API

Four public endpoints, no keys, no rate cards. The same data the site renders.

Endpoints

Route	Returns
`GET /api/vaults`	all vaults with constituents and weights
`GET /api/vaults/:symbol`	one vault by symbol, e.g. `GRAD10`
`GET /api/stats`	protocol-level stats and current epoch
`GET /api/chain`	live block number and gas price from Robinhood Chain RPC

Example

$ curl https://yieldetf.me/api/vaults/GRAD10

{
  "symbol": "GRAD10",
  "name": "Graduate Ten",
  "epoch": 6,
  "navPerShareEth": 1.0231,
  "holdings": [
    { "ticker": "PONS", "weightBps": 1500, "pairedWith": "ETH", ... }
  ]
}

A 404 on /api/vaults/:symbol returns a JSON error naming the valid listing route. Symbols are case-insensitive.

Caching

Registry-backed routes revalidate every 60 seconds. /api/chain revalidates every 12 seconds and degrades gracefully: if the RPC times out, ok is false and the block fields are null rather than stale.