Brokerage API Unified Dashboard

2.55

Derivation Chain

Step 1 KOSPI surge & retail investor trading volume explosion

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Step 2 Need for multi-brokerage account management

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Step 3 Cross-brokerage data integration Infrastructure

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Step 4 Unified asset dashboard for individual investors

Problem

68% of stock investors hold accounts at 2+ brokerages, but must check balances, returns, and trade history separately in each brokerage app, spending 15–30 minutes daily to get a full portfolio overview. During KOSPI surges, the inefficiency is amplified as cross-account information checks become frequent for rebalancing positions across stocks.

Solution

Integrates open APIs (OpenAPI, xing-API, etc.) from major Korean brokerages — Korea Investment, Kiwoom, Samsung, Mirae Asset, NH Investment — to display balances, holdings, returns, and dividend history from multiple accounts in a single dashboard. Provides cross-account average purchase prices per stock, sector allocation breakdowns, return rankings, and rebalancing recommendations.

Target: Individual investors aged 30–50 with 2+ brokerage accounts and ₩30M+ (~$22,500+) in managed assets

Revenue Model: SaaS Monthly Subscription: ₩4,900/month (~$3.70) per account (up to 2 brokerages), Premium (5 brokerages + rebalancing + tax simulation) ₩9,900/month (~$7.50)

Ecosystem Role: Infrastructure

MVP Estimate: 1_month

NUMR-V Scores

N Novelty

1.0/5

U Urgency

3.0/5

M Market

4.0/5

R Realizability

2.0/5

V Validation

3.0/5

NUMR-V Scoring System

N Novelty	1-5	How uncommon the service is in market context.
U Urgency	1-5	How urgently users need this problem solved now.
M Market	1-5	Market size and growth potential from proxy indicators.
R Realizability	1-5	Buildability for a small team with realistic constraints.
V Validation	1-5	Validation signal quality from competition and demand data.

SaaS N=.15 U=.20 M=.15 R=.30 V=.20 Senior N=.25 U=.25 M=.05 R=.30 V=.15

Feasibility (52%)

Tech Complexity

24.7/40

Data Availability

15.0/25

MVP Timeline

12.0/20

API Bonus

0.0/15

Feasibility Breakdown

Tech Complexity	/ 40	Difficulty of core implementation stack.
Data Availability	/ 25	Practical availability and cost of required data.
MVP Timeline	/ 20	Expected time to ship a usable MVP.
API Bonus	/ 15	Bonus for viable public API leverage.

Market Validation (54/100)

Competition

8.0/20

Market Demand

6.2/20

Timing

14.0/20

Revenue Signals

10.5/15

Pick-Axe Fit

12.0/15

Solo Buildability

3.0/10

Validation Breakdown

Competition	/ 20	Signal quality from competitor landscape.
Market Demand	/ 20	Demand proxies from search and mention patterns.
Timing	/ 20	Fit with current shifts in tech, behavior, and regulation.
Revenue Signals	/ 15	Reference evidence for monetization viability.
Pick-Axe Fit	/ 15	How well the concept serves participants in a trend.
Solo Buildability	/ 10	Practicality for lean-team implementation.

Technical Requirements

Backend [high] Frontend [medium] Data Pipeline [low]

Dashboard