Lookup block
Finds a block by position or time. Specify workchain and shard, then provide either: seqno (exact block number), lt (find block containing this logical time), or unixtime (find block closest to this timestamp). Returns the full block ID including hashes needed for verification.
API key header of the form X-API-Key: <token>, where <token> is the API key. Requests without a key are limited to 1 RPS. Refer to the authentication guide for details.
In: header
Query Parameters
The workchain to query. Use -1 for masterchain (validators, system contracts, config) or 0 for basechain (regular accounts and contracts). Most user transactions happen on workchain 0.
int32The shard identifier. Masterchain always uses -9223372036854775808. For basechain, shards split and merge dynamically. Use the shards endpoint to discover current shard configuration.
Query state at a specific block height. If omitted, returns the current state. Use this to look up historical data at a specific point in time.
int32Logical time of a block
UNIX timestamp of a block
int32Response Body
application/json
application/json
application/json
application/json
application/json
application/json
curl -X GET "https://example.com/api/v2/lookupBlock?workchain=0&shard=string"{ "ok": true, "result": { "@type": "ton.blockIdExt", "workchain": 0, "shard": "string", "seqno": 0, "root_hash": "string", "file_hash": "string" }, "@extra": "string"}