Uptime (30d)%100.0

Latency (p50)893 msfaster than 19% of servers

Protocol eralegacy

Tools3

SendCheck — EVM address verification (x402)

Description

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

What our measurements say

SendCheck — EVM address verification (x402) is a remote MCP server published at api.pennyforge.org. It has been probed 6 times since 9/12/2026. It answered in 6 of them (100.0%), a near-uninterrupted record. Median response time is 893 ms, a delay an agent will notice. It offers a narrow, focused set of 3 tools. On the protocol side it still runs 2025-11-25 and has not moved to the newer spec.

LegacyLegacy ⚠Version: 1.0.0First probe: 2026-09-12 15:21:42Last probe: 2026-09-13 01:33:33

Agent readability score

Can an LLM agent pick the right tool here — names, descriptions and parameter clarity are assessed.

Agent readability score

No AI summary has been generated for this server yet. Summaries are prepared on request — ask for one and it will appear on this page within a few minutes.

Event narrative

Raw observations

Run	Era	Modern	ms	Legacy	ms	Versions
2026-09-13 01:33:33	Legacy	200	224	200	212	2025-06-18
2026-09-12 23:31:36	Legacy	200	1060	200	1047	2025-06-18
2026-09-12 21:29:15	Legacy	200	656	200	643	2025-06-18
2026-09-12 19:27:29	Legacy	200	911	200	893	2025-06-18
2026-09-12 17:24:09	Legacy	200	1146	200	1147	2025-06-18
2026-09-12 15:21:42	Legacy	200	215	200	213	2025-06-18

Supported versions

2025-06-18

as declared by server/discover + initialize

Capabilities

tools

Schema score

100

3 tools

Schema compliance

tools/list structure, inputSchema validity, and a functional smoke test — the components of the 0-100 score.

100/100

Excellent3 tools

tools/list schema valid
inputSchema is valid JSON Schema
Smoke test not run this round
Cold-start: cold 42ms → warm 40ms (penalty 2ms)

Tools

Tools the server advertised in the latest measurement — measured, not catalog-claimed.

validate_address1 param · 1 required
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.
- addressstringrequired
check_address3 params · 1 required
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.
- addressstringrequired
- chainstring
- x_paymentstring
deep_scan2 params · 1 required
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.
- addressstringrequired
- x_paymentstring

Availability history

Each block is one measurement round. Green: working response. Amber: responded but the server was returning errors (5xx). Red: no response at all.

Era history

Each cell is one probe run. Faded cells are incomplete probes — one leg did not answer, so the era is inconclusive.

Era distribution

Legacy100%

Legacy13.09 01:33

12.09 15:21Measurements: 613.09 01:33

Legacy

Response time history

The two probe legs separately: modern server/discover and legacy initialize.

server/discoverinitialize

Event log

Derived by comparing consecutive probes — changes in era, protocol version, build and reachability.

12 hours agoAdded to watch — era: Legacy

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Markdown

[![mcpmetrics](https://mcpmetrics.io/badge/org.pennyforge.api/sendcheck/era.svg)](https://mcpmetrics.io/servers/org-pennyforge-api-sendcheck)

HTML

<a href="https://mcpmetrics.io/servers/org-pennyforge-api-sendcheck"><img src="https://mcpmetrics.io/badge/org.pennyforge.api/sendcheck/era.svg" alt="mcpmetrics"></a>

Raw observations

You are seeing the last 7 days. Sign up for the full history. Which check failed and why is in the dashboard.

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