Verify Computer Use API Webhooks with HMAC Signatures
Build a secure webhook receiver that validates Coasty's HMAC signatures. You will be able to trust incoming task run events from the Computer Use API without leaking your webhook secret.
31 stories
Build a secure webhook receiver that validates Coasty's HMAC signatures. You will be able to trust incoming task run events from the Computer Use API without leaking your webhook secret.
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Secure your computer use agent responses using HMAC signatures. Build a verified webhook receiver that trusts only Coasty-signed payloads and handle 429 rate limits and 403 scope errors.
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Every webhook you receive from the Coasty Computer Use API is HMAC-signed. Learn how to decode the signature, validate the payload, and build a robust server that trusts only signed events. You will be able to enforce integrity for task runs, workflows, and machine events.
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Turn on signing, recompute the HMAC over the raw body, and reject anything that does not match. Plus what the signature does and does not protect.
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