blackhull
blackhull token check: measured facts about one Base token, live from the chain. Measured by Blackhull from public data; every finding carries its evidence and can be disputed free at /dispute. Try it free: add ?sample=1.
The wallet the 402 directs payment to. Its whole payment record — every payer, every chain — is on the merchant page.
Asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913
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.
{
"error": "X-PAYMENT (v1) or PAYMENT-SIGNATURE (v2) header is required",
"accepts": [
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x1c0B8053c3Ba5b2FF6079c8437F0Aa72d2be0B9e",
"scheme": "exact",
"network": "base",
"mimeType": "application/json",
"resource": "https://blackhullsystems.com/check/token?address=0x833589fcd6edb6e08f4c7c32d4f71b54bda02913",
"description": "blackhull token check: measured facts about one Base token, live from the chain",
"maxAmountRequired": "10000",
"maxTimeoutSeconds": 120
}
],
"x402Version": 1
}Accepts
The payment requirements as published to the catalog. Read the live 402 before paying — a price here is a claim, not a quote.
Pay 0.01 USDC on Base to 0x1c0B…e0B9e. The signed payment is good for 2 minutes.
- Paid to
- 0x1c0B…e0B9e
- USD Coin contract
- 0x8335…02913
- Payment window
- 2 minutes
- As published
- 10000 smallest units
The catalog’s raw entry
[
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x1c0B8053c3Ba5b2FF6079c8437F0Aa72d2be0B9e",
"amount": "10000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 120
}
]Extensions
{
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"address": "0x833589fcd6edb6e08f4c7c32d4f71b54bda02913"
}
},
"output": {
"type": "json",
"schema": {
"type": "object",
"properties": {
"codes": {
"type": "array",
"items": {
"type": "string"
}
},
"checks": {
"type": "object",
"properties": {
"erc20": {
"type": "object",
"properties": {
"value": {
"type": "boolean"
},
"evidence": {
"type": "object",
"properties": {
"symbol": {
"type": "string"
},
"decimals": {
"type": "number"
}
}
}
}
}
}
},
"address": {
"type": "string"
}
}
},
"example": {
"codes": [
"OWNER_ACTIVE",
"CAN_MINT",
"UPGRADEABLE",
"LIQUIDITY"
],
"checks": {
"erc20": {
"value": true,
"evidence": {
"symbol": "USDC",
"decimals": 6
}
}
},
"address": "0x833589fcd6edb6e08f4c7c32d4f71b54bda02913"
}
}
},
"schema": {
"type": "object",
"required": [
"input"
],
"properties": {
"input": {
"type": "object",
"required": [
"type",
"method"
],
"properties": {
"type": {
"const": "http"
},
"method": {
"const": "GET"
},
"queryParams": {
"type": "object",
"required": [
"address"
],
"properties": {
"address": {
"type": "string",
"description": "the token contract address on Base (0x + 40 hex)"
}
}
}
}
},
"output": {
"type": "object",
"properties": {
"type": {
"const": "json"
},
"schema": {
"type": "object"
},
"example": {
"type": "object"
}
}
}
}
}
}
}Provenance
- Seen in the source catalog
- 2026-11-05 17:05Z
- Last indexed by Roundhouse
- 2026-11-08 12:30Z
- Last enriched (probe, favicon, geo)
- 2026-11-02 14:46Z
- x402 version
- 2
- Max timeout
- 120s
- 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. 11 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 blackhull 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=blackhull' 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://blackhullsystems.com/check/token, 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.