REST API Development
Standards-based REST APIs with OpenAPI docs and clear versioning.
API Development
API Development & Integration Services
Secure, well-documented REST and GraphQL APIs and third-party integrations for web apps, mobile apps, partners and internal systems.
<50msMedian API latency
100%OpenAPI documented
99.9%Uptime across live APIs
48hFirst working endpoint
Overview
APIs your partners and developers can rely on
A well-designed API lets your website, mobile app, partners and internal tools all work from the same data. Our API development team designs and builds typed REST and GraphQL APIs with clear contracts, versioning and documentation that other developers can start using within minutes.
We also handle the API integrations most businesses depend on: payment gateways, CRMs, ERPs, courier and shipping providers, KYC services, accounting tools and webhooks. Each one is built with retries and monitoring, so an outage at a third-party provider never quietly breaks your operations.
Security and speed are part of the build: OAuth2 and API keys, rate limiting, input validation, caching and load testing, plus OpenAPI specs and SDKs when your partners need them. Platforms like bitCrunch, Verified and eShipz run on APIs we designed this way.
What We Build
REST, GraphQL & Third-Party Integration Services
Typed, documented APIs built for partners, mobile apps and internal teams.
GraphQL API Development
Strongly typed GraphQL schemas with subscriptions and batching.
Auth & Rate Limiting
OAuth2, API keys, JWT and per-client rate limits built in.
Webhooks & Events
Reliable event delivery with retries, signatures and replay support.
Third-Party API Integration
Payment, shipping, KYC, SMS and accounting APIs connected and monitored.
API Migration
Move or version existing APIs without breaking current consumers.
Need something custom?Let's talk
How We Work
How We Design and Build APIs
Contract-first API development, so your web, mobile and partner teams can start building in parallel.
01
Consumer Mapping
We list every app, partner and system that will call the API and what each one needs.
02
Contract-First Design
An OpenAPI or GraphQL schema is agreed and shared before implementation starts.
03
Build & Integrations
Endpoints, webhooks and third-party integrations with retries and idempotency.
04
Security Hardening
OAuth2, API keys, rate limits, input validation and audit logging.
05
Load & Contract Tests
Automated tests that catch breaking changes and prove the API holds up under traffic.
06
Docs & Developer Portal
Interactive docs, a Postman collection and versioning rules your partners can rely on.
Technology Stack
API Development Tech Stack
We pick the technology that suits your project, not whatever is trending this month.
API Protocols
RESTGraphQLgRPCWebSocketsWebhooks
Backend
Node.js / ExpressPython / FastAPIGoNestJS
Auth & Security
OAuth2JWTAPI KeysRate LimitingmTLS
Docs & Testing
Swagger / OpenAPIPostmanJestk6Insomnia
Our Work
View all work API Development Projects We Have Delivered
Real products we have designed, built, and shipped for clients.
Why Techizons
What Sets Us Apart
We work like a long-term technology partner, not a vendor that disappears after launch.
Security-First Development
OWASP practices, GDPR-ready data handling and regular security reviews are part of every project, not an add-on.
Fast by Default
We tune for Core Web Vitals from the first sprint and aim for a 90+ Lighthouse score on every build.
Dedicated Project Manager
One point of contact who knows your business, runs the sprints and keeps delivery on schedule.
Transparent Reporting
Weekly updates, sprint demos and a shared board, so there are no surprises on launch day.
Flexible Team Size
Add two engineers to your team or hand us the whole project. We fit the way you already work.
Support After Launch
Clear handover docs, a codebase walkthrough and optional maintenance plans with agreed response times.
Industries We Serve
APIs and Integrations We Deliver
Most of our API work connects businesses to payments, shipping, identity and data providers.
Payments & Fintech
Shipping & Logistics
Identity & KYC
Blockchain & Web3
Healthcare Data
ERP & Accounting
Marketplaces
IoT & Telematics
Engagement Models
Work With Us Your Way
Choose the model that fits your timeline, budget, and internal capacity.
Fixed Price
Best for projects with a clear scope and a defined list of deliverables.
Ideal for
Most Popular
Dedicated Team
A full-time team that works inside your tools and rituals, like your own in-house developers.
Ideal for
Time & Material
Pay for the hours actually worked. Good when requirements are still taking shape.
Ideal for
FAQ
API Development FAQs
Quick answers to what most clients ask before getting started.
REST is simpler and works well for most mobile apps and partner integrations. GraphQL helps when clients need flexible queries and you want to avoid over-fetching. We recommend one based on who will use the API.
Yes. Every API we ship includes an OpenAPI (Swagger) spec, a Postman collection and an interactive docs page, so other developers can integrate without calling your team.
We use versioned URLs such as /v1 and /v2 with deprecation notices. Existing consumers always keep a working endpoint, and breaking changes are never pushed silently.
Yes. Rate limits, API key management, IP allowlists, signed requests (HMAC) and alerts for unusual traffic are part of our standard API security setup.
Yes. We regularly integrate Razorpay, Stripe, courier and shipping APIs, KYC providers, SMS and WhatsApp gateways, with retries and monitoring so failures never go unnoticed.