A 401 from APITemplate.io usually means the API key being sent is incorrect. First copy the intended key from the APITemplate console’s API Integration area, then inspect the actual outgoing request to confirm it contains the populated X-API-KEY header. Also verify whether you need a team key and whether the request is using the endpoint for the API version and region you intend.
What an APITemplate.io 401 means
APITemplate.io’s API Reference error table describes 401 as “Unauthorized — Your API key is wrong.” The wording appears in its older v1 reference; current setup documentation still shows the API key being sent in an X-API-KEY header. A 401 is therefore a reason to check authentication first, not to change rate limits or retry blindly.
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A 429 is different: APITemplate documents it as a rate-limit response. If your response is 429 rather than 401, follow rate-limit guidance in the current REST API documentation instead of treating it as a bad-key error.
Fix the key and header first
- Copy the intended key. Sign in to the APITemplate console and open API Integration. Copy the key directly rather than retyping it. Personal and team keys are separate, so select the key associated with the team or account that owns the integration.
- Inspect the request that actually ran. Check the outgoing HTTP request, SDK configuration, proxy configuration, or workflow execution data—not only the value shown in an editor. The documented current header is
X-API-KEY: YOUR_API_KEY. - Confirm the runtime value is present. Look for an empty or stale environment variable, a copied placeholder such as
YOUR_API_KEY, whitespace introduced during secret handling, or a different key than the one you just copied. Do not expose the real key in logs or source control. - Check endpoint version and region. Current REST documentation illustrates regional v2 endpoints, while older v1 examples use
api.apitemplate.io. Use the endpoint expected for your API version and integration rather than copying a legacy URL into a current setup. The vendor’s API troubleshooting guidance also advises checking the regional endpoint. - Run one controlled request. After correcting the credential or endpoint, make a single request and inspect its response status and headers. If the response remains 401, capture the method, endpoint, and redacted headers for support.
Set the API key in n8n
APITemplate.io’s n8n integration guide uses Header Auth with the header name X-API-KEY and your actual API key as the value. Create or select that credential, then attach it to the HTTP Request node that makes the APITemplate call.
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- Open the HTTP Request node and find its authentication or credential setting.
- Choose the Header Auth credential type and enter
X-API-KEYas the header name. - Set the value to the API key from the correct APITemplate personal or team scope; do not leave a placeholder in the credential.
- Ensure the credential is attached to the node that executes the request, then run the workflow and inspect the execution output for the response status.
Use n8n’s credential storage rather than pasting a secret into a public workflow export or a logged request. The exact placement of credential controls can vary by n8n version; APITemplate’s integration instructions are at APITemplate.io’s n8n guide.
Which authentication header should you use?
| Header form | When to use it |
|---|---|
X-API-KEY: YOUR_API_KEY |
Use this as the starting point: it is the pattern in APITemplate’s current key-management and setup instructions. |
Authorization: Token YOUR_API_KEY |
The API reference documents this as an alternative. Use it only when your client or integration is deliberately configured for this form. |
Do not add both headers just in case. Check which header the client is configured to send and align it with the APITemplate integration instructions. The alternative form is documented in the API reference.
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Rotate a key if it may have been exposed
If the key was committed to source control, shared in an unredacted log, or otherwise exposed, regenerate it from the API Integration area and replace it in the application’s secret configuration. A rotated key will not help until the application is updated to send the new value. APITemplate’s security policy says API logs are retained for up to 14 days and can be disabled in API Integration; it does not establish that individual entries can be selectively erased.
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- Re-copy the credential and check that it belongs to the right personal or team scope.
- Inspect the final runtime request for a missing header, an empty value, a placeholder, or an old secret injected by a deployment environment.
- Confirm that the endpoint matches the intended API version and region; current v2 and legacy v1 examples are not interchangeable by default.
- Check the returned status precisely. APITemplate lists 429 for rate limiting, which requires a different fix.
- Consult the current API documentation, contact [email protected], or check status.apitemplate.io. Include the status code, request method, endpoint/version, and redacted headers—but never send the API key itself. Support details are on the APITemplate.io support page.
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Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Frequently Asked Questions
Can APITemplate.io return 401 because of rate limiting?
APITemplate documents rate limiting as HTTP 429, not 401. A 401 calls for checking the credential and authentication header.
Should I send both X-API-KEY and Authorization: Token?
No. Choose the header form configured for your client; current setup instructions use X-API-KEY.
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