Top 5 Payment Gateway APIs for Indian SaaS: A Developer’s Analysis

As Indian SaaS companies, e-commerce platforms, and service providers increasingly target global markets, the need for robust international payment integration has become paramount. While numerous payment gateways offer cross-border capabilities, the developer experience and the specific API features required to handle these transactions efficiently — especially given India’s unique compliance landscape — vary significantly.

Simply processing a charge isn’t enough. Developers need APIs that elegantly handle multiple currencies, diverse global payment methods, stringent security protocols such as 3D Secure 2.0, and, crucially, provide programmatic access to the data required for Indian regulatory needs like the Foreign Inward Remittance Certificate (FIRC). Manual processes for compliance or reconciliation simply don’t scale.

This article provides a technical deep dive into the APIs of five major payment gateways active in India, evaluating their suitability for developers building applications that require international payment  acceptance. We focus on API design, core international payment features, developer experience (DX), and the critical aspect of handling compliance programmatically.

The API Litmus Test: Key Criteria for Evaluation

When assessing an international payment gateway API from an Indian developer’s perspective, the following factors are critical.

API Design & Developer Experience (DX)

• Architecture: Is the API truly RESTful, with predictable, resource-oriented URLs and standard HTTP methods?
• Documentation: Is the API reference comprehensive, accurate, and easy to navigate? Are there clear code examples, tutorials, and quickstart guides relevant to international payments?
• SDKs: Are well-maintained SDKs available for major backend languages (Node.js, Python, Java, PHP, Ruby)? Do they provide convenient abstractions over raw API calls?
• Sandbox environment: How closely does the sandbox mimic the production environment, especially for testing international card flows, 3DS challenges, and currency conversions? Is it reliable and easy to provision test credentials?
• Developer support: How responsive and technically adept is the support team when developers face integration issues?

Multi-Currency & FX Handling via API

• Currency support: Does the API allow creating charges directly in major international currencies (USD, EUR, GBP, etc.)?
• FX rate transparency: Can applicable foreign exchange rates be fetched or previewed via the API?
• Settlement data: How clearly does the API, or related webhooks, expose the final settlement amount in INR, including any applied FX rates or fees?

Payment Method Integration (API Level)

• International cards: How straightforward is the API flow for accepting major international card networks (Visa, Mastercard, Amex)?
• Other global methods: Does the API support integrating other relevant methods, such as PayPal, easily if required?

Security & 3DS2 Integration APIs

• PCI compliance: Does the provider offer solutions (such as hosted fields or dedicated SDKs) that minimize the developer’s PCI compliance burden?
• 3D secure 2.0: How does the API manage mandatory 3DS2 flows for relevant international transactions? Does it provide clear status updates via webhooks or callbacks for authentication success, failure, or challenge flows?
• Fraud prevention APIs: Are there endpoints for retrieving fraud risk scores, passing custom transaction metadata for risk analysis, or configuring fraud rules programmatically?

Compliance & Settlement Data via API (Critical for India)

• FIRC data retrieval: Can the essential data points required for FIRC generation — such as UTR number, purpose code, transaction ID, settlement amount, and FX rate — be accessed programmatically via API endpoints or reliably delivered through webhooks? Or does this require manual report downloads?
• Reconciliation: Do the settlement APIs or reports provide sufficient detail (for example, linking settlements back to original transaction IDs) to enable automated reconciliation of international payments credited to an Indian bank account?

The API Deep Dive: Comparing Five International Payment Gateways

Let’s examine how five popular gateways stack up based on these API-centric criteria.

1. Razorpay International Payments

Positioning: Optimized for Indian businesses — SaaS, e-commerce, and services — going global.

API analysis: Razorpay offers a largely RESTful API. Creating international charges involves specifying the currency parameter, with support for 130+ currencies. The documentation is generally clear, with dedicated sections for international payments and code examples in multiple languages. SDKs are available for major platforms.

Strengths (API focus):

• Compliance automation: Razorpay’s key differentiator. While direct API endpoints for all FIRC data points are still evolving, the platform provides crucial identifiers — such as razorpay_payment_id, settlement details (settlement_id, utr) — via webhooks and dedicated Settlement APIs. This facilitates programmatic reconciliation and compliance data collection. Features like the MoneySaver Export Account aim to improve FX transparency, often reflected in settlement details accessible via API. Additionally, the international payment gateway handles international card payments reliably, with minimal downtime.
• Unified domestic/international payments: Indian payment methods (UPI, Netbanking) and international cards are handled through a relatively consistent API structure, reducing integration complexity.

Potential weaknesses (API focus):
The sandbox environment, while functional, may not always replicate all edge cases for international 3DS flows across card issuers. Advanced FX rate querying may not be fully exposed via API.

Verdict: A strong choice for Indian developers prioritizing integrated compliance and a unified API for domestic and international payments. The programmatic access to settlement data is a significant advantage, and the MoneySaver Export Account is a cost-effective alternative to traditional bank transfers.

2. Stripe (Global)

Positioning: The feature-rich global standard.

API analysis: Stripe’s API — especially PaymentIntents — is widely regarded as a gold standard for design, consistency, and documentation. It is highly flexible, supporting complex international scenarios, multiple currencies, and a broad range of global payment methods. SDKs and developer tooling are excellent.

Strengths (API focus):

• Flexibility and power: Granular control over the payment lifecycle, including 3DS handling, and support for many international payment methods beyond cards.
• Developer experience: Best-in-class documentation, client libraries, CLI tooling, and sandbox environment. Extensive webhook support enables real-time updates.

Potential weaknesses (API focus):

• Indian compliance via API: Programmatically extracting FIRC-related data — such as the exact UTR number from Indian settlement batches — can be challenging. It often requires parsing settlement reports obtained manually or via indirect APIs (for example, the Reporting API), adding complexity compared to India-focused providers. Purpose code management might also be less integrated at the API level.

Verdict: An excellent API for complex global payment flows and experienced teams. However, developers must plan for additional work to automate India-specific compliance requirements.

3. PayPal

Positioning: Widely trusted globally, with varying API depth.

API analysis: PayPal provides modern REST APIs for checkouts and card processing (where available). Integration typically involves redirects or JavaScript SDKs. Multi-currency handling is a core capability.

Strengths (API focus):

• Global recognition: Integrating the PayPal wallet via API or SDK is straightforward and benefits from strong global user trust.
• Broad currency support: Native multi-currency support across APIs.

Potential weaknesses (API focus):

• API complexity: Direct international card processing (beyond PayPal wallet payments) can be more complex or have limited availability compared to Stripe or Razorpay.

• Indian compliance via API: Similar to Stripe, retrieving FIRC-related settlement data (like UTR) programmatically often requires specific reporting endpoints or manual report downloads. Auto-withdrawal can further complicate reconciliation.

Verdict: Essential if PayPal wallet support is a priority. For direct card processing, carefully evaluate API capabilities and the feasibility of automating Indian compliance workflows.

4. 2Checkout (Verifone)

Positioning: Focused on global e-commerce and digital goods.

API analysis: 2Checkout provides APIs for global e-commerce use cases, supporting multiple currencies and international payment methods. Documentation covers order creation, payments, and subscriptions.

Strengths (API focus):

• Global payment methods: Strong support for region-specific international payment methods.
• E-commerce features: APIs often include features relevant to e-commerce, such as tax handling and localized checkout features.

Potential weaknesses (API focus):

• DX and modernity: API design and developer experience may feel less modern or intuitive compared to Stripe or Razorpay.
• Indian compliance via API: Accessing Indian settlement details (such as UTRs for FIRC) programmatically may be less straightforward and insufficiently documented for Indian compliance needs.

Verdict: A viable option for global e-commerce businesses, but requires careful evaluation of API endpoints and processes for automating Indian compliance and reconciliation.

5. CCAvenue

Positioning: Established Indian player with international capabilities.

API analysis: CCAvenue supports international payments and multi-currency processing. Historically, integrations relied on form posts or proprietary protocols, though newer APIs may be available.

Strengths (API focus):

• Local market expertise: Deep understanding of the Indian banking ecosystem.
• Multi-currency processing: Supports international currencies with INR settlement.

Potential weaknesses (API focus):

• API Design and DX: Older integrations may feel less developer-friendly. Documentation can be less comprehensive or harder to navigate.
• Compliance data via API: Programmatic access to granular settlement data (such as UTRs for FIRC) may be limited or require manual report handling.

Verdict: Reliable, especially for businesses already using CCAvenue domestically, but developers should carefully assess the latest APIs with a focus on DX and automated access to compliance data.

API Feature Matrix: Quick Comparison for Developers

Gateway	API Design	Multi-Currency API Ease	FIRC Data via API?	SDK Quality	Docs Clarity	Sandbox Quality
Razorpay Int'l	Mostly RESTful	Excellent	Yes (Partial/Via Settlements API/Webhooks)	Excellent	Excellent	Good
Stripe (Global)	Excellent (REST)	Good	Indirect (Via Reporting API/Manual)	Excellent	Excellent	Excellent
PayPal REST	Good (REST)	Good	Indirect (Via Reporting/Manual)	Good	Good	Good
2Checkout (Verifone)	Fair-Good	Good	Likely Indirect	Fair	Fair	Fair-Good
CCAvenue	Varies (Legacy/New)	Fair	Likely Indirect/Manual	Fair	Fair	Fair

Note: “FIRC Data via API?” refers to the ease of programmatically obtaining identifiers such as UTRs for automated compliance, not merely the existence of the data in reports.

Conclusion: Selecting the Best API for Your International Stack

Choosing an international payment gateway API requires balancing global feature richness with local operational realities.

• Global powerhouses (Stripe, PayPal): Offer flexible, feature-rich APIs ideal for complex international scenarios. However, automating India-specific compliance — especially FIRC data retrieval — often requires additional engineering effort.
• India-optimized solutions (Razorpay): Aim to bridge this gap by combining international payment capabilities with built-in or well-exposed compliance pathways via APIs and webhooks, reducing development and operational overhead.
• Specialized players (2Checkout, CCAvenue): Provide essential functionality but may lag in API modernity, DX, or programmatic access to India-specific compliance data.