Banking API Development
Banking APIs for accounts, payments, cards and data — secure, versioned and documented for partners and internal teams.
- ClientCheckout · wallet
- APIIdempotency key
- Identity & KYCVerified
- Risk & complianceRules passed
- Payment gatewayAuthorised → captured
- LedgerDouble-entry posted
- SettlementBank rail · T+1
Journal entry · balanced
| Account | Debit | Credit |
|---|---|---|
| Customer funds | 120.00 | — |
| Merchant payable | — | 118.20 |
| Fee revenue | — | 1.80 |
Division
Service area
Embedded Finance, BaaS & Open Banking
Engagement
Project · Team · Managed
Overview
Banking APIs expose accounts, payments, cards and customer data to channels, partners and fintechs. We design and build banking APIs with strong security (OAuth 2.0, mutual TLS, consent), consistent resource models, idempotent payment endpoints, webhooks, sandboxes and developer portals — over modern ledgers or existing cores — so banking capabilities can be consumed like any modern platform.
Common use cases
- Partner banking APIsFintechs and corporates integrating with the bank.
- Open banking complianceStandardised APIs where required by regulation.
- Internal API layerChannels and products consuming shared banking services.
- BaaS offeringBanking capabilities offered to non-bank brands.
Quick answers
Banking API Development at a glance
The essentials in brief. Every project is scoped individually — ask us for specifics.
- What is banking API development?
- Banking APIs for accounts, payments, cards and data — secure, versioned and documented for partners and internal teams.
- Who is it for?
- Typically neobanks, payment companies, lenders, wealth platforms and financial institutions building or modernising customer-facing and back-office systems.
- What does Shivacha provide?
- API design
- Security
- Idempotent payments
- Webhooks
- Sandbox
- Developer portal
- Which technologies are used?
- Open Banking APIs, OpenAPI, OAuth 2.0 & OIDC, Double-Entry Ledgers, Node.js, Go (Golang) — chosen to fit your stack and constraints.
- How does the process work?
- Use-case design → Partner selection support → API layer build → Embedded experience → Operate.
- What affects the cost?
- Banking, card, payment and KYC partners to integrate
- Ledger and reconciliation complexity
- Number of currencies, countries and payment rails
- Compliance, reporting and audit requirements
- Mobile, web and back-office scope
- Availability and disaster-recovery targets
- How long does it take?
- A regulated-market MVP usually takes 4–7 months including partner integrations; extensions to an existing platform can ship in weeks.
- How do I get started?
- Share a short brief in the form below, book a 30-minute call or message us on WhatsApp. A senior engineer replies within one business day; NDA on request.
Capabilities
What we deliver
API design
Accounts, payments, cards and customer resources.
Security
OAuth 2.0, mTLS, consent management and scopes.
Idempotent payments
Safe payment initiation with status tracking.
Webhooks
Real-time event notifications.
Sandbox
Realistic test environment with mock data.
Developer portal
Documentation, keys and onboarding.
Architecture
Engineered right from day one
The layers we typically design for embedded finance, BaaS & open banking, adapted to your stack and partners.
- Unified APIOne internal API over multiple partners simplifies product teams' work.
- Consent & data rightsOpen banking consent captured, stored and revocable.
- Clear responsibilityLicensed partners' obligations reflected in flows and data handling.
- Developer experienceSandbox, documentation and SDKs for internal and external developers.
Delivery
How an engagement runs
- 1
Use-case design
Which financial features, for which users, and how they create value in the host product.
- 2
Partner selection support
Technical evaluation of BaaS, processor and data-aggregation partners.
- 3
API layer build
Unified financial APIs over partners, with webhooks and sandbox.
- 4
Embedded experience
Components and flows that match the host product's design.
- 5
Operate
Monitoring, reconciliation and partner reporting.
Security
Security built into delivery
Controls we apply by default on this kind of work — not a separate phase at the end.
Ledger integrity
Double-entry, immutable journals and daily reconciliation against partners.
Idempotent money movement
Every payment operation safe to retry, with no double-spend.
Access control
Maker-checker approvals, least privilege and full audit logging.
Data protection
Encryption in transit and at rest, tokenised card data and PCI-aware architecture.
Technology
Tools we use for this
Products
Start from a platform
Shivacha Banking API
Secure, versioned banking APIs over any core — with sandbox and developer portal.
Learn moreShivacha Digital Bank
A configurable digital banking platform for banks and licensed partners.
Learn moreShivacha Digital Wallet
Stored-value wallets with top-ups, P2P, payments and rewards.
Learn moreRelated services
Often combined with
Embedded Finance Development
Embed accounts, payments, cards and lending into your product through licensed partners and a unified finance API layer.
Learn moreEmbedded Banking
Offer bank accounts and banking features inside your platform through sponsor banks — with native UX and unified ledgers.
Learn moreEmbedded Payments
Embed payment acceptance and payouts into your software platform — onboarding sub-merchants and capturing payment revenue.
Learn moreDedicated team
FinTech Engineering Team
Engineers experienced in ledgers, money movement and financial partner integrations.
Work & insights
Related thinking
Ledger-first architecture for a partner-bank neobank
How we structure a neobank so that balances always reconcile with the sponsor bank and partners can be added or replaced.
Learn moreStablecoin settlement layer for a card-accepting payment platform
A hybrid design that lets merchants accept cards as usual while optionally settling in stablecoins.
Learn moreYour ledger is your product: designing money movement that always reconciles
Fintech products are judged on experience but survive on correctness. A double-entry ledger at the core is what makes balances provable.
Learn moreFAQ
Frequently asked questions
How do banking APIs stay secure?
With layered controls: strong client authentication, fine-grained scopes, customer consent, rate limiting, anomaly detection and full audit logs.
Can APIs sit over a legacy core?
Yes. An API layer can translate modern requests into legacy core operations while caching and event capture improve performance.
What is the difference between BaaS and embedded finance?
Banking-as-a-Service is the infrastructure — licensed banks exposing services through APIs. Embedded finance is the product outcome — a non-financial company offering those services inside its own experience. We build both sides.
Do you support open banking in multiple regions?
We integrate with open banking APIs and aggregators across regions. Coverage depends on the aggregator and the region's standards.
Next step
Discuss Your FinTech Product.
Tell us about your banking API development requirements — goals, timeline and constraints. We will reply with questions, an approach and next steps.
- Senior engineer reads every enquiry
- Reply within one business day
- NDA on request
Your details are used only to reply to this enquiry.