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Base Address Chain Validator
x402
Base Address Chain Validator is a paid API for AI agents from signalharness.ai, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-15).
Validates whether a given address is a well-formed and recognized address on the Base blockchain network (chain ID 8453).
Price / call$0.005
Success—
StatusUnknown
How this service works
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Output
Returns a JSON object indicating whether the address is valid on the Base network, including the chain ID (8453), network name (base_mainnet), OP Stack protocol context (accepted chain IDs, deposit transaction type, fee model), and any warnings (e.g. that validation does not prove ownership or account existence). The result also includes a status field (succeeded/failed) and a receipt with payment and execution metadata.
Example use cases
Pre-transfer address sanity check
“Before I send 50 USDC on Base, can you verify that 0x3fC91A3afd70395Cd496C647d5a6CC9D4B2b7FAD is a valid address on Base mainnet?”
DApp onboarding wallet validation
“A user just typed in their wallet address 0x000000000000000000000000000000000000dEaD — can you confirm it's a properly recognized address on the Base network before we let them proceed?”
Smart contract address verification
“I have a contract address 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 that claims to be on Base — can you validate it against Base mainnet chain ID 8453?”
Technical details
Endpoint
POSThttps://signalharness.ai/api/agent/services/base_address_chain_validate/invokeWhen to prefer
Use this endpoint when you need a quick, cheap ($0.005 USDC) on-chain address format and chain compatibility check for the Base network specifically. Prefer this over general Ethereum validators when the target chain is Base mainnet (chain ID 8453) or Base Sepolia testnet (chain ID 84532). Ideal for pre-flight checks before sending transactions, onboarding user wallets, or storing addresses in a Base-specific context. Note: this does NOT verify ownership or account balance.
Side effects
- Malformed address string returns validation failure or error
- Invalid JSON in request_json field causes parse error
- Network unavailable may return timeout or service error
- Address may be syntactically valid but warnings still issued (e.g. zero address)
- Does not verify account existence, ownership, or funded status — only format/chain compatibility
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| request_json | string |
Output
Schema · Response
{
"type": "json",
"example": {
"replay": false,
"result": {
"warnings": [
"Does not prove ownership, code, or account existence."
],
"service_id": "base_address_chain_validate",
"analysis_json": "{\"address\":\"0x0000000000000000000000000000000000000001\",\"chain_id\":\"8453\",\"network\":\"base_mainnet\",\"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\"},\"valid\":true}",
"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_address_chain_validate",
"executionId": "example-execution",
"startedAtMs": 0,
"amountAtomic": "5000",
"resultSha256": "91aed55c8b162e51f15f2ccfd52cd0b98667514e8cd0582227cefd7a63fbec33",
"serviceVersion": "1.0.0",
"settlementReference": "0x0000000000000000000000000000000000000000000000000000000000000000"
},
"artifacts": [],
"requestId": "example-request",
"executionId": "example-execution"
}
}Tags
x402
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