Index onlineMerchant portal
Api Endpoint

FastPath Bitcoin API

Unified Bitcoin transaction analysis: fee verdict, mempool state, RBF bump plan, and Core v31 template check.

Open interactive test console

Offering

Provider
api.nativebtc.org
Method
POST
Offering type
Api Endpoint
Transport type
http
Category
Blockchain And Crypto
Delivery
Not provided
Pricing model
Not provided
x402 version
2

Endpoint context

URL
https://api.nativebtc.org/v1/bitcoin/insight
MIME type
Not provided
First seen
2026-10-16T01:59:37.852Z
Last seen
Tags
Bitcoin, insight, Fees, rbf, core-v31

Website

Payment pricing

x402 payment terms are the authoritative price for calling this endpoint.

Payment option 1
0.01 USDC
Atomic price: 10000 · Network: eip155:8453 · Asset: USDC · Scheme: exact
Payment option 2
0.01 USDC
Atomic price: 10000 · Network: eip155:137 · Asset: USDC · Scheme: exact
Payment option 3
0.01 USDC
Atomic price: 10000 · Network: eip155:42161 · Asset: USDC · Scheme: exact
Payment option 4
0.01 USDC
Atomic price: 10000 · Network: eip155:480 · Asset: USDC · Scheme: exact
Raw x402 terms
[
  {
    "scheme": "exact",
    "network": "eip155:8453",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "amount": "10000",
    "payTo": "0x0300E73759B357ceeE5A248d1801eCb8abf7A1d4"
  },
  {
    "scheme": "exact",
    "network": "eip155:137",
    "asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
    "amount": "10000",
    "payTo": "0x0300E73759B357ceeE5A248d1801eCb8abf7A1d4"
  },
  {
    "scheme": "exact",
    "network": "eip155:42161",
    "asset": "0xaf88d065e77c8cC2239327C5EDb3A432268e5831",
    "amount": "10000",
    "payTo": "0x0300E73759B357ceeE5A248d1801eCb8abf7A1d4"
  },
  {
    "scheme": "exact",
    "network": "eip155:480",
    "asset": "0x79A02482A880bCE3F13e09Da970dC34db4CD24d1",
    "amount": "10000",
    "payTo": "0x0300E73759B357ceeE5A248d1801eCb8abf7A1d4"
  }
]

Observed health

Status
Healthy
Latest latency
220 ms
Average latency
948 ms
HTTP status
200
Last checked
Reachability
92.9% over 14 checks

Latency is measured to the first response headers. A reachable result does not verify response accuracy or merchant identity.

Input schema

{
  "additionalProperties": false,
  "properties": {
    "body": {
      "properties": {
        "action": {
          "description": "Analyze the transaction or relay a user-signed replacement transaction.",
          "enum": [
            "analyze",
            "broadcast_signed_replacement"
          ],
          "type": "string"
        },
        "address": {
          "description": "Bitcoin address such as bc1q..., bc1p..., 1..., or 3....",
          "type": "string"
        },
        "signedReplacementHex": {
          "description": "User-signed raw Bitcoin replacement transaction hex. FastPath relays only; it never signs or holds funds.",
          "type": "string"
        },
        "targetBlocks": {
          "description": "Desired confirmation target in blocks.",
          "minimum": 1,
          "type": "number"
        },
        "txid": {
          "description": "Bitcoin transaction ID as 64 lowercase or uppercase hex characters.",
          "pattern": "^[0-9a-fA-F]{64}$",
          "type": "string"
        }
      },
      "required": [
        "txid"
      ],
      "type": "object"
    },
    "bodyType": {
      "enum": [
        "json",
        "form-data",
        "text"
      ],
      "type": "string"
    },
    "method": {
      "enum": [
        "POST"
      ],
      "type": "string"
    },
    "type": {
      "const": "http",
      "type": "string"
    }
  },
  "required": [
    "type",
    "method",
    "bodyType",
    "body"
  ],
  "type": "object"
}

Output schema

{
  "properties": {
    "example": {
      "type": "object"
    },
    "type": {
      "type": "string"
    }
  },
  "required": [
    "type"
  ],
  "type": "object"
}