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SignalHarness ERC20 Transfer Decode
x402
SignalHarness ERC20 Transfer Decode is a paid API for AI agents from signalharness.ai, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-13).
Decodes and interprets an ERC20 token transfer request, returning structured details about the transfer including warnings and evidence scope.
Price / call$0.01
Success—
StatusUnknown
How this service works
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Output
Returns a JSON object containing the decoded ERC20 transfer details (recipient address, token amount, method), a list of any warnings about the transfer, an evidence scope indicator noting the data is caller-supplied, a status field, and a full receipt with payment and execution metadata including network (Base/eip155:8453), asset contract address, latency, and a result SHA256 hash for verification.
Example use cases
Auditing suspicious token transfer
“I just intercepted this ERC20 transfer payload from an unknown contract interaction — can you decode it and tell me what token is being transferred, to whom, and if there are any warnings: '0xa9059cbb0000000000000000000000001234567890abcdef1234567890abcdef12345678000000000000000000000000000000000000000000000000016345785d8a0000'?”
Wallet UI transfer preview
“Before my user confirms this transaction, decode this raw ERC20 transfer request so I can show them human-readable details about what they're about to sign: '0xa9059cbb000000000000000000000000deadbeefdeadbeefdeadbeefdeadbeefdeadbeef0000000000000000000000000000000000000000000000008ac7230489e80000'.”
DeFi agent safety check
“My agent is about to execute an ERC20 transfer on behalf of a user — please decode this transfer request string and flag any warnings before we proceed: '0xa9059cbb000000000000000000000000ffffffffffffffffffffffffffffffffffffffff00000000000000000000000000000000000000000000003635c9adc5dea00000'.”
Technical details
Endpoint
POSThttps://signalharness.ai/api/agent/services/erc20_transfer_decode/invokeWhen to prefer
Choose this endpoint when you need a lightweight, pay-per-call API to decode ERC20 transfer calldata or request strings without running a full node or ABI decoder locally. It is particularly useful for AI agents performing safety checks before signing transactions, wallets rendering human-readable transfer previews, or audit pipelines flagging suspicious transfers. At $0.01 USDC per call via x402, it is cost-effective for on-demand single-transfer decoding on the Base network.
Side effects
- Malformed or non-ERC20 transfer input string returns an error or warnings in the decoded result
- Input string too short (below minLength of 2) or too long (above maxLength of 65536) causes validation failure
- Non-transfer ABI selector in input may decode incorrectly or produce warnings
- Payment failure via x402 protocol results in 402 response before execution
- Network issues on Base (eip155:8453) may cause timeouts
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| erc20_transfer_request | string |
Output
Schema · Response
{
"type": "json",
"example": {
"replay": false,
"result": {
"warnings": [
"Decoding does not prove token standard compliance or transfer success."
],
"service_id": "erc20_transfer_decode",
"evidence_scope": "caller_supplied_data",
"decoded_erc20_transfer": "{\"args\":[\"0x0000000000000000000000000000000000000002\",\"10\"],\"kind\":\"calldata\",\"operation\":\"transfer\"}"
},
"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": "erc20_transfer_decode",
"executionId": "example-execution",
"startedAtMs": 0,
"amountAtomic": "10000",
"resultSha256": "15bea730a9255c4a291fc108c7d928b1821ecf8d893077a511fd2eb7e23acd4e",
"serviceVersion": "1.0.0",
"settlementReference": "0x0000000000000000000000000000000000000000000000000000000000000000"
},
"artifacts": [],
"requestId": "example-request",
"executionId": "example-execution"
}
}Tags
x402
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