Routing — What Are You Working On?
| If the user is asking about... | Read this reference |
|---|---|
| Authentication (X-Pay Token, Two-Way SSL, Mutual TLS) | references/vdp-integration.md |
| Message Level Encryption (MLE/JWE) | references/vdp-integration.md |
| Environment URLs (Sandbox, Cert, Production) | references/vdp-integration.md |
| Credential management & certificate rotation | references/vdp-integration.md |
| Code examples & starter kit (llms.txt) | references/vdp-integration.md |
| VIC workflows (card enrollment, purchase instructions) | references/visa-intelligent-commerce.md |
| VIC payment credentials & agent commerce | references/visa-intelligent-commerce.md |
| MPP card charge (HTTP 402, network tokens) | references/machine-payments-protocol.md |
| MPP Client/Server Enablers | references/machine-payments-protocol.md |
Quick Decision: Which Auth Method?
- X-Pay Token — Use for most integrations. Simpler setup, HMAC-based.
- Two-Way SSL (Mutual TLS) — Use when required by specific APIs or for higher-security environments.
Both are documented in references/vdp-integration.md.
Quick Decision: MCP vs Direct API?
- MCP-based — Building an AI agent or LLM-powered application? Use MCP (StreamableHTTP transport).
- Direct REST API — Traditional backend service? Use direct API calls with X-Pay auth + MLE.
Official Documentation Entry Points
| Resource | URL |
|---|---|
| Developer Center | https://developer.visa.com |
| VIC Capabilities | https://developer.visa.com/capabilities/visa-intelligent-commerce |
For all documentation links (auth guides, MLE guide, quick start), see references/vdp-integration.md.
Product-Specific Guides
Visa Intelligent Commerce (VIC)
For VIC integration (card enrollment, purchase instructions, payment credentials, agent commerce workflows), see:
references/visa-intelligent-commerce.md
Machine Payments Protocol (MPP)
For MPP card charge integration (HTTP 402 payment challenges, encrypted network token credentials, Client Enabler interface, receipts), see: