FAST DECISIONS FOR YOUR AGENT
Better decisions start
with the right amount of thinking.
Choose tools, find useful context, check evidence or match a design brief. System One MCP gives those repeated decisions to Jev, so your agent can focus on the work that needs it. Track time and usage in your dashboard.
10,000 decisions × 1,000 tokens.
$3/M example rate vs Jev's $0.042/M list rate.
Faster in TypeSafe's selected workflow evaluations.
Compared with chat-model decision wrappers.
Input-only cost estimate; speedup reported by TypeSafe across its selected workflows, not independently reproduced here. Wrappers affect the comparison. Neither figure measures whole-agent savings.
Hosted free preview: up to $1 of Jev usage per month.
Email sign-in · No payment card · Local app also available
The agent supplies a question and relevant context.
YOUR DECISION CONTROL CENTER
Compare request volume and response times. Inspect uncertain results and identify the connection that made each call. Set limits or pause the engine from the same workspace.
Actual interface with demonstration fixture data. Your app's charts show its own receipts.
WHAT SYSTEM ONE MEANS HERE
Which tool fits this task? Which passage is relevant? Does the evidence support this claim? Turn a repeated question into a Jev recipe. Your agent uses the result to continue its work.
Find a decision recipeCHOOSE THE WORK JEV CAN DO
Give Jev a question with evidence and defined answers. Keep the larger task with your agent and compare the result.
Find the code responsible for a form submitting twice.
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?
Jev rates the retrieved passages against the task. The original passages stay available for review.
Reduce irrelevant context before the next reasoning step.
Does this tool output support the claim that the release is live?
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.
Choose a calm palette for a coastal reading app.
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 a compact desk lamp with warm light and no subscription.
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.
The service is running, but requests still fail. What should we inspect next?
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.
LESS REPETITION. A CLEAR NEXT STEP.
A question, your evidence and defined options. System One returns a small decision your agent can use to continue.
ILLUSTRATIVE FLOW · NO LIVE MODEL CALL
Repository search, web search or the test runner?
repository_searchA typed result from defined options.
The calling agent reviews the result.
A bounded tool choice can replace a longer routing step.
Explore this recipeSeveral retrieved passages; only some discuss the event handlers.
keep: event handlersA typed result from defined options.
The calling agent reviews the result.
Less irrelevant text goes into the next reasoning step.
Explore this recipeThe command returned 22 passes and one failure.
claim: contradictedA typed result from defined options.
The calling agent reviews the result.
A short evidence check can catch a misleading completion report.
Explore this recipeThree described palettes: cobalt, warm clay and sea glass.
palette: sea glassA typed result from defined options.
The calling agent reviews the result.
Match a brief against your own options without generating a new palette.
Explore this recipe12 batched requests instead of 24 separate requests in our diagnostic.
See the comparison ↗Median time per batched case, versus 537 ms for two separate calls.
Read every result ↗Jev's published list price per million input tokens. Provider offers may differ.
Provider pricing ↗Our twelve-case synthetic test scored 23/24 correct labels batched and 24/24 separately. These are decision-level results, not whole-agent savings. Provider price checked September 20, 2026.
WORKING IMPLEMENTATIONS
The browser companion and The Infinite Parable show how an application supplies context, uses Jev's answer and keeps control of the result.
A dedicated browser supplies accessible controls and current values. Jev chooses a small next step; the companion returns a screenshot and trace for the agent to review.
Recorded form runs and six accessibility decision cases are published with their failures and limits.
Explore the computer-use implementation ↗The game supplies eligible recordings and scene context. System One can recommend a cue or silence. The game retains cue history, spacing and playback authority.
An authored-dialogue integration. An independent playthrough study has not established an experience improvement.
Explore the dialogue implementation ↗CONNECT THE AGENT YOU USE
The skill explains when to delegate. MCP tools run the recipes. Your agent keeps control of the task and reviews the result before acting.
Connect the hosted MCP with OAuth, or keep using the verified local bridge.
See connection details Configuration availableRemote HTTP and OAuth setup instructions, plus the local bridge option.
See connection details Configuration availableUse the install link for remote MCP, then authenticate in your browser.
See connection details Connection setup requiredAdd a custom MCP in developer mode, subject to account and workspace policy.
See connection detailsUse another agent? Start with its MCP support or call the HTTP API. Users can connect to our hosted MCP endpoint; local engines need a reachable transport for web clients. Check requirements and verification status.
A measured tradeoff
We asked two questions over each of 12 inputs. One request per input used fewer calls than two separate requests. The separate requests answered one more label correctly.
Two questions over each of 12 shared inputs.
Measured SDK wall time in our first run.
Batching made one additional error.
Small synthetic evidence-check diagnostic, September 20, 2026. No host-agent overhead or production savings measured. Full method and every result ↗
MADE FOR PEOPLE WHO USE AGENTS
Choose the hosted free preview or a local engine with your own key. Give each agent a connection you can inspect and revoke.
Preview and product plans ↗Discover patterns, inspect your limits and ask bounded questions. Use a local stdio bridge or a reachable engine's HTTP MCP endpoint.
Separate scoped credentials, daily limits, client attribution and revocation. Provider secrets stay in the engine.
Compare calls, reported tokens, cache use, latency and final task quality. An extra call can cost more; a subscription plan does not become cheaper automatically.
Try a recipe through the cloud preview or your own local engine.