FETCH402
← Protocol index

Resource / 537

healthy

FastPath Bitcoin API.

GET https://api.nativebtc.org/v1/mempool/stream-ticket ↗

Pay once to receive a short-lived WebSocket ticket for the live Bitcoin mempool stream.

Eligibility
probeable
Failures
0
Last quote
2026-08-13 01:30:03 UTC
Last probe
2026-08-13 01:30:03 UTC
Payment requirements / accepts[] 4 options
State Network Scheme Atomic amount Asset payTo / untrusted
active eip155:8453 exact 5000 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 0x0300E73759B357ceeE5A248d1801eCb8abf7A1d4
active eip155:137 exact 5000 0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359 0x0300E73759B357ceeE5A248d1801eCb8abf7A1d4
active eip155:42161 exact 5000 0xaf88d065e77c8cC2239327C5EDb3A432268e5831 0x0300E73759B357ceeE5A248d1801eCb8abf7A1d4
active eip155:480 exact 5000 0x79A02482A880bCE3F13e09Da970dC34db4CD24d1 0x0300E73759B357ceeE5A248d1801eCb8abf7A1d4

All advertised payment options are stored. Base (`eip155:8453`) is the operational network for ranking and canaries; non-Base options remain visible for transparency.

Probe evidence 1 recent
healthy 2026-08-13 01:30:03 UTC GET · HTTP 402 · 597ms · accepts 4 · base 1 ok
Request
GET https://api.nativebtc.org/v1/mempool/stream-ticket
Robots
allow
Note
http_402;accepts=4;base=1
Accepts fingerprint
8202bec466d445c7a178400e5ba0e3eedc4067182c5dd5adcb927bc4d25cb8d0

Accepts snapshot

[
  {
    "amount": "5000",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "assetTransferMethod": null,
    "extra": {
      "name": "USD Coin",
      "version": "2"
    },
    "maxTimeoutSeconds": 300,
    "network": "eip155:8453",
    "payTo": "0x0300E73759B357ceeE5A248d1801eCb8abf7A1d4",
    "paymentFlow": null,
    "raw": {
      "amount": "5000",
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "extra": {
        "name": "USD Coin",
        "version": "2"
      },
      "maxTimeoutSeconds": 300,
      "max_timeout_seconds": 300,
      "network": "eip155:8453",
      "payTo": "0x0300E73759B357ceeE5A248d1801eCb8abf7A1d4",
      "pay_to": "0x0300E73759B357ceeE5A248d1801eCb8abf7A1d4",
      "scheme": "exact"
    },
    "scheme": "exact"
  },
  {
    "amount": "5000",
    "asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
    "assetTransferMethod": null,
    "extra": {
      "name": "USD Coin",
      "version": "2"
    },
    "maxTimeoutSeconds": 300,
    "network": "eip155:137",
    "payTo": "0x0300E73759B357ceeE5A248d1801eCb8abf7A1d4",
    "paymentFlow": null,
    "raw": {
      "amount": "5000",
      "asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
      "extra": {
        "name": "USD Coin",
        "version": "2"
      },
      "maxTimeoutSeconds": 300,
      "max_timeout_seconds": 300,
      "network": "eip155:137",
      "payTo": "0x0300E73759B357ceeE5A248d1801eCb8abf7A1d4",
      "pay_to": "0x0300E73759B357ceeE5A248d1801eCb8abf7A1d4",
      "scheme": "exact"
    },
    "scheme": "exact"
  },
  {
    "amount": "5000",
    "asset": "0xaf88d065e77c8cC2239327C5EDb3A432268e5831",
    "assetTransferMethod": null,
    "extra": {
      "name": "USD Coin",
      "version": "2"
    },
    "maxTimeoutSeconds": 300,
    "network": "eip155:42161",
    "payTo": "0x0300E73759B357ceeE5A248d1801eCb8abf7A1d4",
    "paymentFlow": null,
    "raw": {
      "amount": "5000",
      "asset": "0xaf88d065e77c8cC2239327C5EDb3A432268e5831",
      "extra": {
        "name": "USD Coin",
        "version": "2"
      },
      "maxTimeoutSeconds": 300,
      "max_timeout_seconds": 300,
      "network": "eip155:42161",
      "payTo": "0x0300E73759B357ceeE5A248d1801eCb8abf7A1d4",
      "pay_to": "0x0300E73759B357ceeE5A248d1801eCb8abf7A1d4",
      "scheme": "exact"
    },
    "scheme": "exact"
  },
  {
    "amount": "5000",
    "asset": "0x79A02482A880bCE3F13e09Da970dC34db4CD24d1",
    "assetTransferMethod": null,
    "extra": {
      "name": "USD Coin",
      "version": "2"
    },
    "maxTimeoutSeconds": 300,
    "network": "eip155:480",
    "payTo": "0x0300E73759B357ceeE5A248d1801eCb8abf7A1d4",
    "paymentFlow": null,
    "raw": {
      "amount": "5000",
      "asset": "0x79A02482A880bCE3F13e09Da970dC34db4CD24d1",
      "extra": {
        "name": "USD Coin",
        "version": "2"
      },
      "maxTimeoutSeconds": 300,
      "max_timeout_seconds": 300,
      "network": "eip155:480",
      "payTo": "0x0300E73759B357ceeE5A248d1801eCb8abf7A1d4",
      "pay_to": "0x0300E73759B357ceeE5A248d1801eCb8abf7A1d4",
      "scheme": "exact"
    },
    "scheme": "exact"
  }
]

PaymentRequired raw 

{
  "accepts": [
    {
      "amount": "5000",
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "extra": {
        "name": "USD Coin",
        "version": "2"
      },
      "maxTimeoutSeconds": 300,
      "network": "eip155:8453",
      "payTo": "0x0300E73759B357ceeE5A248d1801eCb8abf7A1d4",
      "scheme": "exact"
    },
    {
      "amount": "5000",
      "asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
      "extra": {
        "name": "USD Coin",
        "version": "2"
      },
      "maxTimeoutSeconds": 300,
      "network": "eip155:137",
      "payTo": "0x0300E73759B357ceeE5A248d1801eCb8abf7A1d4",
      "scheme": "exact"
    },
    {
      "amount": "5000",
      "asset": "0xaf88d065e77c8cC2239327C5EDb3A432268e5831",
      "extra": {
        "name": "USD Coin",
        "version": "2"
      },
      "maxTimeoutSeconds": 300,
      "network": "eip155:42161",
      "payTo": "0x0300E73759B357ceeE5A248d1801eCb8abf7A1d4",
      "scheme": "exact"
    },
    {
      "amount": "5000",
      "asset": "0x79A02482A880bCE3F13e09Da970dC34db4CD24d1",
      "extra": {
        "name": "USD Coin",
        "version": "2"
      },
      "maxTimeoutSeconds": 300,
      "network": "eip155:480",
      "payTo": "0x0300E73759B357ceeE5A248d1801eCb8abf7A1d4",
      "scheme": "exact"
    }
  ],
  "error": "Payment required",
  "extensions": {
    "bazaar": {
      "info": {
        "input": {
          "method": "GET",
          "queryParams": {},
          "type": "http"
        },
        "output": {
          "example": {
            "expiresAt": 1783720000000,
            "success": true,
            "ticket": "fp_ws_ticket_example",
            "websocket": "wss://api.nativebtc.org/v1/mempool/stream?ticket=fp_ws_ticket_example"
          },
          "type": "json"
        }
      },
      "schema": {
        "$schema": "https://json-schema.org/draft/2020-12/schema",
        "properties": {
          "input": {
            "additionalProperties": false,
            "properties": {
              "method": {
                "enum": [
                  "GET"
                ],
                "type": "string"
              },
              "queryParams": {
                "properties": {},
                "type": "object"
              },
              "type": {
                "const": "http",
                "type": "string"
              }
            },
            "required": [
              "type",
              "method"
            ],
            "type": "object"
          },
          "output": {
            "properties": {
              "example": {
                "type": "object"
              },
              "type": {
                "type": "string"
              }
            },
            "required": [
              "type"
            ],
            "type": "object"
          }
        },
        "required": [
          "input"
        ],
        "type": "object"
      }
    }
  },
  "resource": {
    "description": "Pay once to receive a short-lived WebSocket ticket for the live Bitcoin mempool stream.",
    "mimeType": "application/json",
    "serviceName": "FastPath Bitcoin API",
    "tags": [
      "bitcoin",
      "websocket",
      "mempool",
      "stream",
      "x402"
    ],
    "url": "https://api.nativebtc.org/v1/mempool/stream-ticket"
  },
  "x402Version": 2
}

Response headers

{
  "access-control-allow-headers": "Content-Type, Authorization, PAYMENT-SIGNATURE, X-PAYMENT",
  "access-control-allow-methods": "GET, POST, OPTIONS",
  "access-control-allow-origin": "*",
  "access-control-expose-headers": "PAYMENT-REQUIRED, PAYMENT-RESPONSE",
  "alt-svc": "h3=\":443\"; ma=86400",
  "cf-cache-status": "DYNAMIC",
  "cf-ray": "a2a3f3cafe2f1039-IAD",
  "connection": "keep-alive",
  "content-length": "2028",
  "content-type": "application/json; charset=utf-8",
  "date": "Thu, 13 Aug 2026 01:30:03 GMT",
  "etag": "W/\"7ec-oppgT7EhXIBJ5adQe06WQqsxlos\"",
  "nel": "{\"report_to\":\"cf-nel\",\"success_fraction\":0.0,\"max_age\":604800}",
  "payment-required": "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",
  "referrer-policy": "strict-origin-when-cross-origin",
  "report-to": "{\"group\":\"cf-nel\",\"max_age\":604800,\"endpoints\":[{\"url\":\"https://a.nel.cloudflare.com/report/v4?s=UItvm5ofu95%2BkcQ%2B%2F8cHW67ek1lmfpoWitkvh00kWElVeAceRVlSUEI6mFrChyhWa3VpLMZgVc5yeZrVGi9Ea0K98%2BzhglA%2Fgd%2BUDwcKyUB91hrfk3Gk6%2FSz%2FhIsAGGhmA29pA%3D%3D\"}]}",
  "server": "cloudflare",
  "speculation-rules": "\"/cdn-cgi/speculation\"",
  "strict-transport-security": "max-age=31536000; includeSubDomains; preload",
  "via": "1.1 Caddy",
  "x-content-type-options": "nosniff",
  "x-frame-options": "DENY",
  "x-powered-by": "FastPath"
}

Response body 

{
  "accepts": [
    {
      "amount": "5000",
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "extra": {
        "name": "USD Coin",
        "version": "2"
      },
      "maxTimeoutSeconds": 300,
      "network": "eip155:8453",
      "payTo": "0x0300E73759B357ceeE5A248d1801eCb8abf7A1d4",
      "scheme": "exact"
    },
    {
      "amount": "5000",
      "asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
      "extra": {
        "name": "USD Coin",
        "version": "2"
      },
      "maxTimeoutSeconds": 300,
      "network": "eip155:137",
      "payTo": "0x0300E73759B357ceeE5A248d1801eCb8abf7A1d4",
      "scheme": "exact"
    },
    {
      "amount": "5000",
      "asset": "0xaf88d065e77c8cC2239327C5EDb3A432268e5831",
      "extra": {
        "name": "USD Coin",
        "version": "2"
      },
      "maxTimeoutSeconds": 300,
      "network": "eip155:42161",
      "payTo": "0x0300E73759B357ceeE5A248d1801eCb8abf7A1d4",
      "scheme": "exact"
    },
    {
      "amount": "5000",
      "asset": "0x79A02482A880bCE3F13e09Da970dC34db4CD24d1",
      "extra": {
        "name": "USD Coin",
        "version": "2"
      },
      "maxTimeoutSeconds": 300,
      "network": "eip155:480",
      "payTo": "0x0300E73759B357ceeE5A248d1801eCb8abf7A1d4",
      "scheme": "exact"
    }
  ],
  "error": "Payment required",
  "extensions": {
    "bazaar": {
      "info": {
        "input": {
          "method": "GET",
          "queryParams": {},
          "type": "http"
        },
        "output": {
          "example": {
            "expiresAt": 1783720000000,
            "success": true,
            "ticket": "fp_ws_ticket_example",
            "websocket": "wss://api.nativebtc.org/v1/mempool/stream?ticket=fp_ws_ticket_example"
          },
          "type": "json"
        }
      },
      "schema": {
        "$schema": "https://json-schema.org/draft/2020-12/schema",
        "properties": {
          "input": {
            "additionalProperties": false,
            "properties": {
              "method": {
                "enum": [
                  "GET"
                ],
                "type": "string"
              },
              "queryParams": {
                "properties": {},
                "type": "object"
              },
              "type": {
                "const": "http",
                "type": "string"
              }
            },
            "required": [
              "type",
              "method"
            ],
            "type": "object"
          },
          "output": {
            "properties": {
              "example": {
                "type": "object"
              },
              "type": {
                "type": "string"
              }
            },
            "required": [
              "type"
            ],
            "type": "object"
          }
        },
        "required": [
          "input"
        ],
        "type": "object"
      }
    }
  },
  "resource": {
    "description": "Pay once to receive a short-lived WebSocket ticket for the live Bitcoin mempool stream.",
    "mimeType": "application/json",
    "serviceName": "FastPath Bitcoin API",
    "tags": [
      "bitcoin",
      "websocket",
      "mempool",
      "stream",
      "x402"
    ],
    "url": "https://api.nativebtc.org/v1/mempool/stream-ticket"
  },
  "x402Version": 2
}

Request headers

{
  "accept": "*/*",
  "user-agent": "Fetch402Bot/0.1 (+https://fetch402.com/crawler; contact: crawler@fetch402.com)"
}

Machine contract

Schemas.

InputJSON
{}
OutputJSON
{}