SendCheck — EVM address verification (x402) MCP server
Pre-send EVM address checks: free pre-check, $0.01 check, $0.05 deep scan. x402: payment is auth.
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If you have run it, two minutes of your experience saves the next person an afternoon.
SendCheck — EVM address verification (x402) tools (3)
write = sends, deletes, buys or postscheck_addressFreePaid 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.
deep_scanFreePaid 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.
validate_addressFreeFREE 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.
Public scan report
scanner v0.1.9 · 2026-09-19 · same rubric, same numbers if you re-run it
- –Code scanremote-only server, no package to scann/a
- Live reliabilityremote reachable in 351ms20/20
- Tool poisoning3 tool descriptions checked15/15
- Auth qualityopen endpoint, read-only tools10/15
- Maintenancelast push 10 days ago15/15
- Maintainer identitynamespace and repository owner differ4/10
Install directly
claude mcp add --transport http sendcheck https://api.pennyforge.org/mcp
SendCheck — EVM address verification (x402): common questions
- Is SendCheck — EVM address verification (x402) MCP server safe?
- Yes, by our scan: it is graded A (85/100). Read the SendCheck — EVM address verification (x402) safety report
- How do I install SendCheck — EVM address verification (x402)?
- It runs remotely at api.pennyforge.org. Add it to Claude Code, Claude Desktop or Cursor with the snippets above, or call it through the mcp.market gateway without installing anything.
- Does SendCheck — EVM address verification (x402) need an API key?
- Not as far as the registry entry and our scan can tell: no credentials are declared or required.
- Is SendCheck — EVM address verification (x402) maintained?
- The last commit was 10 days ago (2026-09-10). The latest release is v1.0.0.
- Is SendCheck — EVM address verification (x402) up?
- 100% of our last 1 checks got an answer. We check remote servers about four times a day.
- What can I use instead of SendCheck — EVM address verification (x402)?
- Servers from other publishers that do the same job: POPCORN MCP server, Blockrun MCP server and PipRail MCP server. Compare all SendCheck — EVM address verification (x402) alternatives.
Alternatives to SendCheck — EVM address verification (x402)
Same job from other publishers: the closest match first, then the best rated.
POPCORN MCPSigned time and SHA-256 witness receipts for agents, with offline verification and x402 payment.not reviewedGrowingB- BlockrunWeb search, deep research, prediction markets & crypto data for AI agents. Pay per call via x402.not reviewedEstablishedB
- PipRailBudget-bound x402 payment wallet for AI agents — pays HTTP 402 URLs, capped locally. No backend.not reviewedGrowingB
IronWalletNon-custodial crypto wallet MCP: check balances, sign and send transfers, and swap tokens locally.not reviewedGrowingA- X402 Data GatewayPaid x402 and MPP tools for agent discovery, payment safety, data, and DeFi.not reviewedGrowingB
