What is the SendCheck remote MCP server?
The SendCheck remote MCP server is a hosted Model Context Protocol endpoint at https://api.pennyforge.org/mcp, so AI assistants can connect to it without installing or running anything locally.
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SendCheck MCP Server
@pennyforgeorg
Basic information
About SendCheck MCP Server
Pre-send EVM address checks for USDC on Base, including checksum checks and x402-paid address or deep scans.
Connection details
https://api.pennyforge.org/mcpSetup
claude mcp add sendcheck --transport http https://api.pennyforge.org/mcpSendCheck MCP Server tools
3FREE pre-send check of an EVM address: EIP-55 checksum verification (catches typos, dropped characters, clipboard malware) + a note that a passing checksum is a spell-check, not payee verification. Run this before paying for check_address.
Paid pre-send verification of one EVM address on one chain ($0.01 USDC via x402, EIP-3009 on Base): checksum, wallet-vs-contract, outgoing activity, native/USDC/USDT balances, leveled verdict with reasons and next action. TWO-PHASE: call without x_payment first to get the exact payment challenge (payTo, amount, asset), sign the USDC transfer, then call again with x_payment = the resulting X-Payment header to get the report. No account, no API key — the payment is the authentication.
Paid deep scan: the full verification across ALL FIVE chains (Base, Ethereum, Arbitrum, Optimism, Polygon) incl. wrong-network detection and USDC/USDT token-mismatch flags ($0.05 USDC via x402, EIP-3009 on Base). TWO-PHASE like check_address: first call returns the payment challenge; second call with x_payment returns the report.
Overview
What is SendCheck?
Pre-send EVM address checks for USDC on Base, including checksum checks and x402-paid address or deep scans.
How to use SendCheck?
Add https://api.pennyforge.org/mcp as a remote HTTP server in an MCP-compatible client.
Key features of SendCheck
validate_address— FREE pre-send check of an EVM address: EIP-55 checksum verification (catches typos, dropped characters, clipbocheck_address— Paid pre-send verification of one EVM address on one chain ($0.01 USDC via x402, EIP-3009 on Base): checksum,deep_scan— Paid deep scan: the full verification across ALL FIVE chains (Base, Ethereum, Arbitrum, Optimism, Polygon) inc
Connection details
- Transport: Remote Streamable HTTP
Documentation
Frequently asked questions
How do I connect to the SendCheck MCP server?
Add the endpoint https://api.pennyforge.org/mcp to any MCP-compatible client such as Claude Code, Cursor, or VS Code. The setup snippets on this page configure each client in one step.
Does the SendCheck MCP server require authentication?
Authentication requirements for SendCheck have not been confirmed in this listing. Check the provider’s documentation before connecting.
Which transport does the SendCheck MCP server use?
SendCheck exposes a streamable-http endpoint, the transport used by remote MCP servers and supported by all major MCP clients.
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