Base network and USDC facts: Base network facts for payment clients: chain id, USDC contract, RPC and explorer URLs

$0.01 per call · failed calls are never charged · no account or subscription: pay per call with a card key or USDC

Reference facts for paying and reading on Base mainnet: chain id, native USDC contract and decimals, block explorer and public RPC URLs, and the x402 network identifier. Use to configure an x402 or Base client.

Run it free (25 free calls) Buy credits by card (from $1) Example result (JSON)

Request

Over HTTP, with a card key from /credits:

curl -H "Authorization: Bearer adt_…" "https://tools.funwords.eu/network?format=json"

Or one of your 25 free calls, no key:

curl "https://tools.funwords.eu/network?format=json&trial=1"

Without a key, the same URL answers 402 Payment Required with x402 and MPP terms, so an agent with a wallet pays per call in USDC (Base, Polygon, Arbitrum or Solana over x402; Base or Tempo over MPP) and retries.

Example result

{
  "chain": "Base",
  "chainId": 8453,
  "caip2": "eip155:8453",
  "usdc": {
    "address": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "decimals": 6
  }
}

From an AI agent (MCP)

Add the MCP server to Claude, Cursor or any MCP client. This tool is network, and the first 25 successful calls are free:

https://tools.funwords.eu/mcp

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