Secure, Scalable APIs to Unite Legacy Systems with Your ERP/CRM or CMS

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OpenAPI contract page
GraphQL schema explorer
Legacy SOAP wrapper
ODBC source mapping
REST endpoint design
Token OAuth2 settings
JWT claims viewer
mTLS certificate config
From SOAP to REST/GraphQL - bridges that last

Modern APIs for Real-World Systems

We engineer custom APIs and integration layers that connect legacy databases and applications with modern platforms such as SAP, Salesforce, Dynamics, HubSpot, Zoho, NetSuite, WordPress, Shopify, and headless CMSs. Our work spans REST/GraphQL design, SOAP wrapping, ETL pipelines, message queues, and webhooks - built with strong contracts (OpenAPI/AsyncAPI), versioning, and observability. We handle data modeling, mapping, deduping, and conflict resolution; secure access via OAuth2/JWT; and implement rate limiting, retries, and idempotency for reliability. Whether real-time sync or batch migration, we ship APIs your teams can trust and scale.

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Rate limit policy
IP allowlist screen
Webhook subscription UI
Event bus topology
Retry and backoff rule
Idempotency key logic
Clean contracts, safer data, faster launches

Why Custom APIs Beat One-Off Connectors

Reusable APIs shorten future projects, reduce manual ops, and unlock data across teams. We define stable domains and endpoints, publish OpenAPI specs, and supply SDKs/examples so developers integrate faster. Webhooks and event buses keep systems in sync without polling. For security, we apply scopes, mTLS, IP allowlists, secrets rotation, and audit logs. With CI/CD, blue-green deployments, and feature flags, changes roll out safely. Dashboards surface latency, error budgets, and throughput so you meet SLAs. Result: fewer outages, cleaner handoffs, and integrations that survive vendor changes.

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CDC stream pipeline
ETL batch scheduler
Schema mapping tool
Data dedupe rules
Why Choose iPistis for API Engineering

iPistis technologies Pvt. Ltd.?

Battle-tested API patterns for real uptime

Standards-Driven

OpenAPI/AsyncAPI, JSON:API best practices, versioning, and deprecation policies by design.

Security First

OAuth2/JWT, mTLS, IP allowlists, rate limits, audit logs, and secrets management.

Built to Scale

Async queues, caching, sharding, and failover patterns to handle enterprise loads.

Everything required to design, build, and run APIs

What We Offer in Custom API Development

Discovery, architecture, development, security, DevOps, docs, and ongoing support.

API Architecture

Domain modeling, contracts, versioning, SLAs, rate limits, and observability strategy.

Legacy Wrappers

Wrap SOAP/ODBC/CSV/flat-files into REST/GraphQL with validation and caching.

ERP/CRM Bridges

Integrations for SAP, Salesforce, Dynamics, Zoho, HubSpot with sync and webhooks.

CMS Connectors

WordPress, Shopify, headless CMS - inventory, orders, content sync, and SSO.

ETL & Migration

Schema mapping, dedupe, CDC, bulk loads, and safe cutover with rollback plans.

DevOps & Docs

CI/CD, canary releases, error budgets, OpenAPI portals, SDKs, and runbooks.

Get a Future-Proof Integration Layer

Connect legacy + ERP/CRM/CMS with secure, well-documented APIs your teams love to use.

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Conflict resolution policy

Custom API Development - FAQs

Learn about timelines, security, data mapping, migrations, SLAs, and how we connect legacy apps with ERP/CRM or CMS reliably.

  • Can you work with our legacy database?

    Yes. We wrap ODBC/JDBC/CSV/flat-files or SOAP services and expose modern REST/GraphQL endpoints.

  • How do you secure the APIs?
  • Do you support real-time sync?Interface

    Yes - webhooks, queues, and CDC streams for near real-time updates; batch ETL for large moves.

  • Can we get docs and SDKs?

    We publish OpenAPI portals with examples and auto-generated SDKs for quick developer onboarding.

APIs engineered for longevity - not just the demo

What Makes Us Different

We build integration layers that survive vendor churn and roadmap changes. Our contracts isolate your core data model from external quirks, so a CMS swap or ERP upgrade doesn't break everything. We emphasize testability (contract tests, mocks, replay tools), performance (caching, pagination, back-pressure), and resilience (retries, idempotency keys, circuit breakers). Security is layered - authN, authZ, token scopes, and compliance-friendly logging. With clear docs, examples, and sandboxes, your teams ship features faster while support tickets drop.

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Error budget dashboard
Latency percentile chart
Tracing spans timeline
Log aggregation panel
Crafted by us

Custom API Development & Integrations Packages

Contact our sales team for best quotation.
API uptime status
Throughput trends graph
Pagination strategy doc
Cache hit ratio chart
Queue consumer panel
Circuit breaker status
Service dependency map
Why Are we Right Choice for

Custom API Development & Integrations

We ship APIs with clear docs, safe rollouts, and production-grade monitoring.

Why

Ship Integrations Your Business Can Trust

Replace brittle scripts with a resilient API layer. We'll model the data, secure the endpoints, and automate deployments - so legacy apps, ERPs/CRMs, and CMSs stay in sync. Get a roadmap and effort estimate after a quick discovery call.

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Blue-green deploy
Canary release monitor
Versioning strategy doc
Deprecation calendar
We are working with some awesome clients

Valuable Custom API Development & Integrations clients

SDK download portal
Try-it API console
Sandbox environment link
ERP connector settings
Salesforce bridge config
Dynamics integration map
HubSpot sync options
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Drop us Message for any Query

We are a team of hard-core nerds and we are bringing more of you that marketing advantage with top rate ecommerce websites.

WordPress connector setup

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