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CURB Agent-to-Agent Inference Swap Payment
x402
CURB Agent-to-Agent Inference Swap Payment is a paid API for AI agents from api.curb.numetal.xyz, paid per call via x402, $0.1/call, status unknown (last checked 2026-09-14).
Settles a peer-to-peer inference swap match by processing USDC payment via x402 protocol on Base or Solana
Price / call$0.1
Success—
StatusUnknown
How this service works
CURB clears peer-to-peer inference swaps. We accept payment in USDC on x402 on both Base and Solana, and via pay.sh on Solana. No upstream keys on the hub.
Output
Returns a JSON object with an 'ok' boolean indicating settlement success, a 'probe' boolean indicating whether this was a probe-only acknowledgment, and a 'message' string describing the outcome. Real settlements return ok:true with confirmation; unpaid probes return a probe acknowledgment only.
Example use cases
Agent pays for inference on demand
“I have a matched inference swap on CURB with match ID xyz789 — go ahead and settle it so my agent can get the compute it needs.”
Automated agent fleet inference billing
“My orchestration agent just got a CURB match for ID match-4421, settle the payment so the downstream inference can proceed.”
Cross-chain swap settlement on Solana
“Settle CURB inference swap match-0099 — use Solana for the USDC payment and include the note 'nightly model eval run'.”
Technical details
Endpoint
POSThttps://api.curb.numetal.xyz/v1/matches/%7Bid%7D/payWhen to prefer
Use this endpoint when you have a confirmed CURB match ID and need to finalize settlement of a peer-to-peer inference swap using USDC on Base or Solana via x402. Prefer CURB when you want decentralized agent-to-agent inference clearing without requiring upstream API keys on the hub, and when operating on Base or Solana chains with x402-compatible payment flow.
Side effects
- Missing or invalid x402 payment header returns a 402 Payment Required error
- Invalid or unknown match ID returns a 404 or error response
- Insufficient USDC balance causes payment failure
- Match already settled results in a conflict or idempotency error
- Probe-only call without real payment returns probe ack rather than real settlement confirmation
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| note | string | Optional; ignored on unpaid probe. |
Output
Schema · Response
{
"type": "json",
"example": {
"ok": true,
"probe": true,
"message": "Probe ack only — settle real swaps via POST /v1/matches/{id}/pay"
}
}Tags
x402
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