Systems integration and API development that connects what you already run.
CRM to billing, HIS to claims pipe, WhatsApp to CRM, payments to accounting.
Typical scope
- CRM integrations: Salesforce, HubSpot, Quotarider
- Payments: Razorpay, Stripe, webhooks with signature verification
- Messaging: WhatsApp Business API, email (SMTP/IMAP), telephony (Exotel-class, Twilio)
- Healthcare: HIS exports, NHCX FHIR R4, TPA/insurer portals, EDI 837P/835
- Public APIs, partner APIs and webhook platforms
- Scheduled sync jobs, retries, dead-letter queues and monitoring
Tools we reach for
Chosen because we run them in production ourselves, and because you can hire for them afterwards.
Scope
One call. Written scope, fixed price, date.
Build
Weekly demos in your repo. Tests and security included.
Ship
Go live, hand over, stay on retainer or run it yourself.
Secured, automated, and running on AgentOS
Every integration we wire up is secured and automated, typed, scoped and watched. Every agent runs on XDQ AgentOS, guardrails, human gates and an audit trail included.
Questions we get about systems integration & apis
Which systems have you integrated?
Razorpay, Supabase, Twilio/Telnyx, SMTP/IMAP mailboxes, hospital HIS exports, NHCX bundles and EDI clearinghouses, among others.
How do you keep integrations safe?
Signed webhooks, DNS-resolved SSRF guards on outbound calls, secret rotation with grace periods and an append-only ledger of every write-back.
Can integrations run without a full rebuild?
That's the point, we sit next to your existing systems and connect them; nothing gets replaced.
Pairs well with
Custom Software Development
Custom software development that ships in weeks, not quarters.
Mobile App Development
Mobile app development for iOS and Android from one codebase.
Web & SaaS Product Development
SaaS product development, from MVP to multi-tenant platform.
Systems Integration and API Development: More Questions Answered
How long does an API integration take?
A single API integration between two well-documented systems typically takes one to three weeks, including testing and monitoring. Integrations involving legacy systems, file-based exchanges or healthcare standards such as FHIR and EDI usually take four to eight weeks. Every integration we deliver includes retries, error alerts and logging, so failed syncs are visible and recoverable instead of silently losing data between systems.
How much does system integration cost?
A focused integration, such as connecting a payment gateway or WhatsApp to your CRM, usually falls in the USD 1,000 to 5,000 band. Multi-system projects with data mapping, sync jobs and monitoring typically sit in the 5,000 to 20,000 band, while integration platforms or public partner APIs reach 20,000 to 50,000. We give a fixed quote after reviewing a brief and the documentation for each system.
Can you build a public API for our SaaS product?
Yes, we design and build public and partner APIs, including authentication with OAuth 2.0 or API keys, rate limiting, versioning, webhooks and developer documentation. We start from the use cases your partners need, define the resources and events, then build and test against them. A first public API version for an existing product usually takes four to six weeks, with a sandbox environment for partners to test against.
How do you integrate a CRM with billing and accounting systems?
We integrate a CRM with billing and accounting by agreeing which system owns each record, then syncing customers, deals, invoices and payments in both directions with clear rules for conflicts. Webhooks handle real-time updates, and scheduled jobs reconcile anything missed. Every write is logged. Typical projects connecting Salesforce, HubSpot or Quotarider to Stripe, Razorpay or accounting software take two to five weeks.
What happens when an integration fails?
When an integration fails, the message is retried automatically with increasing delays, and if it still fails it moves to a dead-letter queue for review instead of being lost. An alert reaches the right person with the error and the affected record. Once the cause is fixed, queued messages can be replayed safely. We document these recovery steps in the handover so your team can operate the integration independently.
From USD 49 or INR 2,999 a month. A person approves every step.