Api Endpoint

canary.countersignpay.com

Current Base mainnet block height and base fee per gas in wei, read from the chain at request time

Open interactive test console

Offering

Provider: canary.countersignpay.com
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://canary.countersignpay.com/v1/base/head
MIME type: application/json
First seen: 2026-10-16T01:50:14.534Z
Last seen: 2026-11-02T05:09:19.926Z
Tags: None supplied

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

Raw x402 terms

[
  {
    "scheme": "exact",
    "network": "eip155:8453",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "amount": "10000",
    "payTo": "0xa0f3c29f25778dDf46fce2cAB5f7e7C25E6a1451"
  }
]

Observed health

Status: Healthy
Latest latency: 96 ms
Average latency: 379 ms
HTTP status: 402
Last checked: 2026-11-02T05:09:19.921Z
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": {}
    }
  },
  "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": {},
          "type": "object"
        },
        "type": {
          "const": "http",
          "type": "string"
        }
      },
      "required": [
        "type",
        "method"
      ],
      "type": "object"
    },
    "output": {
      "properties": {
        "example": {
          "properties": {
            "baseFeePerGas": {
              "description": "Base fee per gas of that block, in wei, decimal string",
              "type": "string"
            },
            "blockHeight": {
              "description": "Latest block number on Base mainnet, decimal string",
              "type": "string"
            },
            "network": {
              "description": "CAIP-2 chain id, always eip155:8453",
              "type": "string"
            },
            "observedAt": {
              "description": "ISO 8601 time the chain was read",
              "type": "string"
            }
          },
          "required": [
            "blockHeight",
            "baseFeePerGas",
            "network",
            "observedAt"
          ],
          "type": "object"
        },
        "type": {
          "type": "string"
        }
      },
      "required": [
        "type"
      ],
      "type": "object"
    }
  },
  "required": [
    "input"
  ],
  "type": "object"
}