# Autopilot Fact Sheets API

> Read-only HTTP surface for official live-composite records. Research purposes only.

## Endpoints

- [OpenAPI 3.1](https://autopilotfactsheets.com/openapi.json): Typed operations, parameters, responses, and opaque error schema.
- [Meta](https://autopilotfactsheets.com/api/meta): Release id, as-of range, discovery URLs, and record path templates.
- [List](https://autopilotfactsheets.com/api/portfolios): Same filters as /portfolios: q, category, risk, maturity, sort, order.
- [Compare](https://autopilotfactsheets.com/api/portfolios/compare?ids=congress-buys,pelosi-tracker): GET ?ids=slug-a,slug-b (max 4). All-or-nothing. Not a ranking.
- [Search](https://autopilotfactsheets.com/api/search): Find a published record by name, slug, or portfolioKey.
- [Fetch](https://autopilotfactsheets.com/api/fetch?slug=congress-buys): Approved citation Markdown plus canonical and alternate URLs by id, slug, or portfolioKey.
- [Atom feed](https://autopilotfactsheets.com/feed.xml): Released records with HTML, Markdown, and JSON alternates.

## Cite surfaces

- HTML: /portfolios/{slug}
- Markdown: /portfolios/{slug}.md
- JSON: /portfolios/{slug}.json
- Retired slugs stay HTTP 200 with status=retired, data_current=false, and noindex.

## Units and envelopes

- Return fields are decimal fractions: 0.1908 equals 19.08%.
- Currency is USD. Sharpe and Sortino are ratios.
- Successful cite responses include RFC 8288 Link headers for alternates.
- Unknown identifiers: {"error":"not_found"}

## Root briefing

- [Site llms.txt](https://autopilotfactsheets.com/llms.txt): Entity, destinations, measurement rules, and disclosures.