`invalid_exact_evm_token_version_mismatch`

The token version in the quote is not the version the token contract reports.


Reported by	the facilitator, during verify
Usually fixed by	the seller

Cause

The transfer simulation failed, and the token contract's on-chain version() differs from extra.version in the payment requirements.

Fix

Seller: set extra.version to the token's on-chain version. For USDC on Base and Base Sepolia it is 2.

About this reference

Causes are taken from the source of @x402/evm 2.31. Other facilitators and later versions may use the same code for slightly different checks. See all x402 errors.