APIs that other systems can actually rely on.
We design and build APIs, and connect the systems that refuse to talk to each other — versioned, documented, authenticated and rate-limited, with webhooks that retry instead of losing events.
- OpenAPI documentation generated from the code
- Versioned so you can change things without breaking clients
- OAuth 2, API keys or JWT as appropriate
- Rate limiting and abuse protection
- Webhooks with signing, retry and replay
- Integrations with ERP, CRM, payment and logistics systems
What we build.
Everything API Development & Integration includes — designed, built and shipped for you.
OpenAPI generated from the implementation, so the docs cannot drift away from what the API actually does.
Additive change by default; breaking changes get a version.
OAuth 2, scoped keys, rate limits and audit logging.
Signed payloads, exponential retry, a dead-letter queue and a replay endpoint — so a few minutes of downtime on the receiver is not silent data loss.
ERP, CRM, accounting, logistics and payment systems connected.
Contract tests so a deploy cannot silently break a consumer.
How we work.
Discover
Goals, content and scope turned into a fixed plan and quote.
Design
A modern UI you review and sign off before development.
Build
Clean, tested code shipped in reviewable milestones.
Launch
Deploy, optimize Core Web Vitals, and support.
API Development & Integration by the numbers.
We design and build APIs, and connect the systems that refuse to talk to each other — versioned, documented, authenticated and rate-limited, with webhooks that retry instead of losing events.
Scale Us vs the alternatives.
An honest look at building API Development & Integration with us versus the usual options.
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Scale Us
recommended |
Freelancers
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Big agencies
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|---|---|---|---|
| Fixed scope & quote | |||
| You own the code & IP | |||
| Senior, in-house team | |||
| Products + services in one | |||
| Support after launch | |||
| Transparent pricing |
More under Web Development.
Questions answered.
Still unsure? Email contact@scaleus.in — a real human replies inside 4 hours.
Can you connect our systems that do not have APIs?
Often yes — through database-level integration, file exchange, scraping where permitted, or an adapter service. We will tell you honestly when something is not safely automatable.
REST or GraphQL?
REST for most integrations and public APIs. GraphQL when clients need to shape their own queries across a rich graph. We will not push GraphQL where REST is simpler to operate.
Can we hire a developer full-time instead of a fixed-price project?
Yes. Dedicated engineers are available monthly, full-time or part-time, with a named developer and direct communication rather than an account manager relay. Most clients start with one fixed-scope build and move to a monthly team once they have seen the work.
How quickly can you start?
Onboarding takes under a day and a first working draft usually lands within two to three days. We keep overlap with US, UK and Australian business hours so you are not waiting a full day for each reply.
How much does this cost?
Most single-scope builds land between $2,500 and $4,000 as a fixed price. Multi-location or heavily integrated work runs $10,000 to $25,000, and a full platform build is $25,000 to $50,000. Once live, managed support is $900 to $1,500 a month. We quote fixed scope so you are not exposed to an open-ended hourly meter.
Who actually does the work?
Our own engineers, not a subcontracted chain. The team has delivered production apps as a Tier 1 delivery partner to a $1.3B-valuation UK app platform serving US and UK SMBs, plus our own products running in 60+ countries. You get named engineers and a direct line to them.
Let’s build
something great.
Tell us what you need — a real human replies within 4 hours. We work with teams worldwide.
