Parqet - Portfolio Tracker API integration services for OpenData and OpenFinance workflows

1) Portfolio activity ingestion API

We map Parqet-style activities into an auditable event stream with fields such as instrument identifier, booking date, gross amount, taxes, fees, and currency context. Teams use this module for transaction-history API integration and monthly close automation.

Concrete output: accounting-ready activity feeds that can be pushed to BI tools or ERP posting queues.

2) Holdings and balance sync module

This module produces account-level holdings and cash snapshots, including quantity, cost basis, market value, allocation bucket, and valuation timestamp. It is commonly used for balance sync in multi-broker wealth dashboards.

Concrete output: near real-time net worth and exposure widgets for advisor portals.

3) Dividend calendar and cash-flow endpoints

We expose expected and realized income events with payout date, ex-date, net/gross amount, withholding assumptions, and annualized yield metrics. Product teams use this for dividend strategy dashboards and liquidity planning.

Concrete output: forecast-vs-actual dividend reports and alerting hooks.

4) Benchmark and performance comparison API

Returns absolute and relative return series, period splits (monthly/quarterly/yearly), and benchmark deviation fields that support portfolio-performance API integration for client reporting.

Concrete output: white-label performance reports with index comparisons.

5) Tax and fee analytics feed

Parses tax exposure, withholding components, and fund fee signals into structured records. Especially useful for jurisdiction-aware reporting in Germany and broader EU workflows where investors need tax transparency.

Concrete output: export packs for tax prep teams and advisory compliance checks.

Scenario A: Wealth reporting for advisory firms

Business context: a multi-client advisory team needs a single reporting layer across Trade Republic, Comdirect, Kraken, and other sources. Data/API involved: activity events, holdings snapshots, benchmark series, and dividend history. OpenData/OpenFinance mapping: transform user-authorized account data into standardized portfolio reporting APIs with role-based access controls and scheduled refresh windows.

Scenario B: Finance operations and reconciliation

Business context: an investment operator needs to reconcile broker activity with internal accounting books. Data/API involved: event-level trades, fees, taxes, FX context, and account cash movements. OpenData/OpenFinance mapping: expose transaction-history API endpoints and CSV-derived ingestion routes that feed reconciliation engines and exception queues.

Scenario C: Dividend strategy automation

Business context: an income-focused investor product sends payout forecasts and cash runway alerts. Data/API involved: dividend calendar, forecasted yield, realized payouts, withholding assumptions. OpenData/OpenFinance mapping: package dividend data into subscription endpoints and webhook events for calendar sync and treasury planning.

Scenario D: Community benchmark intelligence

Business context: a fintech dashboard compares portfolio behavior to benchmark baskets and peer cohorts. Data/API involved: return curves, asset allocation vectors, concentration metrics, and period deltas. OpenData/OpenFinance mapping: feed anonymized analytics APIs that support compliant cohort benchmarking without exposing personal identity data.

Auth/session bootstrap (pseudocode)

POST /api/v1/parqet/session/bootstrap
Content-Type: application/json

{
  "user_ref": "client_784",
  "consent_scope": ["activities:read", "positions:read", "dividends:read"],
  "callback_url": "https://client.example.com/oauth/callback"
}

Response 200:
{
  "session_id": "sess_98ab",
  "auth_url": "https://gateway.example.com/connect/parqet/start",
  "expires_in_sec": 900
}

Activity export endpoint (pseudocode)

GET /api/v1/parqet/activities?from=2025-01-01&to=2025-03-31&type=DIVIDEND
Authorization: Bearer <ACCESS_TOKEN>

Response 200:
{
  "items": [
    {
      "activity_id": "act_01",
      "booked_at": "2025-02-10T09:30:14Z",
      "instrument_isin": "US0378331005",
      "type": "DIVIDEND",
      "amount": {"value": 57.22, "currency": "EUR"},
      "withholding_tax": 8.58
    }
  ],
  "next_cursor": "eyJwYWdlIjoyfQ=="
}

Webhook + error policy (pseudocode)

POST /api/v1/webhooks/parqet
{
  "event": "positions.updated",
  "account_id": "acc_204",
  "as_of": "2025-04-15T07:00:00Z",
  "delta_count": 12
}

Error contract:
{
  "error_code": "SOURCE_RATE_LIMIT",
  "message": "Upstream sync limit reached",
  "retry_after_sec": 120,
  "request_id": "req_77ff"
}

About our studio

We are a technical service studio focused on app interface integration and authorized API integration, with delivery experience across mobile products and fintech data pipelines. Our work covers protocol analysis, interface refactoring, OpenData integration design, third-party interface integration, automated data scripting, and practical API documentation that engineering teams can use immediately.

Clients engage us when they need fast execution without sacrificing governance quality. We support Android and iOS data access patterns, web backoffice integration, and cloud deployment. Every delivery package is designed for implementation teams: clear API contracts, runnable source code, test plans, and handoff materials that reduce onboarding time.

• Source code delivery from $300: runnable API code, integration docs, and test assets; payment after delivery confirmation.
• Pay-per-call hosted API model: usage-based billing with no upfront integration spend.

Contact information

For quotes, timelines, and architecture consultation, submit your target app and required flows via the contact page.

Open contact page

Deliverables checklist

• Integration blueprint for login/session, activity export, holdings sync, and analytics output.
• OpenAPI-style API contract draft including request/response and error schemas.
• Runnable source implementation (commonly Node.js or Python) with environment templates.
• Automated test examples for auth, pagination, retries, and data-integrity assertions.
• Compliance notes for GDPR/PSD2-adjacent boundaries and data retention practices.

Engagement workflow

1. Scope definition: decide exact fields, refresh intervals, and target systems.
2. Protocol analysis and mapping: align app data structures to stable integration schema.
3. Implementation and validation: build APIs, normalize outputs, and run integration tests.
4. Delivery handoff: source code, documentation, support checklist, and launch guidance.
5. Optional managed mode: hosted pay-per-call endpoint and monitoring handover.