# Blockscout - Ethereum Classic

Blockscout is a human-friendly blockchain explorer for EVM-compatible networks. It lets users browse blocks, transactions, addresses, tokens (ERC-20/721/1155), logs, contract ABIs, and decoded contract interactions. While the site is primarily designed for people, all rendered information is backed by API endpoints that machines can consume.

All endpoint examples below target the **Blockscout PRO API** at `https://api.blockscout.com` — a single HTTP API spanning 100+ EVM chains. Every request requires the header `Authorization: Bearer {api_key}`; for brevity it is omitted from the individual `curl` examples and must be added by the caller. Generate an API key at the Blockscout developer portal: `https://dev.blockscout.com` (free tier, no credit card required). For the full set of conventions (additional headers, response shape, pagination, plan limits) consult the public `web3-dev` agent skill linked from the "Additional Info" section at the bottom of this document.

Chain name: Ethereum Classic
Chain ID: 61

## General Blockchain Data

### Specific Block Info

```bash
curl --request GET --url 'https://api.blockscout.com/61/api/v2/blocks/{block_hash_or_number}'
```

### Specific Transaction Info

```bash
curl --request GET --url 'https://api.blockscout.com/61/api/v2/transactions/{transaction_hash}'
```

### Get Transaction Logs

```bash
curl --request GET --url 'https://api.blockscout.com/61/api/v2/transactions/{transaction_hash}/logs'
```

### Transaction Summary

```bash
curl --request GET --url 'https://api.blockscout.com/61/api/v2/transactions/{transaction_hash}/summary'
```

### Specific Account Info

```bash
curl --request GET --url 'https://api.blockscout.com/61/api/v2/addresses/{account_address}'
```

### Get Address by ENS Name

Cross-chain ENS resolution is served by the multichain aggregator service; the path intentionally has no `{chain_id}` segment.

```bash
curl --request GET --url 'https://api.blockscout.com/services/multichain/api/v1/search:quick?q={ens_name}'
```

### Get Transactions By Address

Use the `advanced-filters` endpoint with `address_relation=or` to match the address on either side of a transaction.

```bash
curl --request GET --url 'https://api.blockscout.com/61/api/v2/advanced-filters?from_address_hashes_to_include={account_address}&to_address_hashes_to_include={account_address}&address_relation=or&transaction_types=COIN_TRANSFER,CONTRACT_INTERACTION,CONTRACT_CREATION&age_from={YYYY-MM-DDTHH:MM:SSZ}&age_to={YYYY-MM-DDTHH:MM:SSZ}&methods={comma_separated_4byte_selectors_optional}'
```

### Get Token Transfers by Address

Use the `advanced-filters` endpoint with token-flavoured `transaction_types` and `address_relation=or`.

```bash
curl --request GET --url 'https://api.blockscout.com/61/api/v2/advanced-filters?from_address_hashes_to_include={account_address}&to_address_hashes_to_include={account_address}&address_relation=or&transaction_types=ERC-20,ERC-721,ERC-1155&age_from={YYYY-MM-DDTHH:MM:SSZ}&age_to={YYYY-MM-DDTHH:MM:SSZ}&token_contract_address_hashes_to_include={token_contract_address_optional}'
```

### Get ERC20 Tokens By Address

```bash
curl --request GET --url 'https://api.blockscout.com/61/api/v2/addresses/{account_address}/tokens'
```

### Get NFT Tokens By Address

```bash
curl --request GET --url 'https://api.blockscout.com/61/api/v2/addresses/{account_address}/nft'
```

### Lookup Token By Symbol

```bash
curl --request GET --url 'https://api.blockscout.com/61/api/v2/search/quick?q={token_symbol}'
```

### Get Contract ABI

The verified-contract response includes the ABI as a field; no separate ABI-only endpoint is needed.

```bash
curl --request GET --url 'https://api.blockscout.com/61/api/v2/smart-contracts/{contract_address}'
```

### Read Contract Data

Read calls go through the JSON-RPC gateway as `eth_call`. This is the only example in this document that uses `POST`.

```bash
curl --request POST --url 'https://api.blockscout.com/61/json-rpc' --header 'Content-Type: application/json' --data '{"jsonrpc":"2.0","id":1,"method":"eth_call","params":[{"to":"{contract_address}","data":"{encoded_calldata}"},"latest"]}'
```

### Inspect Source Tree of Verified Contract

```bash
curl --request GET --url 'https://api.blockscout.com/61/api/v2/smart-contracts/{contract_address}'
```

## Miscellaneous Blockchain Data


### General Counters

```bash
curl --request GET --url 'https://api.blockscout.com/61/stats-service/api/v1/counters'
```

### Gas Tracker

```bash
curl --request GET --url 'https://api.blockscout.com/61/api/v2/stats'
```

### Coin Balance History by Address

```bash
curl --request GET --url 'https://api.blockscout.com/61/api/v2/addresses/{account_address}/coin-balance-history-by-day'
curl --request GET --url 'https://api.blockscout.com/61/api/v2/addresses/{account_address}/coin-balance-history'
```

### Logs Emitted by Address

```bash
curl --request GET --url 'https://api.blockscout.com/61/api/v2/addresses/{account_address}/logs'
```

### Blocks Validated by Address

```bash
curl --request GET --url 'https://api.blockscout.com/61/api/v2/addresses/{account_address}/blocks-validated'
```
{blank}
### Holders By Token Address

```bash
curl --request GET --url 'https://api.blockscout.com/61/api/v2/tokens/{token_contract_address}/holders'
```

### NFT Inventory By Token Address

```bash
curl --request GET --url 'https://api.blockscout.com/61/api/v2/tokens/{token_contract_address}/instances'
```

### NFT Instance Info

```bash
curl --request GET --url 'https://api.blockscout.com/61/api/v2/tokens/{token_contract_address}/instances/{instance_id}'
curl --request GET --url 'https://api.blockscout.com/61/api/v2/tokens/{token_contract_address}/instances/{instance_id}/transfers'
```
{blank}
## Additional Info

### Blockscout PRO API — deterministic workflow construction

The Blockscout PRO API is the recommended surface for building repeatable services, tools, and automations on top of indexed blockchain data. A single HTTP API spans 100+ EVM chains; one Bearer token authenticates every call.

- Generate an API key at the Blockscout developer portal: https://dev.blockscout.com (free tier, no credit card).
- For AI agents, install the `web3-dev` skill — it encodes the conventions, headers, pagination, and pre-flight checks needed to call the PRO API correctly. Installation instructions: https://raw.githubusercontent.com/blockscout/agent-skills/refs/heads/main/README.md

### Blockscout MCP server — ad-hoc agent interaction

The Blockscout MCP server is for open-ended, exploratory interaction with chains: ask, inspect, follow clues, explain findings. Use it when an agent needs to reason over data on the fly rather than encode a fixed workflow.

- MCP endpoint: https://mcp.blockscout.com/mcp/
- For AI agents, install the `blockscout-analysis` skill — it provides the architectural rules, REST API conventions for scripts, endpoint reference files, and response-transformation guidance the MCP surface assumes. Installation instructions: https://raw.githubusercontent.com/blockscout/agent-skills/refs/heads/main/README.md

### Other Blockscout instances (chain registry)

Look up other Blockscout instances by chain id or name:

```bash
curl --request GET --url 'https://chains.blockscout.com/api/chains'
```