A web app that exposes a public REST API for Jira Cloud agile metrics (velocity, burndown, sprint scope) so third-party tools and internal dashboards can consume them without scraping

Jira's agile reports (velocity chart, burndown chart, sprint report) are locked inside the UI. The underlying REST API has no stable public endpoints for this data: the only available hooks are undocumented Greenhopper legacy routes that are capped at 12 sprints, subject to removal, and return raw event streams that teams must manually parse and compute into actual metrics. Third-party reporting tools like eazyBI, Custom Charts, and Great Gadgets are dashboard products, not API services; they output PDFs and PNGs, not JSON. There is no hosted service a developer can point at and get back structured velocity numbers, burndown series, or sprint completion rates for use in a CI/CD gate, a BI tool, a Slack bot, or an executive dashboard. This product sits between Jira and the rest of the toolchain: it authenticates to a team's Jira workspace via OAuth, continuously syncs issue-level data using the fully supported issue search and sprint APIs, computes the agile metrics that Atlassian only shows in the UI, and re-exposes them through a clean versioned REST API. Teams get stable, queryable endpoints for velocity per sprint, planned vs completed story points, burndown series, cycle time distributions, and scope change deltas, all without touching an undocumented endpoint or writing a custom ETL job. The business model is API seat licensing: a free tier for small teams (1 board, 6-month history) and paid tiers per board or per seat for data retention, webhook delivery, and higher refresh rates.