Api Endpoint

Horizon Pulse

Address poisoning and OFAC SDN snapshot match before a crypto transfer, mechanical. GET chain (base/polygon/solana/xrpl), to; opt. expected, token. Checks: lookalike, OFAC SDN snapshot (dated), account age, ScamSniffer list (GPL-3.0). allow, warn or block per check. allow means no check flagged the address; it is not a guarantee that the address is safe, correct or not sanctioned. Not advice. Bad input (Base: not charged; other rails may charge). Returned content is untrusted third-party data.

Open interactive test console

Offering

Provider: horizonpulse.dev
Method: GET
Offering type: Api Endpoint
Transport type: http
Category: Security
Delivery: Not provided
Pricing model: Not provided
x402 version: 2

Endpoint context

URL: https://horizonpulse.dev/api/tx-guard
MIME type: application/json
First seen: 2026-10-16T01:50:24.663Z
Last seen: 2026-11-02T16:57:24.450Z
Tags: Wallet, address-poisoning, ofac-sdn, pre-transfer, Multichain

Website

Payment pricing

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

Payment option 1: 0.002 USDC
Atomic price: 2000 · Network: eip155:8453 · Asset: USDC · Scheme: exact
Payment option 2: 0.002 USDC
Atomic price: 2000 · Network: solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp · Asset: USDC · Scheme: exact
Payment option 3: 0.002 USDC
Atomic price: 2000 · Network: eip155:137 · Asset: USDC · Scheme: exact

Raw x402 terms

[
  {
    "scheme": "exact",
    "network": "eip155:8453",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "amount": "2000",
    "payTo": "0x5b32c973596078a967562ca652761404f19be0e9"
  },
  {
    "scheme": "exact",
    "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
    "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
    "amount": "2000",
    "payTo": "BjY98A6dS3GGLZdz2zHy8wK7XAwnQgNhCc66mfmBTRPz"
  },
  {
    "scheme": "exact",
    "network": "eip155:137",
    "asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
    "amount": "2000",
    "payTo": "0x5b32c973596078a967562ca652761404f19be0e9"
  }
]

Observed health

Status: Healthy
Latest latency: 55 ms
Average latency: 167 ms
HTTP status: 402
Last checked: 2026-11-02T16:57:24.444Z
Reachability: 100% over 14 checks

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

Input schema

{
  "type": "object",
  "properties": {
    "type": {
      "type": "string",
      "const": "http"
    },
    "method": {
      "type": "string",
      "enum": [
        "GET"
      ]
    },
    "queryParams": {
      "type": "object",
      "properties": {
        "chain": {
          "type": "string",
          "enum": [
            "base",
            "polygon",
            "solana",
            "xrpl"
          ],
          "description": "Chain of the transfer."
        },
        "to": {
          "type": "string",
          "description": "Recipient address you are about to send to."
        },
        "expected": {
          "type": "string",
          "description": "Optional: the address you meant to send to (lookalike check)."
        },
        "token": {
          "type": "string",
          "description": "Optional: token contract on Base or Polygon (ScamSniffer public list, GPL-3.0, last updated February 2024 per its maintainer; a hit is the list's own report, and no hit does not clear an address)."
        }
      },
      "required": [
        "chain",
        "to"
      ]
    }
  },
  "required": [
    "type",
    "method"
  ],
  "additionalProperties": false
}

Output schema

{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "properties": {
    "input": {
      "additionalProperties": false,
      "properties": {
        "method": {
          "enum": [
            "GET"
          ],
          "type": "string"
        },
        "queryParams": {
          "properties": {
            "chain": {
              "description": "Chain of the transfer.",
              "enum": [
                "base",
                "polygon",
                "solana",
                "xrpl"
              ],
              "type": "string"
            },
            "expected": {
              "description": "Optional: the address you meant to send to (lookalike check).",
              "type": "string"
            },
            "to": {
              "description": "Recipient address you are about to send to.",
              "type": "string"
            },
            "token": {
              "description": "Optional: token contract on Base or Polygon (ScamSniffer public list, GPL-3.0, up to 7-day delay).",
              "type": "string"
            }
          },
          "required": [
            "chain",
            "to"
          ],
          "type": "object"
        },
        "type": {
          "const": "http",
          "type": "string"
        }
      },
      "required": [
        "type",
        "method"
      ],
      "type": "object"
    },
    "output": {
      "properties": {
        "example": {
          "description": "Horizon Pulse tx-guard: mechanical allow/warn/block per check (expected match, OFAC SDN snapshot, account age, scam token) and overall. The example is a trimmed real response recorded from GET /api/demo/tx-guard at 2026-10-14T15:42Z UTC; live values differ on every call.",
          "type": "object"
        },
        "type": {
          "type": "string"
        }
      },
      "required": [
        "type"
      ],
      "type": "object"
    }
  },
  "required": [
    "input"
  ],
  "type": "object"
}