DubbleBlack
DubbleBlack Powder provides aggregated first-party behavioral and verified transaction evidence for product recommendations. Given a vertical, category, and purchase intent, the API returns ranked products with evidence scores, confidence bands, and provenance metadata, so recommendations are grounded in real consumer behavior rather than catalog data alone. When observations are too sparse to support a confident recommendation, the API returns an explicit insufficient evidence signal instead of
DataLiveeip155:8453Exactvia cdp
Product-recommendationsCommerce-intelligenceBehavioral-evidenceAgentic-commerceRecommendation-evidence
Calls · 30d
79↑ 14%
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 30 snapshots so far.
$8.30
Verified settled volume
83 settlements proven x402 by their on-chain EIP-3009 marker.
$0.100
Listed price
As published in the catalog. Always read the live 402 before paying.
79
Calls · 30d
Upstream's own call count for this endpoint, not ours.
12
Unique payers · 30d
Last called 2026-09-22 00:50Z
—
Upstream on-chain volume
Reported by the source catalog.
Paid to
0x8c69b13769ca7033145cedbf463a7fe1368537d1The 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.
0.1USDC≈ $0.1 USD
on Base · exact scheme
Pay 0.1 USDC on Base to 0x8c69…537d1. The signed payment is good for 5 minutes.
- Paid to
- 0x8c69…537d1
- USD Coin contract
- 0x8335…02913
- Payment window
- 5 minutes
- As published
- 100000 smallest units
The catalog’s raw entry
[
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"billing": {
"model": "prepaid",
"description": "amount is the price and is charged in full when you pay, and is not returned if delivery fails: this rail settles once and cannot give change. (Exact entries appear only on fixed-price requests - ceiling-priced requests are offered the reserve-and-pay-actual entry instead.)"
},
"version": "2",
"zeroclick": {
"kind": "transaction",
"zcRequestId": "zcreq_ihgRV4EPMRm_Nk2dkIFUc",
"agentPaymentId": "apay_aW5th3yxBJmcl92jLt2kH"
}
},
"payTo": "0x8c69b13769ca7033145cedbf463a7fe1368537d1",
"amount": "100000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
}
]Extensions
{
"terms": {
"info": {
"note": "By paying this challenge, whether directly or through an agent acting on your behalf, you accept the platform's buyer terms of service; an agent's payment and acceptance are attributed to you and bind you as if you had taken them yourself.",
"links": [
{
"url": "https://www.zeroclick.ai/legal/buyer-terms-of-service",
"kind": "platform_terms_of_service"
}
]
},
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"links"
],
"properties": {
"note": {
"type": "string"
},
"links": {
"type": "array",
"items": {
"type": "object",
"required": [
"kind",
"url"
],
"properties": {
"url": {
"type": "string"
},
"kind": {
"enum": [
"terms_of_service",
"privacy_policy",
"additional_terms",
"platform_terms_of_service"
],
"type": "string"
}
}
}
}
}
}
},
"bazaar": {
"info": {
"input": {
"body": {
"limit": 3,
"intent": "senior dog with sensitive stomach",
"category": "pet_nutrition",
"vertical": "companion_animal"
},
"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",
"example": {
"limit": 3,
"intent": "senior dog with sensitive stomach",
"category": "pet_nutrition",
"vertical": "companion_animal"
},
"required": [
"vertical"
],
"properties": {
"limit": {
"type": "integer",
"default": 5,
"example": 3,
"maximum": 10,
"minimum": 1,
"description": "Maximum results to return."
},
"brands": {
"type": "array",
"items": {
"type": "string",
"maxLength": 128
},
"maxItems": 20,
"description": "Restrict results to specific brands."
},
"intent": {
"type": "string",
"example": "senior dog with sensitive stomach",
"maxLength": 512,
"description": "Natural language purchase intent."
},
"category": {
"type": "string",
"example": "pet_nutrition",
"maxLength": 128,
"description": "Product category filter, matched as a substring."
},
"vertical": {
"enum": [
"companion_animal",
"food_beverage",
"personal_care",
"wellness_tech",
"general_retail"
],
"type": "string",
"example": "companion_animal",
"maxLength": 64,
"description": "Category vertical slug."
},
"budget_max": {
"type": "number",
"minimum": 0,
"description": "Maximum price filter in USD."
},
"budget_min": {
"type": "number",
"minimum": 0,
"description": "Minimum price filter in USD."
},
"product_ids": {
"type": "array",
"items": {
"type": "string",
"maxLength": 128
},
"maxItems": 20,
"description": "Restrict results to specific product IDs."
}
}
},
"type": {
"type": "string",
"const": "http"
},
"method": {
"enum": [
"POST",
"PUT",
"PATCH"
],
"type": "string"
},
"bodyType": {
"enum": [
"json",
"form-data",
"text"
],
"type": "string"
}
},
"additionalProperties": false
}
}
}
},
"zeroclick": {
"info": {
"payment": {
"id": "apay_aW5th3yxBJmcl92jLt2kH",
"amountUsd": "0.100000"
},
"service": "powder-evidence",
"requestId": "zcreq_ihgRV4EPMRm_Nk2dkIFUc"
},
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"payment"
],
"properties": {
"agentId": {
"type": "string"
},
"payment": {
"type": "object",
"required": [
"id",
"amountUsd"
],
"properties": {
"id": {
"type": "string"
},
"amountUsd": {
"type": "string"
}
}
},
"service": {
"type": "string"
},
"requestId": {
"type": "string"
}
}
}
}
}Provenance
- Seen in the source catalog
- 2026-09-22 00:50Z
- Last indexed by Roundhouse
- 2026-09-24 08:00Z
- Last enriched (probe, favicon, geo)
- 2026-09-23 01:15Z
- x402 version
- 2
- Max timeout
- 300s
- Liveness probe
- HTTP 405
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 DubbleBlack 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=DubbleBlack' 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://agents.dubbleblack.com/api/agent/evidence, 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.