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SignalHarness Address Checksum
x402
SignalHarness Address Checksum is a paid API for AI agents from signalharness.ai, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-13).
Converts an Ethereum-style address to its EIP-55 checksummed form and returns any associated warnings
Price / call$0.005
Success—
StatusUnknown
How this service works
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Output
Returns the EIP-55 checksummed version of the submitted Ethereum address, along with any warnings about the input, an evidence scope field indicating the data source, and a service ID. Also includes a full execution receipt with payment details, latency, and a SHA-256 hash of the result.
Example use cases
Normalize address before on-chain transfer
“Before I send funds, can you convert this address to its proper checksummed form: 0xab5801a7d398351b8be11c439e05c5b3259aec9b?”
Validate wallet address in user onboarding
“A user just submitted this wallet address during signup — 0xde0b295669a9fd93d5f28d9ec85e40f4cb697bae — can you checksum it and tell me if there are any warnings?”
Sanitize address from external data source
“I pulled this address from a CSV file and I'm not sure if the casing is correct: 0xc02aaa39b223fe8d0a0e5c4f27ead9083c756cc2 — can you run it through the EIP-55 checksum and give me the properly formatted version?”
Technical details
Endpoint
POSThttps://signalharness.ai/api/agent/services/address_checksum/invokeWhen to prefer
Choose this endpoint when you need a simple, fast, paid-per-call API to normalize Ethereum addresses to EIP-55 mixed-case checksum format, especially within agent workflows that already use x402 micropayments on Base. It is purpose-built for blockchain address normalization and returns structured output with a receipt, making it suitable for audit trails in agent pipelines.
Side effects
- Invalid or unparseable address string returns an error or warnings in the result
- Address string too short (under 2 characters) or exceeds 65536 characters will be rejected by schema validation
- Non-hex or malformed address may produce warnings rather than a hard failure
- Network or payment failures may result in a non-succeeded status in the receipt
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| address_checksum_request | string |
Output
Schema · Response
{
"type": "json",
"example": {
"replay": false,
"result": {
"warnings": [
"Checksum normalization does not prove ownership or contract identity."
],
"service_id": "address_checksum",
"evidence_scope": "caller_supplied_data",
"checksummed_address": "{\"address\":\"0x0000000000000000000000000000000000000001\"}"
},
"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": "address_checksum",
"executionId": "example-execution",
"startedAtMs": 0,
"amountAtomic": "5000",
"resultSha256": "06bd30b59a10c7002c04b6cd85eb68b782ba7e432fa3224547e7f818f7937fbf",
"serviceVersion": "1.0.0",
"settlementReference": "0x0000000000000000000000000000000000000000000000000000000000000000"
},
"artifacts": [],
"requestId": "example-request",
"executionId": "example-execution"
}
}Tags
x402
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