HALOWERK marktwerk
HALOWERK provides paid endpoints that AI agents call and pay for per request via x402 on Base. No account, no API key, no signup.
MediaLiveeip155:8453Exactvia cdp
Calls · 30d
1→ 0%
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 17 snapshots so far.
$11.48
Verified settled volume
2,658 settlements proven x402 by their on-chain EIP-3009 marker.
$0.0030
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 2026-08-12 04:28Z
—
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": "evm_gas_conditions",
"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": "3000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
}
],
"pricing": "https://markt.halowerk.com/pricing",
"summary": "Gas conditions on Ethereum and Base: base fee, priority fee at three percentiles, a recommended bid, the cost of a concrete action in US dollars including the L1 data fee on Base, the direction over the last blocks and a cheap/normal/expensive verdict with its thresholds named.",
"resource": {
"url": "https://markt.halowerk.com/gas",
"iconUrl": "https://markt.halowerk.com/favicon.svg",
"mimeType": "application/json",
"description": "Reads eth_feeHistory over the last ten blocks with reward percentiles 25, 50 and 75, and falls back to eth_gasPrice when a node does not serve fee history. base_fee_gwei is the base fee of the next block, not of the last one, because that is the fee a transaction sent now will actually pay. recommended_gwei is a bid, not an observation: priority at the median plus a base fee doubled to survive several full blocks, and the rule is stated in recommended_rule. cost_usd converts that into dollars fo",
"serviceName": "HALOWERK marktwerk"
},
"extensions": {
"bazaar": {
"info": {
"input": {
"body": {
"chain": "base",
"action": "erc20"
},
"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",
"properties": {
"chain": {
"enum": [
"ethereum",
"base"
],
"type": "string",
"default": "ethereum",
"description": "Chain to measure. ethereum or base."
},
"action": {
"enum": [
"transfer",
"erc20",
"swap"
],
"type": "string",
"default": "transfer",
"description": "Which transaction the cost estimate is for: transfer, erc20 or swap."
}
},
"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": "0.003",
"description": "Reads eth_feeHistory over the last ten blocks with reward percentiles 25, 50 and 75, and falls back to eth_gasPrice when a node does not serve fee history. base_fee_gwei is the base fee of the next block, not of the last one, because that is the fee a transaction sent now will actually pay. recommended_gwei is a bid, not an observation: priority at the median plus a base fee doubled to survive several full blocks, and the rule is stated in recommended_rule. cost_usd converts that into dollars for the requested action over typical gas units, named in gas_units_used and explicitly not a measurement of the caller transaction. On Base the L1 data fee is read from the GasPriceOracle predeploy of the chain itself and reported separately in cost_breakdown_usd: a Base figure that omits it understates what leaves the wallet. trend compares the older half of the window against the newer half, and worth_waiting combines that direction with the position of the current base fee inside the window, so the answer is not just what gas costs but whether waiting is likely to help. Thresholds for the cheap, normal and expensive signal differ per chain and travel with every response. No key, no vendor feed: the numbers come from public RPC nodes of the chain plus one dollar quote for ether.",
"inputSchema": {
"type": "object",
"properties": {
"chain": {
"enum": [
"ethereum",
"base"
],
"type": "string",
"default": "ethereum",
"description": "Chain to measure. ethereum or base."
},
"action": {
"enum": [
"transfer",
"erc20",
"swap"
],
"type": "string",
"default": "transfer",
"description": "Which transaction the cost estimate is for: transfer, erc20 or swap."
}
},
"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": {
"note": {
"type": "string"
},
"chain": {
"type": "string"
},
"stale": {
"type": "boolean"
},
"trend": {
"type": [
"object",
"null"
]
},
"action": {
"type": "string"
},
"signal": {
"type": [
"string",
"null"
]
},
"source": {
"type": "array"
},
"cost_usd": {
"type": [
"number",
"null"
]
},
"priority_p25": {
"type": [
"number",
"null"
]
},
"priority_p50": {
"type": [
"number",
"null"
]
},
"priority_p75": {
"type": [
"number",
"null"
]
},
"base_fee_gwei": {
"type": [
"number",
"null"
]
},
"worth_waiting": {
"type": [
"object",
"null"
]
},
"fetched_at_iso": {
"type": "string"
},
"stale_as_of_iso": {
"type": [
"string",
"null"
]
},
"thresholds_used": {
"type": "object"
},
"recommended_gwei": {
"type": [
"number",
"null"
]
},
"cost_breakdown_usd": {
"type": [
"object",
"null"
]
}
}
},
"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.
0.003USDC≈ $0.003 USD
on Base · exact scheme
Pay 0.003 USDC on Base to 0x2880…C4E5E. The signed payment is good for 5 minutes.
- Paid to
- 0x2880…C4E5E
- USD Coin contract
- 0x8335…02913
- Payment window
- 5 minutes
- As published
- 3000 smallest units
The catalog’s raw entry
[
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"asset": "USDC",
"version": "2",
"eip712Domain": {
"name": "USD Coin",
"chainId": 8453,
"version": "2",
"verifyingContract": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913"
},
"network_name": "Base Mainnet",
"assetTransferMethod": "eip3009"
},
"payTo": "0x2880EdfFF13100677Bf97A3CBdF3Bc34771C4E5E",
"amount": "3000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
}
]Extensions
{
"bazaar": {
"info": {
"input": {
"body": {
"chain": "base",
"action": "erc20"
},
"type": "http",
"method": "POST",
"bodyType": "json"
}
},
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"input"
],
"properties": {
"input": {
"type": "object",
"required": [
"type",
"method",
"bodyType",
"body"
],
"properties": {
"body": {
"type": "object",
"properties": {
"chain": {
"enum": [
"ethereum",
"base"
],
"type": "string",
"default": "ethereum",
"description": "Chain to measure. ethereum or base."
},
"action": {
"enum": [
"transfer",
"erc20",
"swap"
],
"type": "string",
"default": "transfer",
"description": "Which transaction the cost estimate is for: transfer, erc20 or swap."
}
},
"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
- 2026-08-12 04:28Z
- Last indexed by Roundhouse
- 2026-09-11 04:30Z
- Last enriched (probe, favicon, geo)
- 2026-09-21 07:45Z
- 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. 17 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/gas, 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.