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, weights and live float
`GET /api/vaults/:symbol`	one vault by symbol, e.g. `ARC10`
`GET /api/stats`	protocol-level stats, current epoch, float per constituent
`GET /api/chain`	live block number and gas price from the Arc RPC
`GET /api/contracts`	deployed addresses on the active network

Example

$ curl https://arcyield.dev/api/vaults/ARC10

{
  "symbol": "ARC10",
  "name": "Arc Ten",
  "epoch": 0,
  "navPerShare": 1.0,
  "holdings": [
    { "ticker": "USYC", "weightBps": 1500, "assetClass": "treasury", "floatOnArc": ... }
  ]
}

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, and so does the float read. /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.