A Payment API Built for Developers

Clean REST API, SDKs in 5 languages, sandbox testing, and sub-second latency — all backed by transparent Network Offset Pricing instead of flat-rate markups.

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0.99%
Uptime SLA
0ms
Avg. Latency
0+
SDKs
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Contracts

API Capabilities

Everything you need to build, test, and scale custom payment experiences.

REST API

Clean, RESTful endpoints for charges, refunds, customers, subscriptions, and payouts. JSON request/response format with idempotency keys and pagination.

SDKs in 5 Languages

Official SDKs for Node.js, Python, PHP, Ruby, and .NET. Auto-generated from our OpenAPI spec so they are always in sync with the latest API version.

Tokenization & Vault

Client-side tokenization via Drop-in UI or custom Elements. Card data never touches your servers. Server-side vault API for managing stored payment methods.

Webhooks & Events

Real-time webhook notifications for payments, refunds, disputes, and subscription events. Signed payloads with retry logic for reliable event delivery.

Multi-Method Support

Accept cards, ACH, Apple Pay, Google Pay, and BNPL through a single API integration. One integration, all payment methods.

Sandbox Testing

Full sandbox environment with test card numbers, simulated webhooks, and scenario testing. Test every edge case before going live.

Reporting API

Programmatic access to transactions, settlements, disputes, and revenue data. Build custom dashboards or export to your data warehouse.

Sub-Second Latency

Average authorization latency under 50ms. Our edge network routes requests to the nearest processing node for consistent, sub-second performance.

0.99%
Uptime
0ms
Latency
0+
SDK Languages
0+
States Served

Based on PaySec merchant data, Q1 2026. Individual results may vary.

2-day integration
“We evaluated five payment APIs. PaySec was the only one with $0 processing fees AND a clean developer experience. Integration took two days, and the sandbox was actually useful — test card behaviors matched production exactly.”
A
Alex Petrov
Lead Engineer, StackPay Fintech

PaySec API vs. Other Payment APIs

FeaturePaySecStripeAuthorize.net
$0 processing fees
REST API
Official SDKs (5+ languages)Limited
Full sandbox environment
Webhook notifications
Idempotent requests
Token migration from competitors
Dedicated integration supportExtra cost

Developer API FAQ

Related Resources

Payment Gateway →eCommerce Integrations →Security & Encryption →

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