medien.halowerk.com
Takes between two and eight images by URL or inline base64 and compares each pair. Three perceptual hashes are computed, because each fails differently: an average hash over an 8x8 grey image is cheap but moves with brightness, a gradient hash reads the slope between neighbouring pixels and survives exposure changes, and a DCT hash over the low frequencies of a 32x32 grey image is the sturdiest against rescaling and re-encoding.
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.
$0.0050
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 2026-08-11 13:11Z
—
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": "image_dupe",
"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://medien.halowerk.com/pricing",
"resource": {
"url": "https://medien.halowerk.com/v1/image-dupe",
"mimeType": "application/json",
"description": "Takes between two and eight images by URL or inline base64 and compares each pair. Three perceptual hashes are computed, because each fails differently: an average hash over an 8x8 grey image is cheap but moves with brightness, a gradient hash reads the slope between neighbouring pixels and survives exposure changes, and a DCT hash over the low frequencies of a 32x32 grey image is the sturdiest against rescaling and re-encoding."
},
"extensions": {
"bazaar": {
"info": {
"input": {
"body": {
"images": [
{
"url": "https://example.com/a.jpg",
"label": "original"
},
{
"url": "https://example.com/b.jpg",
"label": "verdaechtig"
}
]
},
"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": [
"images"
],
"properties": {
"images": {
"type": "array",
"items": {
"type": "object",
"properties": {
"url": {
"type": "string",
"maxLength": 2048,
"description": "Public http(s) URL of the image."
},
"label": {
"type": "string",
"maxLength": 120,
"description": "Name used in the answer. Defaults to image_1, image_2 …"
},
"filename": {
"type": "string",
"maxLength": 260
},
"content_base64": {
"type": "string",
"maxLength": 12000000,
"description": "The image inline, base64."
}
},
"additionalProperties": false
},
"maxItems": 8,
"minItems": 2,
"description": "Two to eight images. Each takes either url or content_base64."
},
"check_mirror": {
"type": "boolean",
"default": false,
"description": "Also compare against the mirrored image."
},
"check_rotations": {
"type": "boolean",
"default": false,
"description": "Also compare against the other image rotated 90, 180 and 270 degrees."
},
"phash_threshold": {
"type": "integer",
"maximum": 32,
"minimum": 0,
"description": "Override the pHash distance below which a pair counts as likely edited. Default 10."
}
},
"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 between two and eight images by URL or inline base64 and compares each pair. Three perceptual hashes are computed, because each fails differently: an average hash over an 8x8 grey image is cheap but moves with brightness, a gradient hash reads the slope between neighbouring pixels and survives exposure changes, and a DCT hash over the low frequencies of a 32x32 grey image is the sturdiest against rescaling and re-encoding. A SHA-256 catches byte-identical files, which perceptual hashes cannot distinguish from a lossless re-save. Every pair comes back with all three Hamming distances, the verdict, and the thresholds that produced it, so a caller sorting a large collection can move the line without re-buying. Optional checks re-hash the second image mirrored and rotated by 90, 180 and 270 degrees and report which transform matched, because a rotated copy is a duplicate to a human and a completely different image to a hash. Images too flat to carry a hash verdict — colour fields, blank scans, a logo on white — are detected and returned as inconclusive with their measured distances rather than as a match, because in the low-frequency band two unrelated plain surfaces sit as close together as two copies of the same photograph, and reporting that as a duplicate would be the easiest way for this endpoint to be confidently wrong. The other limits are stated rather than implied: perceptual hashing is robust against rescaling, re-compression, mild colour and brightness changes, and reasonably robust against small overlays; it is not robust against cropping, which shifts the whole frame, and it says nothing about whether two images show the same object or scene. This is duplicate detection, not image recognition, and neither the images nor their hashes are stored beyond the request.",
"inputSchema": {
"type": "object",
"required": [
"images"
],
"properties": {
"images": {
"type": "array",
"items": {
"type": "object",
"properties": {
"url": {
"type": "string",
"maxLength": 2048,
"description": "Public http(s) URL of the image."
},
"label": {
"type": "string",
"maxLength": 120,
"description": "Name used in the answer. Defaults to image_1, image_2 …"
},
"filename": {
"type": "string",
"maxLength": 260
},
"content_base64": {
"type": "string",
"maxLength": 12000000,
"description": "The image inline, base64."
}
},
"additionalProperties": false
},
"maxItems": 8,
"minItems": 2,
"description": "Two to eight images. Each takes either url or content_base64."
},
"check_mirror": {
"type": "boolean",
"default": false,
"description": "Also compare against the mirrored image."
},
"check_rotations": {
"type": "boolean",
"default": false,
"description": "Also compare against the other image rotated 90, 180 and 270 degrees."
},
"phash_threshold": {
"type": "integer",
"maximum": 32,
"minimum": 0,
"description": "Override the pHash distance below which a pair counts as likely edited. Default 10."
}
},
"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≈ $0.005 USD
on Base · exact scheme
Pay 0.005 USDC on Base to 0x2880…C4E5E. The signed payment is good for 5 minutes.
- Paid to
- 0x2880…C4E5E
- USD Coin contract
- 0x8335…02913
- Payment window
- 5 minutes
- As published
- 5000 smallest units
The catalog’s raw entry
[
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"asset": "USDC",
"version": "2",
"eip712Domain": {
"name": "USD Coin",
"chainId": 8453,
"version": "2",
"verifyingContract": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913"
},
"network_name": "Base Mainnet",
"assetTransferMethod": "eip3009"
},
"payTo": "0x2880EdfFF13100677Bf97A3CBdF3Bc34771C4E5E",
"amount": "5000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
}
]Extensions
{
"bazaar": {
"info": {
"input": {
"body": {
"images": [
{
"url": "https://example.com/a.jpg",
"label": "original"
},
{
"url": "https://example.com/b.jpg",
"label": "verdaechtig"
}
]
},
"type": "http",
"method": "POST",
"bodyType": "json"
}
},
"schema": {
"type": "object",
"$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": [
"images"
],
"properties": {
"images": {
"type": "array",
"items": {
"type": "object",
"properties": {
"url": {
"type": "string",
"maxLength": 2048,
"description": "Public http(s) URL of the image."
},
"label": {
"type": "string",
"maxLength": 120,
"description": "Name used in the answer. Defaults to image_1, image_2 …"
},
"filename": {
"type": "string",
"maxLength": 260
},
"content_base64": {
"type": "string",
"maxLength": 12000000,
"description": "The image inline, base64."
}
},
"additionalProperties": false
},
"maxItems": 8,
"minItems": 2,
"description": "Two to eight images. Each takes either url or content_base64."
},
"check_mirror": {
"type": "boolean",
"default": false,
"description": "Also compare against the mirrored image."
},
"check_rotations": {
"type": "boolean",
"default": false,
"description": "Also compare against the other image rotated 90, 180 and 270 degrees."
},
"phash_threshold": {
"type": "integer",
"maximum": 32,
"minimum": 0,
"description": "Override the pHash distance below which a pair counts as likely edited. Default 10."
}
},
"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 13:11Z
- Last indexed by Roundhouse
- 2026-09-10 13:00Z
- Last enriched (probe, favicon, geo)
- 2026-09-21 04:45Z
- 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. 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/image-dupe, 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.