Agent402.Tools: pay-per-call web tools

Remote (streamable-http)

https://agent402.tools/mcp Reachable (checked 2026-09-24)

Claude Code:

claude mcp add --transport http agent402 https://agent402.tools/mcp

Or add to your MCP client config:

{
  "mcpServers": {
    "agent402": {
      "url": "https://agent402.tools/mcp"
    }
  }
}

Package (npm 0.13.4)

npx -y agent402-mcp@0.13.4

Or add to your MCP client config:

{
  "mcpServers": {
    "agent402": {
      "command": "npx",
      "args": [
        "-y",
        "agent402-mcp@0.13.4"
      ],
      "env": {
        "AGENT_KEY": "<YOUR_VALUE>",
        "AGENT402_BUDGET": "<YOUR_VALUE>",
        "AGENT402_MAX_PER_CALL": "<YOUR_VALUE>",
        "AGENT402_CREDITS_KEY": "<YOUR_VALUE>",
        "SOLANA_AGENT_KEY": "<YOUR_VALUE>",
        "AGENT402_NETWORKS": "<YOUR_VALUE>"
      }
    }
  }
}

• AGENT_KEY secret — Hex private key of an EVM wallet funded with USDC on any EVM rail the server offers (Base, Polygon, Arbitrum, Monad, Celo, Avalanche, Sei, Optimism) or USDG on Robinhood Chain; use SOLANA_AGENT_KEY for Solana. Stellar and Algorand are not signed by this package. Unset = proof-of-work mode (free pure-CPU tools).
• AGENT402_BUDGET — Optional hard cap on total USDC spent per session (e.g. 1.00). Refused before any payment is signed.
• AGENT402_MAX_PER_CALL — Optional max USD price for any single call (e.g. 0.01).
• AGENT402_CREDITS_KEY secret — Prepaid card-credits key (a402_...) from https://agent402.tools/credits. With it set and no wallet key, every tool pays by card; the list price is debited only on a successful call.
• SOLANA_AGENT_KEY secret — Optional base58 (or JSON byte-array) secret key of a Solana wallet funded with USDC on Solana.
• AGENT402_NETWORKS — Optional: restrict and order the chains to pay on (e.g. "base,solana" or a CAIP-2 like eip155:4663).