# Fuse Chain API
> Live on-chain data for Fuse Network — an EVM Layer 1 for payments and stablecoins — via its public Blockscout explorer (no wallet, no key). The stats endpoint returns chain-wide totals (blocks, transactions, addresses, average block time, gas used); gas gives the current gas-price oracle (slow/average/fast). Blocks lists the latest blocks, and a single block resolves by height or by hash with its transaction count, gas, validator and timestamp. The address endpoint returns any account's FUSE balance, nonce, contract flag and token holdings; transaction resolves a tx by hash with its from/to, value in FUSE, fee, status and block. The token endpoint returns an ERC-20 token's metadata (name, symbol, decimals, total supply, holders) by contract address, and search runs a universal lookup across addresses, tokens, blocks and transactions. Gas, balances, values and fees are denominated in FUSE, the native coin. Real on-chain data straight from the explorer, refreshed every call — no key. 9 endpoints. For multi-chain coverage combine with the other oanor chain APIs (Ethereum, Base, Arbitrum and more).

## Authentication
All requests require your oanor API key in the `x-oanor-key` header. Get one at https://www.oanor.com/developer/keys.

```bash
curl -H "x-oanor-key: oanor_live_…" "https://api.oanor.com/fuse-api/..."
```

## Pricing
- **Free** (Free) — 3,600 calls/Mo, 2 req/s
- **Basic** ($24/Mo) — 116,000 calls/Mo, 8 req/s
- **Pro** ($73/Mo) — 710,000 calls/Mo, 20 req/s
- **Mega** ($245/Mo) — 3,950,000 calls/Mo, 50 req/s

## Endpoints

### Chain

#### `GET /v1/gas` — Gas-price oracle

**Example:**
```bash
curl -H "x-oanor-key: $KEY" \
  "https://api.oanor.com/fuse-api/v1/gas"
```

**Response:**
```json
{
    "data": {
        "fast": 15.13,
        "slow": 13.09,
        "unit": "gwei",
        "average": 14.92,
        "gas_used_today": "3694485126"
    },
    "meta": {
        "timestamp": "2026-06-08T09:49:28.258Z",
        "request_id": "c137d5c2-d88c-4dc3-a50a-a06f06b15360"
    },
    "status": "ok",
    "message": "Gas retrieved successfully",
    "success": true
}
```

#### `GET /v1/stats` — Chain stats

**Example:**
```bash
curl -H "x-oanor-key: $KEY" \
  "https://api.oanor.com/fuse-api/v1/stats"
```

**Response:**
```json
{
    "data": {
        "tvl_usd": null,
        "gas_prices": {
            "fast": 15.13,
            "slow": 13.09,
            "average": 14.92
        },
        "total_blocks": 42383501,
        "coin_price_usd": 0.00307027,
        "gas_used_today": "3694485126",
        "market_cap_usd": 966531.0526111419,
        "total_addresses": "7913672",
        "total_transactions": "200747562",
        "transactions_today": "23365",
        "network_utilization_percent": 0.4778285
    },
    "meta": {
        "timestamp": "2026-06-08T09:49:28.434Z",
        "request_id": "1fe466c9-f6c9-4ea1-a672-edd2c1a3455f"
    },
    "status": "ok",
    "message": "Stats retrieved successfully",
    "success": true
}
```

### Blocks

#### `GET /v1/block` — A block by height or hash

**Parameters:**
- `height` (query, optional, string) — Block height Example: `42381076`
- `hash` (query, optional, string) — Block hash (alternative to height)

**Example:**
```bash
curl -H "x-oanor-key: $KEY" \
  "https://api.oanor.com/fuse-api/v1/block?height=42381076"
```

**Response:**
```json
{
    "data": {
        "block": {
            "hash": "0xa7c17967c812931ee4ad0c4a1b616ccc24c0d5b770e1a24eafe1935e82a3f5a8",
            "size": 1731,
            "miner": "0xa7Ca8178558945BeC5C40E6666C7aC493C9E13cC",
            "height": 42381076,
            "reward": "5264762445900",
            "gas_used": 411014,
            "tx_count": 3,
            "gas_limit": 20000000,
            "timestamp": "2026-06-08T05:56:55.000000Z",
            "burnt_fees": "4110140000000000",
            "difficulty": "340282366920938463463374607431768211454",
            "base_fee_per_gas": "10000000000"
        }
    },
    "meta": {
        "timestamp": "2026-06-08T09:49:28.589Z",
        "request_id": "4d05f087-c97b-48e5-b9d7-303fea931dfe"
    },
    "status": "ok",
    "message": "Block retrieved successfully",
    "success": true
}
```

#### `GET /v1/blocks` — Latest blocks

**Example:**
```bash
curl -H "x-oanor-key: $KEY" \
  "https://api.oanor.com/fuse-api/v1/blocks"
```

**Response:**
```json
{
    "data": {
        "count": 50,
        "blocks": [
            {
                "hash": "0xe456a03cc44c1381e73817605d89dab6b7ece50eb92ba34d498eed46f4b7791c",
                "size": 961,
                "miner": "0x9B956e3d318625Be2686Ae7268d81777c462d41f",
                "height": 42383866,
                "reward": "104118140879211",
                "gas_used": 78699,
                "tx_count": 1,
                "gas_limit": 20000000,
                "timestamp": "2026-06-08T09:49:25.000000Z",
                "burnt_fees": "786990000000000",
                "difficulty": "340282366920938463463374607431768211454",
                "base_fee_per_gas": "10000000000"
            },
            {
                "hash": "0xce27f34d6add7a1c72251a4326757dee2dfc25c2aceda53ba7f3f426c37a6ede",
                "size": 1072,
                "miner": "0x0aD074d37B057cB99A58FB0F33aE6a8ce7124C64",
                "height": 42383865,
                "reward": "1316187960471921",
                "gas_used": 260784,
                "tx_count": 2,
                "gas_limit": 20000000,
                "timestamp": "2026-06-08T09:49:20.000000Z",
                "burnt_fees": "2607840000000000",
                "difficulty": "340282366920938463463374607431768211454",
                "base_fee_per_gas": "10000000000"
            },
            {
                "hash": "0xb1e9061e34cbe35dd799aa079b5dc1aea7c0e8c974d27739f4bbccb4a262e85e",
                "size": 575,
                "min
…(truncated, see openapi.json for full schema)
```

### Accounts

#### `GET /v1/address` — Account balance & holdings

**Parameters:**
- `address` (query, required, string) — Account address (0x + 40 hex) Example: `0xA7fac65aF373771894B8f22d75dadd150da756B8`

**Example:**
```bash
curl -H "x-oanor-key: $KEY" \
  "https://api.oanor.com/fuse-api/v1/address?address=0xA7fac65aF373771894B8f22d75dadd150da756B8"
```

**Response:**
```json
{
    "data": {
        "address": {
            "ens": null,
            "hash": "0xA7fac65aF373771894B8f22d75dadd150da756B8",
            "name": null,
            "token": null,
            "creator": null,
            "balance_wei": "1822807032929018972188",
            "is_contract": false,
            "is_verified": false,
            "balance_fuse": 1822.807032929019
        }
    },
    "meta": {
        "timestamp": "2026-06-08T09:49:29.177Z",
        "request_id": "afb492ff-5369-4aab-b61b-6d07ca5e37f1"
    },
    "status": "ok",
    "message": "Address retrieved successfully",
    "success": true
}
```

### Transactions

#### `GET /v1/transaction` — A transaction by hash

**Parameters:**
- `hash` (query, required, string) — Transaction hash (0x + 64 hex) Example: `0x98bcfe6d7385574070ba52ae5f387122ebfc4c9bbba87b9618eef3c8eb58020a`

**Example:**
```bash
curl -H "x-oanor-key: $KEY" \
  "https://api.oanor.com/fuse-api/v1/transaction?hash=0x98bcfe6d7385574070ba52ae5f387122ebfc4c9bbba87b9618eef3c8eb58020a"
```

**Response:**
```json
{
    "data": {
        "transaction": {
            "to": "0x6E055FfA786Dfe9DBB214b649a9b2A169e6B820b",
            "from": "0xA7fac65aF373771894B8f22d75dadd150da756B8",
            "hash": "0x98bcfe6d7385574070ba52ae5f387122ebfc4c9bbba87b9618eef3c8eb58020a",
            "type": 2,
            "block": 42381076,
            "nonce": 442076,
            "method": "exactInputSingle",
            "status": "ok",
            "fee_wei": "3120820000000000",
            "fee_fuse": 0.00312082,
            "gas_used": 156041,
            "gas_price": "20000000000",
            "timestamp": "2026-06-08T05:56:55.000000Z",
            "value_wei": "0",
            "value_fuse": 0,
            "confirmations": 2791
        }
    },
    "meta": {
        "timestamp": "2026-06-08T09:49:29.481Z",
        "request_id": "34f4f0e9-5b43-4411-8175-a20ce9d89849"
    },
    "status": "ok",
    "message": "Transaction retrieved successfully",
    "success": true
}
```

### Tokens

#### `GET /v1/token` — ERC-20 token metadata

**Parameters:**
- `address` (query, required, string) — Token contract address Example: `0xc6Bc407706B7140EE8Eef2f86F9504651b63e7f9`

**Example:**
```bash
curl -H "x-oanor-key: $KEY" \
  "https://api.oanor.com/fuse-api/v1/token?address=0xc6Bc407706B7140EE8Eef2f86F9504651b63e7f9"
```

**Response:**
```json
{
    "data": {
        "token": {
            "icon": "https://assets.coingecko.com/coins/images/69316/small/usdc.jpg?1758186473",
            "name": "Stargate Bridged USDC",
            "type": "ERC-20",
            "symbol": "USDC.E",
            "holders": null,
            "decimals": 6,
            "total_supply": "52883023035",
            "exchange_rate_usd": 0.999626,
            "circulating_market_cap": "37116523.52246963"
        }
    },
    "meta": {
        "timestamp": "2026-06-08T09:49:29.643Z",
        "request_id": "c7bdb3f2-3e83-47af-9b5b-c7e8c3f22688"
    },
    "status": "ok",
    "message": "Token retrieved successfully",
    "success": true
}
```

### Search

#### `GET /v1/search` — Universal search

**Parameters:**
- `q` (query, required, string) — Address, token, block or tx Example: `USDC.E`

**Example:**
```bash
curl -H "x-oanor-key: $KEY" \
  "https://api.oanor.com/fuse-api/v1/search?q=USDC.E"
```

**Response:**
```json
{
    "data": {
        "count": 1,
        "query": "USDC.E",
        "results": [
            {
                "name": null,
                "type": "metadata_tag",
                "address": "0x408A625596f47314e1FD4a6cBCE84C4A8695bA3f"
            }
        ]
    },
    "meta": {
        "timestamp": "2026-06-08T09:49:30.509Z",
        "request_id": "5773d726-4ad0-484f-9102-627948e59b92"
    },
    "status": "ok",
    "message": "Search results retrieved successfully",
    "success": true
}
```

### Meta

#### `GET /v1/meta` — Spec

**Example:**
```bash
curl -H "x-oanor-key: $KEY" \
  "https://api.oanor.com/fuse-api/v1/meta"
```

**Response:**
```json
{
    "data": {
        "service": "fuse-api",
        "endpoints": {
            "GET /v1/gas": "Gas oracle (slow/average/fast in gwei).",
            "GET /v1/meta": "This document.",
            "GET /v1/block": "Block detail by height= or hash=.",
            "GET /v1/stats": "Network stats (blocks, txns, coin price, market cap, gas).",
            "GET /v1/token": "ERC-20 token detail by contract (address=).",
            "GET /v1/blocks": "The most recent blocks.",
            "GET /v1/search": "Search addresses, tokens, blocks & txns (q=).",
            "GET /v1/address": "Address balance, ENS & contract info (address=).",
            "GET /v1/transaction": "Transaction detail (hash=)."
        },
        "description": "Live Fuse Network on-chain data via Blockscout: network stats, a gas oracle (gwei), recent blocks and block detail, address balances with ENS, transaction detail, ERC-20 token detail and a universal search across addresses, tokens, blocks and transactions. Fuse is an EVM Layer 1 for payments and stablecoins; gas, balances and fees are in FUSE. Real on-chain data, no key."
    },
    "meta": {
        "timestamp": "2026-06-08T09:49:30.619Z",
        "request_id": "b3f90d9c-40a3-4384-8684-f8aa45e03492"
    },
    "status": "ok",
    "message": "Meta",
    "success": true
}
```


---
Marketplace page: https://www.oanor.com/api/fuse-api
OpenAPI spec: https://www.oanor.com/api/fuse-api/openapi.json