x402 census · derivatives-pricer-production.up.railway.app · e20bb78d4a61 · JSON
POST /v1/option/implied-vol
method-gated
When to use: one market premium → need σ̂ + Greeks; cheaper/faster than a full surface. Solves Black-Scholes IV then prices Greeks at the solved σ. Same engine as the surface endpoint (fastImpliedVol). Prefer surface when you have a multi-strike/maturity book. USDC exact on Solana/Base.
Verdict: not verified by an unpaid GET. 405/400: the 402 sits behind the declared method. This says nothing about whether the route works when called as declared.
Facts from the catalogs
| Field | Value |
|---|---|
| URL | https://derivatives-pricer-production.up.railway.app/v1/option/implied-vol |
| Method | POST |
| Price | $0.03 USDC = 30000 atomic units of 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 |
| Network | eip155:8453 (base); also accepts solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp |
| payTo | 0x34cfb8bdbf16e4484b7da0ed31deed5771b16c8f |
| Seller | derivatives-pricer-production.up.railway.app |
| Catalogs | cdp (row updated 2026-10-25), payai (row updated 2026-10-12) |
| Listed since (lower bound) | 2026-10-12 (earliest catalog timestamp; catalogs report last-update times only) |
| Last catalog update | 2026-10-25 |
| CDP quality counters | 1 calls and 1 unique payers in 30 days, last call 2026-10-10 (catalog-reported, not verified on chain) |
| Category (keyword rule) | crypto-data |
| Templated path | no |
| x402Version in catalog | 2 |
| Service name / tags | Single IV Solver · options, black-scholes, volatility, multi-chain, usdc |
Unpaid probe (census of 2026-10-22)
| Field | Value |
|---|---|
| Probed at | 2026-10-22T00:31:47.817Z |
| HEAD | 402 |
| GET | 405 |
| Verdict | method-gated 405/400: the 402 sits behind the declared method |
| 402 carried in | n/a |
| x402Version in the 402 | n/a |
| accepts[0] | none |
| Live amount equals catalog price | not comparable |
| Live payTo equals catalog payTo | not comparable |
| extensions.bazaar in the 402 | no |
| PAYMENT-REQUIRED header | no |
| WWW-Authenticate offer | none |
| Content type / server / CORS | application/json / railway-hikari / none |
| Latency | 238 ms |
| Error | none |
No hourly re-probe has reached this resource yet; the cron covers a rotating slice of 150 per hour.
On-chain facts for the payTo (public address)
| Field | Value |
|---|---|
| Distinct payers | 2 |
| Payments | 2 |
| USDC volume | $0.02 |
| Median payment | $0.01 |
| First / last payment | 2026-08-30 / 2026-09-14 |
| Sampler-shaped share of payments | 100.0% |
| Payers that are not samplers | 0 |
| Source | forensics-2026-09-30 |
| Address | 0x34cfb8bdbf16e4484b7da0ed31deed5771b16c8f (contract: EIP7702Proxy) |
Declared input and output (extensions.bazaar)
{
"input": {
"body": {
"dividendYield": 0,
"optionType": "call",
"premium": 10.45057562,
"rate": 0.05,
"strike": 100,
"timeToExpiry": 1,
"underlying": 100
},
"bodyType": "json",
"method": "POST",
"type": "http"
},
"output": {
"type": "json",
"example_truncated": true,
"chars": 552
}
}
Try it (unpaid: shows the 402)
curl -si -X POST 'https://derivatives-pricer-production.up.railway.app/v1/option/implied-vol' -H 'accept: application/json' -H 'content-type: application/json' --data '{}'
The catalog declares POST. A 402 answer carries the payment requirements in the JSON body and, for x402 v2, base64 in the PAYMENT-REQUIRED header. This page never sends a payment.
Paid checks (x402, USDC on Base)
GET https://bazaar.agentexchange.work/r/e20bb78d4a61/probe.json re-runs this probe right now for $0.01 and writes the result here. POST https://bazaar.agentexchange.work/featured with {"id":"e20bb78d4a61"} places this resource at the top of the report and search pages for 30 days for $1.00, labelled. Unpaid requests answer 402 with the terms. Pricing.
Catalog references: PayAI listing status · agentic.market (CDP Bazaar front end) · this record as JSON · all resources on derivatives-pricer-production.up.railway.app.