agent.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.
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. 25 snapshots so far.
$11.50
Verified settled volume
2,673 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.
1
Calls · 30d
Upstream's own call count for this endpoint, not ours.
1
Unique payers · 30d
Last called 2026-08-19 15:04Z
—
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://agent.halowerk.com/llms.txt",
"name": "intent_clarify",
"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://agent.halowerk.com/pricing",
"resource": {
"url": "https://agent.halowerk.com/v1/intent-clarify",
"mimeType": "application/json",
"description": "Takes a list of candidate intents, each described by attributes, plus whatever is already known, and returns the one attribute worth asking about next. Candidates contradicted by the known values are ruled out first and listed with the attribute that excluded them; a candidate that simply does not declare a known attribute is kept, because silence is not a contradiction."
},
"extensions": {
"bazaar": {
"info": {
"input": {
"body": {
"known": {
"urgency": "high"
},
"candidates": [
{
"id": "book_flight",
"label": "Book a flight",
"prior": 3,
"attributes": {
"action": "book",
"object": "travel",
"urgency": "high"
}
},
{
"id": "book_hotel",
"label": "Book a hotel room",
"prior": 2,
"attributes": {
"action": "book",
"object": "lodging",
"urgency": "high"
}
},
{
"id": "cancel_flight",
"label": "Cancel a flight",
"prior": 1,
"attributes": {
"action": "cancel",
"object": "travel",
"urgency": "high"
}
},
{
"id": "flight_status",
"label": "Check flight status",
"prior": 4,
"attributes": {
"action": "inspect",
"object": "travel",
"urgency": "low"
}
}
],
"max_options": 5,
"attribute_prompts": {
"action": "What would you like to do?"
}
},
"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": [
"candidates"
],
"properties": {
"known": {
"type": "object",
"description": "Attribute values already established, for example from earlier answers.",
"additionalProperties": {
"type": [
"string",
"number",
"boolean",
"null"
]
}
},
"ask_about": {
"type": "array",
"items": {
"type": "string",
"maxLength": 128,
"minLength": 1
},
"maxItems": 50,
"description": "Restrict the question to these attributes. Empty or absent means all of them."
},
"candidates": {
"type": "array",
"items": {
"type": "object",
"required": [
"id",
"attributes"
],
"properties": {
"id": {
"type": "string",
"maxLength": 128,
"minLength": 1,
"description": "Identifier, unique within the call."
},
"label": {
"type": "string",
"maxLength": 300,
"description": "Optional human-readable name, echoed unchanged."
},
"prior": {
"type": "number",
"default": 1,
"maximum": 1000,
"minimum": 0,
"description": "Relative likelihood of this candidate before asking. Used to weight the expected outcome."
},
"attributes": {
"type": "object",
"description": "What distinguishes this candidate. Values must be scalar.",
"additionalProperties": {
"type": [
"string",
"number",
"boolean",
"null"
]
}
}
},
"additionalProperties": false
},
"maxItems": 50,
"minItems": 2,
"description": "The competing intents, two to fifty."
},
"max_options": {
"type": "integer",
"default": 5,
"maximum": 10,
"minimum": 2,
"description": "How many answer options the question may offer. Excess values are named under omitted_values, never dropped silently."
},
"attribute_prompts": {
"type": "object",
"description": "Your own question wording per attribute. Used verbatim where given.",
"additionalProperties": {
"type": "string",
"maxLength": 300
}
}
},
"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 list of candidate intents, each described by attributes, plus whatever is already known, and returns the one attribute worth asking about next. Candidates contradicted by the known values are ruled out first and listed with the attribute that excluded them; a candidate that simply does not declare a known attribute is kept, because silence is not a contradiction. For every remaining attribute the endpoint builds the branches an answer would create and ranks them by the prior-weighted expected number of candidates left, then by the worst case, then by the number of options; a candidate that does not declare the attribute survives every branch, which is counted rather than ignored. Attributes on which all remaining candidates agree carry no information and are returned separately as unusable_attributes, so they are not asked by mistake. When an attribute has more distinct values than max_options, the largest options are shown and the omitted values are named explicitly — nothing is capped silently. The answer also carries a greedy worst-case estimate of how many further questions would be needed. This endpoint uses no language model and does not read natural language: it never invents a candidate, an attribute or a value, and the question wording is a fixed template over the attribute name unless you supply your own phrasing in attribute_prompts. It is stateless — it remembers no dialogue, so pass the accumulated answers back in known on the next call.",
"inputSchema": {
"type": "object",
"required": [
"candidates"
],
"properties": {
"known": {
"type": "object",
"description": "Attribute values already established, for example from earlier answers.",
"additionalProperties": {
"type": [
"string",
"number",
"boolean",
"null"
]
}
},
"ask_about": {
"type": "array",
"items": {
"type": "string",
"maxLength": 128,
"minLength": 1
},
"maxItems": 50,
"description": "Restrict the question to these attributes. Empty or absent means all of them."
},
"candidates": {
"type": "array",
"items": {
"type": "object",
"required": [
"id",
"attributes"
],
"properties": {
"id": {
"type": "string",
"maxLength": 128,
"minLength": 1,
"description": "Identifier, unique within the call."
},
"label": {
"type": "string",
"maxLength": 300,
"description": "Optional human-readable name, echoed unchanged."
},
"prior": {
"type": "number",
"default": 1,
"maximum": 1000,
"minimum": 0,
"description": "Relative likelihood of this candidate before asking. Used to weight the expected outcome."
},
"attributes": {
"type": "object",
"description": "What distinguishes this candidate. Values must be scalar.",
"additionalProperties": {
"type": [
"string",
"number",
"boolean",
"null"
]
}
}
},
"additionalProperties": false
},
"maxItems": 50,
"minItems": 2,
"description": "The competing intents, two to fifty."
},
"max_options": {
"type": "integer",
"default": 5,
"maximum": 10,
"minimum": 2,
"description": "How many answer options the question may offer. Excess values are named under omitted_values, never dropped silently."
},
"attribute_prompts": {
"type": "object",
"description": "Your own question wording per attribute. Used verbatim where given.",
"additionalProperties": {
"type": "string",
"maxLength": 300
}
}
},
"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≈ $0.005 USD
on Base · exact scheme
Pay 0.005 USDC on Base to 0x2880…C4E5E. The signed payment is good for 5 minutes.
- Paid to
- 0x2880…C4E5E
- USD Coin contract
- 0x8335…02913
- Payment window
- 5 minutes
- As published
- 5000 smallest units
The catalog’s raw entry
[
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"asset": "USDC",
"version": "2",
"eip712Domain": {
"name": "USD Coin",
"chainId": 8453,
"version": "2",
"verifyingContract": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913"
},
"network_name": "Base Mainnet",
"assetTransferMethod": "eip3009"
},
"payTo": "0x2880EdfFF13100677Bf97A3CBdF3Bc34771C4E5E",
"amount": "5000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
}
]Extensions
{
"bazaar": {
"info": {
"input": {
"body": {
"known": {
"urgency": "high"
},
"candidates": [
{
"id": "book_flight",
"label": "Book a flight",
"prior": 3,
"attributes": {
"action": "book",
"object": "travel",
"urgency": "high"
}
},
{
"id": "book_hotel",
"label": "Book a hotel room",
"prior": 2,
"attributes": {
"action": "book",
"object": "lodging",
"urgency": "high"
}
},
{
"id": "cancel_flight",
"label": "Cancel a flight",
"prior": 1,
"attributes": {
"action": "cancel",
"object": "travel",
"urgency": "high"
}
},
{
"id": "flight_status",
"label": "Check flight status",
"prior": 4,
"attributes": {
"action": "inspect",
"object": "travel",
"urgency": "low"
}
}
],
"max_options": 5,
"attribute_prompts": {
"action": "What would you like to do?"
}
},
"type": "http",
"method": "POST",
"bodyType": "json"
}
},
"schema": {
"type": "object",
"$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": [
"candidates"
],
"properties": {
"known": {
"type": "object",
"description": "Attribute values already established, for example from earlier answers.",
"additionalProperties": {
"type": [
"string",
"number",
"boolean",
"null"
]
}
},
"ask_about": {
"type": "array",
"items": {
"type": "string",
"maxLength": 128,
"minLength": 1
},
"maxItems": 50,
"description": "Restrict the question to these attributes. Empty or absent means all of them."
},
"candidates": {
"type": "array",
"items": {
"type": "object",
"required": [
"id",
"attributes"
],
"properties": {
"id": {
"type": "string",
"maxLength": 128,
"minLength": 1,
"description": "Identifier, unique within the call."
},
"label": {
"type": "string",
"maxLength": 300,
"description": "Optional human-readable name, echoed unchanged."
},
"prior": {
"type": "number",
"default": 1,
"maximum": 1000,
"minimum": 0,
"description": "Relative likelihood of this candidate before asking. Used to weight the expected outcome."
},
"attributes": {
"type": "object",
"description": "What distinguishes this candidate. Values must be scalar.",
"additionalProperties": {
"type": [
"string",
"number",
"boolean",
"null"
]
}
}
},
"additionalProperties": false
},
"maxItems": 50,
"minItems": 2,
"description": "The competing intents, two to fifty."
},
"max_options": {
"type": "integer",
"default": 5,
"maximum": 10,
"minimum": 2,
"description": "How many answer options the question may offer. Excess values are named under omitted_values, never dropped silently."
},
"attribute_prompts": {
"type": "object",
"description": "Your own question wording per attribute. Used verbatim where given.",
"additionalProperties": {
"type": "string",
"maxLength": 300
}
}
},
"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
- 2026-08-19 15:04Z
- Last indexed by Roundhouse
- 2026-09-18 14:40Z
- Last enriched (probe, favicon, geo)
- 2026-09-23 09:45Z
- 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. 25 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 agent.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=agent.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://agent.halowerk.com/v1/intent-clarify, 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.