Roundhouse AI

3hcvxvrh.nx.link

No description published for this endpoint.

OtherLiveeip155:8453Exactvia facilitator:thirdweb
https://3hcvxvrh.nx.link/getLatestCheckpoint
Activity
—
Nothing indexed for this service or its provider yet. Not a claim that it is unused — only that we hold no record.
$0.66
Verified settled volume
66 settlements proven x402 by their on-chain EIP-3009 marker.
$0.010
Listed price
As published in the catalog. Always read the live 402 before paying.
—
Calls · 30d
Upstream's own call count for this endpoint, not ours.
—
Unique payers · 30d
Never called
—
Upstream on-chain volume
Reported by the source catalog.
Paid to
0xcBBdeCc1287aE7492D75318796B5B3F8cC464694

The 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.

{
  "error": "Payment header is required",
  "accepts": [
    {
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "extra": {
        "name": "USD Coin",
        "version": "2",
        "nexusPathId": "01f5dae1-61f9-4b99-99c9-d54de8eb3fb6",
        "primaryType": "TransferWithAuthorization",
        "recipientAddress": "0xcBBdeCc1287aE7492D75318796B5B3F8cC464694",
        "facilitatorAddress": "0x758D2532FF6A304D1A0c2FdF46264590E4Ef0637"
      },
      "payTo": "0x758D2532FF6A304D1A0c2FdF46264590E4Ef0637",
      "scheme": "exact",
      "network": "eip155:8453",
      "mimeType": "application/json",
      "resource": "https://api.witness.co/getLatestCheckpoint",
      "description": "Witness API: getLatestCheckpoint - Returns the latest onchain checkpoint.",
      "outputSchema": {
        "input": {
          "type": "http",
          "method": "GET",
          "discoverable": true
        }
      },
      "maxAmountRequired": "10000",
      "maxTimeoutSeconds": 86400
    }
  ],
  "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.

0.01USDC≈ $0.01 USD
on Base · exact scheme

Pay 0.01 USDC on Base to 0xcBBd…64694. The signed payment is good for 24 hours.

Paid to
0xcBBd…64694
USD Coin contract
0x8335…02913
Payment window
24 hours
As published
10000 smallest units
Buys
Witness API https://api.witness.co - GET Returns the latest onchain checkpoint.
Returns
application/json
The catalog’s raw entry
[
  {
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "payTo": "0xcBBdeCc1287aE7492D75318796B5B3F8cC464694",
    "scheme": "exact",
    "network": "eip155:8453",
    "mimeType": "application/json",
    "resource": "https://3hcvxvrh.nx.link/getLatestCheckpoint",
    "description": "Witness API https://api.witness.co - GET Returns the latest onchain checkpoint.",
    "outputSchema": {
      "responses": {
        "200": {
          "content": {
            "application/json": {
              "schema": {
                "type": "object",
                "required": [
                  "txHash",
                  "blockNumber",
                  "blockHash",
                  "chainId",
                  "timestamp",
                  "rootHash",
                  "treeSize",
                  "status"
                ],
                "properties": {
                  "status": {
                    "enum": [
                      "included",
                      "pending",
                      "finalized"
                    ],
                    "type": "string",
                    "description": "The status of the checkpoint (deprecated)"
                  },
                  "txHash": {
                    "type": "string",
                    "description": "Transaction hash of the checkpoint"
                  },
                  "chainId": {
                    "type": "number",
                    "description": "The chain ID the checkpoint corresponds to"
                  },
                  "rootHash": {
                    "type": "string",
                    "description": "Root hash of the checkpoint"
                  },
                  "treeSize": {
                    "anyOf": [
                      {
                        "type": "string"
                      },
                      {
                        "type": "string"
                      }
                    ],
                    "description": "The size of the tree for the given checkpoint"
                  },
                  "blockHash": {
                    "type": "string",
                    "description": "The hash of the block the checkpoint was included in"
                  },
                  "timestamp": {
                    "anyOf": [
                      {
                        "type": "string"
                      },
                      {
                        "type": "string"
                      },
                      {
                        "type": "string"
                      }
                    ],
                    "description": "The timestamp in epoch seconds"
                  },
                  "blockNumber": {
                    "anyOf": [
                      {
                        "type": "string"
                      },
                      {
                        "type": "string"
                      }
                    ],
                    "description": "The block number the checkpoint was included in"
                  }
                },
                "additionalProperties": false
              },
              "example": {
                "status": "included",
                "txHash": "0x97e78047a64a1bb484d69e3093ec34d9a0d13f682496bffa492626909df5efd3",
                "chainId": 8453,
                "rootHash": "0x97e78047a64a1bb484d69e3093ec34d9a0d13f682496bffa492626909df5efd3",
                "treeSize": "123456789",
                "blockHash": "0x97e78047a64a1bb484d69e3093ec34d9a0d13f682496bffa492626909df5efd3",
                "timestamp": "1698262805",
                "blockNumber": "123456789"
              }
            }
          },
          "description": "Successful response"
        },
        "default": {
          "$ref": "#/components/responses/error"
        }
      },
      "parameters": [
        {
          "in": "query",
          "name": "chainId",
          "schema": {
            "anyOf": [
              {
                "not": {}
              },
              {
                "type": "number"
              }
            ],
            "default": 8453
          },
          "example": 8453,
          "required": false,
          "description": "Optional chain ID of the checkpoint; defaults to 8453"
        }
      ]
    },
    "maxAmountRequired": "10000",
    "maxTimeoutSeconds": 86400
  }
]

Provenance

Seen in the source catalog
2025-10-15 20:37Z
Last indexed by Roundhouse
2026-09-25 00:45Z
Last enriched (probe, favicon, geo)
2026-09-20 23:45Z
x402 version
1
Max timeout
86400s
Liveness probe
HTTP 402
Report

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

Nothing indexed for this service or its provider yet. Not a claim that it is unused — only that we hold no record. Verified volume counts only settlements with an on-chain EIP-3009 marker.

Open skill.md
Show the prompt
Using Roundhouse, look up the x402 service 3hcvxvrh.nx.link 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=3hcvxvrh.nx.link'
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://3hcvxvrh.nx.link/getLatestCheckpoint, 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.