Connect Your SystemsFor Real Operations

TENSVA provides API strategy, custom API development, REST and GraphQL services, third-party integrations, webhooks, payment, CRM, ERP, e-commerce, communication and analytics connections, middleware, gateways, SDKs, documentation, testing, monitoring, modernization, and maintenance. The final scope is based on the workflow, systems, data, risk, and operating needs.

Yes. TENSVA can plan and build internal, partner, product, backend, data-service, or public APIs when the required domain, consumers, data, permissions, hosting, and maintenance model are defined. We can also assess whether extending an existing service is more practical than creating a new API.

A third-party API integration connects your application with an external platform so approved data or actions can move between them. It typically includes authentication, field mapping, validation, provider limits, error handling, testing, monitoring, and a plan for future API changes.

REST commonly exposes resource-based endpoints and uses standard HTTP behavior. GraphQL exposes a typed schema through which clients request specific connected fields. REST is often simpler for focused integrations; GraphQL can be useful for data-rich products with varied client needs. The better choice depends on the consumers, domain, caching, authorization, and operating complexity.

Yes, when the CRM provides suitable access and the workflow is feasible. A connection may capture leads, synchronize contacts, update opportunities, assign owners, log activity, or pass lifecycle events. Data ownership, consent, duplicate prevention, custom fields, CRM edition, and API limits must be reviewed first.

TENSVA can design and build appropriate store-to-ERP connections for products, inventory, customers, orders, payments, fulfillment, and reporting. The project should first define which system owns each record, how conflicts are handled, what timing is required, and how both systems will be reconciled.

Yes, for supported providers and regions after feasibility review. Work may cover checkout, subscriptions, invoices, refunds, failed-payment states, webhooks, idempotency, account access, and reconciliation. Provider approval and implementation do not make the full business automatically compliant; architecture and responsibilities must be assessed.

Often, yes. Options may include an existing legacy API, database access, file or SFTP exchange, an adapter, middleware, or a staged modernization layer. Feasibility depends on access, documentation, licensing, data quality, security, operational windows, and the risks of changing a business-critical system.

Useful inputs include the business workflow, systems, API documentation, sandbox access, test credentials, sample records, field mappings, business rules, error scenarios, security requirements, technical contacts, expected demand, and approval responsibilities. Discovery can identify gaps when these are not yet organized.

Controls may include OAuth 2.0, OpenID Connect, scoped tokens, API keys, role-based authorization, short-lived credentials, secret management, TLS, validation, rate limits, verified webhook signatures, environment separation, audit logs, and least-privilege access. The right design depends on the users, systems, data, and threat context.

Depending on the workflow, TENSVA may use stable external identifiers, idempotency keys, processed-event records, uniqueness rules, correlation IDs, and business-level duplicate checks. The integration also needs a defined policy for records that look similar but cannot be merged safely.

The design may retry temporary failures with backoff, queue work, pause calls through a circuit breaker, alert an owner, or route the case for human review. Permanent failures require a different response. Recovery, replay, reconciliation, and customer impact should be defined according to the consequence of delay or error.

Yes. TENSVA can assess the workflow, code, logs, mappings, authentication, provider dependencies, failures, and ownership. The recommendation may be a focused repair, improved tests and monitoring, a new middleware layer, or a staged replacement rather than an immediate rebuild.

Yes. Depending on scope, documentation may include an OpenAPI specification, interactive reference, authentication guide, request and response examples, error catalog, webhook guide, onboarding steps, version policy, changelog, and operating runbook.

TENSVA can develop client libraries for selected languages when an SDK will materially improve adoption. Scope may include typed models, authentication helpers, common operations, errors, examples, tests, packaging, and versioning. Each supported SDK also creates an ongoing maintenance responsibility.

There is no reliable universal timeline. Duration depends on the number of systems and workflows, documentation quality, authentication, sandbox access, field mapping, provider limits, data condition, security review, error scenarios, testing, stakeholder decisions, and deployment requirements. Discovery is used to produce a grounded plan.

Cost depends on scope, API or provider complexity, custom business rules, data transformations, environments, security, testing, migration, monitoring, documentation, and support. TENSVA reviews these variables before estimating rather than applying one fixed price to materially different integrations.

Ongoing support can be scoped for monitoring, incident analysis, provider-version changes, credential coordination, dependency updates, testing, documentation, and prioritized improvements. Coverage, response responsibilities, access, and support boundaries should be agreed explicitly.