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AB-032
Payment Required Header
What it means
Your payment responses include a header that tells agents payment is needed.
Why it matters
This header is the universal signal for 'payment required'. Without it, agents don't know to look for payment details.
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What's wrong
No payment header. Agents don't realize they need to pay.
✓
What's right
Payment header clearly signals that payment is required.
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Enter your URL to check just this one rule (AB-001).