An API that turns a simple invoice JSON into a compliant structured e-invoice for whichever country the buyer is in, and validates it before you send.
A rendering API that pins fonts, engine version, and metadata so the same input produces identical PDF bytes years from now.
A hosted API that ingests every transit agency in a metro area and serves one consistent schedule and arrival endpoint.
A metering service that attributes cloud, vendor, and token spend to individual accounts so a SaaS knows its real per-customer margin.
A small ingress service that accepts, verifies, and stores every inbound webhook, then redelivers to your app until it actually succeeds.
A service that continuously sends seeded test mail to real inboxes and tells you which providers are silently dropping your password resets.
A service that reads your Postgres schema and generates referentially consistent seed data, so dev and CI stop running on stale copies of production.
A lightweight proxy that auto-generates and enforces idempotency keys for outbound API calls, so retries never double-charge or double-ship.
A self-hosted API that renders branded Open Graph preview images from HTML/CSS templates on demand, so static sites get good social cards without per-post design work.
An outbound proxy that tracks rate-limit consumption across every third-party API you call and warns you before a burst of traffic gets throttled in production.
A transparent proxy that sits in front of outbound webhooks and third-party API calls, scrubbing PII before payloads leave the network, for compliance-conscious teams.
A self-hosted proxy that sits in front of your webhook endpoints, logs every payload verbatim, and lets you replay or edit-and-replay failed deliveries on demand.
A single-binary local reverse proxy that enforces configurable rate limits on outbound API requests, preventing 429s from third-party services without changing a line of application code.
A CLI tool that diffs two OpenAPI specs, classifies each change as breaking or safe, and exits non-zero in CI so you catch accidental contract regressions before they ship.
A lightweight API service developers ping from scheduled jobs so that missed or silently-failing crons trigger instant email or Slack alerts.