HALOWERK marktwerk
Reads the public option book summaries of Deribit and aggregates them per expiry. iv_atm is the mark implied volatility of the strike closest to the forward, averaged over call and put, and the strike used is named. term_structure lists iv_atm against days to expiry. put_call_ratio is reported twice and never mixed: once by 24h volume and once by open interest. open_interest_by_strike and key_strikes show where positions actually sit, above and below the forward. max_pain comes with the complete
OtherLiveeip155:8453Exactvia cdp
Calls · 30d
1→ 0%
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 16 snapshots so far.
$11.47
Verified settled volume
2,654 settlements proven x402 by their on-chain EIP-3009 marker.
$0.0080
Listed price
As published in the catalog. Always read the live 402 before paying.
1
Calls · 30d
Upstream's own call count for this endpoint, not ours.
1
Unique payers · 30d
Last called 2026-08-09 18:19Z
—
Upstream on-chain volume
Reported by the source catalog.
Paid to
0x2880EdfFF13100677Bf97A3CBdF3Bc34771C4E5EThe wallet the 402 directs payment to. Its whole payment record — every payer, every chain — is on the merchant page.
Asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913
Provider
The payTo wallet does not resolve to a registered ERC-8004 agent. That is not a verdict on the service — most of the catalog is unregistered.
Live 402 challenge
Captured by the enrichment pass, not read just now. Prices can change — always read the 402 the endpoint answers with.
{
"docs": "https://markt.halowerk.com/llms.txt",
"name": "options_snapshot",
"error": "payment_required",
"accepts": [
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"asset": "USDC",
"version": "2",
"eip712Domain": {
"name": "USD Coin",
"chainId": 8453,
"version": "2",
"verifyingContract": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913"
},
"network_name": "Base Mainnet",
"assetTransferMethod": "eip3009"
},
"payTo": "0x2880EdfFF13100677Bf97A3CBdF3Bc34771C4E5E",
"amount": "8000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
}
],
"pricing": "https://markt.halowerk.com/pricing",
"summary": "Deribit options snapshot for BTC or ETH: at the money implied volatility per expiry, the term structure, put call ratios split by volume and by open interest, open interest per strike, key strikes and max pain with its full calculation.",
"resource": {
"url": "https://markt.halowerk.com/options",
"iconUrl": "https://markt.halowerk.com/favicon.svg",
"mimeType": "application/json",
"description": "Reads the public option book summaries of Deribit and aggregates them per expiry. iv_atm is the mark implied volatility of the strike closest to the forward, averaged over call and put, and the strike used is named. term_structure lists iv_atm against days to expiry. put_call_ratio is reported twice and never mixed: once by 24h volume and once by open interest. open_interest_by_strike and key_strikes show where positions actually sit, above and below the forward. max_pain comes with the complete",
"serviceName": "HALOWERK marktwerk"
},
"extensions": {
"bazaar": {
"info": {
"input": {
"body": {
"underlying": "BTC"
},
"type": "http",
"method": "POST",
"bodyType": "json"
}
},
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"input"
],
"properties": {
"input": {
"type": "object",
"required": [
"type",
"method",
"bodyType",
"body"
],
"properties": {
"body": {
"type": "object",
"required": [
"underlying"
],
"properties": {
"expiry": {
"type": "string",
"default": "naechste",
"description": "naechste for the nearest expiry, an exact date as YYYY-MM-DD, or alle for every open expiry."
},
"underlying": {
"enum": [
"BTC",
"ETH",
"btc",
"eth"
],
"type": "string",
"description": "Underlying. Deribit lists crypto options for BTC and ETH."
},
"moneyness_range": {
"type": "number",
"default": 0.3,
"maximum": 1,
"minimum": 0.1,
"description": "How far strikes may sit from the forward to be listed, as a fraction. 0.3 means plus or minus 30 percent."
}
},
"additionalProperties": false
},
"type": {
"type": "string",
"const": "http"
},
"method": {
"enum": [
"POST",
"PUT",
"PATCH"
],
"type": "string"
},
"bodyType": {
"enum": [
"json",
"form-data",
"text"
],
"type": "string"
}
},
"additionalProperties": false
}
}
}
}
},
"price_usdc": "0.008",
"description": "Reads the public option book summaries of Deribit and aggregates them per expiry. iv_atm is the mark implied volatility of the strike closest to the forward, averaged over call and put, and the strike used is named. term_structure lists iv_atm against days to expiry. put_call_ratio is reported twice and never mixed: once by 24h volume and once by open interest. open_interest_by_strike and key_strikes show where positions actually sit, above and below the forward. max_pain comes with the complete calculation and the payout curve so a buyer can recompute it. Greeks are only ever taken from the exchange: skew_25d is derived from the deltas Deribit itself publishes, uses the traded strikes nearest to delta 0.25 without interpolation, names both contracts, and is only computed for a single expiry because it costs one request per contract. unusual_volume needs twenty days of per strike history which this hub does not yet hold, so it stays null with that reason rather than being invented.",
"inputSchema": {
"type": "object",
"required": [
"underlying"
],
"properties": {
"expiry": {
"type": "string",
"default": "naechste",
"description": "naechste for the nearest expiry, an exact date as YYYY-MM-DD, or alle for every open expiry."
},
"underlying": {
"enum": [
"BTC",
"ETH",
"btc",
"eth"
],
"type": "string",
"description": "Underlying. Deribit lists crypto options for BTC and ETH."
},
"moneyness_range": {
"type": "number",
"default": 0.3,
"maximum": 1,
"minimum": 0.1,
"description": "How far strikes may sit from the forward to be listed, as a fraction. 0.3 means plus or minus 30 percent."
}
},
"additionalProperties": false
},
"price_model": "per_call",
"x402Version": 2,
"instructions": "Sign the accepted terms with an x402 client and repeat the request with the payment header.",
"outputSchema": {
"type": "object",
"properties": {
"spot": {
"type": [
"number",
"null"
]
},
"cache": {
"enum": [
"hit",
"miss"
],
"type": "string"
},
"venue": {
"type": "string"
},
"age_ms": {
"type": "integer"
},
"hinweis": {
"type": "string"
},
"expiries": {
"type": "array",
"items": {
"type": "object"
}
},
"skew_25d": {
"type": [
"object",
"null"
]
},
"ts_fetched": {
"type": "integer"
},
"underlying": {
"type": "string"
},
"source_urls": {
"type": "array",
"items": {
"type": "string"
}
},
"oldest_age_ms": {
"type": "integer"
},
"contracts_used": {
"type": "integer"
},
"term_structure": {
"type": "array",
"items": {
"type": "object"
}
},
"unusual_volume": {
"type": "null"
},
"contracts_total": {
"type": "integer"
},
"moneyness_range": {
"type": "number"
},
"unavailable_fields": {
"type": "array",
"items": {
"type": "string"
}
},
"unusual_volume_reason": {
"type": "string"
}
}
},
"payment_header": "PAYMENT-SIGNATURE",
"capability_request": {
"url": "https://bedarf.halowerk.com/capabilities/request",
"cost": "free",
"method": "POST",
"description": "Missing a capability, or does the scope not fit? Report the need here - no payment required. Similar reports are bundled; the response returns an id you can check back on.",
"body_example": {
"max_price": 0.01,
"description": "what exactly is needed",
"requested_capability": "short label"
}
}
}Accepts
The payment requirements as published to the catalog. Read the live 402 before paying — a price here is a claim, not a quote.
0.008USDC≈ $0.008 USD
on Base · exact scheme
Pay 0.008 USDC on Base to 0x2880…C4E5E. The signed payment is good for 5 minutes.
- Paid to
- 0x2880…C4E5E
- USD Coin contract
- 0x8335…02913
- Payment window
- 5 minutes
- As published
- 8000 smallest units
The catalog’s raw entry
[
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"asset": "USDC",
"version": "2",
"eip712Domain": {
"name": "USD Coin",
"chainId": 8453,
"version": "2",
"verifyingContract": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913"
},
"network_name": "Base Mainnet",
"assetTransferMethod": "eip3009"
},
"payTo": "0x2880EdfFF13100677Bf97A3CBdF3Bc34771C4E5E",
"amount": "8000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
}
]Extensions
{
"bazaar": {
"info": {
"input": {
"body": {
"underlying": "BTC"
},
"type": "http",
"method": "POST",
"bodyType": "json"
}
},
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"input"
],
"properties": {
"input": {
"type": "object",
"required": [
"type",
"method",
"bodyType",
"body"
],
"properties": {
"body": {
"type": "object",
"required": [
"underlying"
],
"properties": {
"expiry": {
"type": "string",
"default": "naechste",
"description": "naechste for the nearest expiry, an exact date as YYYY-MM-DD, or alle for every open expiry."
},
"underlying": {
"enum": [
"BTC",
"ETH",
"btc",
"eth"
],
"type": "string",
"description": "Underlying. Deribit lists crypto options for BTC and ETH."
},
"moneyness_range": {
"type": "number",
"default": 0.3,
"maximum": 1,
"minimum": 0.1,
"description": "How far strikes may sit from the forward to be listed, as a fraction. 0.3 means plus or minus 30 percent."
}
},
"additionalProperties": false
},
"type": {
"type": "string",
"const": "http"
},
"method": {
"enum": [
"POST",
"PUT",
"PATCH"
],
"type": "string"
},
"bodyType": {
"enum": [
"json",
"form-data",
"text"
],
"type": "string"
}
},
"additionalProperties": false
}
}
}
}
}Provenance
- Seen in the source catalog
- 2026-08-09 18:19Z
- Last indexed by Roundhouse
- 2026-09-08 18:00Z
- Last enriched (probe, favicon, geo)
- 2026-09-20 19:15Z
- x402 version
- 2
- Max timeout
- 300s
- Liveness probe
- HTTP 402
Hand this page to an agent
Copy the prompt and paste it into Claude, an MCP client or your own agent — it will vet this service and call it over the free read API. No key, no account.
GET api.roundhouseai.io/v0/endpoints
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 16 snapshots so far. Verified volume counts only settlements with an on-chain EIP-3009 marker.
Show the promptHide the prompt
Using Roundhouse, look up the x402 service HALOWERK marktwerk and tell me whether it is worth paying: what a call costs, whether the endpoint answered when last probed, and what its payment record actually shows. curl -s 'https://api.roundhouseai.io/v0/endpoints?q=HALOWERK%20marktwerk' curl -s 'https://api.roundhouseai.io/v0/merchants/<the payTo wallet returned above>' Then call it: read the price from the live 402 at https://markt.halowerk.com/options, never from a cached figure, and pay with an x402 client. The /v0 API needs an API key (`authorization: Bearer rh_live_…`) on everything except /v0/unified* and /v0/endpoints. Mint a personal key for $0.01 at GET https://api.roundhouseai.io/v0/test/x402, or use an organization key from https://roundhouseai.io/dashboard/team. If you do not have Roundhouse tools or skills installed, read https://roundhouseai.io/skill.md first — it is the whole procedure.