Cashfree SDK & API Changelog (Breaking Changes & Release Notes)

Look up the version timeline table for your SDK in the relevant reference file and check every row marked Breaking between your current and target versions. Each breaking entry lists exactly what changed, what to fix in your code, and what to test.

The 2023-08-01 version changed Cashfree IDs from integers to strings, dropped the refund_ prefix from cf_refund_id, removed payments/refunds/settlements URLs from the order entity, dropped notify_url from Create Order, and added Customer, Order Termination, and SPOS APIs.

No. All current major SDK versions (v5+/v6 for Node, Python, Java, Go, PHP, and .NET) use an instance-constructor style where you build a client with credentials and call methods without a leading version argument. The version-first call style is the pre-v5 legacy pattern.

The .NET SDK git repository has tags up to 6.0.7, but nothing in the 6.x line was published to NuGet, which tops out at 5.0.6. You cannot install 6.x via dotnet add package until Cashfree publishes it.

2025-01-01 is the latest published and documented REST API version (v5) with an OpenAPI spec. 2026-01-01 exists only as a hardcoded default inside the current Node, Python, and Go SDKs and is not a documented API version.

Do not use it for first-time feature integration guidance, which belongs to the product-specific skills, or for cross-vendor migrations from Razorpay, Juspay, or PayU. It covers only intra-Cashfree version upgrades.