Custom Integration
Connect systems that no off-the-shelf connector supports.
- Third-party API integration
- Legacy system connectivity
- Webhook and event handling
When no connector exists, the answer is a custom API integration. RASPSYS designs and builds REST integrations with the authentication, error handling, and documentation that keep them supportable.
Anyone can make an API call succeed once. The engineering is in what happens on the four-hundredth call, when the token expired and the endpoint rate-limited you.
Connect systems that no off-the-shelf connector supports.
OAuth, API keys, and token lifecycles handled properly.
REST, Bulk, and Streaming API integration built around governor limits.
Rate limits, retries, and idempotency designed in from the start.
If you are publishing an API, it needs a contract people can build against.
Visibility into latency, error rates, and quota consumption.
A structured engagement model that de-risks delivery and gets working functionality into your team's hands early.
We read the target API docs properly and confirm what it can actually do.
Auth flow, data contract, error handling, and retry strategy.
Integration built with logging and tests against a sandbox.
Rate limit, failure, and edge-case testing before production.
Monitoring and maintenance as the upstream API changes.
Most REST API engagements start with a short discovery call rather than a full proposal. RASPSYS LLP will review your current systems, tell you what is realistically achievable, and give you an honest view of scope and cost - with no obligation.
We are a Salesforce and CRM consultancy serving clients across the UK, US, UAE, Canada, and Australia - with delivery teams that work in your time zone.
We test failure modes and rate limits, not just the happy path.
Supporting API and integration work across the UK, US, UAE, Canada, and Australia.
Governor limits, Bulk API patterns, and Platform Events are routine work for us.
The questions we are asked most often about REST API.
When the volume is low enough that platform licensing is not justified, when the logic is too specific for a connector, or when you already have engineering capacity to own it. An iPaaS wins when you need many integrations, non-developers maintaining them, or built-in monitoring and governance.
By choosing the right API for the job. Bulk API for large data volumes, Composite for related-record operations to reduce call count, and Platform Events for asynchronous decoupling. We also design for the daily API request allocation, which is the limit most integrations actually hit first.
It will. We build with version pinning where the vendor supports it, log all responses so a schema change is visible immediately rather than as a silent failure, and set up alerting on error-rate spikes. Ongoing support retainers exist largely because upstream APIs deprecate on their own schedule, not yours.
Yes. Every integration ships with an architecture note, the auth flow, endpoint and payload reference, error handling behaviour, and a runbook for common failures. If we publish an API for you, it also gets an OpenAPI specification.
End-to-end Salesforce implementation, customisation, and managed services.
Connect Salesforce to the ERP, finance, and operational systems you already run.
Browse the full range of CRM, integration, and development services RASPSYS LLP delivers.
Book a free 30-minute call with a RASPSYS consultant.
We will look at the API you need to integrate and scope it honestly.