modell.halowerk.com
Takes the steps of one agent run and returns a scored report. It counts identical tool calls (same tool, same arguments) as loops, finds the longest run of consecutive failures, marks calls whose result was empty or null as wasted, and attributes cost per step and per tool so the expensive part is visible. Cost is taken from your figures when supplied, otherwise computed from token counts against the model price table.
InferenceLiveeip155:8453Exactvia 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.
$0.0020
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 2026-08-11 09:59Z
—
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://modell.halowerk.com/llms.txt",
"name": "trace_grade",
"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": "2000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
}
],
"pricing": "https://modell.halowerk.com/pricing",
"resource": {
"url": "https://modell.halowerk.com/v1/trace-grade",
"mimeType": "application/json",
"description": "Takes the steps of one agent run and returns a scored report. It counts identical tool calls (same tool, same arguments) as loops, finds the longest run of consecutive failures, marks calls whose result was empty or null as wasted, and attributes cost per step and per tool so the expensive part is visible. Cost is taken from your figures when supplied, otherwise computed from token counts against the model price table."
},
"extensions": {
"bazaar": {
"info": {
"input": {
"body": {
"steps": [
{
"ok": true,
"tool": "beispiel",
"arguments": "beispiel"
}
]
},
"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": [
"steps"
],
"properties": {
"model": {
"type": "string",
"description": "Model id used, to price token counts when cost_usd is absent."
},
"steps": {
"type": "array",
"items": {
"type": "object",
"properties": {
"ok": {
"type": "boolean",
"description": "Whether the step succeeded. Defaults to true unless error is set."
},
"tool": {
"type": "string",
"description": "Name of the tool or step."
},
"error": {
"type": "string",
"description": "Error text, if it failed."
},
"result": {
"description": "The result. Empty, null or an empty list counts as a wasted call."
},
"cost_usd": {
"type": "number",
"minimum": 0,
"description": "Cost of this step, if you already know it."
},
"arguments": {
"description": "The arguments used. Identical arguments on the same tool count as a loop."
},
"duration_ms": {
"type": "integer",
"minimum": 0
},
"input_tokens": {
"type": "integer",
"minimum": 0
},
"output_tokens": {
"type": "integer",
"minimum": 0
}
},
"additionalProperties": true
},
"maxItems": 1000,
"minItems": 1,
"description": "The steps of the run, in order."
},
"loop_threshold": {
"type": "integer",
"default": 2,
"minimum": 2,
"description": "From how many identical calls on it counts as a loop."
}
},
"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": "0.002",
"description": "Takes the steps of one agent run and returns a scored report. It counts identical tool calls (same tool, same arguments) as loops, finds the longest run of consecutive failures, marks calls whose result was empty or null as wasted, and attributes cost per step and per tool so the expensive part is visible. Cost is taken from your figures when supplied, otherwise computed from token counts against the model price table. A grade from A to F is derived from four measurable ratios — loops, errors, empty results and cost concentration — and every ratio is returned with the threshold it was judged against, so the grade can be recomputed or disagreed with. It judges shape and spend only: a run can be efficient and still produce the wrong answer, and nothing here checks the answer.",
"inputSchema": {
"type": "object",
"required": [
"steps"
],
"properties": {
"model": {
"type": "string",
"description": "Model id used, to price token counts when cost_usd is absent."
},
"steps": {
"type": "array",
"items": {
"type": "object",
"properties": {
"ok": {
"type": "boolean",
"description": "Whether the step succeeded. Defaults to true unless error is set."
},
"tool": {
"type": "string",
"description": "Name of the tool or step."
},
"error": {
"type": "string",
"description": "Error text, if it failed."
},
"result": {
"description": "The result. Empty, null or an empty list counts as a wasted call."
},
"cost_usd": {
"type": "number",
"minimum": 0,
"description": "Cost of this step, if you already know it."
},
"arguments": {
"description": "The arguments used. Identical arguments on the same tool count as a loop."
},
"duration_ms": {
"type": "integer",
"minimum": 0
},
"input_tokens": {
"type": "integer",
"minimum": 0
},
"output_tokens": {
"type": "integer",
"minimum": 0
}
},
"additionalProperties": true
},
"maxItems": 1000,
"minItems": 1,
"description": "The steps of the run, in order."
},
"loop_threshold": {
"type": "integer",
"default": 2,
"minimum": 2,
"description": "From how many identical calls on it counts as a loop."
}
},
"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.",
"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.
0.002USDC≈ $0.002 USD
on Base · exact scheme
Pay 0.002 USDC on Base to 0x2880…C4E5E. The signed payment is good for 5 minutes.
- Paid to
- 0x2880…C4E5E
- USD Coin contract
- 0x8335…02913
- Payment window
- 5 minutes
- As published
- 2000 smallest units
The catalog’s raw entry
[
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"asset": "USDC",
"version": "2",
"eip712Domain": {
"name": "USD Coin",
"chainId": 8453,
"version": "2",
"verifyingContract": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913"
},
"network_name": "Base Mainnet",
"assetTransferMethod": "eip3009"
},
"payTo": "0x2880EdfFF13100677Bf97A3CBdF3Bc34771C4E5E",
"amount": "2000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
}
]Extensions
{
"bazaar": {
"info": {
"input": {
"body": {
"steps": [
{
"ok": true,
"tool": "beispiel",
"arguments": "beispiel"
}
]
},
"type": "http",
"method": "POST",
"bodyType": "json"
}
},
"schema": {
"type": "object",
"$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": [
"steps"
],
"properties": {
"model": {
"type": "string",
"description": "Model id used, to price token counts when cost_usd is absent."
},
"steps": {
"type": "array",
"items": {
"type": "object",
"properties": {
"ok": {
"type": "boolean",
"description": "Whether the step succeeded. Defaults to true unless error is set."
},
"tool": {
"type": "string",
"description": "Name of the tool or step."
},
"error": {
"type": "string",
"description": "Error text, if it failed."
},
"result": {
"description": "The result. Empty, null or an empty list counts as a wasted call."
},
"cost_usd": {
"type": "number",
"minimum": 0,
"description": "Cost of this step, if you already know it."
},
"arguments": {
"description": "The arguments used. Identical arguments on the same tool count as a loop."
},
"duration_ms": {
"type": "integer",
"minimum": 0
},
"input_tokens": {
"type": "integer",
"minimum": 0
},
"output_tokens": {
"type": "integer",
"minimum": 0
}
},
"additionalProperties": true
},
"maxItems": 1000,
"minItems": 1,
"description": "The steps of the run, in order."
},
"loop_threshold": {
"type": "integer",
"default": 2,
"minimum": 2,
"description": "From how many identical calls on it counts as a loop."
}
},
"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
- 2026-08-11 09:59Z
- Last indexed by Roundhouse
- 2026-09-10 10:00Z
- Last enriched (probe, favicon, geo)
- 2026-09-24 11:45Z
- 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 modell.halowerk.com 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=modell.halowerk.com' 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://modell.halowerk.com/v1/trace-grade, 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.