MCP server

SendCheck — EVM address verification (x402)

org.pennyforge.api/sendcheck

Checked 25 Oct 2026, 20:29 UTC · Connected to it and listed its tools

Pre-send EVM address checks: free pre-check, $0.01 check, $0.05 deep scan. x402: payment is auth.

Working at last checkVerified publisher: pennyforge.orgAbout 579 tokens per request once connected3 tools

https://api.pennyforge.org/mcp

At a glance

Type: MCP server
Publisher: pennyforge.org (verified by the MCP Registry)
Status: Working at last check
Tools: 3
Token cost: About 579 tokens per request
Sets up in: Claude Code, Claude Desktop, Codex, Gemini CLI, Cursor, VS Code, Antigravity, ChatGPT, OpenAI API, Grok
Last checked: 25 Oct 2026, 20:29 UTC

Opens the app, which shows the server and asks you to confirm. For other apps, copy the setup below.

Claude Code

claude mcp add --transport http sendcheck https://api.pennyforge.org/mcp

Claude Desktop

Settings → Connectors → Add custom connector, and paste the URL.

Codex (config.toml)

[mcp_servers.sendcheck]
url = "https://api.pennyforge.org/mcp"

Gemini CLI

{"mcpServers":{"sendcheck":{"httpUrl":"https://api.pennyforge.org/mcp"}}}

Cursor

{"mcpServers":{"sendcheck":{"url":"https://api.pennyforge.org/mcp"}}}

VS Code

{"servers":{"sendcheck":{"type":"http","url":"https://api.pennyforge.org/mcp"}}}

Antigravity

agy mcp add sendcheck https://api.pennyforge.org/mcp

ChatGPT

Settings → Apps & Connectors → Advanced settings: turn on Developer mode, then Create a connector and paste the URL. Which plans can do this varies.

OpenAI API (Responses tools)

{"type":"mcp","server_label":"sendcheck","server_url":"https://api.pennyforge.org/mcp","require_approval":"always"}

Grok (xAI API tools)

{"type":"mcp","server_label":"sendcheck","server_url":"https://api.pennyforge.org/mcp"}

check_address ~267 tokens
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 (pa
deep_scan ~184 tokens
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 wit
validate_address ~128 tokens
FREE 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.

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