HALOWERK marktwerk

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://markt.halowerk.com/llms.txt",
  "name": "bridge_flows",
  "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": "4000",
      "scheme": "exact",
      "network": "eip155:8453",
      "maxTimeoutSeconds": 300
    }
  ],
  "pricing": "https://markt.halowerk.com/pricing",
  "summary": "Capital flow into and out of a chain over 24 hours or 7 days: bridged stock now, gross up and down movement, the net with its sign spelled out, the comparison against the preceding period, the split between canonical and third party bridges, and a separation of real flow from mere price movement.",
  "resource": {
    "url": "https://markt.halowerk.com/bridge",
    "iconUrl": "https://markt.halowerk.com/favicon.svg",
    "mimeType": "application/json",
    "description": "Measures how much bridged capital sits on a chain and how that changed. bridged_usd is the sum of canonical and external value: what came in over the canonical bridge of the chain plus what third party bridges brought, while natively issued value is reported apart because it never crossed a bridge. net_usd carries its sign meaning in a field of its own, positive always means capital moved INTO the queried chain. inflow_usd and outflow_usd are the summed positive and negative steps of the sampled",
    "serviceName": "HALOWERK marktwerk"
  },
  "extensions": {
    "bazaar": {
      "info": {
        "input": {
          "body": {
            "chain": "base",
            "period": "24h"
          },
          "type": "http",
          "method": "POST",
          "bodyType": "json"
        }
      },
      "schema": {
        "type": "object",
        "$schema": "https://json-schema.org/draft/2020-12/schema",
        "required": [
          "input"
        ],
        "properties": {
          "input": {
            "type": "object",
            "required": [
              "type",
              "method",
              "bodyType",
              "body"
            ],
            "properties": {
              "body": {
                "type": "object",
                "required": [
                  "chain"
                ],
                "properties": {
                  "chain": {
                    "type": "string",
                    "default": "base",
                    "pattern": "^[a-z0-9_-]{2,32}$",
                    "description": "Chain to measure, as L2BEAT id or slug, for example base, arbitrum, op-mainnet, linea, scroll, starknet. Layer 2 and layer 3 chains only."
                  },
                  "period": {
                    "enum": [
                      "24h",
                      "7d"
                    ],
                    "type": "string",
                    "default": "24h",
                    "description": "Length of the observed window: 24h or 7d."
                  }
                },
                "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": "0.004",
  "description": "Measures how much bridged capital sits on a chain and how that changed. bridged_usd is the sum of canonical and external value: what came in over the canonical bridge of the chain plus what third party bridges brought, while natively issued value is reported apart because it never crossed a bridge. net_usd carries its sign meaning in a field of its own, positive always means capital moved INTO the queried chain. inflow_usd and outflow_usd are the summed positive and negative steps of the sampled series and are therefore a lower bound on gross traffic, stated as such rather than sold as transfer counts. change_vs_previous_period puts the number against the equally long window before it, because a large inflow is only large next to the chain usual week. The endpoint refuses the most common way of being wrong about this figure: a stock denominated in dollars grows when prices rise and nobody bridges at all, so price_effect gives the flow under two stated assumptions, one where none of the basket moves with ether and one where all of it does, and the truth sits between them. Source is the free L2BEAT interface, not a bridge aggregator, because the aggregator route named in the original plan went behind a paywall; the consequence is that individual bridge protocols cannot be ranked and top_bridges is null with the reason attached instead of being filled with a plausible guess.",
  "inputSchema": {
    "type": "object",
    "required": [
      "chain"
    ],
    "properties": {
      "chain": {
        "type": "string",
        "default": "base",
        "pattern": "^[a-z0-9_-]{2,32}$",
        "description": "Chain to measure, as L2BEAT id or slug, for example base, arbitrum, op-mainnet, linea, scroll, starknet. Layer 2 and layer 3 chains only."
      },
      "period": {
        "enum": [
          "24h",
          "7d"
        ],
        "type": "string",
        "default": "24h",
        "description": "Length of the observed window: 24h or 7d."
      }
    },
    "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.",
  "outputSchema": {
    "type": "object",
    "properties": {
      "note": {
        "type": "string"
      },
      "chain": {
        "type": "string"
      },
      "stale": {
        "type": "boolean"
      },
      "method": {
        "type": "object"
      },
      "period": {
        "type": "string"
      },
      "source": {
        "type": "array"
      },
      "net_usd": {
        "type": [
          "number",
          "null"
        ]
      },
      "assessment": {
        "type": [
          "string",
          "null"
        ]
      },
      "inflow_usd": {
        "type": [
          "number",
          "null"
        ]
      },
      "bridged_now": {
        "type": "object"
      },
      "composition": {
        "type": "array"
      },
      "outflow_usd": {
        "type": [
          "number",
          "null"
        ]
      },
      "top_bridges": {
        "type": [
          "array",
          "null"
        ]
      },
      "price_effect": {
        "type": [
          "object",
          "null"
        ]
      },
      "fetched_at_iso": {
        "type": "string"
      },
      "stale_as_of_iso": {
        "type": [
          "string",
          "null"
        ]
      },
      "thresholds_used": {
        "type": "object"
      },
      "net_sign_meaning": {
        "type": "string"
      },
      "change_vs_previous_period": {
        "type": [
          "object",
          "null"
        ]
      }
    }
  },
  "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.

[
  {
    "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": "4000",
    "scheme": "exact",
    "network": "eip155:8453",
    "maxTimeoutSeconds": 300
  }
]

Extensions

{
  "bazaar": {
    "info": {
      "input": {
        "body": {
          "chain": "base",
          "period": "24h"
        },
        "type": "http",
        "method": "POST",
        "bodyType": "json"
      }
    },
    "schema": {
      "type": "object",
      "$schema": "https://json-schema.org/draft/2020-12/schema",
      "required": [
        "input"
      ],
      "properties": {
        "input": {
          "type": "object",
          "required": [
            "type",
            "method",
            "bodyType",
            "body"
          ],
          "properties": {
            "body": {
              "type": "object",
              "required": [
                "chain"
              ],
              "properties": {
                "chain": {
                  "type": "string",
                  "default": "base",
                  "pattern": "^[a-z0-9_-]{2,32}$",
                  "description": "Chain to measure, as L2BEAT id or slug, for example base, arbitrum, op-mainnet, linea, scroll, starknet. Layer 2 and layer 3 chains only."
                },
                "period": {
                  "enum": [
                    "24h",
                    "7d"
                  ],
                  "type": "string",
                  "default": "24h",
                  "description": "Length of the observed window: 24h or 7d."
                }
              },
              "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

2026-08-12 04:28Z

Last indexed by Roundhouse

2026-09-11 04:30Z

Last enriched (probe, favicon, geo)

2026-09-21 07:45Z

x402 version

2

Max timeout

300s

Liveness probe

HTTP 402