InvestingNote API integration services (SGX / OpenFinance)

Deliverables checklist

• OpenAPI 3.1 specification for all endpoints
• Auth flow report — token chain, refresh, device binding
• Runnable Python and Node.js source for the core read APIs
• Webhook samples for post / portfolio-change events
• Automated integration tests with mocked fixtures
• PDPA & MAS-aligned consent and retention guidance

Engagement workflow

1. Scope confirmation — which screens map to which endpoints.
2. Protocol capture and auth flow analysis (2–5 business days).
3. Build, replay-test, and internal hardening (3–8 business days).
4. Documentation, sample notebooks, postman collection (1–2 days).
5. Handover with a 30-day patch window for upstream app changes.

1. Cross-broker portfolio rollup

Context: a multi-region wealth dashboard wants to merge a user's virtual InvestingNote portfolio with real holdings at moomoo, Tiger Brokers and PhillipCapital.

Data: /portfolio/positions, /portfolio/transactions, plus partner broker statement APIs.

OpenFinance mapping: follows the MAS Finance-as-a-Service API Playbook account-aggregation pattern — consented account binding, then a periodic JSON pull keyed on user ID.

2. Retail sentiment signal for SGX desks

Context: a Singapore sell-side desk wants to track how the InvestingNote crowd is reacting to S68, D05 or C6L ahead of corporate results.

Data: live-feed posts with cashtags, comment counts, reaction sentiment, weighted by user reputation.

OpenFinance mapping: alternative-data export pipeline, billable per ticker-day, mirrored against research desks' existing StockTwits or Seeking Alpha feeds.

3. Tournament & campaign analytics

Context: sponsors of the InvestSG Trading Tournament 2025 want post-event analytics — who traded what, which DLCs and structured warrants moved.

Data: simulation portfolio transactions, leaderboard snapshots, instrument coverage by product (DLC, SW, ETF, REIT).

OpenFinance mapping: closed-loop campaign analytics with consent at registration; output as a CSV plus a Looker-ready BigQuery table.

4. KOL discovery for content licensing

Context: a fintech media platform wants to license premium picks from top-ranked InvestingNote users — similar to following verified analysts on Seeking Alpha.

Data: reputation score time-series, post engagement, marketplace subscriptions, hit-rate of public calls.

OpenFinance mapping: author-level data product with revenue-share metadata baked in.

5. Compliance & market surveillance feed

Context: a compliance team needs to flag coordinated pumping of low-liquidity SGX or Bursa tickers in the live feed.

Data: post burst rate per ticker, account age, reputation gradient, plus SGX short-sell volume cross-reference.

OpenFinance mapping: read-only surveillance webhook, retention capped at 90 days to align with PDPA minimization.

Login & token refresh

// Mirror the in-app authorization handshake
POST /api/v1/investingnote/auth/login
Content-Type: application/json

{
  "username": "user@example.sg",
  "password": "<encrypted>",
  "device_id": "9f3a..."
}

// 200 OK
{
  "access_token": "eyJhbGciOi...",
  "refresh_token": "rt_8c1d...",
  "expires_in": 3600,
  "user_id": "in_2348812"
}

Watchlist & portfolio export

GET /api/v1/investingnote/watchlists
Authorization: Bearer <ACCESS_TOKEN>

// Response (truncated)
{
  "watchlists": [
    {
      "id": "wl_sgx_blue",
      "name": "SGX Blue Chips",
      "tickers": ["D05.SI","S68.SI","C6L.SI","Z74.SI"]
    },
    {
      "id": "wl_us_tech",
      "name": "US Tech",
      "tickers": ["AAPL","TSLA","NVDA","PLTR"]
    }
  ]
}

Live-feed sentiment webhook

POST https://yourapp.example/webhook/sentiment
X-OFL-Signature: sha256=...
Content-Type: application/json

{
  "event": "post.created",
  "post_id": "p_19284",
  "author_id": "in_2348812",
  "author_reputation": 712,
  "tickers": ["TSLA","NVDA"],
  "sentiment": "bullish",
  "confidence": 0.81,
  "created_at": "2026-05-11T08:14:22Z"
}

Multi-venue quote relay

GET /api/v1/investingnote/quote
  ?symbols=D05.SI,7203.T,TSLA,0700.HK
Authorization: Bearer <ACCESS_TOKEN>

// Response
{
  "quotes": [
    {"symbol":"D05.SI","price":40.12,"chg_pct":0.43,"venue":"SGX"},
    {"symbol":"TSLA","price":243.91,"chg_pct":-1.10,"venue":"NASDAQ"},
    {"symbol":"0700.HK","price":372.40,"chg_pct":0.85,"venue":"HKEX"}
  ]
}

Singapore regulatory context

InvestingNote operates under Singapore's Monetary Authority of Singapore regulatory perimeter and Singapore's Personal Data Protection Act (PDPA). Our integrations follow the MAS Finance-as-a-Service API Playbook (first published 2016, with 400+ recommended APIs), align with the Singapore Financial Data Exchange (SGFinDex) consent model, and respect SGX market-data redistribution terms.

For users with regional reach, we also map data flows to Malaysia's PDPA and Hong Kong's PDPO so a single integration covers SGX, Bursa Malaysia, and HKEX without bespoke per-jurisdiction work.

Engineering controls

• Authorized or documented public endpoints only — no scraping of session-locked pages without explicit user consent.
• Consent receipts stored per user, per data category, exportable as JSON.
• Data minimization defaults: no DOB, NRIC, or KYC docs are pulled by default.
• 90-day rolling retention with configurable shorter windows for surveillance feeds.
• Encrypted token storage (AES-GCM at rest, TLS 1.2+ in transit), with rotation hooks.
• Pen-test report and signed NDA available on request for regulated clients.

StockTwits

US-centric stream of ticker-specific chat. Teams who export StockTwits cashtag streams often want the same shape of data from InvestingNote so SGX and Bursa coverage finally lines up with their US sentiment dashboards.

Seeking Alpha

Long-form research and editorially reviewed articles. Customers who license Seeking Alpha content typically pair it with InvestingNote's marketplace picks for South-East Asia regional coverage.

eToro

Global copy-trading platform. Where eToro centralizes the trader-following primitive, InvestingNote centralizes the conversation and reputation primitive — both feed naturally into a unified KOL data product.

moomoo

One of InvestingNote's named partners. Already a brokerage hand-off target in-app, so the same OpenFinance integration can carry an order from a social signal to an actual moomoo trade ticket.

Tiger Brokers

Another partner broker visible inside InvestingNote. Integration teams often need a normalized "Tiger + moomoo + PhillipCapital" abstraction; the same broker hand-off layer covers all three.

ShareJunction

A long-running Singapore stock forum (one of InvestingNote's listed competitors via Similarweb). A unified sentiment pipeline often blends ShareJunction threads with the InvestingNote live feed.

SGInvestors.io

SGX-focused research aggregation site. Frequently consumed alongside InvestingNote market data for retail-trader dashboards covering Singapore-listed REITs and blue chips.

Webull

Mobile-first US broker popular with regional retail investors. Cross-broker dashboards often want Webull positions alongside the InvestingNote virtual portfolio for the same user.

About us

OpenFinance Lab is an independent studio focused on mobile-app protocol analysis and OpenData / OpenFinance / OpenBanking integration. Our engineers come from banks, payment networks, exchanges, and mobile security teams. We have shipped integrations across SGX, Bursa, HKEX, and US venues, and we know the MAS Finance-as-a-Service API Playbook, SGFinDex consent flows, and PDPA controls in detail.

• Brokerage, social trading, REITs, crypto and cross-border clearing experience
• Enterprise API gateways, observability, and incident response runbooks
• Python, Node.js, Go SDKs plus replay-test harnesses for upstream-app changes
• End-to-end pipeline: protocol capture → endpoint design → validation → compliance handover
• Source-code delivery from $300 — runnable APIs and docs, paid after delivery
• Pay-per-call API billing — hosted endpoints, no upfront cost, usage-based pricing

Contact

To request a quote, share an NDA, or submit your target requirements for InvestingNote, open the contact page.

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