Get your partner sandbox credentials
The Developer MCP uses your partner sandbox account to authenticate. If you already have sandbox access, you're ready to configure.
Create a partner sandbox account at the Visa Acceptance Developer Center. Select your integration type (Hosted, Embedded, or Full API) during signup.
1
1
Sign in to the Business Center to retrieve your sandbox merchant ID (MID) and API credentials from the Key Management section.
2
Keep your credentials ready. You'll reference them in your IDE when the MCP prompts for authentication. No hardcoded secrets required.
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Create sandbox account →
Get credentials
STEP 1
Configure your IDE
STEP 2
Start building
STEP 3