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WSS

Documentation Index

Fetch the complete documentation index at: https://docs.blockdb.io/llms.txt

Use this file to discover all available pages before exploring further.

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Overview

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Subscription Parameters

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chain_id
number
required
Target EVM network. See the Chain enumeration.
​
contract_address
string
Optional filter: one collection contract (20-byte hex, no 0x prefix).

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Message Fields

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contract_id
string
Unique contract incarnation ID (26 bytes hex).
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contract_address
string
Collection contract address (20-byte hex).
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block_number
number
Block where the collection was first recognized.
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block_time
string
Block time (ISO-8601).
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tx_index
number
Transaction index within the block.
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name
string | null
Collection name from name() (ERC721Metadata, optional).
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symbol
string | null
Collection symbol from symbol() (ERC721Metadata, optional).
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token_uri
string | null
Representative sample from the discovery probe.
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supports_metadata
boolean | null
Whether the contract supports the ERC721Metadata extension; null when detection was via fallback.
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supports_enumerable
boolean | null
Whether the contract supports the ERC721Enumerable extension; null when detection was via fallback.
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_tracing_id
string
Lineage id (hex).
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_parent_tracing_ids
string[]
Parent lineage ids (hex).
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_created_at
string
Record creation time (ISO-8601).
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_updated_at
string
Record last update time (ISO-8601).

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Subscription Example

# Use wscat to connect and subscribe
wscat -c wss://api.blockdb.io/v1/evm/ \
  -H "Authorization: Bearer $BLOCKDB_API_KEY" \
  -x '{"action": "subscribe", "dataset_id": "0202", "chain_id": 1, "params": {}}'

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Response Example

{
  "chain_id": 1,
  "dataset_id": "0202",
  "is_reorg": false,
  "data": {
    "contract_id": "0000000000000000000000000000000000000000000000000000",
    "contract_address": "bc4ca0eda7647a8ab7c2061c2e118a18a936f13d",
    "block_number": 12287507,
    "block_time": "2021-04-22T23:43:17Z",
    "tx_index": 114,
    "name": "BoredApeYachtClub",
    "symbol": "BAYC",
    "token_uri": "ipfs://QmeSjSinHpPnmXmspMjwiXyN6zS4E9zccariGR3jxcaWtq/",
    "supports_metadata": true,
    "supports_enumerable": true,
    "_tracing_id": "0202000000000000000000000000000000000001",
    "_parent_tracing_ids": [
      "0103000000000000000000000000000000000001"
    ],
    "_created_at": "2025-11-11T18:42:15.123Z",
    "_updated_at": "2025-11-11T18:42:15.123Z"
  }
}
Messages
subscribe
type:object
unsubscribe
type:object
subscribe_response
type:object
unsubscribe_response
type:object
update
type:object
Last modified on April 6, 2026