Developer support

clock 1-minute read calender updated Dec. 09, 2025

Look up codes, get help, and stay updated

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FAQs

Have a question? Chances are someone else did too!

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Decoder

Quickly look up codes by API product or parameter name.

Decode the code

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Error handling

Discover how we format our error messages

How to read our errors

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Troubleshooting

Diagnose and resolve common issues by HTTP status code

Diagnose and resolve

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Support request

Contact the developer support team or request a working session. Only for KeyBank clients.

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Release notes

Easy-to-read summaries of the changes we have made to the developer portal for each release.

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Glossary

Look up industry terms, jargon, or acronyms found in the developer portal content.

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