Website <-> CRM
Capture enquiries once, validate the record and keep ownership visible to sales.
API & system integration
API Integration
Scallar connects applications, CRMs, ERPs, payment systems, SaaS platforms, databases and messaging services into reliable operating workflows.
ApplicationsCRM / ERPPaymentsSaaSDatabasesMessaging
Live integration map
Systems, rules and observable outcomes
CRM
Website
API gateway
AuthenticateValidateTransformApply logic
Payment
Email
WhatsApp
Logging + monitoring + retry ownership
Connection intent
What are you trying to connect?
Start with the business event and source of truth. The endpoint is only one part of the operating workflow.
Ecommerce <-> Payments
Coordinate order, payment, refund and fulfilment states without duplicate transactions.
Application <-> Third-Party API
Bring maps, identity, messaging or specialist services into a product with controlled failures.
CRM <-> Marketing Platform
Synchronise consent, lifecycle state, campaign activity and sales handoff.
ERP <-> Web Platform
Exchange approved product, inventory, customer or order data across operational boundaries.
Legacy System <-> Modern Platform
Use a documented facade, bridge or scheduled exchange while modernization progresses.
Integration services
Integration engineering across the stack
A clear contract, data owner and failure path make the connection supportable after the first successful request.
Third-Party API Integration
Connect established provider APIs to customer and internal workflows.
Custom API Development
Design controlled interfaces for product, partner and operations use cases.
REST API Integration
Build predictable request and response exchanges with explicit contracts.
GraphQL Integration
Use flexible queries where clients need carefully governed data access.
Webhook & Event Integration
Respond to orders, payments, forms, messages and business events.
Legacy System Integration
Create maintainable boundaries around older applications and data.
Payment Gateway Integration
Coordinate payment intent, status, refunds and reconciliation states.
CRM / ERP Integration
Keep system-of-record ownership and field movement unambiguous.
Request to outcome
An integration is a workflow, not just an endpoint.
Select a use case to see authentication, validation, transformation, business rules, destination state and monitoring work as one system.
CRM integration
Website form to CRM + sales owner
Turn a qualified website enquiry into one owned CRM record.
01Website form
02Authenticate
03Validate lead
04Transform fields
05Apply routing rule
06Create or update record
07Log + alert
08CRM + sales owner
Business outcome: The correct sales owner receives a complete, traceable record.
CRM
Turn a qualified website enquiry into one owned CRM record.
Payments
Keep order and payment state consistent after an authorization event.
Ecommerce
Move approved catalogue, stock and order events between commerce and operations.
Messaging
Convert a customer event into a permissioned, observable notification.
Data Sync
Exchange approved records between systems with reconciliation.
Connection patterns
Different systems need different connection patterns
The method follows timing, volume, reliability, provider limits and the operational cost of stale or incorrect data.
REST
Common request and response integrations with stable resource contracts.
GraphQL
Flexible, governed queries where clients need different data shapes.
Webhooks
Event-driven notifications such as payment, form and order changes.
WebSockets
Real-time connections where a persistent exchange is justified.
Scheduled Sync
Periodic batch movement when immediate exchange is unnecessary.
Queue / Events
Resilient asynchronous workflows with retry and back-pressure needs.
Business system connectors
Systems we connect
Platform names describe integration capability, not partnership or certification. Each scope is verified against the current provider API.
CRM
HubSpot / Zoho / Salesforce / EspoCRM
Payments
Stripe / Razorpay / Provider APIs
Ecommerce
Shopify / WooCommerce / Custom stores
Messaging
WhatsApp / Email / SMS providers
Cloud
AWS / Google Cloud / Serverless
Analytics
GA4 / Looker Studio / Data stores
Marketing
Forms / Campaign tools / Automation platforms
Internal Systems
ERP / Databases / Legacy applications
Reliability and security
Production integrations need failure handling.
RequestAuthValidateExecuteVerifyLogRetry / alert
Authentication
Use API keys, OAuth, signed requests or tokens according to the provider contract.
Validation
Check required inputs, response shapes and business invariants before state changes.
Rate Limits
Respect provider limits and design controlled backoff instead of uncontrolled retries.
Retries
Retry temporary failures safely and route persistent exceptions to an owner.
Idempotency
Prevent duplicated orders, payments or records where repeated requests are possible.
Logging & Monitoring
Expose failures, latency, volume and reconciliation signals to the responsible team.
Delivery process
From API documentation to production integration
- 01
Audit
Systems, documentation, credentials, constraints and operational consequences.
- 02
Map
Data models, events, sources of truth, owners and exception paths.
- 03
Design
Contracts, authentication, transformations, sequencing and failure handling.
- 04
Build
Controlled implementation with representative data and secure secrets.
- 05
Test
Success, failure, duplicate, timeout, rate-limit and reconciliation cases.
- 06
Deploy
Production credentials, monitoring, alerts, runbooks and ownership.
- 07
Maintain
Provider versions, schema changes, operational incidents and improvements.
Why Scallar
Reliable connections need operational ownership
The work is designed around real process, data and support responsibilities rather than a generic connector claim.
Workflow first
Understand the business event, decision and owner before writing a connector.
Failure states matter
Design the exception and recovery path alongside the successful path.
Data ownership stays clear
Document which system owns each record, field and correction.
Business systems stay connected
Treat integration as an operated workflow, not a one-time request.
Maintainability matters
APIs, schemas, credentials and volumes change after launch.
Documented implementation evidence
From Mortgage Enquiry to Loan Officer - Without Losing the Lead in Between
An experience-informed lead-response architecture for mortgage teams that need to connect acquisition sources, CRM ownership, approved follow-up and loan-officer action.
Read case studyIntegration knowledge path
Use a practical path from API discovery and field mapping to CRM/ERP integration, failure handling, legacy-system boundaries, testing, and handover.
Related operating systems
Follow the service graph from customer interface to integration, automation, messaging and measurement.
Explore API integration by city, industry and planning topic
By city
Common integration questions
Plan the connection before credentials change hands
Review scope, reliability, security, maintenance and investment before implementation begins.
View API integration pricingWhat does API integration include?+
API integration can include connecting apps, CRMs, payment gateways, WhatsApp, analytics, dashboards, internal tools, and third-party platforms through secure data flows.
Can Scallar build custom APIs?+
Yes. Scallar can build REST or GraphQL APIs, authentication flows, webhooks, data sync jobs, and backend services for business workflows.
How do you keep API integrations reliable?+
Reliable integrations need clear error handling, logging, retries, validation, permissions, documentation, and monitoring for failed syncs.
Can API integration support automation?+
Yes. APIs often power automation by moving lead, order, appointment, customer, or reporting data between systems without manual copy-paste.
Integration brief
Connect the systems behind your business.
Share the systems, data and outcome. We will identify the first workflow and the risks that need to be resolved.
Free growth consultation
Discuss your integration requirements
Tell us which systems need to connect, what data should move and what must happen when a request fails.
- A response from the right specialist
- A clear next step, not a generic sales pitch
- Your details are used only to respond to this request