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Api Endpoint

api.x402node.dev

Estimates the USD gas cost of a common action (transfer, erc20-transfer, approve, swap, nft-mint) across EVM chains, combining live gas price per chain with the native token price. Lets an agent pick the cheapest chain to execute and budget a transaction. Live aggregated gas + price compute. gas cost estimate, transaction fee usd, cheapest chain to execute, swap gas Accepts payment on Base or Solana — either network works.

Open interactive test console

Offering

Provider
api.x402node.dev
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://api.x402node.dev/chain/gas-estimate
MIME type
application/json
First seen
2026-10-16T01:58:26.121Z
Last seen
Tags
None supplied

Website

Payment pricing

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

Payment option 1
0.012 USDC
Atomic price: 12000 · Network: eip155:8453 · Asset: USDC · Scheme: exact
Payment option 2
0.012 USDC
Atomic price: 12000 · Network: solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp · Asset: USDC · Scheme: exact
Raw x402 terms
[
  {
    "scheme": "exact",
    "network": "eip155:8453",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "amount": "12000",
    "payTo": "0x4466d4A84b7c49a6A094ec6eef4a0712D6dd125e"
  },
  {
    "scheme": "exact",
    "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
    "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
    "amount": "12000",
    "payTo": "9urRvUx69HqAopg1JGV9P9wR7JdKoztzdkuNyJ8Eo1up"
  }
]

Observed health

Status
Healthy
Latest latency
181 ms
Average latency
327 ms
HTTP status
402
Last checked
Reachability
100% over 10 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": {
        "action": {
          "type": "string",
          "description": "transfer/erc20-transfer/approve/swap/nft-mint (default swap)"
        },
        "chain": {
          "type": "string",
          "description": "optional single chain; omit for all"
        },
        "gas": {
          "type": "string",
          "description": "optional custom gas units"
        }
      }
    }
  },
  "required": [
    "type",
    "method"
  ],
  "additionalProperties": false
}

Output schema

{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "type": "object",
  "properties": {
    "input": {
      "type": "object",
      "properties": {
        "type": {
          "type": "string",
          "const": "http"
        },
        "method": {
          "type": "string",
          "enum": [
            "GET"
          ]
        },
        "queryParams": {
          "type": "object",
          "properties": {
            "action": {
              "type": "string",
              "description": "transfer/erc20-transfer/approve/swap/nft-mint (default swap)"
            },
            "chain": {
              "type": "string",
              "description": "optional single chain; omit for all"
            },
            "gas": {
              "type": "string",
              "description": "optional custom gas units"
            }
          }
        }
      },
      "required": [
        "type",
        "method"
      ],
      "additionalProperties": false
    }
  },
  "required": [
    "input"
  ]
}