# @1390/woofi Swap

> Swap any token at the best price — single-chain or cross-chain — with one API call. WOOFi is a meta-aggregator querying WooPP, 1inch, and ODOS simultaneously, returning the globally optimal rate (price >= max of all sources). Cross-chain swaps via Stargate bridge. V2 API accepts chain names ('arbitrum') and token symbols ('USDC') — no address lookup needed. Supports all ERC-20 tokens and native gas tokens on 14 EVM chains.

- Skill: `starchild-ai-agent/1390-woofi-swap` (Agent Skill, multi-file: 3 files)
- Install (CLI): `npx skillmds@latest add starchild-ai-agent/1390-woofi-swap`
- Raw SKILL.md: https://api.skillmd.com/api/skills/starchild-ai-agent/1390-woofi-swap/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Integrations & APIs
- Author: starchild-ai-agent (https://skillmd.com/u/starchild-ai-agent)
- Updated: 2026-09-17
- Page: https://skillmd.com/skills/starchild-ai-agent/1390-woofi-swap

---


# WOOFi Swap — Best-Price Meta-Aggregator (V2)

Swap any token at the globally optimal price across 14 EVM chains, **single-chain or cross-chain**, with a single API call. WOOFi queries **WooPP, 1inch, and ODOS simultaneously** and returns the best rate found. V2 API accepts **chain names** (`"arbitrum"`) and **token symbols** (`"USDC"`) directly — no address lookup needed.

## Why Use WOOFi

- **Best price guaranteed by design**: Compares WooPP, 1inch, and ODOS in real time. Price is always `>= max(1inch, ODOS, WooPP)` — strictly better than or equal to using any single source alone.
- **Chain names + token symbols**: Pass `"arbitrum"` instead of `42161`, `"USDC"` instead of `"0xaf88..."`. Case-insensitive, no manual address resolution needed.
- **Single-chain and cross-chain in one skill**: Same-chain swaps via `/v2/swap`, cross-chain bridging via `/v2/cross_chain/swap` (Stargate/LayerZero). Both return ready-to-sign `tx_steps`.
- **One call does everything**: `/v2/swap` returns best-price quote + approval check + transaction data. No separate calls needed — just iterate `tx_steps` and sign.
- **All tokens, 14 chains**: Any ERC-20 and native gas token (ETH, BNB, AVAX, POL, etc.) on all supported chains. No whitelist limitation.

## When to Use This Skill

Use WOOFi Swap when the user wants to:

- **Swap, trade, exchange, or convert** any token on any EVM chain
- **Get a price quote** or exchange rate between two tokens
- **Find the best available price** across DEX aggregators
- **Bridge tokens across chains** — cross-chain swap via Stargate
- **Buy or sell** a specific cryptocurrency
- **Build a swap transaction** for wallet signing and on-chain execution

---

## API Endpoints

**Base URL**: `https://sapi.woofi.com` | **Auth**: None | **Rate Limit**: 5 req/s | **Format**: JSON

### Flexible Input (all V2 endpoints)

- **Chain**: chain ID (`42161`) or name (`"arbitrum"`) — case-insensitive, strips spaces/dashes
- **Token**: address (`"0xaf88..."`) or symbol (`"USDC"`) — resolved via local index, static manifests, alias table, and external API fallback

---

### 1. Get Quote — `POST /v2/quote`

Returns the best available price. Read-only — no transaction generated.

| Parameter | Type | Required | Default | Description |
|-----------|------|----------|---------|-------------|
| `chain` | int \| str | Yes | — | Chain ID or name |
| `sell_token` | str | Yes | — | Token address or symbol |
| `buy_token` | str | Yes | — | Token address or symbol |
| `sell_amount` | str | Yes | — | Human-readable amount (e.g., `"1000"`) |
| `slippage_pct` | float | No | `0.5` | Max slippage % |

**Response**: `chain`, `sell_token`, `buy_token`, `sell_amount`, `buy_amount`, `price`, `guaranteed_price`

```bash
curl -X POST "https://sapi.woofi.com/v2/quote" \
  -H "Content-Type: application/json" \
  -d '{"chain": "arbitrum", "sell_token": "USDC", "buy_token": "WETH", "sell_amount": "1000"}'
```

---

### 2. Execute Swap — `POST /v2/swap`

**Single-call swap**: quote + approval check + transaction building in one response. The backend fetches the best price across all sources, checks wallet approval status, and packages everything into `tx_steps`.

| Parameter | Type | Required | Default | Description |
|-----------|------|----------|---------|-------------|
| `chain` | int \| str | Yes | — | Chain ID or name |
| `sell_token` | str | Yes | — | Token address or symbol |
| `buy_token` | str | Yes | — | Token address or symbol |
| `sell_amount` | str | Yes | — | Human-readable amount |
| `to` | str | Yes | — | Recipient wallet address |
| `rebate_to` | str | Yes | — | Rebate address (typically same as `to`) |
| `slippage_pct` | float | No | `0.5` | Max slippage % |
| `signer_address` | str | No | `null` | Wallet address (for approval check) |

**Response** (extends quote): `needs_approve`, `tx_steps` — iterate and sign each tx in order.

```bash
curl -X POST "https://sapi.woofi.com/v2/swap" \
  -H "Content-Type: application/json" \
  -d '{"chain": "arbitrum", "sell_token": "USDC", "buy_token": "WETH", "sell_amount": "1000", "to": "0xYourWallet", "rebate_to": "0xYourWallet", "signer_address": "0xYourWallet"}'
```

---

### 3. Cross-Chain Quote — `POST /v2/cross_chain/quote`

Price quote for cross-chain swap via Stargate bridge. Read-only.

| Parameter | Type | Required | Default | Description |
|-----------|------|----------|---------|-------------|
| `src_chain` | int \| str | Yes | — | Source chain ID or name |
| `dst_chain` | int \| str | Yes | — | Destination chain ID or name |
| `src_token` | str | Yes | — | Source token (resolved against `src_chain`) |
| `dst_token` | str | Yes | — | Destination token (resolved against `dst_chain`) |
| `src_amount` | str | Yes | — | Human-readable amount |
| `slippage_pct` | float | No | `1.0` | Slippage tolerance % |

**Response**: `src_chain`, `dst_chain`, `src_amount`, `dst_amount`, `bridge_amount_in`, `bridge_amount_out`, `price_f`

```bash
curl -X POST "https://sapi.woofi.com/v2/cross_chain/quote" \
  -H "Content-Type: application/json" \
  -d '{"src_chain": "arbitrum", "dst_chain": "base", "src_token": "USDC", "dst_token": "USDC", "src_amount": "100"}'
```

---

### 4. Cross-Chain Swap — `POST /v2/cross_chain/swap`

Build transaction(s) for cross-chain swap via Stargate bridge.

| Parameter | Type | Required | Default | Description |
|-----------|------|----------|---------|-------------|
| `src_chain` | int \| str | Yes | — | Source chain ID or name |
| `dst_chain` | int \| str | Yes | — | Destination chain ID or name |
| `src_token` | str | Yes | — | Source token (resolved against `src_chain`) |
| `dst_token` | str | Yes | — | Destination token (resolved against `dst_chain`) |
| `src_amount` | str | Yes | — | Human-readable amount |
| `to` | str | Yes | — | Recipient on destination chain |
| `slippage_pct` | float | No | `1.0` | Slippage tolerance % |
| `signer_address` | str | No | `null` | Signer address (for approval check) |

**Response** (extends cross-chain quote): `native_fee`, `needs_approve`, `tx_steps`

```bash
curl -X POST "https://sapi.woofi.com/v2/cross_chain/swap" \
  -H "Content-Type: application/json" \
  -d '{"src_chain": "arbitrum", "dst_chain": "base", "src_token": "USDC", "dst_token": "USDC", "src_amount": "100", "to": "0xYourWallet", "signer_address": "0xYourWallet"}'
```

---

## Supported Chains

| Chain | ID | Native Token | Accepted Names |
|-------|-----|-------------|----------------|
| Arbitrum | `42161` | ETH | arbitrum, arb, arbitrumone |
| Base | `8453` | ETH | base |
| BSC | `56` | BNB | bsc, bnb, binance, bnbchain |
| Polygon | `137` | POL | polygon, matic, pol |
| Optimism | `10` | ETH | optimism, op |
| Avalanche | `43114` | AVAX | avalanche, avax |
| Ethereum | `1` | ETH | ethereum, eth, mainnet |
| Linea | `59144` | ETH | linea |
| Mantle | `5000` | MNT | mantle |
| Sonic | `146` | S | sonic |
| Berachain | `80094` | BERA | berachain, bera |
| HyperEVM | `999` | HYPE | hyperevm, hyper |
| Monad | `143` | MON | monad |
| zkSync | `324` | ETH | zksync, zksyncera |

**Native token**: Use symbol (`"ETH"`, `"BNB"`, `"AVAX"`, `"POL"`, `"MNT"`, `"S"`, `"BERA"`, `"MON"`) or `0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE`.

---

## Important Notes

1. **Best price by design** — WOOFi queries WooPP + 1inch + ODOS simultaneously. Price >= max(all sources).
2. **Flexible input** — Chain names (`"arbitrum"`) and token symbols (`"USDC"`) accepted everywhere. No address lookup needed.
3. **One call, full swap** — `/v2/swap` returns quote + approval check + tx data. Just iterate `tx_steps` and sign.
4. **Cross-chain via Stargate** — `/v2/cross_chain/swap` bridges tokens between chains. `tx_steps` include LayerZero fee in `value` field.
5. **Human-readable amounts** — Pass `"1.5"` not wei. No unit conversion needed for input.
6. **All tokens supported** — Any ERC-20 or native gas token on any supported chain. No whitelist.
7. **Cross-chain token resolution** — `src_token` resolves against `src_chain`, `dst_token` against `dst_chain`. Same symbol maps to correct addresses on each chain.
8. **Wallet signing required** — API returns unsigned tx data. The user's wallet must sign and broadcast.