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.
DataLiveeip155:8453Exactvia cdp
Calls · 30d
1
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 3 snapshots so far.
$22.11
Verified settled volume
A floor: summed over 5,000 of 6,901 verified settlements.
$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 2026-10-23 07:32Z
—
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.
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": {
"items": [
{
"xml": "<?xml version=\"1.0\" encoding=\"UTF-8\"?><assessmentItem xmlns=\"http://www.imsglobal.org/xsd/imsqti_v2p1\" identifier=\"single\" title=\"single\" adaptive=\"false\" timeDependent=\"false\"><responseDeclaration identifier=\"RESPONSE\" cardinality=\"single\" baseType=\"identifier\"><correctResponse><value>A</value></correctResponse></responseDeclaration><outcomeDeclaration identifier=\"SCORE\" cardinality=\"single\" baseType=\"float\"><defaultValue><value>0</value></defaultValue></outcomeDeclaration><itemBody><p><img src=\"media/diagram.png\" alt=\"Synthetic one-pixel fixture\"/></p><choiceInteraction responseIdentifier=\"RESPONSE\" shuffle=\"false\" maxChoices=\"1\"><simpleChoice identifier=\"A\">Alpha</simpleChoice><simpleChoice identifier=\"B\">Beta</simpleChoice><simpleChoice identifier=\"C\">Gamma</simpleChoice></choiceInteraction></itemBody><responseProcessing template=\"http://www.imsglobal.org/question/qti_v2p1/rptemplates/match_correct\"/></assessmentItem>",
"item_id": "single"
},
{
"xml": "<?xml version=\"1.0\" encoding=\"UTF-8\"?><assessmentItem xmlns=\"http://www.imsglobal.org/xsd/imsqti_v2p1\" identifier=\"multiple\" title=\"multiple\" adaptive=\"false\" timeDependent=\"false\"><responseDeclaration identifier=\"RESPONSE\" cardinality=\"multiple\" baseType=\"identifier\"><correctResponse><value>A</value><value>B</value></correctResponse><mapping defaultValue=\"-2\" lowerBound=\"0\" upperBound=\"3\"><mapEntry mapKey=\"A\" mappedValue=\"2\"/><mapEntry mapKey=\"B\" mappedValue=\"1\"/><mapEntry mapKey=\"C\" mappedValue=\"-1\"/></mapping></responseDeclaration><outcomeDeclaration identifier=\"SCORE\" cardinality=\"single\" baseType=\"float\"><defaultValue><value>0</value></defaultValue></outcomeDeclaration><itemBody><choiceInteraction responseIdentifier=\"RESPONSE\" shuffle=\"false\" maxChoices=\"3\"><simpleChoice identifier=\"A\">Alpha</simpleChoice><simpleChoice identifier=\"B\">Beta</simpleChoice><simpleChoice identifier=\"C\">Gamma</simpleChoice></choiceInteraction></itemBody><responseProcessing template=\"http://www.imsglobal.org/question/qti_v2p1/rptemplates/map_response\"/></assessmentItem>",
"item_id": "multiple"
},
{
"xml": "<?xml version=\"1.0\" encoding=\"UTF-8\"?><assessmentItem xmlns=\"http://www.imsglobal.org/xsd/imsqti_v2p1\" identifier=\"numeric\" title=\"numeric\" adaptive=\"false\" timeDependent=\"false\"><responseDeclaration identifier=\"RESPONSE\" cardinality=\"single\" baseType=\"float\"><correctResponse><value>42</value></correctResponse></responseDeclaration><outcomeDeclaration identifier=\"SCORE\" cardinality=\"single\" baseType=\"float\"><defaultValue><value>0</value></defaultValue></outcomeDeclaration><itemBody><p>Answer: <textEntryInteraction responseIdentifier=\"RESPONSE\"/></p></itemBody><responseProcessing template=\"http://www.imsglobal.org/question/qti_v2p1/rptemplates/match_correct\"/></assessmentItem>",
"item_id": "numeric"
},
{
"xml": "<?xml version=\"1.0\" encoding=\"UTF-8\"?><assessmentItem xmlns=\"http://www.imsglobal.org/xsd/imsqti_v2p1\" identifier=\"text\" title=\"text\" adaptive=\"false\" timeDependent=\"false\"><responseDeclaration identifier=\"RESPONSE\" cardinality=\"single\" baseType=\"string\"><correctResponse><value>Grüße</value></correctResponse></responseDeclaration><outcomeDeclaration identifier=\"SCORE\" cardinality=\"single\" baseType=\"float\"><defaultValue><value>0</value></defaultValue></outcomeDeclaration><itemBody><p>Answer: <textEntryInteraction responseIdentifier=\"RESPONSE\"/></p></itemBody><responseProcessing><responseCondition><responseIf><stringMatch caseSensitive=\"false\" substring=\"false\"><variable identifier=\"RESPONSE\"/><baseValue baseType=\"string\">Grüße</baseValue></stringMatch><setOutcomeValue identifier=\"SCORE\"><baseValue baseType=\"float\">2</baseValue></setOutcomeValue></responseIf><responseElse><setOutcomeValue identifier=\"SCORE\"><baseValue baseType=\"float\">0</baseValue></setOutcomeValue></responseElse></responseCondition></responseProcessing></assessmentItem>",
"item_id": "text"
},
{
"xml": "<?xml version=\"1.0\" encoding=\"UTF-8\"?><assessmentItem xmlns=\"http://www.imsglobal.org/xsd/imsqti_v2p1\" identifier=\"ordered\" title=\"ordered\" adaptive=\"false\" timeDependent=\"false\"><responseDeclaration identifier=\"RESPONSE\" cardinality=\"ordered\" baseType=\"identifier\"><correctResponse><value>A</value><value>B</value><value>C</value></correctResponse></responseDeclaration><outcomeDeclaration identifier=\"SCORE\" cardinality=\"single\" baseType=\"float\"><defaultValue><value>0</value></defaultValue></outcomeDeclaration><itemBody><orderInteraction responseIdentifier=\"RESPONSE\" shuffle=\"false\"><simpleChoice identifier=\"A\">Alpha</simpleChoice><simpleChoice identifier=\"B\">Beta</simpleChoice><simpleChoice identifier=\"C\">Gamma</simpleChoice></orderInteraction></itemBody><responseProcessing template=\"http://www.imsglobal.org/question/qti_v2p1/rptemplates/match_correct\"/></assessmentItem>",
"item_id": "ordered"
}
],
"assets": [
{
"name": "media/diagram.png",
"media_type": "image/png",
"content_base64": "iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAIAAACQd1PeAAAADElEQVR4nGP4//8/AAX+Av4N70a4AAAAAElFTkSuQmCC"
}
],
"bank_id": "supplied_bank",
"fixtures": [
{
"events": [
{
"item_id": "single",
"responses": [
{
"values": [
"A"
],
"response_id": "RESPONSE"
}
],
"persist_and_reopen": false
},
{
"item_id": "multiple",
"responses": [
{
"values": [
"A",
"B"
],
"response_id": "RESPONSE"
}
],
"persist_and_reopen": true
},
{
"item_id": "numeric",
"responses": [
{
"values": [
"42.0"
],
"response_id": "RESPONSE"
}
],
"persist_and_reopen": false
},
{
"item_id": "text",
"responses": [
{
"values": [
"GRÜßE"
],
"response_id": "RESPONSE"
}
],
"persist_and_reopen": false
},
{
"item_id": "ordered",
"responses": [
{
"values": [
"A",
"B",
"C"
],
"response_id": "RESPONSE"
}
],
"persist_and_reopen": false
}
],
"expected": {
"items": [
{
"score": "1",
"item_id": "single",
"attempts": 1,
"response_valid": true,
"invalid_response_ids": [],
"unbound_response_ids": []
},
{
"score": "3",
"item_id": "multiple",
"attempts": 1,
"response_valid": true,
"invalid_response_ids": [],
"unbound_response_ids": []
},
{
"score": "1",
"item_id": "numeric",
"attempts": 1,
"response_valid": true,
"invalid_response_ids": [],
"unbound_response_ids": []
},
{
"score": "2",
"item_id": "text",
"attempts": 1,
"response_valid": true,
"invalid_response_ids": [],
"unbound_response_ids": []
},
{
"score": "1",
"item_id": "ordered",
"attempts": 1,
"response_valid": true,
"invalid_response_ids": [],
"unbound_response_ids": []
}
],
"passed": true,
"test_score": "8"
},
"fixture_id": "correct"
},
{
"events": [
{
"item_id": "single",
"responses": [
{
"values": [
"A"
],
"response_id": "RESPONSE"
}
],
"persist_and_reopen": false
},
{
"item_id": "multiple",
"responses": [
{
"values": [
"A",
"C"
],
"response_id": "RESPONSE"
}
],
"persist_and_reopen": true
},
{
"item_id": "numeric",
"responses": [
{
"values": [
"41"
],
"response_id": "RESPONSE"
}
],
"persist_and_reopen": false
},
{
"item_id": "text",
"responses": [
{
"values": [
"grüße"
],
"response_id": "RESPONSE"
}
],
"persist_and_reopen": false
},
{
"item_id": "ordered",
"responses": [
{
"values": [
"C",
"B",
"A"
],
"response_id": "RESPONSE"
}
],
"persist_and_reopen": false
}
],
"expected": {
"items": [
{
"score": "1",
"item_id": "single",
"attempts": 1,
"response_valid": true,
"invalid_response_ids": [],
"unbound_response_ids": []
},
{
"score": "1",
"item_id": "multiple",
"attempts": 1,
"response_valid": true,
"invalid_response_ids": [],
"unbound_response_ids": []
},
{
"score": "1",
"item_id": "numeric",
"attempts": 1,
"response_valid": true,
"invalid_response_ids": [],
"unbound_response_ids": []
},
{
"score": "2",
"item_id": "text",
"attempts": 1,
"response_valid": true,
"invalid_response_ids": [],
"unbound_response_ids": []
},
{
"score": "0",
"item_id": "ordered",
"attempts": 1,
"response_valid": true,
"invalid_response_ids": [],
"unbound_response_ids": []
}
],
"passed": true,
"test_score": "5"
},
"fixture_id": "expected_discrepancies"
}
],
"cut_value": "6",
"maximum_score": "8",
"score_tolerance": "0"
},
"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": [
"bank_id",
"maximum_score",
"cut_value",
"score_tolerance",
"items",
"assets",
"fixtures"
],
"properties": {
"items": {
"type": "array",
"items": {
"type": "object",
"required": [
"item_id",
"xml"
],
"properties": {
"xml": {
"type": "string",
"maxLength": 131072,
"minLength": 1
},
"item_id": {
"type": "string",
"pattern": "^[A-Za-z_][A-Za-z0-9_.-]{0,63}$"
}
},
"additionalProperties": false
},
"maxItems": 16,
"minItems": 1
},
"assets": {
"type": "array",
"items": {
"type": "object",
"required": [
"name",
"media_type",
"content_base64"
],
"properties": {
"name": {
"type": "string",
"pattern": "^[A-Za-z0-9][A-Za-z0-9_./-]{0,127}$"
},
"media_type": {
"enum": [
"image/png",
"image/jpeg",
"image/gif",
"image/webp"
]
},
"content_base64": {
"type": "string",
"maxLength": 174764,
"minLength": 4
}
},
"additionalProperties": false
},
"maxItems": 32,
"minItems": 0
},
"bank_id": {
"type": "string",
"pattern": "^[A-Za-z_][A-Za-z0-9_.-]{0,63}$"
},
"fixtures": {
"type": "array",
"items": {
"type": "object",
"required": [
"fixture_id",
"events",
"expected"
],
"properties": {
"events": {
"type": "array",
"items": {
"type": "object",
"required": [
"item_id",
"responses",
"persist_and_reopen"
],
"properties": {
"item_id": {
"type": "string",
"pattern": "^[A-Za-z_][A-Za-z0-9_.-]{0,63}$"
},
"responses": {
"type": "array",
"items": {
"type": "object",
"required": [
"response_id",
"values"
],
"properties": {
"values": {
"type": "array",
"items": {
"type": "string",
"maxLength": 4096,
"minLength": 0
},
"maxItems": 64,
"minItems": 0
},
"response_id": {
"type": "string",
"pattern": "^[A-Za-z_][A-Za-z0-9_.-]{0,63}$"
}
},
"additionalProperties": false
},
"maxItems": 32,
"minItems": 0
},
"persist_and_reopen": {
"type": "boolean"
}
},
"additionalProperties": false
},
"maxItems": 64,
"minItems": 0
},
"expected": {
"type": "object",
"required": [
"test_score",
"passed",
"items"
],
"properties": {
"items": {
"type": "array",
"items": {
"type": "object",
"required": [
"item_id",
"score",
"attempts",
"response_valid",
"unbound_response_ids",
"invalid_response_ids"
],
"properties": {
"score": {
"anyOf": [
{
"type": "string",
"pattern": "^-?(0|[1-9][0-9]{0,6})(\\.[0-9]{1,9})?$"
},
{
"type": "null"
}
]
},
"item_id": {
"type": "string",
"pattern": "^[A-Za-z_][A-Za-z0-9_.-]{0,63}$"
},
"attempts": {
"type": "integer",
"maximum": 64,
"minimum": 0
},
"response_valid": {
"type": "boolean"
},
"invalid_response_ids": {
"type": "array",
"items": {
"type": "string",
"pattern": "^[A-Za-z_][A-Za-z0-9_.-]{0,63}$"
},
"maxItems": 32,
"minItems": 0,
"uniqueItems": true
},
"unbound_response_ids": {
"type": "array",
"items": {
"type": "string",
"pattern": "^[A-Za-z_][A-Za-z0-9_.-]{0,63}$"
},
"maxItems": 32,
"minItems": 0,
"uniqueItems": true
}
},
"additionalProperties": false
},
"maxItems": 16,
"minItems": 1
},
"passed": {
"type": [
"boolean",
"null"
]
},
"test_score": {
"anyOf": [
{
"type": "string",
"pattern": "^-?(0|[1-9][0-9]{0,6})(\\.[0-9]{1,9})?$"
},
{
"type": "null"
}
]
}
},
"additionalProperties": false
},
"fixture_id": {
"type": "string",
"pattern": "^[A-Za-z_][A-Za-z0-9_.-]{0,63}$"
}
},
"additionalProperties": false
},
"maxItems": 16,
"minItems": 1
},
"cut_value": {
"anyOf": [
{
"type": "string",
"pattern": "^-?(0|[1-9][0-9]{0,6})(\\.[0-9]{1,9})?$"
},
{
"type": "null"
}
]
},
"maximum_score": {
"type": "string",
"pattern": "^-?(0|[1-9][0-9]{0,6})(\\.[0-9]{1,9})?$"
},
"score_tolerance": {
"type": "string",
"pattern": "^-?(0|[1-9][0-9]{0,6})(\\.[0-9]{1,9})?$"
}
},
"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
- 2026-10-23 07:32Z
- Last indexed by Roundhouse
- 2026-10-26 16:50Z
- Last enriched (probe, favicon, geo)
- 2026-10-23 11:15Z
- 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. 3 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/oss-openolat-question-bank-answer-fixture-review, 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. Either pay over x402 (mint a personal key for $0.01 at GET https://api.roundhouseai.io/v0/test/x402), or ask me for an organization key, which I create at https://roundhouseai.io/dashboard/connections. If you have neither, ask before going further. If you do not have Roundhouse tools or skills installed, read https://roundhouseai.io/skill.md first — it is the whole procedure.