DAY
DAY routes capital across yield venues without taking custody.
Site: dayprotocol.com
API: https://dayprotocol.com/api/v1 · OpenAPI
Auth: X-API-Key
Start here: HTTP API · API reference · Fees · Architecture
What DAY does
Section titled “What DAY does”- Discover venues and markets
- Route capital into a strategy (owner signs)
- Harvest realized yield and compound it back into the owner’s vault
| Feature | Default |
|---|---|
| Auto Yield (stake / harvest / compound) | Off until the owner enables it |
| Deposit / withdraw principal | 0 protocol fee |
| Fees | DAY charges only for swaps and bridges — see Fees |
Phase 1
Section titled “Phase 1”| Chain | Role |
|---|---|
| Sui · Solana | Execution homes |
| Base · Arbitrum | Map / discovery until write is live |
Non-negotiables
Section titled “Non-negotiables”- No team custody of principal
- Owner can always withdraw
- Stake off by default
- Fee on yield only (never invent APY)
- Adapters own execution truth; market maps are discovery only
Full rules: Product constitution
| Page | For |
|---|---|
| HTTP API | Integrate over HTTP / SDK |
| API reference | Endpoint detail |
| Integration contract | Status codes, errors, webhooks |
| Route catalog | Full route table |
| Fees | Fee schedule |
| Architecture | How the router is built |
| Package IDs | Live on-chain ids |
| Versioning | API / package versions |
| Copyright | License & brand |