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Hexagon is reshaping industries through smarter systems, streamlined workflows, and bold digital innovation.
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Hexagon is reshaping industries through smarter systems, streamlined workflows, and bold digital innovation.
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Build APIs That Expose the Right Business Capabilities Without Losing Control of Data or Change.
Hexagon designs and develops custom APIs for web applications, mobile products, SaaS platforms, partners, devices, data services, and internal systems. We define the API contract, consumers, business rules, authentication, validation, documentation, versioning, testing, monitoring, and ownership required for reliable long-term use.
- Consumer-first design
- Clear contracts
- Secure access
- Versioned change
Founded in 2007
U.S.-Led Discovery
Global Engineering
300+ Software Projects
APIs Fail When They Expose Technical Tables Instead of Stable Business Capabilities.
An endpoint may work for one application and still become difficult to reuse because consumers depend on internal field names, undocumented behavior, inconsistent errors, weak permissions, or changes that break existing clients.
Hexagon begins with the consumer, business capability, record ownership, transaction, service boundary, security, expected load, failure behavior, and change model. The API is then designed as a governed interface—not an accidental extension of the database."
An API Must Be Designed Around Its Consumers and Business Capabilities
CONSUMERS
Web application · Mobile application · Partner · Customer · Internal team · Device · Automation · Reporting platform
API CAPABILITIES
Identity · Accounts · Orders · Payments · Projects · Documents · Scheduling · Inventory · Cases · Notifications · Analytics
API CONTRACT
Resources · Operations · Schemas · Validation · Errors · Pagination · Filtering · Events · Limits · Versions
BUSINESS SERVICES & DATA
Business rules · Source systems · Transactions · Authoritative records · Queues · Databases · External services
Which API Path Fits the Requirement?
| Situation | Recommended Path | Typical Deliverable |
|---|---|---|
 A platform already provides a suitable documented API for the approved workflow. | CONSUME & INTEGRATE | Authentication, mappings, validation, orchestration, testing, monitoring, and support. |
| An existing API works but lacks required operations, documentation, consistency, security, or lifecycle controls. | EXTEND OR MODERNIZE | Gap review, contract updates, new endpoints, deprecation plan, documentation, tests, monitoring, and migration. |
| An internal application or legacy platform must expose approved capabilities to other applications. | BUILD AN INTERNAL API | Service boundaries, contracts, authentication, business rules, data access, tests, documentation, and operations. |
| A SaaS product or business platform must provide stable access to customers, partners, or external developers. | BUILD AN API PRODUCT | Consumer model, tenant and permission rules, contracts, sandbox, documentation, keys, limits, webhooks, versions, analytics, and support. |
Six Ways Hexagon Can Design and Develop APIs
API Discovery & Contract Design
Define consumers, capabilities, resources, operations, schemas, errors, security, limits, versions, events, documentation, and ownership before build.
REST, GraphQL & Service API Development
Develop approved interfaces for applications, mobile products, business services, data, internal platforms, and external consumers.
Partner, Customer & Developer APIs
Create governed access for partners, customers, marketplaces, integrations, and external developers with keys, permissions, documentation, limits, and support.
Mobile, Web & SaaS Backend APIs
Build backend capabilities for authentication, profiles, workflows, transactions, notifications, files, subscriptions, administration, and analytics.
API Modernization & Version Migration
Improve legacy endpoints, security, consistency, performance, documentation, test coverage, observability, versions, and consumer migration.
API Documentation, Testing & Lifecycle Support
Create machine-readable specifications, examples, sandbox guidance, test automation, monitoring, analytics, incident procedures, release notes, and deprecation support."
Choose the Page That Matches the Primary Technical Need
API Development
Create a new interface or modernize an existing API so approved capabilities can be reused by applications, partners, devices, products, or teams.
API Integration Services
Connect existing applications and APIs so records, events, and workflows move reliably between systems.
API Integration Gap Review
Diagnose missing data, duplicate records, delays, failures, mapping problems, weak monitoring, and unclear ownership in an existing connection.
System Integration
Plan and connect the wider enterprise environment across CRM, ERP, cloud, databases, legacy applications, departments, and operational processes.
Proof in Practice: Orriant
OR
Orriant
VERIFIED SCOPE
Custom APIs
Scheduling services
AI-platform services
Proprietary applications
Mobile applications
CRM and survey integration
SUBHEADING
APIs Connecting Proprietary Wellness Platforms With Scheduling and AI Services
CLIENT CONTEXT
Orriant operates proprietary wellness platforms and mobile applications supporting coaching, health programs, records, communication, and reporting.
THE API REQUIREMENT
The application environment required reusable interfaces with scheduling and AI platforms alongside CRM and survey integrations.
WHAT HEXAGON DELIVERED
Orriant’s public testimonial states that Hexagon built several APIs with scheduling and AI platforms as part of a long-term systems-development partnership.
Recognized for Technology Innovation and Delivery Excellence
Hexagon IT Solutions has earned positive client ratings and recognition from independent technology and business publications for custom software development, digital transformation, innovation, and technology delivery.
4.9/5 Client Rating
DesignRush
Best Digital Transformation Consultancy
Corporate Vision · 2025 Winner
Innovation Excellence Awards
CIO Bulletin · 2024
Recognized in 2026 Technology Rankings
Software Development & IT Services
Founded in 2007, Hexagon combines U.S.-led discovery with global engineering and delivery capabilities to help organizations modernize operations through custom technology solutions.
From API Capability Discovery to Versioned Production Operation
1
Consumer & Capability Discovery
Define consumers, business capabilities, workflows, records, systems, permissions, expected usage, and success criteria.
2
Contract & Service Design
Design resources, operations, schemas, validation, errors, events, versioning, limits, idempotency, and service boundaries.
3
Security & Operational Design
Define authentication, authorization, secrets, rate limits, data sensitivity, logging, monitoring, incidents, and ownership.
4
Development & Documentation
Build endpoints, services, business rules, data access, webhooks, queues, specifications, examples, and developer guidance.
5
Contract, Functional & Performance Validation
Test schemas, errors, permissions, limits, retries, concurrency, failure cases, security, performance, and consumer acceptance.
6
Release, Adoption & Lifecycle
Publish the version, onboard consumers, monitor use, manage incidents, issue release notes, evolve contracts, and retire versions through an approved deprecation plan.
A Governed API Product Connecting Consumers With Stable Business Services
Business Services
Identity
Accounts
Orders
Payments
Projects
Documents
Scheduling
Notifications
Data services
Consumers
- Web
- Mobile
- SaaS
- Partners
- Customers
- Internal teams
- Devices
- Automation
Api Access & Contract
Gateway
Authentication
Authorization
Keys
Schemas
Validation
Rate limits
Versions
Documentation
Data & Operations
Databases
Source systems
Queues
Logs
Metrics
Traces
Alerts
Analytics
Incident and release management
Built for Secure Access, Clear Developer Experience, and Controlled Change
Identity & Permission Boundaries
Define consumers, applications, tenants, users, scopes, roles, least privilege, key rotation, secrets, and access review.
Contract Quality & Developer Experience
Provide consistent resources, errors, examples, specifications, onboarding, sandbox guidance, changelogs, support contacts, and test assets.
Reliability & Observability
Use validation, timeouts, retries, idempotency, queues, rate limits, logs, metrics, traces, alerts, incident procedures, and capacity planning where required.
Versioning & Deprecation
Define compatible change, version strategy, migration period, consumer communication, usage analytics, sunset criteria, and ownership."
How API Development Engagements Are Scoped
Defined Application API
Best for a web, mobile, internal, or partner application requiring a manageable set of stable capabilities and consumers.
Multi-Service or Partner API
Best for several applications, partners, workflows, events, identities, services, and versioned contracts.
API Product or Modernization Program
Best for a SaaS platform, external developer ecosystem, legacy API estate, shared services, governance model, or long-term API lifecycle."
Custom AI Application Questions
What is custom API development?Custom API development creates a governed interface that exposes approved business data and capabilities to applications, mobile products, partners, devices, customers, or internal teams.
What is the difference between API development and API integration?API development creates or modernizes the interface. API integration uses existing or custom interfaces to connect applications, exchange records, and trigger workflows.
Do you develop REST and GraphQL APIs?Yes. The appropriate interface style is selected based on consumers, operations, data shape, workflow, performance, governance, and support requirements rather than a default technology preference.
Can you modernize an existing API without breaking current consumers?Yes. Modernization can use compatible changes, new versions, adapters, usage analysis, consumer testing, documentation, migration windows, and a controlled deprecation plan.
How do you secure custom APIs?API security may include authentication, authorization, scoped access, encryption in transit, secrets management, rate limits, input validation, logging, network controls, key rotation, and least privilege based on the environment and data.
How long does custom API development take and what does it cost?Timeline and cost depend on consumers, capabilities, services, data, security, versions, documentation, testing, performance, environments, monitoring, and support. A defined application API may take several weeks, while an API product or modernization program may require several months.
Who owns the API source code and documentation?Ownership and licensing depend on the agreed delivery model. Repository access, reusable components, specifications, credentials, environments, hosting, maintenance, and handover are defined in the project agreement."
Reviewed by Daks J.
Founder & CEO, Hexagon IT Solutions
Daks founded Hexagon IT Solutions in 2007 and leads business discovery and solution planning for CRM, ERP, custom software, APIs, integrations, payments, AI, content platforms, and industry software engagements. He works with clients to connect operational requirements, technology decisions, and long-term delivery planning.
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