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A 401 in Pabbly Connect means a request was not authorized, but first identify which request returned it: the screenshot service’s API call, or the website loaded for the screenshot. The right fix depends on the screenshot provider and its documented authentication method. Check the failed step’s response before changing credentials or headers.
Identify which request returned 401
Open the failed workflow execution in Pabbly Connect and inspect the action’s HTTP status, response body, and relevant response headers. Redact API keys, bearer tokens, cookies, and other secrets before sharing logs.
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A screenshot workflow involves two distinct systems: Pabbly sends a request to the screenshot service, and that service loads the target website. A 401 response from the API call can indicate that the screenshot service rejected the credential. If the API call succeeded but the image shows a login or unauthorized page, the target website may have required its own authentication. A credential for the screenshot API does not automatically authenticate you to the website being captured.
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Match Pabbly’s authentication settings to the provider
Check the current API reference for the screenshot provider you are calling. Confirm the required authentication scheme and the exact location for the credential. Do not assume that Authorization: Bearer is accepted by every screenshot API.
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Pabbly documents options that include Basic Auth, Bearer Token, and parameter-based authentication, along with request headers and parameters. Its inbuilt action guidance also covers the HTTP method, endpoint, request body type, headers, and body or query parameters. For Bearer Token authentication, Pabbly says it creates a Token field in the connection area.
- In the failed Pabbly action, locate its authentication or connection settings.
- Choose the scheme required by the screenshot provider: for example, Bearer Token, Basic Auth, or a documented parameter-based method.
- Enter the credential in the exact field or header required by that provider. If the provider requires a custom header, add it under request headers; if it requires a query parameter, use the appropriate parameter field.
- Compare the request method, destination endpoint, body type, headers, and parameters with the provider’s current API reference.
- Run a fresh test and inspect the response returned by the action.
Check the API key and request details
- Confirm the key is present and copied in full, with no accidental whitespace.
- Make sure it belongs to the account or project whose screenshot service endpoint you are calling.
- Check the provider’s dashboard or documentation for whether the key has been revoked or disabled.
- Verify that the destination hostname and endpoint belong to the screenshot service—not the URL you want the service to capture.
- Ensure the request fields and authentication format match the provider’s documented requirements. A credential in the wrong header or parameter may be treated as missing.
For example, Screenshot API at screenshot-api.org documents API-key authentication using a Bearer authorization header, an X-API-Key header, or a query parameter, and says a missing or invalid key returns 401. Those options apply to that service only. The separate service at screenshot-api.net documents Bearer authentication and lists missing, invalid, or revoked keys as 401 causes. These examples are not interchangeable instructions: use the reference for the provider configured in your workflow.
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If the API succeeds but the screenshot shows an error page
Check the screenshot action’s response status and metadata to determine whether the screenshot service accepted the request. If it did, investigate access to the target website separately. The site may require a login, block automated access, or return an authentication page. Consult the screenshot provider’s guidance for passing cookies or other page credentials, and only share those credentials through a secure workflow configuration. Do not paste secrets into logs or public support posts.
Common 401 troubleshooting cases
| What you see | What to check |
|---|---|
| The screenshot API response says the key is missing or invalid | Confirm the credential is present, complete, current, and sent in the provider’s required location. |
| The key is in an Authorization header, but the request still returns 401 | Check whether the provider requires another scheme, a custom header, or a query parameter instead. |
| The workflow action points to an unexpected URL | Verify the screenshot service hostname and endpoint separately from the target page URL. |
| The API call succeeds, but the image contains a login or unauthorized page | Check the target website’s access requirements; the screenshot API credential and site credentials serve different purposes. |
| The response does not make the cause clear | Keep the status, response body, and relevant headers, redact secrets, and compare them with the provider’s current troubleshooting guidance. |
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Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Frequently Asked Questions
What should I include when asking for help with a Pabbly 401?
Share the screenshot provider’s name and the failed action’s status and response, with API keys, tokens, cookies, and other secrets removed.
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Does a 401 always mean the screenshot API key is wrong?
No. It can reflect an authentication failure at a different layer, so inspect the API response and distinguish it from an error page returned by the target website.
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