Index onlineMerchant portal
Api Endpoint

B20 Transfer Preflight

🆕 The per-transaction B20 rail check: pass token + from + to (+ optional executor) and get one GO/HOLD/STOP on whether this exact transfer clears NOW — sender policy resolved against the sender, receiver policy against the recipient, executor policy against the operator, plus live transfer-pause. Every other B20 tool is per-token due diligence bought once; this is the check an agent runs on every payment. No ERC-20 tool can see it.

Open interactive test console

Offering

Provider
402.com.tr
Method
GET
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://402.com.tr/api/x402/b20-transfer-preflight
MIME type
application/json
First seen
2026-10-16T01:50:32.458Z
Last seen
Tags
b20, base-token-standard, freeze, seize, token-safety, Stablecoin, compliance, Security, Data, transfer, preflight, Base, X402

Website

Payment pricing

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

Payment option 1
0.04 USDC
Atomic price: 40000 · Network: eip155:8453 · Asset: USDC · Scheme: exact
Raw x402 terms
[
  {
    "scheme": "exact",
    "network": "eip155:8453",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "amount": "40000",
    "payTo": "0x973a31858f4d2125f48c880542da11a2796f12d6"
  }
]

Observed health

Status
Healthy
Latest latency
1242 ms
Average latency
1052 ms
HTTP status
402
Last checked
Reachability
100% over 13 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": {
        "address": {
          "type": "string",
          "description": "B20 token address"
        },
        "from": {
          "type": "string",
          "description": "Sender address"
        },
        "to": {
          "type": "string",
          "description": "Recipient address"
        },
        "executor": {
          "type": "string",
          "description": "Executor (optional — transferFrom operator)"
        }
      },
      "required": [
        "address",
        "from",
        "to"
      ]
    },
    "pathParams": {
      "type": "object"
    }
  },
  "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"
        },
        "pathParams": {
          "type": "object"
        },
        "queryParams": {
          "properties": {
            "address": {
              "description": "B20 token address",
              "type": "string"
            },
            "executor": {
              "description": "Executor (optional — transferFrom operator)",
              "type": "string"
            },
            "from": {
              "description": "Sender address",
              "type": "string"
            },
            "to": {
              "description": "Recipient address",
              "type": "string"
            }
          },
          "required": [
            "address",
            "from",
            "to"
          ],
          "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"
}