Which model does the tool get?

Whatever it asks for. The name auto lets the router choose per turn under your policy; a model id pins it and still routes among its providers; a workspace alias maps the tool's own default name to either.

What does the router add that the tool does not have?

A budget per developer, enforced at the key. The model auto in Cursor's picker. The MCP server's route / quote / explain tools in the agent.

Can I use my own provider keys?

Yes - connect them under Model providers and the router executes on your accounts; model usage is billed by the provider, the platform meters requests.

Cursor through the router

Cursor on your own key, through the router.

Cursor accepts an OpenAI API key with a custom base URL. Point it at OpenSmartRoute: the editor keeps working, the workspace policy and budget apply, and every completion is on the trace. The MCP server adds route, quote and explain tools to Cursor's agent as well.

A budget per developer, enforced at the key
The model auto in Cursor's picker
The MCP server's route / quote / explain tools in the agent

Create a free account Cursor docs

Cursor settingsbash

export OPENAI_BASE_URL=https://api.opensmartroute.ai/v1
export OPENAI_API_KEY=$OSR_API_KEY
# then: Settings > Models > OpenAI API key: paste the key, override the base URL with the router's /v1, add the model name auto.

Cursor speaks the OpenAI API; the router serves chat completions and the Responses API at /v1 with streaming, tools and structured output passed through.

Verify

The first turn is on the activity page.

Send one message from the tool and read the row: the model that answered, the cost, the confidence and a link to the full trace with the alternatives and the policy decisions.

verify.shbash

# the tool's next turn is on the activity page with its cost, model and trace
curl -s https://api.opensmartroute.ai/api/v1/activity?limit=3 -H "Authorization: Bearer $OSR_API_KEY"

Questions

Cursor and the router

Does Cursor need a plugin or a fork?: No. Settings > Models > OpenAI API key: paste the key, override the base URL with the router's /v1, add the model name auto. The router is a standard endpoint; the tool is unchanged.
Which model does the tool get?: Whatever it asks for. The name auto lets the router choose per turn under your policy; a model id pins it and still routes among its providers; a workspace alias maps the tool's own default name to either.
What does the router add that the tool does not have?: A budget per developer, enforced at the key. The model auto in Cursor's picker. The MCP server's route / quote / explain tools in the agent.
Can I use my own provider keys?: Yes - connect them under Model providers and the router executes on your accounts; model usage is billed by the provider, the platform meters requests.

Other tools

The same router behind every tool the team runs.

Put Cursor behind the router today.

A free account, one key, one command. Every turn the tool makes is priced, governed and explained from then on.

Create a free account Migrating application code instead?

Free plan, no card. Fifteen thousand decisions a month with the full trace.

export OPENAI_BASE_URL=https://api.opensmartroute.ai/v1 export OPENAI_API_KEY=$OSR_API_KEY # then: Settings > Models > OpenAI API key: paste the key, override the base URL with the router's /v1, add the model name auto.