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RelayHop Payment Verifier (Base Chain)
x402
RelayHop Payment Verifier (Base Chain) is a paid API for AI agents from payment-verifier-cdp.relayhop.workers.dev, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-15).
Verifies on-chain transactions on the Base network, returning verified status, amount, sender, recipient, block number, and confirmation signals for a given transaction hash.
Price / call$0.005
Success—
StatusUnknown
How this service works
Real-time on-chain payment verification and check via Base RPC. Returns structured signals: verified status, amount, sender, recipient, transaction confirmation, block number. Pay $0.005 USDC per check. Covers payment, transaction, address, contract, score, signals.
Output
Returns a JSON object with: verified (boolean), amount (string), sender (address), recipient (address), asset (e.g. USDC), chain (e.g. base), tx_hash, block_number (integer), confirmed_at (timestamp), and a signals array of descriptive tags about the transaction.
Example use cases
Fraud detection in e-commerce checkouts
“I just got a customer order confirmation from someone who claims they paid with USDC on Base. Can you check if transaction 0x7a2f8c1d9e3b4a6f5c2d8e1a7f3c9b4e6d2a8f1c5e7b9d3a6f2c8e1b4a7d9 actually went through and confirm the amount matches their invoice?”
Marketplace seller payment settlement verification
“One of our sellers says they sent us their weekly earnings through Base. Can you look up transaction 0x9c5e2b7d1f3a8c6e4b2d9f5a1c7e3b8d6a4f2c9e1b5d7a3f6c2e8b4d9a1f and tell me if it's confirmed yet, how much they sent, and which wallet it came from?”
Dispute resolution for blocked transactions
“A customer disputes that their USDC payment on Base went through for their purchase. Let me verify this by checking the transaction details at 0x3f1a9d8c4b6e2f7a5d3c8e1b9f4a6d2c7e5b3a8f1d6c9e2a7f4b1d8c5e3a9 to see if it actually confirmed and show them proof of who sent and received the funds.”
Technical details
Endpoint
GEThttps://payment-verifier-cdp.relayhop.workers.dev/v1/checkWhen to prefer
Use this endpoint when you need real-time on-chain confirmation of a specific Base network transaction, especially to programmatically verify payments or smart contract interactions using a transaction hash. Ideal for post-payment confirmation flows, receipt validation, or fraud checks in Base/USDC-based payment pipelines.
Side effects
- Invalid or malformed transaction hash returns an error or unverified status
- Transaction not yet confirmed may return verified: false
- Transaction on a chain other than Base will not resolve
- Network RPC errors or timeouts may cause incomplete responses
- Missing required 'tx' query parameter returns a validation error
Input
{
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"tx": "0x4f3c2a1b8e7d6f5a9c0b2e4d1f8a3c7e6b5d4f2a1e9c8b7a6d5f4e3c2b1a0f9e"
}
}
}Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
{
"chain": "base",
"signals": [
"not_found"
],
"tx_hash": "0x4f3c2a1b8e7d6f5a9c0b2e4d1f8a3c7e6b5d4f2a1e9c8b7a6d5f4e3c2b1a0f9e",
"verified": false
}Tags
x402
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