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8 clients · secrets stay placeholders

JSON (mcpServers)Claude CodeCodexOpenCodeCursorVS CodeGemini CLIGoose

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

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

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

{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "sendcheck": {
      "type": "remote",
      "url": "https://api.pennyforge.org/mcp",
      "enabled": true
    }
  }
}

{
  "mcpServers": {
    "sendcheck": {
      "type": "http",
      "url": "https://api.pennyforge.org/mcp"
    }
  },
  "deeplink": "cursor://anysphere.cursor-deeplink/mcp/install?name=sendcheck&config=eyJ0eXBlIjoiaHR0cCIsInVybCI6Imh0dHBzOi8vYXBpLnBlbm55Zm9yZ2Uub3JnL21jcCJ9"
}

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

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

extensions:
  "sendcheck":
    enabled: true
    name: "sendcheck"
    type: streamable_http
    uri: "https://api.pennyforge.org/mcp"
    timeout: 300

Quality 79 / 100good

protocol75 · weight 25

warn
protocol.modernnewest supported version is 2025-06-18; 2026-07-28 not supported, older versions are deprecated until 2027-07-28
n/a
protocol.statelessonly applies to 2026-07-28 servers
pass
protocol.transportstreamable HTTP
n/a
protocol.list_ttlonly applies to 2026-07-28 servers

authorizationn/a · weight 15

n/a
auth.prm, auth.as_metadata, auth.cimdno remote uses OAuth
n/a
auth.secret_in_urlno templated URL

tool hygiene71 · weight 30

pass
tools.descriptionsevery tool has a description
pass
tools.description_lengthdescriptions are concise
pass
tools.schemasevery tool has an object input schema
fail
tools.annotationsno tool declares readOnlyHint or destructiveHint, so clients cannot tell safe calls from risky ones
fail
tools.directory_hintsno tool declares all four of readOnlyHint, destructiveHint, idempotentHint and openWorldHint; missing: check_address (readOnlyHint, destructiveHint, idempotentHint, openWorldHint); validate_address (readOnlyHint, destructiveHint, idempotentHint, openWorldHint); deep_scan (readOnlyHint, destructiveHint, idempotentHint, openWorldHint)
pass
tools.token_costabout 476 tokens to load every tool
pass
tools.api_dumptools are not a one-to-one API dump

stability100 · weight 15

pass
stability.changesno tool changes in 30 days
pass
stability.rug_pullno tool changed its meaning under the same name

dependenciesn/a · weight 15

n/a
deps.known_vulns, deps.mcp_sdk_version, deps.resolvableno npm or PyPI package

3 tools, about 476 tokens to load them all · tool set 739145e8bc33 · checked 2026-10-20 00:54 UTC

Tool changes

No tool definition changes recorded. A server's first observation is its baseline; later probes record what changes.

Checks run on what our credential-free, read-only probes observe; tools are never called and no code audit is performed. How it is computed.

Trust 89 / 100

provenance75

liveness98

freshness85

hygiene100

+repository +dns-namespace +reachable +uptime-96% ~updated-41d-ago

Derived from observable signals (official registry feed and our own credential-free probes); no code audit performed. How it is computed.

Endpoints

remote	auth	reachable	uptime 30d	p50	protocol	last ok
`https://api.pennyforge.org/mcp` streamable-http	none	yes	96%	256 ms	2025-06-18	2026-10-19

Tools (3)

`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.
`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 check_address: first call returns the payment challenge; second call with x_payment returns the report.
`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.

Schemas: list_tools.

Similar MCP servers

Official server.json

{
  "name": "org.pennyforge.api/sendcheck",
  "title": "SendCheck — EVM address verification (x402)",
  "$schema": "https://static.modelcontextprotocol.io/schemas/2025-12-11/server.schema.json",
  "remotes": [
    {
      "url": "https://api.pennyforge.org/mcp",
      "type": "streamable-http"
    }
  ],
  "version": "1.0.0",
  "repository": {
    "url": "https://github.com/pennyforgeorg/sendcheck-verify",
    "source": "github"
  },
  "description": "Pre-send EVM address checks: free pre-check, $0.01 check, $0.05 deep scan. x402: payment is auth."
}