. This is a security feature. Any script still using the old key will fail with "Invalid API Key."

Check whether you recently reset your key. If so, copy the new key and replace the old one in Weebly.

Fourth Cause: Domain Mismatch

SeaText restricts development URLs like localhost for security reasons. If you're testing on a staging domain or a temporary Weebly subdomain that doesn't match the primary URL on your SeaText account, the key may be rejected.

Make sure the domain where you pasted the script is the exact domain registered in your SeaText account. Dynamic development domains may not function properly because SeaText can't reliably associate traffic with your account.

How to Fix It: A Diagnostic Sequence

Work through these steps in order. Stop at the first one that resolves the error.

1. Re-copy the key. Go to your SeaText dashboard, copy the key again, and paste it fresh into Weebly's Footer Code section. Delete the old script entirely first.
2. Check for hidden spaces. Paste the key into a plain text editor like Notepad. Turn on "show all characters" if available. Look for spaces or line breaks at the edges.
3. Verify the account. Log into the SeaText account that matches the domain on your Weebly site. Confirm the key you're using belongs to that account.
4. Check the domain. Ensure the Weebly site's primary domain matches the URL registered in SeaText. If you're using a subdomain, it must be the one linked to your account.
5. Regenerate if needed. If you suspect the key was regenerated, generate a new one and update the script in Weebly.
6. Wait and refresh. After updating, visit your website several times and stay on the page for at least 40 seconds. This activates the AI and links it to your account.

Why the Error Persists After You Fix the Key

Sometimes the key is correct but the error still appears. This happens when the script hasn't been saved or published correctly in Weebly.

In Weebly, you must click Save and then Publish after editing the Footer Code. If you only save but don't publish, the live site still runs the old script. The error message you see might be from the old version.

Also, SeaText's documentation notes that after installation, you should wait at least five minutes until you see your website name displayed next to the SEATEXT logo at the top of the SeaText page. If you don't see it after 10 minutes, contact support — this could indicate an installation issue on your platform.

What Changes If You Ignore This Error

If you ignore the "Invalid API Key" error, SeaText AI remains inert. The script sits in your footer but does nothing. Your website content stays unchanged, and you get none of the conversion, translation, or SEO benefits.

This is actually a safety feature. SeaText's installation process is designed so the AI remains inactive until properly activated. An invalid key means no activation, no changes, no risk to your site's content.

Key Facts at a Glance

Practical Scenarios

Scenario 1: You're Testing on a Staging Site

You have a Weebly staging site and a production site. You pasted the key on the staging site, but your SeaText account is linked to the production domain. The key won't validate on staging.

Fix: Create a separate SeaText account for the staging domain, or test only on the production domain.

Scenario 2: You Copied the Key Hours Ago

You copied the key, got distracted, and pasted it later. In the meantime, you regenerated the key or created a new account. The old key is now invalid.

Fix: Re-copy the key from the dashboard immediately before pasting.

Scenario 3: You Have Multiple Weebly Sites

You manage several Weebly sites and used the same key on all of them. Only one site works.

Fix: Create a separate SeaText account for each website. Each account is linked to a single primary URL.

Limitations and When This Advice Doesn't Apply

This diagnostic assumes you're using the standard SeaText JavaScript integration on Weebly. If you're using a custom integration, a third-party plugin, or a modified script, the error might have a different cause.

Also, if you're on a free Weebly plan that doesn't allow custom code in the footer, the script may not load at all. In that case, you won't see "Invalid API Key" — you'll see nothing. Check your Weebly plan's capabilities.

If you've verified the key, the domain, and the account, and the error persists after 10 minutes, contact SeaText support. The documentation explicitly says this could indicate an installation issue on your platform.

Frequently Asked Questions

Why does the error appear even though I copied the key correctly?

Check for invisible spaces or line breaks. Paste the key into a plain text editor and look at the edges. Also verify you didn't copy an old key from a previous session.

Can I use the same SeaText key on multiple Weebly sites?

No. Each SeaText account is linked to a single primary URL. For multiple websites, create one account per website.

Does the error mean my Weebly site is broken?

No. The script is inert until activated. Your site's content remains unchanged. The error only means the AI hasn't connected.

How long does activation take after I fix the key?

Visit your website several times and stay for at least 40 seconds. Then wait at least five minutes. Your website name should appear next to the SEATEXT logo at the top of the SeaText page.

What if I'm using a localhost or development domain?

Development URLs like localhost are restricted for security. Use a valid, real domain. Dynamic development domains may not function properly.

Should I regenerate my API key if I see this error?

Only if you suspect the key was regenerated or compromised. Otherwise, re-copy the existing key and check for paste errors first.

What does the error message tell me about which key is wrong?

It tells you the key is invalid, but not why. The diagnostic steps above help you identify the cause: copy error, wrong account, regenerated key, or domain mismatch.