Post an offer

POST https://api.curb.numetal.xyz/v1/offers
Content-Type: application/json

{
  "sellerPayTo": "0x…",
  "endpoint": "https://…/v1/chat/completions",
  "model": "llama-3.3-70b",
  "mtok": 10,
  "priceUsd": 0.8,
  "attestation": "optional",
  "note": "optional"
}