ZeevTech Solutions is an API integration services company that builds REST APIs and connects them to the systems a business already runs — payment gateways, CRMs, ERPs, logistics providers, and legacy databases. We work in Node.js and Laravel. Most integration projects take 4 to 12 weeks and start at $4,000.
API integration is the practice of connecting two or more software systems so they exchange data automatically through their application programming interfaces. It replaces manual re-entry and spreadsheet exports with a defined contract covering the data mapping, authentication, error handling, and retry behaviour between the systems.
What do API integration services include?
API integration services cover building the API your product exposes, consuming the APIs your product depends on, and the middleware between them. That means endpoint design, authentication, data mapping, webhook handling, retry and reconciliation logic, monitoring, and documentation your team can maintain after handover.
REST and GraphQL API development with versioning and an OpenAPI specification
Payment gateway integration including webhooks, retries, and reconciliation
CRM, ERP, and accounting integrations such as Salesforce, HubSpot, and Zoho
Logistics, mapping, messaging, and identity provider integrations
Legacy and on-premise system integration over SOAP, SFTP, or direct database access
Scheduled sync jobs, queues, and background processing
How much do API integration services cost?
A single third-party integration typically costs $1,500 to $4,000. A production backend with several integrations costs $4,000 to $15,000, driven by the number of external systems and their reliability rather than by endpoint count. Ongoing capacity is available as a dedicated developer at $2,200 per month.
The cost driver is almost always the quality of the other system's API. A well-documented modern REST provider is a few days of work; an undocumented legacy endpoint that returns HTML on failure can take weeks to integrate safely.
Do you build APIs in Node.js or Laravel?
Both, chosen by workload. Node.js suits I/O-heavy APIs, real-time features, and teams already writing JavaScript or TypeScript on the front end. Laravel suits admin-heavy platforms, content and billing workflows, and teams with existing PHP infrastructure. The integration patterns are identical either way.
If you have no existing constraint, we default to Node.js with TypeScript so one language covers the API and the React or Next.js front end.
How do you integrate with a legacy or undocumented system?
We start with a written integration contract that defines the data mapping, the authentication method, the failure behaviour, and the retry policy before any code is written. Where documentation does not exist, we probe the live system in a sandbox and document what it actually does, not what it is meant to do.
A written data-mapping document agreed before implementation begins
An anti-corruption layer so the legacy data model never leaks into your product
Idempotency keys so a retried request cannot double-charge or duplicate a record
Dead-letter queues that capture failed messages instead of dropping them
Sandbox-first testing against the real system, never straight to production
What happens when a third-party API goes down?
The integration degrades rather than fails. Outbound calls run through queues with exponential backoff, writes are made idempotent so retries are safe, and the last known good data is cached so your product keeps serving users. Alerts fire on error-rate thresholds so your team hears about it before customers do.
Do you provide API documentation and handover?
Yes. Every API ships with an OpenAPI specification, browsable documentation, and a Postman collection, plus a runbook covering environments, secrets, and deployment. Documentation is written alongside the endpoints rather than retrofitted afterwards, so it does not drift out of date once your team takes over.
How we deliver api development & integration
1
Integration audit3–5 days
Systems, data flows, and API capabilities mapped; the integration contract written and agreed.
2
API design3–5 days
Endpoint contract, data model, and auth strategy fixed in writing before implementation.
3
Implementation sprints3–8 weeks
Endpoints and integrations built in two-week sprints against a live staging environment.
4
Error handling & hardening1–2 weeks
Retries, idempotency, rate limiting, and security review across every external call.
5
Load test & deploy3–5 days
Load testing, monitoring, alerting, and CI/CD pipeline setup.
6
Documentation & handover2–3 days
OpenAPI spec, Postman collection, and a runbook for your team.
Technologies we use
Node.js
Express
TypeScript
Laravel
PHP
PostgreSQL
MySQL
MongoDB
Redis
Docker
AWS
Proof
API Development & Integration We Have Shipped
Live products you can open and verify, plus platforms running in production today.
Fashion & E-Commerce
TrendiPeople
A London-based marketplace connecting customers with tailors, stylists, and personal shoppers — location-aware appointment booking, in-home services, secure payments, and provider ratings.
A unified operations platform — CRM pipeline, HRMS, inventory management, and analytics dashboards with role-based access and a full admin panel, from sales floor to leadership.
React
Node.js
MySQL
AWS
Online Grocery Delivery
GroceryBoo
A US-based grocery and meal delivery platform — customers browse fresh categories, order from preferred stores, pay in-app, and follow their delivery live with rider chat and long-distance delivery support.
Straight answers on cost, timelines, ownership, and delivery for api integration services.
How much does API integration cost?
A single third-party integration typically costs $1,500 to $4,000, and a production backend with several integrations costs $4,000 to $15,000. The main cost driver is the quality and reliability of the external system's API rather than the number of endpoints. Ongoing capacity is available at $2,200 per month.
How long does an API integration take?
A straightforward integration with a well-documented modern provider takes one to two weeks. A full backend with several integrations, authentication, and payment reconciliation takes four to twelve weeks. Undocumented legacy systems add time because the behaviour has to be discovered and documented before it can be relied on.
Can you integrate our app with our existing ERP or CRM?
Yes, and it is a common engagement. We integrate with Salesforce, HubSpot, Zoho, and custom in-house ERPs, including on-premise systems reachable only over VPN or SFTP. We build an anti-corruption layer so the ERP's data model stays contained rather than spreading through your product.
Do you build the API or just connect to existing ones?
Both. We build the REST or GraphQL API your product exposes to its own apps, and we consume the third-party APIs it depends on. Most projects need both halves, and having one team own the contract on each side removes the integration finger-pointing between separate vendors.
Which backend do you use — Node.js or Laravel?
Node.js for I/O-heavy APIs, real-time features, and teams already using JavaScript or TypeScript on the front end. Laravel for admin-heavy platforms, billing and content workflows, and teams with existing PHP infrastructure. If there is no existing constraint we default to Node.js with TypeScript so one language covers the whole stack.
How do you keep an integration secure?
We follow OWASP API Security guidance: validate every input at the boundary, enforce authorisation on every endpoint rather than only at login, rate-limit by client, encrypt data in transit and at rest, and keep credentials in a managed secret store. Dependency scanning runs in CI and fails builds on known vulnerabilities.
