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docs: use x402 v2 header names (PAYMENT-REQUIRED, PAYMENT-SIGNATURE, PAYMENT-RESPONSE)#650

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notorious-d-e-v:fix-x402-v2-header-names
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docs: use x402 v2 header names (PAYMENT-REQUIRED, PAYMENT-SIGNATURE, PAYMENT-RESPONSE)#650
notorious-d-e-v wants to merge 1 commit into
tempoxyz:mainfrom
notorious-d-e-v:fix-x402-v2-header-names

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@notorious-d-e-v
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The MPP vs x402 comparison page (added in #624) and the x402 upgrade guide reference x402 v1 legacy header names. x402 v2 dropped the X- prefix and renamed the credential header to PAYMENT-SIGNATURE. This updates both pages to the current spec.

v1 (legacy) v2 (current)
X-PAYMENT-REQUIRED PAYMENT-REQUIRED
X-PAYMENT PAYMENT-SIGNATURE
X-PAYMENT-RESPONSE PAYMENT-RESPONSE

…PAYMENT-RESPONSE)

The MPP vs x402 comparison and the x402 upgrade guide referenced the v1
legacy header names (X-PAYMENT-REQUIRED, X-PAYMENT, X-PAYMENT-RESPONSE).
x402 v2 dropped the X- prefix and renamed the credential header to
PAYMENT-SIGNATURE. Update both pages to match the current spec so the
side-by-side comparison and migration guide stay accurate.
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vercel Bot commented May 16, 2026

@notorious-d-e-v is attempting to deploy a commit to the Tempo Team on Vercel.

A member of the Team first needs to authorize it.

@github-actions github-actions Bot added the docs label May 16, 2026
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