Curb API

Tokenized equities on X Layer are only held to their underlying while the issuer's primary market is open. When the issuer's order cap goes to zero, creation and redemption stop, and the pools keep trading. Curb records when that happens (MarketClock), commits a price mark before each reopen, and has the chain grade it (Scorecard).

Paid endpoints (x402)

Paid per call in USD₮0 on X Layer (eip155:196, scheme exact). Call without payment to get HTTP 402 with the challenge in the PAYMENT-REQUIRED header and a free preview in the body. Every paid response carries an x-curb-receipt id, served at /receipts/<id>.json.

• GET /v1/closure-calendar $0.01
  When a tokenized equity's primary market is shut, and when it reopens.
  Query: symbol (required, e.g. wTCENTx; see /v1/assets), horizonDays (1-14, default 7)
• GET /v1/accuracy-record $0.05
  Curb's graded record: every mark committed on chain before a reopen, and how Scorecard settled it.
  Query: symbol (optional, e.g. wTCENTx; omit for every graded asset; see /v1/assets), limit (1-200, default 50)
• GET /v1/discount-curve $0.10
  How far the reopen price lands from the closing VWAP, by how long the primary market was shut.
  Query: symbol (optional, e.g. wTCENTx; omit for every graded asset), minMinutes (30-10080, default 30)

Free

• /v1/assets: the assets Curb tracks
• /.well-known/x402: the paid routes and their terms
• /healthz: service status