handel.halowerk.com
HALOWERK provides paid endpoints that AI agents call and pay for per request via x402 on Base. No account, no API key, no signup.
InfraLiveeip155:8453Exactvia cdp
Calls · 30d
3↑ 82%
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 29 snapshots so far.
$11.48
Verified settled volume
2,657 settlements proven x402 by their on-chain EIP-3009 marker.
$0.0050
Listed price
As published in the catalog. Always read the live 402 before paying.
3
Calls · 30d
Upstream's own call count for this endpoint, not ours.
2
Unique payers · 30d
Last called 2026-09-19 15:55Z
—
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://handel.halowerk.com/llms.txt",
"name": "slotting_plan",
"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": "5000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
}
],
"pricing": "https://handel.halowerk.com/pricing",
"resource": {
"url": "https://handel.halowerk.com/v1/slotting-plan",
"mimeType": "application/json",
"description": "Takes a warehouse as a table and returns a placement. You supply the storage locations with their walking distance to the pick-and-drop point and, where they exist, their weight and volume limits; you supply the SKUs with pick frequency, weight and volume; and you may supply the joint-pick pairs."
},
"extensions": {
"bazaar": {
"info": {
"input": {
"body": {
"skus": [
{
"sku": "A-100",
"volume_l": 8,
"weight_kg": 2.5,
"picks_per_period": 420,
"current_location_id": "L-07"
},
{
"sku": "A-101",
"volume_l": 5,
"weight_kg": 1.2,
"picks_per_period": 380,
"current_location_id": "L-01"
},
{
"sku": "B-200",
"volume_l": 40,
"weight_kg": 18,
"picks_per_period": 95,
"current_location_id": "L-03"
},
{
"sku": "C-300",
"volume_l": 2,
"weight_kg": 0.4,
"picks_per_period": 12,
"current_location_id": "L-02"
}
],
"locations": [
{
"zone": "front",
"location_id": "L-01",
"max_volume_l": 60,
"max_weight_kg": 25,
"travel_distance_m": 6
},
{
"zone": "front",
"location_id": "L-02",
"max_volume_l": 60,
"max_weight_kg": 25,
"travel_distance_m": 9
},
{
"zone": "middle",
"location_id": "L-03",
"max_volume_l": 120,
"max_weight_kg": 40,
"travel_distance_m": 22
},
{
"zone": "back",
"location_id": "L-07",
"max_volume_l": 120,
"max_weight_kg": 40,
"travel_distance_m": 48
}
],
"affinities": [
{
"sku_a": "A-100",
"sku_b": "A-101",
"joint_picks_per_period": 210
}
],
"return_trip": true,
"abc_share_pct": [
80,
95
]
},
"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": [
"skus",
"locations"
],
"properties": {
"skus": {
"type": "array",
"items": {
"type": "object",
"required": [
"sku",
"picks_per_period"
],
"properties": {
"sku": {
"type": "string",
"maxLength": 64,
"minLength": 1,
"description": "Your SKU identifier. Must be unique within the request."
},
"volume_l": {
"type": "number",
"maximum": 100000,
"minimum": 0,
"description": "Volume of one storage unit in litres. Checked against max_volume_l of the location."
},
"weight_kg": {
"type": "number",
"maximum": 100000,
"minimum": 0,
"description": "Weight of one storage unit in kilograms. Checked against max_weight_kg of the location."
},
"picks_per_period": {
"type": "number",
"maximum": 1000000,
"minimum": 0,
"description": "Number of picks in the period you are planning for. The period itself is yours; it only has to be the same for every SKU."
},
"current_location_id": {
"type": "string",
"maxLength": 64,
"description": "Where the SKU sits today. Only used for the before-and-after comparison."
}
},
"additionalProperties": false
},
"maxItems": 2000,
"minItems": 1,
"description": "The SKUs to place."
},
"locations": {
"type": "array",
"items": {
"type": "object",
"required": [
"location_id",
"travel_distance_m"
],
"properties": {
"zone": {
"type": "string",
"maxLength": 64,
"description": "Free-text zone label, passed through unchanged."
},
"location_id": {
"type": "string",
"maxLength": 64,
"minLength": 1,
"description": "Your location identifier. Must be unique within the request."
},
"max_volume_l": {
"type": "number",
"maximum": 100000,
"minimum": 0,
"description": "Volume limit of this location in litres. Omitted means no limit."
},
"max_weight_kg": {
"type": "number",
"maximum": 100000,
"minimum": 0,
"description": "Weight limit of this location in kilograms. Omitted means no limit."
},
"travel_distance_m": {
"type": "number",
"maximum": 100000,
"minimum": 0,
"description": "One-way walking distance in metres from the pick-and-drop point to this location."
}
},
"additionalProperties": false
},
"maxItems": 5000,
"minItems": 1,
"description": "The storage locations available for the plan."
},
"affinities": {
"type": "array",
"items": {
"type": "object",
"required": [
"sku_a",
"sku_b",
"joint_picks_per_period"
],
"properties": {
"sku_a": {
"type": "string",
"maxLength": 64,
"minLength": 1
},
"sku_b": {
"type": "string",
"maxLength": 64,
"minLength": 1
},
"joint_picks_per_period": {
"type": "number",
"maximum": 1000000,
"minimum": 0,
"description": "How often the two are picked in the same order, in the same period as picks_per_period."
}
},
"additionalProperties": false
},
"maxItems": 5000,
"description": "Pairs of SKUs that are picked together. Used to slot them near each other."
},
"return_trip": {
"type": "boolean",
"default": true,
"description": "Whether the picker walks back the same way. True doubles every distance."
},
"abc_share_pct": {
"type": "array",
"items": {
"type": "number",
"maximum": 100,
"minimum": 0
},
"default": [
80,
95
],
"maxItems": 2,
"minItems": 2,
"description": "Cumulative pick share in percent that ends class A and class B. First value must be smaller than the second."
}
},
"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": "0.005",
"description": "Takes a warehouse as a table and returns a placement. You supply the storage locations with their walking distance to the pick-and-drop point and, where they exist, their weight and volume limits; you supply the SKUs with pick frequency, weight and volume; and you may supply the joint-pick pairs. The endpoint classifies the SKUs into A, B and C by cumulative pick share, groups the SKUs that are picked together into affinity clusters so that they are slotted next to each other, and then assigns clusters to the shortest free locations in descending order of pick frequency, skipping any location whose weight or volume limit the SKU would break. The travel distance is arithmetic, not an estimate: pick frequency times slot distance, doubled when the picker returns, summed over all SKUs. Where every SKU carries a current_location_id the same sum is computed for the existing layout and reported as the saving, so the plan can be judged rather than believed. The assignment heuristic is fixed and every ordering is decided by the input alone, so the same request always yields the same plan; it is a good placement, not a proven optimum, because the full problem is a quadratic assignment problem. This endpoint does not know your aisles: the distance per location is what you pass in, it is never derived from a floor plan, and nothing is stored between calls.",
"inputSchema": {
"type": "object",
"required": [
"skus",
"locations"
],
"properties": {
"skus": {
"type": "array",
"items": {
"type": "object",
"required": [
"sku",
"picks_per_period"
],
"properties": {
"sku": {
"type": "string",
"maxLength": 64,
"minLength": 1,
"description": "Your SKU identifier. Must be unique within the request."
},
"volume_l": {
"type": "number",
"maximum": 100000,
"minimum": 0,
"description": "Volume of one storage unit in litres. Checked against max_volume_l of the location."
},
"weight_kg": {
"type": "number",
"maximum": 100000,
"minimum": 0,
"description": "Weight of one storage unit in kilograms. Checked against max_weight_kg of the location."
},
"picks_per_period": {
"type": "number",
"maximum": 1000000,
"minimum": 0,
"description": "Number of picks in the period you are planning for. The period itself is yours; it only has to be the same for every SKU."
},
"current_location_id": {
"type": "string",
"maxLength": 64,
"description": "Where the SKU sits today. Only used for the before-and-after comparison."
}
},
"additionalProperties": false
},
"maxItems": 2000,
"minItems": 1,
"description": "The SKUs to place."
},
"locations": {
"type": "array",
"items": {
"type": "object",
"required": [
"location_id",
"travel_distance_m"
],
"properties": {
"zone": {
"type": "string",
"maxLength": 64,
"description": "Free-text zone label, passed through unchanged."
},
"location_id": {
"type": "string",
"maxLength": 64,
"minLength": 1,
"description": "Your location identifier. Must be unique within the request."
},
"max_volume_l": {
"type": "number",
"maximum": 100000,
"minimum": 0,
"description": "Volume limit of this location in litres. Omitted means no limit."
},
"max_weight_kg": {
"type": "number",
"maximum": 100000,
"minimum": 0,
"description": "Weight limit of this location in kilograms. Omitted means no limit."
},
"travel_distance_m": {
"type": "number",
"maximum": 100000,
"minimum": 0,
"description": "One-way walking distance in metres from the pick-and-drop point to this location."
}
},
"additionalProperties": false
},
"maxItems": 5000,
"minItems": 1,
"description": "The storage locations available for the plan."
},
"affinities": {
"type": "array",
"items": {
"type": "object",
"required": [
"sku_a",
"sku_b",
"joint_picks_per_period"
],
"properties": {
"sku_a": {
"type": "string",
"maxLength": 64,
"minLength": 1
},
"sku_b": {
"type": "string",
"maxLength": 64,
"minLength": 1
},
"joint_picks_per_period": {
"type": "number",
"maximum": 1000000,
"minimum": 0,
"description": "How often the two are picked in the same order, in the same period as picks_per_period."
}
},
"additionalProperties": false
},
"maxItems": 5000,
"description": "Pairs of SKUs that are picked together. Used to slot them near each other."
},
"return_trip": {
"type": "boolean",
"default": true,
"description": "Whether the picker walks back the same way. True doubles every distance."
},
"abc_share_pct": {
"type": "array",
"items": {
"type": "number",
"maximum": 100,
"minimum": 0
},
"default": [
80,
95
],
"maxItems": 2,
"minItems": 2,
"description": "Cumulative pick share in percent that ends class A and class B. First value must be smaller than the second."
}
},
"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.
0.005USDC≈ $0.005 USD
on Base · exact scheme
Pay 0.005 USDC on Base to 0x2880…C4E5E. The signed payment is good for 5 minutes.
- Paid to
- 0x2880…C4E5E
- USD Coin contract
- 0x8335…02913
- Payment window
- 5 minutes
- As published
- 5000 smallest units
The catalog’s raw entry
[
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"asset": "USDC",
"version": "2",
"eip712Domain": {
"name": "USD Coin",
"chainId": 8453,
"version": "2",
"verifyingContract": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913"
},
"network_name": "Base Mainnet",
"assetTransferMethod": "eip3009"
},
"payTo": "0x2880EdfFF13100677Bf97A3CBdF3Bc34771C4E5E",
"amount": "5000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
}
]Extensions
{
"bazaar": {
"info": {
"input": {
"body": {
"skus": [
{
"sku": "A-100",
"volume_l": 8,
"weight_kg": 2.5,
"picks_per_period": 420,
"current_location_id": "L-07"
},
{
"sku": "A-101",
"volume_l": 5,
"weight_kg": 1.2,
"picks_per_period": 380,
"current_location_id": "L-01"
},
{
"sku": "B-200",
"volume_l": 40,
"weight_kg": 18,
"picks_per_period": 95,
"current_location_id": "L-03"
},
{
"sku": "C-300",
"volume_l": 2,
"weight_kg": 0.4,
"picks_per_period": 12,
"current_location_id": "L-02"
}
],
"locations": [
{
"zone": "front",
"location_id": "L-01",
"max_volume_l": 60,
"max_weight_kg": 25,
"travel_distance_m": 6
},
{
"zone": "front",
"location_id": "L-02",
"max_volume_l": 60,
"max_weight_kg": 25,
"travel_distance_m": 9
},
{
"zone": "middle",
"location_id": "L-03",
"max_volume_l": 120,
"max_weight_kg": 40,
"travel_distance_m": 22
},
{
"zone": "back",
"location_id": "L-07",
"max_volume_l": 120,
"max_weight_kg": 40,
"travel_distance_m": 48
}
],
"affinities": [
{
"sku_a": "A-100",
"sku_b": "A-101",
"joint_picks_per_period": 210
}
],
"return_trip": true,
"abc_share_pct": [
80,
95
]
},
"type": "http",
"method": "POST",
"bodyType": "json"
}
},
"schema": {
"type": "object",
"$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": [
"skus",
"locations"
],
"properties": {
"skus": {
"type": "array",
"items": {
"type": "object",
"required": [
"sku",
"picks_per_period"
],
"properties": {
"sku": {
"type": "string",
"maxLength": 64,
"minLength": 1,
"description": "Your SKU identifier. Must be unique within the request."
},
"volume_l": {
"type": "number",
"maximum": 100000,
"minimum": 0,
"description": "Volume of one storage unit in litres. Checked against max_volume_l of the location."
},
"weight_kg": {
"type": "number",
"maximum": 100000,
"minimum": 0,
"description": "Weight of one storage unit in kilograms. Checked against max_weight_kg of the location."
},
"picks_per_period": {
"type": "number",
"maximum": 1000000,
"minimum": 0,
"description": "Number of picks in the period you are planning for. The period itself is yours; it only has to be the same for every SKU."
},
"current_location_id": {
"type": "string",
"maxLength": 64,
"description": "Where the SKU sits today. Only used for the before-and-after comparison."
}
},
"additionalProperties": false
},
"maxItems": 2000,
"minItems": 1,
"description": "The SKUs to place."
},
"locations": {
"type": "array",
"items": {
"type": "object",
"required": [
"location_id",
"travel_distance_m"
],
"properties": {
"zone": {
"type": "string",
"maxLength": 64,
"description": "Free-text zone label, passed through unchanged."
},
"location_id": {
"type": "string",
"maxLength": 64,
"minLength": 1,
"description": "Your location identifier. Must be unique within the request."
},
"max_volume_l": {
"type": "number",
"maximum": 100000,
"minimum": 0,
"description": "Volume limit of this location in litres. Omitted means no limit."
},
"max_weight_kg": {
"type": "number",
"maximum": 100000,
"minimum": 0,
"description": "Weight limit of this location in kilograms. Omitted means no limit."
},
"travel_distance_m": {
"type": "number",
"maximum": 100000,
"minimum": 0,
"description": "One-way walking distance in metres from the pick-and-drop point to this location."
}
},
"additionalProperties": false
},
"maxItems": 5000,
"minItems": 1,
"description": "The storage locations available for the plan."
},
"affinities": {
"type": "array",
"items": {
"type": "object",
"required": [
"sku_a",
"sku_b",
"joint_picks_per_period"
],
"properties": {
"sku_a": {
"type": "string",
"maxLength": 64,
"minLength": 1
},
"sku_b": {
"type": "string",
"maxLength": 64,
"minLength": 1
},
"joint_picks_per_period": {
"type": "number",
"maximum": 1000000,
"minimum": 0,
"description": "How often the two are picked in the same order, in the same period as picks_per_period."
}
},
"additionalProperties": false
},
"maxItems": 5000,
"description": "Pairs of SKUs that are picked together. Used to slot them near each other."
},
"return_trip": {
"type": "boolean",
"default": true,
"description": "Whether the picker walks back the same way. True doubles every distance."
},
"abc_share_pct": {
"type": "array",
"items": {
"type": "number",
"maximum": 100,
"minimum": 0
},
"default": [
80,
95
],
"maxItems": 2,
"minItems": 2,
"description": "Cumulative pick share in percent that ends class A and class B. First value must be smaller than the second."
}
},
"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
- 2026-09-19 15:55Z
- Last indexed by Roundhouse
- 2026-09-25 00:00Z
- Last enriched (probe, favicon, geo)
- 2026-09-23 17:15Z
- 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. 29 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 handel.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=handel.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://handel.halowerk.com/v1/slotting-plan, 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.