19zyki4y.nx.link

No description published for this endpoint.

OtherLiveeip155:8453Exactvia facilitator:thirdweb

https://19zyki4y.nx.link/v1/wallets/{address}/balance

Activity

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Nothing indexed for this service or its provider yet. Not a claim that it is unused — only that we hold no record.

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Verified settled volume

0 settlements proven x402 by their on-chain EIP-3009 marker.

$0.00

Listed price

As published in the catalog. Always read the live 402 before paying.

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Calls · 30d

Upstream's own call count for this endpoint, not ours.

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Unique payers · 30d

Never called

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Upstream on-chain volume

Reported by the source catalog.

Paid to

0xbEff58504eB09E3Bb3edC68e81250c71D3f8c0f5

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": "37b13a1e-1adf-416a-af72-4a96b60963e1",
        "primaryType": "TransferWithAuthorization",
        "recipientAddress": "0xbEff58504eB09E3Bb3edC68e81250c71D3f8c0f5",
        "facilitatorAddress": "0x758D2532FF6A304D1A0c2FdF46264590E4Ef0637"
      },
      "payTo": "0x758D2532FF6A304D1A0c2FdF46264590E4Ef0637",
      "scheme": "exact",
      "network": "eip155:8453",
      "mimeType": "application/json",
      "resource": "https://api.thirdweb.com/v1/wallets/{address}/balance",
      "description": "thirdweb API: getWalletBalance - Get Balance",
      "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≈ $ USD

on Base · exact scheme

That figure is in the token’s smallest units. Roundhouse does not hold this contract’s decimals, so it is shown as published rather than converted.

Paid to: 0xbEff…8c0f5
USD Coin contract: 0x8335…02913
Payment window: 24 hours
Buys: thirdweb API https://api.thirdweb.com - GET Get Balance
Returns: application/json

The catalog’s raw entry

[
  {
    "asset": "0x833589fcd6edb6e08f4c7c32d4f71b54bda02913",
    "payTo": "0xbEff58504eB09E3Bb3edC68e81250c71D3f8c0f5",
    "scheme": "exact",
    "network": "eip155:8453",
    "mimeType": "application/json",
    "resource": "https://19zyki4y.nx.link/v1/wallets/{address}/balance",
    "description": "thirdweb API https://api.thirdweb.com - GET Get Balance",
    "outputSchema": {
      "responses": {
        "200": {
          "content": {
            "application/json": {
              "schema": {
                "type": "object",
                "required": [
                  "result"
                ],
                "properties": {
                  "result": {
                    "type": "array",
                    "items": {
                      "type": "object",
                      "required": [
                        "chainId",
                        "decimals",
                        "displayValue",
                        "name",
                        "symbol",
                        "tokenAddress",
                        "value"
                      ],
                      "properties": {
                        "name": {
                          "type": "string",
                          "description": "The token name (e.g., 'Ether', 'USD Coin')"
                        },
                        "value": {
                          "type": "string",
                          "description": "Raw balance value as string in smallest unit (wei for ETH, etc.)"
                        },
                        "symbol": {
                          "type": "string",
                          "description": "The token symbol (e.g., 'ETH', 'USDC')"
                        },
                        "chainId": {
                          "type": "number",
                          "description": "The blockchain network ID"
                        },
                        "decimals": {
                          "type": "number",
                          "description": "Number of decimal places for the token"
                        },
                        "displayValue": {
                          "type": "string",
                          "description": "Human-readable balance formatted with appropriate decimal places"
                        },
                        "tokenAddress": {
                          "type": "string",
                          "description": "The token contract address. Returns zero address (0x0...0) for native tokens."
                        }
                      }
                    }
                  }
                }
              }
            }
          },
          "description": "Wallet native balances retrieved successfully. Returns detailed native token balance information for each chain including token metadata and formatted values."
        },
        "400": {
          "description": "Invalid request parameters. This occurs when the wallet address format is invalid, chainId array is empty or exceeds the maximum limit of 50, or chain IDs are invalid."
        },
        "401": {
          "description": "Authentication required. The request must include a valid `x-client-id` header for frontend usage or `x-secret-key` for backend usage."
        },
        "500": {
          "description": "Internal server error. This may occur due to blockchain connectivity issues, RPC service unavailability, or unexpected server errors."
        }
      },
      "parameters": [
        {
          "in": "path",
          "name": "address",
          "schema": {
            "type": "string",
            "description": "A valid Ethereum address (0x-prefixed hex string) or ENS name (e.g., vitalik.eth)."
          },
          "required": true,
          "description": "A valid Ethereum address (0x-prefixed hex string) or ENS name (e.g., vitalik.eth)."
        },
        {
          "in": "query",
          "name": "chainId",
          "schema": {
            "type": "array",
            "items": {
              "type": "integer"
            },
            "maxItems": 50,
            "minItems": 1,
            "description": "Chain ID(s) to request balance data for. You can specify multiple chain IDs by repeating the parameter, up to a maximum of 50. Example: ?chainId=1&chainId=137"
          },
          "required": true,
          "description": "Chain ID(s) to request balance data for. You can specify multiple chain IDs by repeating the parameter, up to a maximum of 50. Example: ?chainId=1&chainId=137"
        },
        {
          "in": "query",
          "name": "tokenAddress",
          "schema": {
            "type": "string",
            "description": "The token contract address. Omit for native token (ETH, MATIC, etc.)."
          },
          "required": false,
          "description": "The token contract address. Omit for native token (ETH, MATIC, etc.)."
        }
      ]
    },
    "maxAmountRequired": "0.01",
    "maxTimeoutSeconds": 86400
  }
]

Provenance

Seen in the source catalog: 2025-11-04 16:21Z
Last indexed by Roundhouse: 2026-09-24 19:15Z
Last enriched (probe, favicon, geo): 2026-09-14 17:46Z
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 19zyki4y.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=19zyki4y.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://19zyki4y.nx.link/v1/wallets/{address}/balance, 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.