INTRODUCING SYSTEM ONE MCP
Save tokens.
Keep your agent moving.
Make better decisions.
Your agent does not need a long reasoning step for every small choice. System One MCP lets it hand focused questions to Jev and use the answer to keep working.
Try the hosted free preview. Up to $1 of Jev usage per month, shared across your agents. Email sign-in. No card.
A SMALL DECISION INSIDE A LARGER TASK
Keep the context that matters.
A coding agent searches your project and finds twelve files. Some explain the bug. Others mention the same words but add little. Reading everything uses context and time.
With System One, the agent can ask Jev to rate those passages against the task, then inspect the useful ones first. The originals remain available. When the answer is uncertain, the agent keeps that uncertainty and investigates.
The same approach fits a tool choice, a catalog match or a check that the evidence supports a claim. A short structured answer can replace a repeated reasoning step.
Use the right amount of reasoning.
System One exposes focused tools through MCP. Your agent supplies evidence and a question with defined answers. Jev returns a choice, a score or a boolean probability. Your agent interprets the result and owns the next action.
Use deterministic rules when they already solve the problem. Delegate a small decision when its result helps the larger task. Keep complex planning and ambiguous judgments with your main agent.
Measure the whole task.
Reducing irrelevant context can save downstream tokens. A fast decision can shorten a repeated step. An evidence check can catch a mistaken conclusion. Each benefit depends on the workflow; an extra call can also add latency or cost.
Our small evidence-check study batched two questions over each of twelve inputs. It used 12 calls instead of 24, with median SDK time of 256 ms instead of 537 ms. It also answered one fewer label correctly: 23 of 24 instead of 24 of 24. Those are diagnostic results, not promised production savings. Read the method and results.
Your agent, with a shared control center.
Connect through OAuth, choose the services each connection can use, and inspect usage and recent response times in your hosted dashboard. Pause evaluations or revoke an agent's access whenever you need to.
The free preview includes up to $1 of Jev usage per UTC calendar month. A server-side allowance covers all your connections. There is no payment card and no automatic paid overage. You can also keep using the local application with your own provider key.
Create your free workspace →PICK A FIRST TASK
One useful decision.
Your agent does the rest.
Choose a recipe and your agent. Each setup prompt checks for an existing plugin or MCP connection before adding another.
Choose the next tool
Find the code responsible for a form submitting twice.
How it helps
Jev selects from the available tool descriptions. The agent supplies the arguments and runs the tool.
Give a repeated routing choice to a small model and keep the main agent on the repair.
Search found several files. Which ones explain this bug?
How it helps
Jev rates the retrieved passages against the task. The original passages stay available for review.
Reduce irrelevant context before the next reasoning step.
Check a claim before repeating it
Does this tool output support the claim that the release is live?
How it helps
Jev checks the statement against supplied evidence and separates contradiction from missing information.
Catch an unsupported conclusion before it becomes an answer or another action.
Match a palette to a brief
Choose a calm palette for a coastal reading app.
How it helps
Jev compares your described palettes with the brief. The agent applies the chosen tokens and checks contrast in code.
Reuse a selection recipe for design choices with a clear brief and a defined set of options.
Find the item a person describes
Find a compact desk lamp with warm light and no subscription.
How it helps
Jev compares the supplied item descriptions and returns a candidate or a reason to review the choice.
Match natural language to an existing catalog without generating an item that does not exist.
Choose a useful diagnostic check
The service is running, but requests still fail. What should we inspect next?
How it helps
Jev chooses among the checks the agent can actually run, using the symptoms already collected.
Make the next investigation step explicit. Compare it with a fixed diagnostic sequence.