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Blockscout Internal Transactions Lookup
x402
Blockscout Internal Transactions Lookup is a paid API for AI agents from api.blockscout.com, paid per call via x402, $0.002/call, status unknown (last checked 2026-09-13).
Retrieves all internal transactions (call traces) for a specific transaction hash on a given blockchain network via Blockscout's multichain explorer API
Price / call$0.002
Success—
StatusUnknown
How this service works
Explore crypto activities with Blockscout's multichain search. Find transactions, addresses, tokens, and dapps across top blockchain networks — your go-to explorer for cross-chain blockchain data
Output
Returns a paginated list of internal transactions for the given tx hash, each containing: from/to addresses (with metadata like ENS name, scam flags, public tags, contract status), transfer value, call type, gas limit, success/error status, timestamp, block number, and any created contract address. Includes next_page_params for pagination.
Example use cases
DeFi swap internal call trace
“I just sent a Uniswap transaction on Ethereum — tx hash is 0xd3f12...abc — can you show me all the internal calls and value transfers that happened inside it using Blockscout?”
Failed transaction debug
“My transaction 0x9fa34...bee on chain 137 (Polygon) failed. Can you fetch its internal transactions from Blockscout so I can see which internal call threw an error?”
Smart contract creation audit
“For transaction hash 0x77c01...d12 on Base (chain ID 8453), can you list all internal transactions and tell me if any new contracts were created as part of it?”
Technical details
Endpoint
GEThttps://api.blockscout.com/%7Bchain_id%7D/api/v2/transactions/%7Btransaction_hash_param%7D/internal-transactionsWhen to prefer
Use this endpoint when you need to deeply inspect the internal call tree of a specific transaction — especially for debugging failed transactions, auditing DeFi interactions, tracing value flows inside smart contract executions, or detecting contract creations triggered mid-transaction. Prefer this over top-level transaction APIs when you need sub-call granularity across any of the supported Blockscout chains.
Side effects
- Invalid or malformed transaction hash returns error or empty result
- Unsupported chain_id returns 404 or empty response
- Transaction with no internal calls returns empty items array
- Rate limiting or payment failure returns 402 or 429
- Network unavailability causes timeout or 503
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"meta": {
"status": 0,
"message": "string"
},
"items": [
{
"to": {},
"from": {
"hash": "string",
"name": "string",
"is_scam": true,
"metadata": {},
"proxy_type": "string",
"reputation": "string",
"is_contract": true,
"is_verified": true,
"public_tags": [
{
"label": "string",
"address_hash": "string",
"display_name": "string"
}
],
"private_tags": [
{
"label": "string",
"address_hash": "string",
"display_name": "string"
}
],
"ens_domain_name": "string",
"implementations": [
{
"name": "string",
"address_hash": "string"
}
],
"watchlist_names": [
{
"label": "string",
"display_name": "string"
}
]
},
"type": "string",
"error": "string",
"index": 0,
"value": "string",
"success": true,
"gas_limit": "string",
"timestamp": "string",
"block_number": 0,
"created_contract": {},
"transaction_hash": "string",
"transaction_index": 0
}
],
"next_page_params": {}
}
}Tags
x402
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