CheckAlt API Documentation

Locate detailed documentation for using CheckAlt's APIs in the links below.

Card API Documentation

Credit & Debit Card Transactions

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Consumer RDC API Documentation

RDC Check 21 Transactions

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Merchant RDC API Documentation

RDC Check 21 Transactions

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ACH API Documentation

ACH Payments

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Lockbox API Documentation

Lockbox Transactions

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View Instructions >