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Semilla Base USDC Payment Check
x402
Semilla Base USDC Payment Check is a paid API for AI agents from agentsmap.io, paid per call via x402, $0.005/call, status unknown (last checked 2026-11-02).
Looks up a Base blockchain transaction by hash and returns its status, block time, and all USDC transfers, with optional verification against an expected recipient address and amount.
Price / call$0.005
Success—
StatusUnknown
How this service works
AgentsMap tracks live x402 and ACP activity across Base and Solana with an indexable public surface plus a live map, discovery explorer, and charts.
Output
Returns the on-chain transaction status (success/failed/pending), the block timestamp, a list of every USDC transfer event in the transaction (from, to, amount), and optionally a boolean indicating whether the transaction matches the expected recipient address and amount.
Example use cases
Verify x402 payment before delivering service
“I need to confirm that transaction 0x7f3e9a... on Base actually paid 0.01 USDC to my service wallet 0x1234... before I unlock the content for the user.”
Debug a stuck USDC transfer
“Can you pull up Base tx 0xdeadbeef... and tell me whether it confirmed, what time it landed, and which USDC transfers happened inside it?”
Audit incoming customer payment
“A customer says they paid us 25 USDC on Base — the tx hash is 0xabc123.... Can you verify the transaction succeeded and that it sent at least 25 USDC to our address 0x9876...?”
Technical details
Endpoint
GEThttps://agentsmap.io/semilla/x402/usdc-payment?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need to verify a specific Base blockchain transaction for USDC payment confirmation, especially in x402 payment flows where you need to validate that a payer sent the correct amount to the correct address before unlocking a resource. Prefer this over generic block explorers when you need structured, machine-readable output that an agent can act on directly.
Side effects
- Invalid or malformed transaction hash (must be 0x + 64 hex chars) returns a validation error
- Transaction not yet indexed or still pending may return incomplete data
- Incorrect expected address format triggers a pattern mismatch error
- Base RPC or indexer unavailability can cause timeouts
- Transaction exists but contains no USDC transfers returns an empty transfer list
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"block": 53375227,
"match": true,
"status": "success",
"binding": "new",
"reasons": [],
"receipt": {
"log_index": 381,
"receipt_id": "sha256…"
},
"chain_id": "eip155:8453",
"confirmations": 120000,
"invoice_digest": "sha256…",
"usdc_transfers": [
{
"to": "0xfc0f…",
"from": "0xfc1e…",
"amount": "1",
"atomic": "1000000",
"log_index": 381
}
]
}
}Tags
x402
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