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Pennyforge MCP server

Which MCP servers are Pennyforge's own, from the official registry and from asking its own domain, whether they answer, and what they offer. A program checked each of these, nobody copied them from a product page.

read 2026-10-26

← Back to Pennyforge

Whose server it is
  • Registry nameorg.pennyforge.api/sendcheckverified in the MCP registry

The registry name sits under pennyforge.org. The registry only lets a publisher use that namespace after proving control of the domain through DNS or HTTP.

When we asked itchecked 2026-10-26
  • Stateanswerschecked 2026-10-26
  • Tools3
  • Server calls itselfsendcheck
  • Server version1.0.0
  • Protocol version2025-06-18

On 2026-10-26 the server answered initialize and tools/list without a sign-in. First answer in 197 ms.

Should an agent connect itConnect it
  • Its tools do every use case we checked: Verify an EVM address checksum before sending; Catch a wrong-network send before funds move; Compare USDC and USDT balances on a receiving address.

Once connected

  • For "Verify an EVM address checksum before sending", the likely first call is validate_address.

Said by rules from the measurements above. The likely first call is a model's pick from the tool list; read its description before relying on it.

Measured dailydaily checks: 8, the first on 2026-10-26
  • INITE MCP score87 of 100answers 100 · does the job 100 · definitions 83 · context 100 · use 0 · connects 100
  • What an agent can do with it3 of 3 use cases
  • Answered100% of days8 of 8 daily checks
  • Median first answer247 ms
  • Space in an agent's context≈ 507 tokensthe definitions of all its tools (3), which an agent carries on every turn
  • Tool definitionsB · 83 of 100
  • Typed results0 of 3 toolsdeclared outputSchema: results come typed, read once
  • Not saying whether it only reads or can destroy: 3 of 3

What an agent can do with it

  • can do · Verify an EVM address checksum before sending
  • can do · Catch a wrong-network send before funds move
  • can do · Compare USDC and USDT balances on a receiving address

Each of the product's use cases, put to Jev against this server's tool list: can an agent do it with these tools?

Worth a look

None of the five warning signs in these definitions.

A program checks the server once a day: initialize and tools/list, no model. Tokens are the definitions' length at about four characters a token. The grade averages six checks of every tool's name, description, schema and annotations; it says how well the tools are described, not whether they work. The score weighs what was measured and nothing else: answering (25%), doing the product's job (25%), definitions (20%), context (10%), use (10%) and how readily a client connects (10%). A part that was not measured is left out, and a hidden instruction caps the score at 40. The state of vendors' MCP servers: method and numbers →

Tools it offers3 tools · read 2026-10-26
  • validate_address

    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.

  • 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…

  • deep_scan

    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…

How to connect

Add the server to your MCP client config. Claude Desktop, Cursor and most other clients read this shape:

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

Add it

Claude Code, in a terminal

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

Add to CursorAdd to VS Code

claude.ai, ChatGPT and other clients: add https://api.pennyforge.org/mcp as a custom connector in the settings.

Each line is something a program found when it went looking: the registry entry, the server's own answer, a spec that parses. A missing line means we did not find it, not that it does not exist.