Address balance
POST /x402/btc/address · $0.005 per request
Body fields: address (string, required)
Example body: {"address":"1A1zP1eP5QGefi2DMPTfTL5SLmv7DivfNa"}
Explorer API · Pay per request (x402)
Pay for each request with USDC over the x402 protocol (https://www.x402.org) — no account or API key needed.
1. Send the POST request with its JSON body.
2. The API answers 402 Payment Required with the payment requirements for that endpoint.
3. Pay with an x402-compatible client and retry the same request with the payment attached.
4. The API returns 200 with the data.
Each endpoint lists its price per request.
Payment required. Read the payment requirements from the PAYMENT-REQUIRED header, then retry the request with a signed payment in the PAYMENT-SIGNATURE header.
Base URL: https://api.blockchain.info/explorer-gateway-kt
Full OpenAPI spec with response schemas: /explorer/docs/explorer-gateway-x402.json
Bitcoin
Address transactions
POST /x402/btc/address/transactions · $0.005 per request
Body fields: address (string, required); limit (integer, default 20, max 50); offset (integer, default 0)
Example body: {"address":"1A1zP1eP5QGefi2DMPTfTL5SLmv7DivfNa","limit":20,"offset":0}
Transaction
POST /x402/btc/transaction · $0.005 per request
Body fields: txId (string, required)
Example body: {"txId":"4a5e1e4baab89f3a32518a88c31bc87f618f76673e2cc77ab2127b7afdeda33b"}
Transactions (batch)
POST /x402/btc/transactions · $0.005 per request
Body fields: txIds (array of string, required, max 50 items)
Example body: {"txIds":["4a5e1e4baab89f3a32518a88c31bc87f618f76673e2cc77ab2127b7afdeda33b"]}
Block
POST /x402/btc/block · $0.005 per request
Body fields: hash (string); height (integer); includeTransactions (boolean, default true)
Example body: {"hash":"000000000019d6689c085ae165831e934ff763ae46a2a6c172b3f1b60a8ce26f"}
Block transactions
POST /x402/btc/block/transactions · $0.005 per request
Body fields: hash (string); height (integer); limit (integer, default 15, max 50); offset (integer, default 0); sort (one of index | value | fees, default index); order (one of asc | desc, default asc)
Example body: {"height":850000}
Latest blocks
POST /x402/btc/blocks · $0.005 per request
Body fields: limit (integer, default 10, max 50); after (integer)
Example body: {"limit":10}
Broadcast transaction
POST /x402/btc/broadcast · $0.005 per request
Body fields: tx (string, required)
Example body: {"tx":"0200000001…"}
Bitcoin Cash
Address balance
POST /x402/bch/address · $0.005 per request
Body fields: address (string, required)
Example body: {"address":"bitcoincash:qp3wjpa3tjlj042z2wv7hahsldgwhwy0rq9sywjpyy"}
Address transactions
POST /x402/bch/address/transactions · $0.005 per request
Body fields: address (string, required); limit (integer, default 20, max 50); offset (integer, default 0)
Example body: {"address":"bitcoincash:qp3wjpa3tjlj042z2wv7hahsldgwhwy0rq9sywjpyy","limit":20,"offset":0}
Transaction
POST /x402/bch/transaction · $0.005 per request
Body fields: txId (string, required)
Example body: {"txId":"4a5e1e4baab89f3a32518a88c31bc87f618f76673e2cc77ab2127b7afdeda33b"}
Transactions (batch)
POST /x402/bch/transactions · $0.005 per request
Body fields: txIds (array of string, required, max 50 items)
Example body: {"txIds":["4a5e1e4baab89f3a32518a88c31bc87f618f76673e2cc77ab2127b7afdeda33b"]}
Block
POST /x402/bch/block · $0.005 per request
Body fields: hash (string); height (integer); includeTransactions (boolean, default true)
Example body: {"hash":"000000000000000000651ef99cb9fcbe0dadde1d424bd9f15ff20136191a5eec"}
Block transactions
POST /x402/bch/block/transactions · $0.005 per request
Body fields: hash (string); height (integer); limit (integer, default 15, max 50); offset (integer, default 0); sort (one of index | value | fees, default index); order (one of asc | desc, default asc)
Example body: {"height":850000}
Latest blocks
POST /x402/bch/blocks · $0.005 per request
Body fields: limit (integer, default 10, max 50); after (integer)
Example body: {"limit":10}
Broadcast transaction
POST /x402/bch/broadcast · $0.005 per request
Body fields: tx (string, required)
Example body: {"tx":"0200000001…"}
Ethereum
Address
POST /x402/eth/address · $0.005 per request
Body fields: network (string, required); address (string, required); page (integer, default 1); size (integer, default 20, max 50)
Example body: {"network":"ETH","address":"0xde0B295669a9FD93d5F28D9Ec85E40f4cb697BAe","page":0,"size":20}
Token holdings
POST /x402/eth/address/tokens · $0.005 per request
Body fields: network (string, required); address (string, required)
Example body: {"network":"ETH","address":"0xde0B295669a9FD93d5F28D9Ec85E40f4cb697BAe"}
Internal transactions
POST /x402/eth/address/internal-transactions · $0.005 per request
Body fields: network (string, required); address (string, required); page (integer, default 0); size (integer, default 20, max 50)
Example body: {"network":"ETH","address":"0xde0B295669a9FD93d5F28D9Ec85E40f4cb697BAe","page":0,"size":20}
Transaction
POST /x402/eth/transaction · $0.005 per request
Body fields: network (string, required); txId (string, required); transfers (boolean, default false)
Example body: {"network":"ETH","txId":"0x5c504ed432cb51138bcf09aa5e8a410dd4a1e204ef84bfed1be16dfba1b22060"}
Latest blocks
POST /x402/eth/blocks · $0.005 per request
Body fields: network (string, required); limit (integer, default 10, max 20)
Example body: {"network":"ETH","limit":10}
Block
POST /x402/eth/block · $0.005 per request
Body fields: network (string, required); blockId (integer); hash (string); includeTransactions (boolean, default true)
Example body: {"network":"ETH","blockId":21000000}
Block transactions
POST /x402/eth/block/transactions · $0.005 per request
Body fields: network (string, required); blockId (integer); hash (string); limit (integer, default 15, max 50); offset (integer, default 0); sort (one of index | value | fees, default index); order (one of asc | desc, default asc)
Example body: {"network":"ETH","blockId":21000000}
Broadcast transaction
POST /x402/eth/broadcast · $0.005 per request
Body fields: tx (string, required)
Example body: {"tx":"0x02f8…"}
Solana
Latest blocks
POST /x402/sol/blocks · $0.005 per request
Body fields: network (string, required); limit (integer, default 10, max 20)
Example body: {"network":"SOL","limit":10}
Block
POST /x402/sol/block · $0.005 per request
Body fields: network (string, required); blockId (integer, required); includeTransactions (boolean, default true)
Example body: {"network":"SOL","blockId":280000000}
Block transactions
POST /x402/sol/block/transactions · $0.005 per request
Body fields: network (string, required); blockId (integer, required); limit (integer, default 15, max 50); offset (integer, default 0); sort (one of index | fees, default index); order (one of asc | desc, default asc)
Example body: {"network":"SOL","blockId":280000000}
Transaction
POST /x402/sol/transaction · $0.005 per request
Body fields: network (string, required); txId (string, required)
Example body: {"network":"SOL","txId":"4SMDZ7oiVvTyae1FrH2a4Li3hNNigZzc4s7QPiiGHk9xDsoSTPFbUSrV5KcRSDesj2BE11gvq8ua4DL3f5HFKxaW"}
Transaction instructions
POST /x402/sol/transaction/instructions · $0.005 per request
Body fields: network (string, required); txId (string, required)
Example body: {"network":"SOL","txId":"4SMDZ7oiVvTyae1FrH2a4Li3hNNigZzc4s7QPiiGHk9xDsoSTPFbUSrV5KcRSDesj2BE11gvq8ua4DL3f5HFKxaW"}
Raw transaction
POST /x402/sol/transaction/raw · $0.005 per request
Body fields: network (string, required); txId (string, required)
Example body: {"network":"SOL","txId":"4SMDZ7oiVvTyae1FrH2a4Li3hNNigZzc4s7QPiiGHk9xDsoSTPFbUSrV5KcRSDesj2BE11gvq8ua4DL3f5HFKxaW"}
Address
POST /x402/sol/address · $0.005 per request
Body fields: network (string, required); address (string, required); limit (integer, default 10, max 50); before (string)
Example body: {"network":"SOL","address":"vines1vzrYbzLMRdu58ou5XTby4qAqVRLmqo36NKPTg","limit":10}
Token accounts
POST /x402/sol/address/tokens · $0.005 per request
Body fields: network (string, required); address (string, required)
Example body: {"network":"SOL","address":"vines1vzrYbzLMRdu58ou5XTby4qAqVRLmqo36NKPTg"}
Broadcast transaction
POST /x402/sol/broadcast · $0.005 per request
Body fields: tx (string, required)
Example body: {"tx":"AQAAAA…"}
Charts
Hash rate
POST /x402/charts/hash-rate · $0.005 per request
Body fields: timespan (string, default 1y); sampled (boolean, default true); metadata (boolean, default false); rollingAverage (string, default 8h); cors (boolean, default false); format (one of json | csv, default json)
Example body: {"timespan":"1y","sampled":true,"metadata":false,"rollingAverage":"8h","cors":false,"format":"json"}
Avg confirmation time
POST /x402/charts/avg-confirmation-time · $0.005 per request
Body fields: timespan (string, default 1y); sampled (boolean, default true); metadata (boolean, default false); rollingAverage (string, default 8h); cors (boolean, default false); format (one of json | csv, default json)
Example body: {"timespan":"1y","sampled":true,"metadata":false,"rollingAverage":"8h","cors":false,"format":"json"}
Total bitcoins
POST /x402/charts/total-bitcoins · $0.005 per request
Body fields: timespan (string, default 1y); sampled (boolean, default true); metadata (boolean, default false); rollingAverage (string, default 8h); cors (boolean, default false); format (one of json | csv, default json)
Example body: {"timespan":"1y","sampled":true,"metadata":false,"rollingAverage":"8h","cors":false,"format":"json"}
Difficulty
POST /x402/charts/difficulty · $0.005 per request
Body fields: timespan (string, default 1y); sampled (boolean, default true); metadata (boolean, default false); rollingAverage (string, default 8h); cors (boolean, default false); format (one of json | csv, default json)
Example body: {"timespan":"1y","sampled":true,"metadata":false,"rollingAverage":"8h","cors":false,"format":"json"}
Transaction count
POST /x402/charts/n-transactions · $0.005 per request
Body fields: timespan (string, default 1y); sampled (boolean, default true); metadata (boolean, default false); rollingAverage (string, default 8h); cors (boolean, default false); format (one of json | csv, default json)
Example body: {"timespan":"1y","sampled":true,"metadata":false,"rollingAverage":"8h","cors":false,"format":"json"}
Market price
POST /x402/charts/market-price · $0.005 per request
Body fields: timespan (string, default 1y); sampled (boolean, default true); metadata (boolean, default false); rollingAverage (string, default 8h); cors (boolean, default false); format (one of json | csv, default json)
Example body: {"timespan":"1y","sampled":true,"metadata":false,"rollingAverage":"8h","cors":false,"format":"json"}
Transaction fees
POST /x402/charts/transaction-fees · $0.005 per request
Body fields: timespan (string, default 1y); sampled (boolean, default true); metadata (boolean, default false); rollingAverage (string, default 8h); cors (boolean, default false); format (one of json | csv, default json)
Example body: {"timespan":"1y","sampled":true,"metadata":false,"rollingAverage":"8h","cors":false,"format":"json"}
Transactions per block
POST /x402/charts/n-transactions-per-block · $0.005 per request
Body fields: timespan (string, default 1y); sampled (boolean, default true); metadata (boolean, default false); rollingAverage (string, default 8h); cors (boolean, default false); format (one of json | csv, default json)
Example body: {"timespan":"1y","sampled":true,"metadata":false,"rollingAverage":"8h","cors":false,"format":"json"}
Avg block size
POST /x402/charts/avg-block-size · $0.005 per request
Body fields: timespan (string, default 1y); sampled (boolean, default true); metadata (boolean, default false); rollingAverage (string, default 8h); cors (boolean, default false); format (one of json | csv, default json)
Example body: {"timespan":"1y","sampled":true,"metadata":false,"rollingAverage":"8h","cors":false,"format":"json"}
Market cap
POST /x402/charts/market-cap · $0.005 per request
Body fields: timespan (string, default 1y); sampled (boolean, default true); metadata (boolean, default false); rollingAverage (string, default 8h); cors (boolean, default false); format (one of json | csv, default json)
Example body: {"timespan":"1y","sampled":true,"metadata":false,"rollingAverage":"8h","cors":false,"format":"json"}
Blockchain size
POST /x402/charts/blocks-size · $0.005 per request
Body fields: timespan (string, default 1y); sampled (boolean, default true); metadata (boolean, default false); rollingAverage (string, default 8h); cors (boolean, default false); format (one of json | csv, default json)
Example body: {"timespan":"1y","sampled":true,"metadata":false,"rollingAverage":"8h","cors":false,"format":"json"}
Total transactions
POST /x402/charts/n-transactions-total · $0.005 per request
Body fields: timespan (string, default 1y); sampled (boolean, default true); metadata (boolean, default false); rollingAverage (string, default 8h); cors (boolean, default false); format (one of json | csv, default json)
Example body: {"timespan":"1y","sampled":true,"metadata":false,"rollingAverage":"8h","cors":false,"format":"json"}
UTXO count
POST /x402/charts/utxo-count · $0.005 per request
Body fields: timespan (string, default 1y); sampled (boolean, default true); metadata (boolean, default false); rollingAverage (string, default 8h); cors (boolean, default false); format (one of json | csv, default json)
Example body: {"timespan":"1y","sampled":true,"metadata":false,"rollingAverage":"8h","cors":false,"format":"json"}
Unique addresses
POST /x402/charts/n-unique-addresses · $0.005 per request
Body fields: timespan (string, default 1y); sampled (boolean, default true); metadata (boolean, default false); rollingAverage (string, default 8h); cors (boolean, default false); format (one of json | csv, default json)
Example body: {"timespan":"1y","sampled":true,"metadata":false,"rollingAverage":"8h","cors":false,"format":"json"}
Mining pools
POST /x402/charts/pools · $0.005 per request
Body fields: timespan (one of 24h | 2d | 4d | 7d | 10d | 6m | 1y | 2y | 3y, default 4d)
Example body: {"timespan":"4d"}