Custom API development services
I design, build, and connect APIs — REST endpoints, webhooks, and two-way syncs — so your CRM, data vendors, spreadsheets, and internal tools stop needing a human in the middle.
Scope
Most of what I ship falls into six buckets — from brand-new endpoints to bridging a system that was never meant to be automated.
REST/JSON endpoints with authentication, rate limits, documentation, and versioning — written in Python or Node and hosted on Render or your own cloud.
CRM ↔ data vendor ↔ email ↔ calendar ↔ Sheets. HubSpot, Google Workspace, Calendly, Stripe, Twilio, and anything else with an API.
Fire on a form submit, a payment, or a task change — with retries, idempotency, and dead-letter logging so nothing silently disappears.
Pull, dedupe, enrich, score, and deliver on a schedule, keeping a ledger so the same record is never sent twice.
Wrap OpenAI or Anthropic behind your own API so your apps and spreadsheets call one clean endpoint with your prompts, guardrails, and logging.
CSV drops, email parsing, and browser automation as a last resort — bridged into a real API the rest of your stack can call.
Process
01
Free, 30 minutes. We map the systems, the data moving between them, and the manual step you want gone.
02
A one-page spec: endpoints, payloads, failure handling, a fixed price, and a date.
03
Working endpoints in days, not months. You get staging access and logs from day one.
04
Deployed to your cloud or mine, with monitoring and a handoff doc so anyone can maintain it.
Case study
Employee augmentation · API-driven pipeline
Reads open orders from CRM tasks via API, pulls records from two data-vendor APIs with a scoring cascade, dedupes against a 1M+ contact ledger, enriches phones through a third API, emails each client their file through the Gmail API, and closes the CRM task. It runs unattended every month.
Why me
No account manager relaying requirements. The person on the call is the person shipping the endpoints.
A one-page spec with a number on it, so there's no change-order machine turning a small build into a retainer.
I've run these systems in production for two years, so authentication, retries, logging, and rate limits aren't new problems.
FAQ
Most integrations are fixed-price from a one-page scope after the audit call; small connectors take days, full pipelines a few weeks. You'll know the number before any code is written.
Python and TypeScript/Node for services, Google Apps Script when the work belongs inside Sheets, hosted on Render, Google Cloud, or your own infrastructure.
Usually. CSV exports, email parsing, or browser automation can be wrapped behind a real API so the rest of your stack never knows the difference.
You do. Everything ships in your repo with a handoff doc; there's no lock-in and no licence fee.
Yes — OAuth or API keys, secrets kept out of code, least-privilege scopes, and logging that lets you audit every call.
Monitoring and a maintenance window are included in the scope; ongoing support is available monthly if you want it.
Let's Talk
Whether you need a workflow automated, an AI assistant built, or two systems finally talking to each other, let's build it.
Or send a message