Skip to main content
WSS
wss://stream.blockdb.io/v1/evm/
Messages
subscribe
type:object
unsubscribe
type:object
subscribe_response
type:object
unsubscribe_response
type:object
update
type:object

​
Description

The ERC-20 Tokens stream delivers notifications whenever a new ERC-20 token is registered in the BlockDB catalog. Use this stream to discover newly deployed tokens across the canonical chain.

​
Subscription Parameters

​
chain_id
number
required
Target EVM network.
​
address
string
Filter notifications to a specific ERC-20 token address.

​
Message Fields

​
address
string
The Ethereum address of the token.
​
name
string
The name of the token.
​
symbol
string
The symbol of the token.
​
decimals
number
The number of decimals for the token.
​
block_number
number
Block number of the registration event.
​
_tracing_id
string
Row-level lineage hash for correlation.

​
Subscription Example

# Use wscat to connect and subscribe
wscat -c wss://stream.blockdb.io/v1/evm/ \
  -H "Authorization: Bearer $BLOCKDB_API_KEY" \
  -x '{"action": "subscribe", "dataset_id": "0201", "chain_id": 1, "params": {}}'

​
Response Example

{
  "chain_id": 1,
  "dataset_id": "0201",
  "is_reorg": false,
  "data": {
    "address": "0000000000000000000000000000000000000001",
    "name": "Token Name",
    "symbol": "TOKEN",
    "decimals": 18,
    "block_number": 567890,
    "block_time": "2018-07-07T12:34:56Z",
    "tx_index": 4,
    "log_index": 2,
    "_tracing_id": "0201000000000000000000000000000000000001",
    "_created_at": "2025-11-11T18:42:15.123Z"
  }
}