SDKs
Three official server-side SDKs ship with OID4Pay. Each is a thin wrapper over the wire shapes in the wire reference. All three pass the same RFC 9421, SD-JWT VC, and DPoP conformance harness.
- Node / TypeScript:
@oid4pay/oid4ac-merchant - Python:
oid4pay-oid4ac - Go:
github.com/oid4pay/oid4ac-go - CDN bundle:
@oid4pay/cdn-oid4ac-merchant - MCP server:
oid4pay-mcp - Node merchant:
@oid4pay/oid4ac-merchant
For browser-side use the CDN bundle is at cdn.oid4pay.com/oid4ac-merchant/v1/loader.js. See the quickstart for the one-line storefront drop-in.