What is vibe trading?

Vibe trading means describing a trading strategy to an AI in plain language, letting the AI write the code, and deciding whether to keep it based on backtest numbers. Humans supply the hypothesis, the AI supplies the code, and the data decides.

How does ksbrain fit into vibe trading?

It supplies traceable equity intelligence to the research stage. ksbrain returns evidence IDs for the inputs behind a judgment and says 'insufficient evidence' when sources are missing, which matches the vibe trading discipline of verifying an AI's suggestion instead of trusting it.

EVIDENCE-FIRST · GEMMA 4 · AGENT-READY

Evidence before judgment.

Kurage Stock Brain is a stateless intelligence API for Japanese equities. It turns licensed or user-supplied market evidence into structured technical, fundamental, disclosure, news, debate and risk judgments—each tied back to evidence IDs and an explicit as-of time.

View on GitHub Try TradingAgents-JP

Kurage Stock Brain

The stock-market sibling of Kurage Crypto Brain and Kurage FX Brain.

Analysis only. No broker credentials, portfolio custody or order execution. Outputs are decision-support information, not investment advice.

A reusable brain, not another trading screen

TradingAgents-JP is the reference application. ksbrain is the independent machine-to-machine product that other agents can reuse.

TRACEABLE

Evidence IDs

Every supported claim cites evidence supplied to the API. Unknown IDs are filtered, and absent inputs produce an explicit insufficient-data result.

STRUCTURED

Agent-ready JSON

Signals, confidence, counter-evidence, risks, missing data, data quality and timestamps use stable schemas instead of free-form chat.

BOUNDARY

No execution

The brain cannot touch a brokerage account. Orchestrators keep policy, sizing, human approval and execution outside the intelligence service.

From raw evidence to an auditable decision

The API keeps collection, reasoning, orchestration and execution as separate responsibilities.

01Collect

Manual evidence or data obtained under the caller's J-Quants contract.

02Store

Normalize, timestamp, hash and assign immutable evidence IDs.

03Reason

Gemma 4 evaluates only the supplied evidence and reports gaps.

04Orchestrate

TradingAgents-JP or another agent applies debate and policy gates.

Where to buy

Sold on the same marketplaces as Kurage Crypto Brain and FX Brain. Paid rails answer with DeepSeek (deepseek-v4-flash).

Channel	Entry
Bankr (x402)	x402.bankr.bot/.../ksbrain — $0.05/call
Coinbase CDP / Bazaar (x402)	cdp-gateway /ksbrain/* ($0.05 per call, all skills)
JPYC (x402)	:18349 /ksbrain/* (7.5 JPYC per call, all skills)
Virtuals ACP	"Kurage AI Project" offering: Kurage Stock Brain ($0.05)
RapidAPI	rapidapi.com/katsushi2441/api/kurage-stock-brain (card billing)

API surface

Private API-key access (local Gemma). US stocks also get a one-shot analysis (POST /v1/us/analyze/full) that auto-fetches SEC EDGAR facts, filings and quotes.

Route	Purpose
POST /v1/evidence	Register traceable evidence
POST /v1/data/jquants/sync	Sync JP primary data (J-Quants, subscription required)
POST /v1/data/us/sync	Sync US primary data (SEC EDGAR facts & filings + daily quotes)
POST /v1/us/analyze/full	US one-shot: auto-fetch SEC EDGAR, then full 7-perspective analysis
POST /v1/analyze/technical	Price and indicator judgment (market=jp/us)
POST /v1/analyze/fundamentals	Financial-statement judgment
POST /v1/analyze/disclosure	Disclosure and filing judgment
POST /v1/debate/bull-bear	Bull/bear synthesis
POST /v1/assess/risk	Risk assessment
POST /v1/analyze/full	Full evidence analysis
POST /v1/screen/opportunities	Rank up to ten symbols

curl -X POST http://127.0.0.1:18338/v1/analyze/technical \
  -H "Authorization: Bearer $KSBRAIN_KEY" \
  -H "Content-Type: application/json" \
  -d '{"symbol":"7203","evidence_ids":["ev_..."]}'

Installation and API guide

Part of the vibe trading toolkit

Growing a strategy by describing it to an AI and letting backtest numbers decide is what we call vibe trading. ksbrain supplies traceable equity intelligence to that loop — every judgment carries evidence IDs, and missing sources are reported as insufficient evidence. Full toolkit: vibe trading guide. Systems in production: kfreqai (crypto) and kfxai (FX).