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Base Token Flow Reconstruct
x402
Base Token Flow Reconstruct is a paid API for AI agents from signalharness.ai, paid per call via x402, $0.02/call, status unknown (last checked 2026-09-13).
Reconstructs and analyzes token transfer flows on the Base blockchain, building a per-account ledger of inflows, outflows, and net positions from caller-supplied transfer data.
Price / call$0.02
Success—
StatusUnknown
How this service works
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Output
Returns a JSON analysis containing a per-account ledger (each entry with account address, asset contract, chain ID, in-amount, out-amount, and net amount), a network context block (accepted chain IDs, fee model, protocol family), and a total transfer count. Also includes evidence scope, analyzed network identifier, and warnings about data provenance limitations.
Example use cases
Audit USDC movement in a DeFi transaction
“I have a list of USDC transfer events from a Base mainnet transaction batch — can you reconstruct the flow and show me each wallet's net USDC position, what they sent, and what they received?”
Trace token distribution from airdrop
“Here are the token transfer records from our airdrop on Base — reconstruct the flow so I can see how many tokens each recipient address actually received net of any returns or bounces.”
Investigate suspicious wallet activity
“I've pulled a set of ERC-20 transfer logs involving a suspected wash-trading wallet on Base — reconstruct the flow ledger so I can see how tokens moved in and out of each involved address.”
Technical details
Endpoint
POSThttps://signalharness.ai/api/agent/services/base_token_flow_reconstruct/invokeWhen to prefer
Choose this endpoint when you have a set of already-fetched on-chain token transfer records and need to aggregate them into a clean per-wallet ledger showing net flows — it does not fetch on-chain data itself, so it's best paired with a transfer-fetching step. Prefer this over generic blockchain explorers when you need structured, machine-readable net-flow analysis specifically for Base (OP Stack) with deterministic accounting guarantees.
Side effects
- Malformed or invalid request_json causes parsing failure
- Transfer data referencing unsupported chain IDs outside Base (8453) and Base Sepolia (84532) may produce incomplete results
- Missing or incorrect decimal metadata could cause amount misinterpretation (service warns decimals are never invented)
- Empty transfer list returns a zero-entry ledger with warnings
- Payment failure via x402 returns HTTP 402 before execution begins
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| request_json | string |
Output
Schema · Response
{
"type": "json",
"example": {
"replay": false,
"result": {
"warnings": [
"Results cover only supplied transfers and decimals are never invented."
],
"service_id": "base_token_flow_reconstruct",
"analysis_json": "{\"ledger\":[{\"account\":\"0x0000000000000000000000000000000000000001\",\"asset\":\"0x0000000000000000000000000000000000000001\",\"chain\":\"8453\",\"in\":\"0\",\"net\":\"-100\",\"out\":\"100\"},{\"account\":\"0x0000000000000000000000000000000000000002\",\"asset\":\"0x0000000000000000000000000000000000000001\",\"chain\":\"8453\",\"in\":\"100\",\"net\":\"100\",\"out\":\"0\"}],\"network_context\":{\"accepted_chain_ids\":[\"8453\",\"84532\"],\"deposit_transaction_type\":\"0x7e\",\"fee_model\":\"L2 execution plus caller-supplied L1 data/operator components\",\"protocol_family\":\"OP Stack\"},\"transfer_count\":1}",
"evidence_scope": "caller_supplied_data",
"analyzed_network": "base"
},
"status": "succeeded",
"receipt": {
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"usage": [],
"status": "succeeded",
"network": "eip155:8453",
"artifacts": [],
"endedAtMs": 0,
"latencyMs": 0,
"paymentId": "example-payment",
"receiptId": "example-receipt",
"requestId": "example-request",
"serviceId": "base_token_flow_reconstruct",
"executionId": "example-execution",
"startedAtMs": 0,
"amountAtomic": "20000",
"resultSha256": "3407df0907e5ed4eaf12a1e6ffcd90cd296b2da68ac296d10cc888b629ff660e",
"serviceVersion": "1.0.0",
"settlementReference": "0x0000000000000000000000000000000000000000000000000000000000000000"
},
"artifacts": [],
"requestId": "example-request",
"executionId": "example-execution"
}
}Tags
x402
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