medien.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.
MediaLiveeip155:8453Exactvia cdp
Calls · 30d
1→ 0%
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 18 snapshots so far.
$11.47
Verified settled volume
2,654 settlements proven x402 by their on-chain EIP-3009 marker.
$0.080
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 15:48Z
—
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://medien.halowerk.com/llms.txt",
"name": "tts",
"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": "80000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
}
],
"pricing": "https://medien.halowerk.com/pricing",
"resource": {
"url": "https://medien.halowerk.com/v1/tts",
"mimeType": "application/json",
"description": "Takes a text and returns it spoken, as MP3, WAV, Opus, FLAC or raw linear16, encoded base64 with its media type and the resulting running time. The voice is chosen freely from the provider catalogue — over a hundred voices across languages and accents — and is validated against that catalogue before the request goes out, so a mistyped voice name comes back immediately with a list of near matches instead of a provider error."
},
"extensions": {
"bazaar": {
"info": {
"input": {
"body": {
"text": "Der Vertrag laeuft zwoelf Monate und verlaengert sich automatisch, wenn er nicht fristgerecht gekuendigt wird.",
"voice": "aura-2-thalia-en",
"encoding": "mp3"
},
"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": [
"text"
],
"properties": {
"text": {
"type": "string",
"maxLength": 10000,
"minLength": 1,
"description": "The text to speak. At most 10000 characters per call."
},
"voice": {
"type": "string",
"default": "aura-2-thalia-en",
"maxLength": 60,
"description": "Provider voice name, e.g. aura-2-thalia-en, aura-2-agathe-fr. Checked against the provider catalogue before the request is sent. Aura-1 voices are billed at half the Aura-2 rate."
},
"encoding": {
"enum": [
"mp3",
"wav",
"opus",
"flac",
"linear16"
],
"type": "string",
"default": "mp3",
"description": "Audio format of the result."
},
"include_audio": {
"type": "boolean",
"default": true,
"description": "Return the audio base64. Off returns only the figures — useful for checking the price and length first."
}
},
"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": "0.080000",
"description": "Takes a text and returns it spoken, as MP3, WAV, Opus, FLAC or raw linear16, encoded base64 with its media type and the resulting running time. The voice is chosen freely from the provider catalogue — over a hundred voices across languages and accents — and is validated against that catalogue before the request goes out, so a mistyped voice name comes back immediately with a list of near matches instead of a provider error. Pricing follows the voice: Aura-2 costs twice as much at the provider as Aura-1, so charging both alike would overcharge the cheaper one, and the rate that applies is stated in the payment challenge before you pay. The purchase cost is computed from the character count the provider itself reports and returned with every answer, so the margin is verifiable rather than asserted. Processing is by Deepgram, whose terms make training on submitted content the default; this service therefore sends the per-request opt-out on every call, and states plainly that the effect of that opt-out cannot be verified from the client side because unknown parameters are accepted just as silently. The result is machine-generated speech and the provider forbids passing it off as a human recording — if it goes somewhere a listener could mistake it for a person, that is the caller's disclosure to make. Nothing is cached and no text is written to any database, log or error message.",
"inputSchema": {
"type": "object",
"required": [
"text"
],
"properties": {
"text": {
"type": "string",
"maxLength": 10000,
"minLength": 1,
"description": "The text to speak. At most 10000 characters per call."
},
"voice": {
"type": "string",
"default": "aura-2-thalia-en",
"maxLength": 60,
"description": "Provider voice name, e.g. aura-2-thalia-en, aura-2-agathe-fr. Checked against the provider catalogue before the request is sent. Aura-1 voices are billed at half the Aura-2 rate."
},
"encoding": {
"enum": [
"mp3",
"wav",
"opus",
"flac",
"linear16"
],
"type": "string",
"default": "mp3",
"description": "Audio format of the result."
},
"include_audio": {
"type": "boolean",
"default": true,
"description": "Return the audio base64. Off returns only the figures — useful for checking the price and length first."
}
},
"additionalProperties": false
},
"price_basis": {
"unit": "1000 Zeichen",
"basis": "Zeichen des uebergebenen Textes, aufgerundet auf angefangene 1000. Der Einheitspreis haengt an der Stimmengeneration: aura-2 kostet beim Anbieter 0.03 USD je 1000 Zeichen.",
"units": 1,
"voice": "aura-2-thalia-en",
"characters": 0,
"generation": "aura-2",
"unit_price_usdc": 0.08
},
"price_model": {
"kind": "per_unit",
"unit": "1000 Zeichen",
"max_usdc": "0.80",
"min_usdc": "0.040",
"max_units": 10,
"unit_price_usdc": "0.080",
"unit_price_usdc_aura1": "0.040"
},
"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.
0.08USDC≈ $0.08 USD
on Base · exact scheme
Pay 0.08 USDC on Base to 0x2880…C4E5E. The signed payment is good for 5 minutes.
- Paid to
- 0x2880…C4E5E
- USD Coin contract
- 0x8335…02913
- Payment window
- 5 minutes
- As published
- 80000 smallest units
The catalog’s raw entry
[
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"asset": "USDC",
"version": "2",
"eip712Domain": {
"name": "USD Coin",
"chainId": 8453,
"version": "2",
"verifyingContract": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913"
},
"network_name": "Base Mainnet",
"assetTransferMethod": "eip3009"
},
"payTo": "0x2880EdfFF13100677Bf97A3CBdF3Bc34771C4E5E",
"amount": "80000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
}
]Extensions
{
"bazaar": {
"info": {
"input": {
"body": {
"text": "Der Vertrag laeuft zwoelf Monate und verlaengert sich automatisch, wenn er nicht fristgerecht gekuendigt wird.",
"voice": "aura-2-thalia-en",
"encoding": "mp3"
},
"type": "http",
"method": "POST",
"bodyType": "json"
}
},
"schema": {
"type": "object",
"$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": [
"text"
],
"properties": {
"text": {
"type": "string",
"maxLength": 10000,
"minLength": 1,
"description": "The text to speak. At most 10000 characters per call."
},
"voice": {
"type": "string",
"default": "aura-2-thalia-en",
"maxLength": 60,
"description": "Provider voice name, e.g. aura-2-thalia-en, aura-2-agathe-fr. Checked against the provider catalogue before the request is sent. Aura-1 voices are billed at half the Aura-2 rate."
},
"encoding": {
"enum": [
"mp3",
"wav",
"opus",
"flac",
"linear16"
],
"type": "string",
"default": "mp3",
"description": "Audio format of the result."
},
"include_audio": {
"type": "boolean",
"default": true,
"description": "Return the audio base64. Off returns only the figures — useful for checking the price and length first."
}
},
"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 15:48Z
- Last indexed by Roundhouse
- 2026-09-10 15:30Z
- Last enriched (probe, favicon, geo)
- 2026-09-21 05:45Z
- x402 version
- 2
- Max timeout
- 300s
- Liveness probe
- HTTP 400
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. 18 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 medien.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=medien.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://medien.halowerk.com/v1/tts, 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.