buero.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↓ 10%
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 30 snapshots so far.
$11.47
Verified settled volume
2,654 settlements proven x402 by their on-chain EIP-3009 marker.
$0.0040
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 2026-09-14 20:03Z
—
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://buero.halowerk.com/llms.txt",
"name": "doc_merge",
"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": "4000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
}
],
"pricing": "https://buero.halowerk.com/pricing",
"resource": {
"url": "https://buero.halowerk.com/v1/doc-merge",
"mimeType": "application/json",
"description": "Takes three documents — the common base and the two versions derived from it — as text, public URLs or inline base64, reads PDF, DOCX, ODT, HTML and Markdown, and returns one merged document. The procedure is diff3 over paragraphs, or over lines if you ask for that: each version is first compared against the base with a Myers shortest-edit-script, the two comparisons together yield the passages that are identical in all three, and each region between them is resolved by rule."
},
"extensions": {
"bazaar": {
"info": {
"input": {
"body": {
"a": {
"text": "§ 1 Gegenstand\nDer Auftragnehmer liefert Steuergeraete nach Anlage 1.\n\n§ 2 Menge\nGeliefert werden zwanzig Geraete.\n\n§ 3 Lieferort\nLieferort ist das Werk Ulm.\n\n§ 4 Laufzeit\nDer Vertrag laeuft zwoelf Monate.\n\n§ 5 Gerichtsstand\nGerichtsstand ist Berlin.\n\n§ 6 Zahlung\nDie Verguetung ist binnen 14 Tagen faellig."
},
"b": {
"text": "§ 1 Gegenstand\nDer Auftragnehmer liefert Steuergeraete nach Anlage 1.\n\n§ 2 Menge\nGeliefert werden zehn Geraete.\n\n§ 3 Lieferort\nLieferort ist das Werk Ulm.\n\n§ 4 Laufzeit\nDer Vertrag laeuft vierundzwanzig Monate.\n\n§ 5 Gerichtsstand\nGerichtsstand ist Berlin.\n\n§ 6 Zahlung\nDie Verguetung ist binnen 60 Tagen faellig."
},
"base": {
"text": "§ 1 Gegenstand\nDer Auftragnehmer liefert Steuergeraete nach Anlage 1.\n\n§ 2 Menge\nGeliefert werden zehn Geraete.\n\n§ 3 Lieferort\nLieferort ist das Werk Ulm.\n\n§ 4 Laufzeit\nDer Vertrag laeuft zwoelf Monate.\n\n§ 5 Gerichtsstand\nGerichtsstand ist Berlin.\n\n§ 6 Zahlung\nDie Verguetung ist binnen 30 Tagen faellig."
},
"label_a": "einkauf",
"label_b": "recht"
},
"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": [
"base",
"a",
"b"
],
"properties": {
"a": {
"type": "object",
"properties": {
"url": {
"type": "string",
"maxLength": 2048,
"description": "Public http(s) URL of a PDF, DOCX, ODT, HTML or text file. Private and local addresses are refused."
},
"text": {
"type": "string",
"maxLength": 200000,
"description": "The text directly. Cheapest and clearest — its length is billed as counted here."
},
"format": {
"enum": [
"auto",
"pdf",
"docx",
"odt",
"html",
"markdown",
"rtf",
"text"
],
"type": "string",
"default": "auto",
"description": "Override the detected format. \"auto\" reads it from the bytes."
},
"filename": {
"type": "string",
"maxLength": 260,
"description": "Only consulted when the bytes carry no recognisable signature."
},
"content_base64": {
"type": "string",
"maxLength": 4000000,
"description": "The file inline, base64."
}
},
"description": "The first version. Same shape as base.",
"additionalProperties": false
},
"b": {
"type": "object",
"properties": {
"url": {
"type": "string",
"maxLength": 2048,
"description": "Public http(s) URL of a PDF, DOCX, ODT, HTML or text file. Private and local addresses are refused."
},
"text": {
"type": "string",
"maxLength": 200000,
"description": "The text directly. Cheapest and clearest — its length is billed as counted here."
},
"format": {
"enum": [
"auto",
"pdf",
"docx",
"odt",
"html",
"markdown",
"rtf",
"text"
],
"type": "string",
"default": "auto",
"description": "Override the detected format. \"auto\" reads it from the bytes."
},
"filename": {
"type": "string",
"maxLength": 260,
"description": "Only consulted when the bytes carry no recognisable signature."
},
"content_base64": {
"type": "string",
"maxLength": 4000000,
"description": "The file inline, base64."
}
},
"description": "The second version. Same shape as base.",
"additionalProperties": false
},
"base": {
"type": "object",
"properties": {
"url": {
"type": "string",
"maxLength": 2048,
"description": "Public http(s) URL of a PDF, DOCX, ODT, HTML or text file. Private and local addresses are refused."
},
"text": {
"type": "string",
"maxLength": 200000,
"description": "The text directly. Cheapest and clearest — its length is billed as counted here."
},
"format": {
"enum": [
"auto",
"pdf",
"docx",
"odt",
"html",
"markdown",
"rtf",
"text"
],
"type": "string",
"default": "auto",
"description": "Override the detected format. \"auto\" reads it from the bytes."
},
"filename": {
"type": "string",
"maxLength": 260,
"description": "Only consulted when the bytes carry no recognisable signature."
},
"content_base64": {
"type": "string",
"maxLength": 4000000,
"description": "The file inline, base64."
}
},
"description": "The common base both versions came from. Exactly one of text, url or content_base64.",
"additionalProperties": false
},
"label_a": {
"type": "string",
"default": "a",
"maxLength": 60,
"description": "Name for the first version, used in conflict markers and in the conflict list."
},
"label_b": {
"type": "string",
"default": "b",
"maxLength": 60,
"description": "Name for the second version."
},
"merge_unit": {
"enum": [
"paragraph",
"line"
],
"type": "string",
"default": "paragraph",
"description": "What counts as one piece. paragraph: blank lines separate, which is how a contract is read — but two changes inside one paragraph then collide even when they concern different sentences. line: merges more finely and conflicts less often, though a paragraph written as one long line stays one piece either way."
},
"conflict_style": {
"enum": [
"markers",
"keep_base",
"none"
],
"type": "string",
"default": "markers",
"description": "markers: conflicts appear in merged_text between labelled markers. keep_base: the base wording is kept at the conflict site and the conflict is still reported — this is not a resolution. none: merged_text is withheld while any conflict remains."
},
"ignore_whitespace": {
"type": "boolean",
"default": true,
"description": "Treat runs of spaces and tabs as one space before comparing. Applied to all three documents alike."
},
"include_word_diff": {
"type": "boolean",
"default": true,
"description": "Include a word-level diff of each side against the base for every conflict."
},
"max_conflicts_detailed": {
"type": "integer",
"default": 50,
"maximum": 200,
"minimum": 1,
"description": "How many conflicts come back with their full text. Beyond this they are still counted and still marked in merged_text, only without the detail block."
}
},
"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": "0.004",
"description": "Takes three documents — the common base and the two versions derived from it — as text, public URLs or inline base64, reads PDF, DOCX, ODT, HTML and Markdown, and returns one merged document. The procedure is diff3 over paragraphs, or over lines if you ask for that: each version is first compared against the base with a Myers shortest-edit-script, the two comparisons together yield the passages that are identical in all three, and each region between them is resolved by rule. A region only one side touched is taken from that side; a region both sides changed to exactly the same text is taken once; and a region both sides changed differently is a conflict. Conflicts are never resolved. Each one comes back with the base wording, both competing versions, a word-level diff of each side against the base, and its position counted in units, and in the merged text it is marked with labelled markers, or the base wording is kept, or the merged text is withheld entirely — your choice, and whichever you pick the conflict is still reported and counted. The counts of merged, conflicting and unchanged paragraphs come alongside, plus a symmetric similarity figure for each version against the base and against the other version, and a flag saying whether the comparison really was the shortest edit script or hit its complexity ceiling, in which case the affected region is reported as a conflict rather than guessed at. What this endpoint does not do is decide. It does not judge which version is better, newer or more authoritative, does not know who wrote either, does not merge inside whichever unit you chose, and does not check that the merged document still makes sense as a whole — a merge that is clean by paragraph can still be contradictory in substance, and only a reader can see that. No model is involved and no external source is contacted: the same three inputs give byte-identical output, and no part of any document is written to a database, a cache, a log or an error message.",
"inputSchema": {
"type": "object",
"required": [
"base",
"a",
"b"
],
"properties": {
"a": {
"type": "object",
"properties": {
"url": {
"type": "string",
"maxLength": 2048,
"description": "Public http(s) URL of a PDF, DOCX, ODT, HTML or text file. Private and local addresses are refused."
},
"text": {
"type": "string",
"maxLength": 200000,
"description": "The text directly. Cheapest and clearest — its length is billed as counted here."
},
"format": {
"enum": [
"auto",
"pdf",
"docx",
"odt",
"html",
"markdown",
"rtf",
"text"
],
"type": "string",
"default": "auto",
"description": "Override the detected format. \"auto\" reads it from the bytes."
},
"filename": {
"type": "string",
"maxLength": 260,
"description": "Only consulted when the bytes carry no recognisable signature."
},
"content_base64": {
"type": "string",
"maxLength": 4000000,
"description": "The file inline, base64."
}
},
"description": "The first version. Same shape as base.",
"additionalProperties": false
},
"b": {
"type": "object",
"properties": {
"url": {
"type": "string",
"maxLength": 2048,
"description": "Public http(s) URL of a PDF, DOCX, ODT, HTML or text file. Private and local addresses are refused."
},
"text": {
"type": "string",
"maxLength": 200000,
"description": "The text directly. Cheapest and clearest — its length is billed as counted here."
},
"format": {
"enum": [
"auto",
"pdf",
"docx",
"odt",
"html",
"markdown",
"rtf",
"text"
],
"type": "string",
"default": "auto",
"description": "Override the detected format. \"auto\" reads it from the bytes."
},
"filename": {
"type": "string",
"maxLength": 260,
"description": "Only consulted when the bytes carry no recognisable signature."
},
"content_base64": {
"type": "string",
"maxLength": 4000000,
"description": "The file inline, base64."
}
},
"description": "The second version. Same shape as base.",
"additionalProperties": false
},
"base": {
"type": "object",
"properties": {
"url": {
"type": "string",
"maxLength": 2048,
"description": "Public http(s) URL of a PDF, DOCX, ODT, HTML or text file. Private and local addresses are refused."
},
"text": {
"type": "string",
"maxLength": 200000,
"description": "The text directly. Cheapest and clearest — its length is billed as counted here."
},
"format": {
"enum": [
"auto",
"pdf",
"docx",
"odt",
"html",
"markdown",
"rtf",
"text"
],
"type": "string",
"default": "auto",
"description": "Override the detected format. \"auto\" reads it from the bytes."
},
"filename": {
"type": "string",
"maxLength": 260,
"description": "Only consulted when the bytes carry no recognisable signature."
},
"content_base64": {
"type": "string",
"maxLength": 4000000,
"description": "The file inline, base64."
}
},
"description": "The common base both versions came from. Exactly one of text, url or content_base64.",
"additionalProperties": false
},
"label_a": {
"type": "string",
"default": "a",
"maxLength": 60,
"description": "Name for the first version, used in conflict markers and in the conflict list."
},
"label_b": {
"type": "string",
"default": "b",
"maxLength": 60,
"description": "Name for the second version."
},
"merge_unit": {
"enum": [
"paragraph",
"line"
],
"type": "string",
"default": "paragraph",
"description": "What counts as one piece. paragraph: blank lines separate, which is how a contract is read — but two changes inside one paragraph then collide even when they concern different sentences. line: merges more finely and conflicts less often, though a paragraph written as one long line stays one piece either way."
},
"conflict_style": {
"enum": [
"markers",
"keep_base",
"none"
],
"type": "string",
"default": "markers",
"description": "markers: conflicts appear in merged_text between labelled markers. keep_base: the base wording is kept at the conflict site and the conflict is still reported — this is not a resolution. none: merged_text is withheld while any conflict remains."
},
"ignore_whitespace": {
"type": "boolean",
"default": true,
"description": "Treat runs of spaces and tabs as one space before comparing. Applied to all three documents alike."
},
"include_word_diff": {
"type": "boolean",
"default": true,
"description": "Include a word-level diff of each side against the base for every conflict."
},
"max_conflicts_detailed": {
"type": "integer",
"default": 50,
"maximum": 200,
"minimum": 1,
"description": "How many conflicts come back with their full text. Beyond this they are still counted and still marked in merged_text, only without the detail block."
}
},
"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.
0.004USDC≈ $0.004 USD
on Base · exact scheme
Pay 0.004 USDC on Base to 0x2880…C4E5E. The signed payment is good for 5 minutes.
- Paid to
- 0x2880…C4E5E
- USD Coin contract
- 0x8335…02913
- Payment window
- 5 minutes
- As published
- 4000 smallest units
The catalog’s raw entry
[
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"asset": "USDC",
"version": "2",
"eip712Domain": {
"name": "USD Coin",
"chainId": 8453,
"version": "2",
"verifyingContract": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913"
},
"network_name": "Base Mainnet",
"assetTransferMethod": "eip3009"
},
"payTo": "0x2880EdfFF13100677Bf97A3CBdF3Bc34771C4E5E",
"amount": "4000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
}
]Extensions
{
"bazaar": {
"info": {
"input": {
"body": {
"a": {
"text": "§ 1 Gegenstand\nDer Auftragnehmer liefert Steuergeraete nach Anlage 1.\n\n§ 2 Menge\nGeliefert werden zwanzig Geraete.\n\n§ 3 Lieferort\nLieferort ist das Werk Ulm.\n\n§ 4 Laufzeit\nDer Vertrag laeuft zwoelf Monate.\n\n§ 5 Gerichtsstand\nGerichtsstand ist Berlin.\n\n§ 6 Zahlung\nDie Verguetung ist binnen 14 Tagen faellig."
},
"b": {
"text": "§ 1 Gegenstand\nDer Auftragnehmer liefert Steuergeraete nach Anlage 1.\n\n§ 2 Menge\nGeliefert werden zehn Geraete.\n\n§ 3 Lieferort\nLieferort ist das Werk Ulm.\n\n§ 4 Laufzeit\nDer Vertrag laeuft vierundzwanzig Monate.\n\n§ 5 Gerichtsstand\nGerichtsstand ist Berlin.\n\n§ 6 Zahlung\nDie Verguetung ist binnen 60 Tagen faellig."
},
"base": {
"text": "§ 1 Gegenstand\nDer Auftragnehmer liefert Steuergeraete nach Anlage 1.\n\n§ 2 Menge\nGeliefert werden zehn Geraete.\n\n§ 3 Lieferort\nLieferort ist das Werk Ulm.\n\n§ 4 Laufzeit\nDer Vertrag laeuft zwoelf Monate.\n\n§ 5 Gerichtsstand\nGerichtsstand ist Berlin.\n\n§ 6 Zahlung\nDie Verguetung ist binnen 30 Tagen faellig."
},
"label_a": "einkauf",
"label_b": "recht"
},
"type": "http",
"method": "POST",
"bodyType": "json"
}
},
"schema": {
"type": "object",
"$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": [
"base",
"a",
"b"
],
"properties": {
"a": {
"type": "object",
"properties": {
"url": {
"type": "string",
"maxLength": 2048,
"description": "Public http(s) URL of a PDF, DOCX, ODT, HTML or text file. Private and local addresses are refused."
},
"text": {
"type": "string",
"maxLength": 200000,
"description": "The text directly. Cheapest and clearest — its length is billed as counted here."
},
"format": {
"enum": [
"auto",
"pdf",
"docx",
"odt",
"html",
"markdown",
"rtf",
"text"
],
"type": "string",
"default": "auto",
"description": "Override the detected format. \"auto\" reads it from the bytes."
},
"filename": {
"type": "string",
"maxLength": 260,
"description": "Only consulted when the bytes carry no recognisable signature."
},
"content_base64": {
"type": "string",
"maxLength": 4000000,
"description": "The file inline, base64."
}
},
"description": "The first version. Same shape as base.",
"additionalProperties": false
},
"b": {
"type": "object",
"properties": {
"url": {
"type": "string",
"maxLength": 2048,
"description": "Public http(s) URL of a PDF, DOCX, ODT, HTML or text file. Private and local addresses are refused."
},
"text": {
"type": "string",
"maxLength": 200000,
"description": "The text directly. Cheapest and clearest — its length is billed as counted here."
},
"format": {
"enum": [
"auto",
"pdf",
"docx",
"odt",
"html",
"markdown",
"rtf",
"text"
],
"type": "string",
"default": "auto",
"description": "Override the detected format. \"auto\" reads it from the bytes."
},
"filename": {
"type": "string",
"maxLength": 260,
"description": "Only consulted when the bytes carry no recognisable signature."
},
"content_base64": {
"type": "string",
"maxLength": 4000000,
"description": "The file inline, base64."
}
},
"description": "The second version. Same shape as base.",
"additionalProperties": false
},
"base": {
"type": "object",
"properties": {
"url": {
"type": "string",
"maxLength": 2048,
"description": "Public http(s) URL of a PDF, DOCX, ODT, HTML or text file. Private and local addresses are refused."
},
"text": {
"type": "string",
"maxLength": 200000,
"description": "The text directly. Cheapest and clearest — its length is billed as counted here."
},
"format": {
"enum": [
"auto",
"pdf",
"docx",
"odt",
"html",
"markdown",
"rtf",
"text"
],
"type": "string",
"default": "auto",
"description": "Override the detected format. \"auto\" reads it from the bytes."
},
"filename": {
"type": "string",
"maxLength": 260,
"description": "Only consulted when the bytes carry no recognisable signature."
},
"content_base64": {
"type": "string",
"maxLength": 4000000,
"description": "The file inline, base64."
}
},
"description": "The common base both versions came from. Exactly one of text, url or content_base64.",
"additionalProperties": false
},
"label_a": {
"type": "string",
"default": "a",
"maxLength": 60,
"description": "Name for the first version, used in conflict markers and in the conflict list."
},
"label_b": {
"type": "string",
"default": "b",
"maxLength": 60,
"description": "Name for the second version."
},
"merge_unit": {
"enum": [
"paragraph",
"line"
],
"type": "string",
"default": "paragraph",
"description": "What counts as one piece. paragraph: blank lines separate, which is how a contract is read — but two changes inside one paragraph then collide even when they concern different sentences. line: merges more finely and conflicts less often, though a paragraph written as one long line stays one piece either way."
},
"conflict_style": {
"enum": [
"markers",
"keep_base",
"none"
],
"type": "string",
"default": "markers",
"description": "markers: conflicts appear in merged_text between labelled markers. keep_base: the base wording is kept at the conflict site and the conflict is still reported — this is not a resolution. none: merged_text is withheld while any conflict remains."
},
"ignore_whitespace": {
"type": "boolean",
"default": true,
"description": "Treat runs of spaces and tabs as one space before comparing. Applied to all three documents alike."
},
"include_word_diff": {
"type": "boolean",
"default": true,
"description": "Include a word-level diff of each side against the base for every conflict."
},
"max_conflicts_detailed": {
"type": "integer",
"default": 50,
"maximum": 200,
"minimum": 1,
"description": "How many conflicts come back with their full text. Beyond this they are still counted and still marked in merged_text, only without the detail block."
}
},
"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
- 2026-09-14 20:03Z
- Last indexed by Roundhouse
- 2026-09-24 09:50Z
- 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. 30 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 buero.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=buero.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://buero.halowerk.com/v1/doc-merge, 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.