Shift Log: Cursor Native Access and Relay365 Routing

The shift task is straightforward: keep Cursor as the editor, then decide whether model requests should use Cursor-managed access or a custom OpenAI-compatible endpoint. The meaningful comparison is not which route has the longest model list. It is which route gives your team the right balance of feature coverage, billing control, troubleshooting effort, and data-handling approval.

Cursor-managed access keeps the operational surface smaller

Cursor-managed access is the simpler starting point. You select supported models inside Cursor and use the product’s own account and billing arrangements. There is no separate relay endpoint or provider key to maintain, and fewer configuration layers stand between a failed request and a useful support report.

A custom provider introduces another operational boundary. Cursor remains the client, but an external service handles eligible model requests. That can give you a separate usage ledger and access to a broader provider catalog. It also means authentication, model availability, request compatibility, and upstream failures may require investigation outside Cursor.

The first verdict favors Cursor-managed access for minimum setup work. Choose a custom endpoint when centralized provider billing or model choice is worth the additional configuration and verification.

Relay365 supplies the endpoint, not a replacement Cursor subscription

Relay365 is a pay-as-you-go relay desk for multiple model families. It fits teams that want one provider account for eligible Cursor requests alongside tools such as Claude Code, Codex, Gemini CLI, and OpenAI SDK-based applications.

Its API base is https://api.api365relay.com. For OpenAI-compatible clients, use https://api.api365relay.com/v1. Do not assume the bare host and the versioned endpoint are interchangeable in Cursor.

Provider usage charges and Cursor subscription requirements are separate questions. Supplying an external key does not establish that every Cursor feature is included, supported, or billed through that provider. Check the current terms and feature behavior on both sides before treating this as a cost-saving change.

Configure Cursor with a disposable test workspace first

• Create a provider API key and store it securely, rather than putting it in a repository or shared workspace file.
• Open Cursor Settings and find the model or API-key configuration area; labels and placement can change between releases.
• Locate the OpenAI API key field and the OpenAI base URL override, if your installed version exposes them.
• Enter your Relay365 key and set the overridden base URL to https://api.api365relay.com/v1.
• Add or select a model using the exact API model identifier published by the provider, not a guessed identifier derived from its display name.
• Run any available verification control, then send a short, non-sensitive chat request in a disposable workspace.

For example, if Relay365 lists Gemini 2.5 Flash for the endpoint, copy its documented identifier exactly. A model appearing in a catalog does not by itself prove that Cursor can use every capability it exposes.

Test Cursor workflows beyond a successful chat response

A successful greeting confirms very little about an engineering workflow. Next, ask Cursor to inspect a small file and propose a bounded edit. If your intended workflow uses tools or agent actions, test those explicitly. OpenAI-compatible describes an interface convention, not identical behavior across streaming, tool calls, context limits, and error responses.

Do not assume Cursor Tab, every agent mode, or other specialized features will use your external key. Confirm current Cursor support and observe which requests appear in the provider’s usage records. Also check whether the base URL override affects other enabled OpenAI models before mixing native and relay-backed selections.

For failures, separate the layers. Authentication errors suggest checking credentials and endpoint configuration. Model errors suggest checking identifiers and availability. A chat request that works while an edit fails points toward capability or client compatibility rather than basic connectivity.

Close the shift with a routing decision and rollback path

Choose Cursor-managed access when integrated behavior and fewer moving parts matter most. Choose Relay365 when pay-as-you-go provider billing and a shared relay account across development tools match your operating needs, and your tested Cursor workflows behave correctly.

Before routing work code externally, review the provider’s data-handling terms, your organization’s policy, and spending controls. If that review supports the change, create a Relay365 account and validate one model before expanding usage.

Keep rollback simple: record the previous settings, remove the override when necessary, and retest the original route. The final acceptance criterion is a verified coding workflow, not merely a green connection check.