opdevio

Freelance software development and engineering.

Backend systems, infrastructure and automation.

What I build

Backend and APIs

Services, integrations and data pipelines. Designed to be read by the next person as easily as the first.

Infrastructure

Containers, CI, deployment and the unglamorous plumbing that decides whether a release is calm or not.

Automation and tooling

The repeated manual work that quietly costs more than the software it supports.

Rescue work

Inherited systems, missing documentation, a build nobody can reproduce. Diagnosis before rewrite.

How it works

Scoped

A defined outcome and a price, agreed before work starts.

Tested

Shipped with tests that exercise the deliverable.

Yours

Your repository, your infrastructure, your accounts.

Also: data for the agent-payments economy

52% of x402 endpoints fail

We checked 10,811 listed endpoints against Coinbase's validator. 5,633 failed. The aggregates are free.

Check one before you pay it

A paid endpoint that fails validation may take the money and not deliver. Ask first, for a cent.

Or find out why yours is invisible

The exact checks your resource fails and what to change for each.

See the endpoints and prices →

The x402 conformance census → 52.1% of listed endpoints fail the catalogue's own validator. We measured all 10,811.