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Oblique Markets x402 Settlement Verification
x402
Oblique Markets x402 Settlement Verification is a paid API for AI agents from api.oblique.markets, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-13).
Verifies on-chain x402 payment settlement on Base mainnet by fetching transaction receipts, decoding USDC Transfer events, and issuing a persistent verification receipt
Price / call$0.01
Success—
StatusUnknown
How this service works
Use when an agent needs settlement verify. Returns Real on-chain x402 settlement verification on Base mainnet: fetches the transaction receipt via JSON-RPC, decodes USDC Transfer events (payer, payee, amount), reports success/reverted status and confirmation depth, and issues a persistent verification_id receipt. $0.01.
Output
Returns the decoded USDC Transfer event details including payer address, payee address, and transferred amount; the transaction status (success or reverted); confirmation depth on Base mainnet; and a persistent verification_id receipt that can be stored as proof of settlement.
Example use cases
Confirm payment before delivering goods
“I just received an x402 payment claim for transaction 0xdef456 on Base — can you verify it actually settled on-chain, confirm the USDC amount transferred, and give me a verification ID I can store as proof of payment before I release the digital content?”
Audit trail for automated agent payments
“My AI agent made a series of x402 USDC micropayments on Base mainnet — can you verify transaction 0x789abc settled successfully, tell me the confirmation depth, and issue a verification receipt so I have a permanent audit trail?”
Debug a reverted x402 transaction
“A customer says their x402 USDC payment on Base went through but I never got credit — can you check transaction 0x321fed, tell me whether it succeeded or reverted, decode the Transfer event details, and give me a verification ID?”
Technical details
Endpoint
POSThttps://api.oblique.markets/api/v1/paid/settlement-verifyWhen to prefer
Choose this endpoint when you need cryptographic on-chain confirmation of an x402 USDC payment on Base mainnet, specifically when you require decoded Transfer event data (payer, payee, amount) and a persistent verification_id receipt. Prefer this over manual block explorer lookups when building automated payment verification workflows, settling disputes about whether a micropayment occurred, or needing a machine-readable proof-of-payment artifact. Particularly well-suited for x402 protocol integrations on Base.
Side effects
- Transaction hash not found or not yet indexed — returns error if the tx is too recent or invalid
- Transaction reverted — reports reverted status with no Transfer event decoded
- Non-USDC transfer — may fail to decode expected Transfer events if a different token or contract was used
- Network RPC errors — JSON-RPC call to Base mainnet may time out or fail under congestion
- Invalid input format — malformed transaction hash returns validation error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| tx_hash | string | Transaction hash to verify on Base mainnet |
| chain_id | integer | Chain id (only 8453, Base mainnet, is supported) |
Output
Schema · Response
{
"type": "json",
"example": {
"found": true,
"payee": "0x209693bc6afc0c5328ba36faf03c514ef312287c",
"payer": "0x1c7d4b196cb0c7b01d743fbc6116a902379c7238",
"status": "success",
"stored": true,
"settled": true,
"tx_hash": "0x9a1de1a4c3f2b06a7c55e01d9f4b2b6f0e8a33c15d7f90ab12cd34ef56ab78cd",
"chain_id": 8453,
"transfers": [
{
"to": "0x209693bc6afc0c5328ba36faf03c514ef312287c",
"from": "0x1c7d4b196cb0c7b01d743fbc6116a902379c7238",
"amount_usdc": 0.01,
"amount_atomic": "10000"
}
],
"amount_usdc": 0.01,
"verified_at": "2026-08-10T12:00:00.000Z",
"block_number": 33421187,
"confirmations": 512,
"verification_id": "7f3c1a90-2b44-4e0b-9a71-8d2f5c6e1b23"
}
}Tags
x402
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