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Delx Base USDC Payment Match
x402
Delx Base USDC Payment Match is a paid API for AI agents from api.delx.ai, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-15).
Validates that a Base chain USDC payment's recipient and amount match expected values for pre-flight payment verification.
Price / call$0.001
Success—
StatusUnknown
How this service works
Base USDC Payment Match: Base USDC Payment Match checks recipient, raw amount, and chain id for a Base USDC payment intent from bounded caller-supplied values without an external provider. Call Base USDC Payment Match before signing, submitting, replacing, or accepting an EVM/Base transaction assembled from caller-owned data. Returns normalized transaction evidence, calculated budget or shape findings, and a fail-closed preflight status for Base USDC Payment Match as versioned deterministic JSO…
Output
Returns a JSON object with boolean flags for amount_match and recipient_match, a base_chain flag confirming the chain ID maps to Base, the resolved chain_id, overall status ('pass' or similar), and evidence metadata including a SHA-256 hash of the input and a confirmation that no data was retained and no external calls were made.
Example use cases
x402 agent payment pre-flight check
“I'm about to unlock a premium data feed for my agent — can you confirm the Base USDC payment (chain 8453) was sent to 0xVendorWallet with 5000000 raw units, matching expected recipient 0xVendorWallet and expected amount 5000000, before I proceed?”
Automated billing recipient verification
“My billing system just received a USDC transfer on Base — please check whether the recipient is 0xMyTreasuryAddress and the raw amount is 2000000, matching expected recipient 0xMyTreasuryAddress and expected amount 2000000, so I know it's safe to mark the invoice paid.”
Multi-step agent workflow payment gate
“Before my agent moves to the next workflow step, validate that the Base chain USDC payment (chain ID 8453) matches: recipient 0xServiceWallet, raw amount 500000, expected recipient 0xServiceWallet, expected amount 500000 — only continue if both recipient and amount match.”
Technical details
Endpoint
POSThttps://api.delx.ai/api/v1/x402/base-usdc-payment-matchWhen to prefer
Use this endpoint when an AI agent or automated workflow needs to pre-flight verify a Base chain USDC payment's recipient and amount before taking a downstream action — especially in x402 payment flows where confirming payment integrity without side effects or data retention is critical. Prefer this over on-chain RPC calls when you need a lightweight, stateless, privacy-preserving match check with an audit hash.
Side effects
- Mismatched recipient address returns recipient_match: false
- Mismatched amount returns amount_match: false
- Invalid or unsupported chain_id may return unexpected base_chain flag
- Malformed address strings may cause validation errors
- Missing required fields returns a schema validation error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| chain_id | integer | Chain Id supplied to Base USDC Payment Match; used only for this bounded calculation and processed in memory without retention. |
| recipient | string | Recipient supplied to Base USDC Payment Match; used only for this bounded calculation and processed in memory without retention. |
| amount_raw | string | Amount Raw supplied to Base USDC Payment Match; used only for this bounded calculation and processed in memory without retention. |
| expected_recipient | string | Expected Recipient supplied to Base USDC Payment Match; used only for this bounded calculation and processed in memory without retention. |
| expected_amount_raw | string | Expected Amount Raw supplied to Base USDC Payment Match; used only for this bounded calculation and processed in memory without retention. |
Output
Schema · Response
{
"type": "json",
"example": {
"result": {
"chain_id": 8453,
"base_chain": true,
"amount_match": true,
"recipient_match": true
},
"schema": "delx/util-base-usdc-payment-match/v1",
"status": "pass",
"evidence": {
"retained": false,
"input_sha256": "5bea38f8336c21a3b1abcc4b38ff40491f8b1c58ef31c75c8dbb711392e5bc09",
"external_calls": 0
},
"operation": "evm_preflight:base_usdc_payment_match"
}
}Tags
x402
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