API integrations for business workflows
Custom API integrations that connect websites, CRMs, payment systems, data tools, and internal workflows.
API integration work connects two or more systems so data moves between them automatically and reliably, with auth, retries, validation, and monitoring handled properly. It is the plumbing between a website form and a CRM, a payment tool and a database, or an internal app and a vendor API. It is for teams whose tools each work fine on their own and do not talk to each other.
The problem
The first successful API call is the easy part and it feels like the finish line. Everything expensive happens afterward, in the failure cases nobody demoed.
- A person re-types the same record into a second system several times a day.
- An integration exists but nobody knows when it fails, so bad data accumulates quietly.
- A retry created three duplicate records because nothing was idempotent.
- A vendor rate limit was discovered in production during the busiest hour.
- The integration was built by someone who left, and no one will touch it.
What we build
The data contract
Which system owns which field, what happens on conflict, and what a valid record looks like. Decided before code, because this is where integrations actually go wrong.
Auth and token handling
OAuth flows, refresh handling, and credentials in a secrets manager rather than in a config file or a shared document.
Idempotent writes
Keys or fingerprints so a retry updates rather than duplicates. This is the difference between a safe integration and one nobody dares re-run.
Rate limits, pagination, and retries
Backoff that respects documented limits, pagination that survives interruption, and a clear split between retryable and fatal errors.
Validation before the write
Bad payloads rejected at the boundary with a useful error, rather than written into a CRM and discovered by a salesperson.
Monitoring and alerting
Logs recording outcome, object IDs, and failure category without leaking sensitive values, plus alerts when the integration stalls or starts erroring.
What you get at handoff
- Integration code in your repository, deployed through your own pipeline.
- The data contract written down, including the conflict rules.
- A runbook per failure category, with the replay procedure.
- Credentials in your secrets manager, held by you.
- Tests covering the failure paths, not just the happy one.
Stack
Protocols
REST, GraphQL, Webhooks, SOAP, SFTP
Common systems
Salesforce, HubSpot, Stripe, QuickBooks, Slack, Microsoft Teams, Jira
Language
Python, TypeScript
Where it runs
AWS Lambda, Cloud Run, Airflow, Your existing services
Reliability
Idempotency keys, Exponential backoff, Dead-letter queues, Structured logging
Related services
FAQ
Why not just use Zapier or Make?
Use them when they fit. They are good at simple trigger-and-action work and cheap to try. The limits show up with conditional logic, large volumes where per-task pricing hurts, data that needs real validation, or failures you need to diagnose and replay. We will tell you when the no-code option is the right answer.
What happens when the vendor API goes down?
Transient failures retry with backoff. Sustained outages queue the work rather than dropping it, and alert someone. When the vendor recovers, the queue drains without creating duplicates, which is what the idempotency work is for.
Are webhooks enough on their own?
Webhooks are a good trigger and a bad guarantee. They can arrive twice, out of order, or not at all. Production webhook handling needs signature verification, duplicate suppression, and usually a periodic reconciliation job that catches anything missed.
How long does an integration take?
It is driven by the API and the edge cases, not the number of fields. A well-documented REST API with sane auth moves quickly. Undocumented behavior, unusual auth, or a system that changes shape between environments takes longer. We look at the docs and make real calls before quoting.
Who owns it afterward?
You do. Code in your repository, credentials in your secrets manager, deployment through your pipeline. The runbook is written for someone who was not part of the build.
Ready to scope APIs?
Send the workflow, tool stack, or reporting problem. We will tell you what should be automated, what should stay manual, and what is worth building first.