API Banking & Integrations

API-First Escrow Infrastructure for Fintechs That Build at Scale

API-First Escrow Infrastructure for Fintechs That Build at Scale

Castler’s API-driven escrow platform enables fintechs to embed secure, compliant financial workflows into their products with ease. From real-time fund flows to automated reconciliations and digital KYC, our infrastructure supports fast go-to-market execution. Designed for seamless integration, Castler empowers innovators to launch scalable fintech experiences without compromising on security or compliance

Castler’s API-driven escrow platform enables fintechs to embed secure, compliant financial workflows into their products with ease. From real-time fund flows to automated reconciliations and digital KYC, our infrastructure supports fast go-to-market execution. Designed for seamless integration, Castler empowers innovators to launch scalable fintech experiences without compromising on security or compliance

API Banking & Integrations

API-First Escrow Infrastructure for Fintechs That Build at Scale

Castler’s API-driven escrow platform enables fintechs to embed secure, compliant financial workflows into their products with ease. From real-time fund flows to automated reconciliations and digital KYC, our infrastructure supports fast go-to-market execution. Designed for seamless integration, Castler empowers innovators to launch scalable fintech experiences without compromising on security or compliance

What is API Banking?

API Banking enables businesses to include banking services - you name it: fund transfers, real-time reconciliation, and account visibility - within their own applications through secure, developer-friendly banking APIs.


Whether you are an NBFC issuing loans, a marketplace streamlining vendor payments, or a fintech expanding digital payments, Castler's high-scale API banking platform puts you in full control of 12+ connected banks - through one API stack.

Why is API Banking the Future?

One API. 15+ Bank Integrations. Zero Complexity

Castler bridges your business with India's leading banks through a multi-bank API integration platform - supported by enhanced compliance and designed for new-age workflows.

Compliant by Design Castler is PCI DSS, ISO 27001, and SOC-2 compliant, which means your API-based current accounts and digital transactions are of the highest regulatory standard.

Faster Time to MarketLaunch use cases in days through our sandbox for banking API integration and go live with bulk disbursements, UPI collections, or automated escrow flows.

Core Features of Castler’s API Banking Solution

Core Features of Castler’s API Banking Solution

Multi-Bank Current Account via API

Multi-Bank Current Account via API

Open and manage corporate banking APIs for current accounts instantly

Automate balance fetch, funds transfer, and payee verification

Real-Time Payments and Disbursements

Real-Time Payments and Disbursements

Integrate NEFT, RTGS, IMPS and UPI APIs

Enable bulk payouts and mandate-based collections using eNACH API

Automated Reconciliation & Reporting

Automated Reconciliation & Reporting

Fetch bank statements through real-time reconciliation APIs

Track transactions, create digital challans, and achieve audit readiness

Role-Based Secure Access & Workflows

Role-Based Secure Access & Workflows

Enforce maker-checker API workflows with full audit trails

Manage access with role-based permissions for finance, ops, and compliance teams

Plug-and-Play API Gateway

Plug-and-Play API Gateway

Access Castler's RESTful API documentation and sandbox

Pre-integrated with ERPs, LMS, CRMs, and payment systems

Use Cases: Built for Your Industry

Use Cases: Built for Your Industry

API Banking for NBFCs & Lenders

Automate disbursements of loans, authenticate borrowers, and settle repayments in real time

API Banking for Fintechs

Launch compliant payment flows and real-time settlement APIs

API Banking for Marketplaces & Aggregators

Process payouts, commissions, and vendor KYC with a scalable, white-labeled API solution

Escrow & Trust Account APIs

Design and operate digital escrow frameworks with RERA escrow API solutions and trust account APIs

PSU & Government Projects

Implement compliant transaction banking APIs with complete visibility and approval controls

Built for Security, Compliance, and Scale

Built for Security, Compliance, and Scale

Built for Security, Compliance, and Scale

PCI DSS, ISO 27001, SOC-2

15+ Partner Banks

99.99% API Uptime

5 Million+ Monthly API Calls

1000+ Enterprise Clients

₹15,000+ Cr in EUM

Ready to Integrate API Banking into Your Stack?

Ready to Integrate API Banking into Your Stack?

Whether you’re building financial products, automating treasury ops, or digitizing collections, Castler’s white-labeled API banking solution is your fastest path to compliant, scalable, and enterprise-grade banking infrastructure.

Whether you’re building financial products, automating treasury ops, or digitizing collections, Castler’s white-labeled API banking solution is your fastest path to compliant, scalable, and enterprise-grade banking infrastructure.

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