x402 Pay — USDC API Payment Helper
https://squeezeos-api.onrender.com/mcp/x402-pay ↗
Description
Pay for APIs with USDC. Read-only x402 payment discovery, verification, evidence, and status.
What our measurements say
x402 Pay — USDC API Payment Helper is a remote MCP server published at squeezeos-api.onrender.com. 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 247 ms, placing it among the faster endpoints. It offers a narrow, focused set of 4 tools. On the protocol side it still runs 2025-11-25 and has not moved to the newer spec.
Agent readability score
Can an LLM agent pick the right tool here — names, descriptions and parameter clarity are assessed.
Agent readability score
Strengths
- Parameters are explicitly typed with clear required/optional status
- Tools have distinct functional domains (discovery, verification, listing, status)
Weaknesses
- Tool names use generic terms like 'check' without specifying x402 context
- Descriptions focus on what tools do rather than when/why to use them
- No error handling documentation for edge cases
payment_info— Name lacks specificity about x402 payment contextlist_paid_apis— Parameter 'limit' lacks default value documentationcheck_status— Description doesn't clarify what 'payment authority' refers tocheck_payment— No documentation for invalid URL handling
Verdict
Event narrative
Risk: low
Advice
Schema compliance
tools/list structure, inputSchema validity, and a functional smoke test — the components of the 0-100 score.
- tools/list schema valid
- inputSchema is valid JSON Schema
- Smoke test not run this round
- Cold-start: cold 221ms → warm 194ms (penalty 27ms)
Tools
Tools the server advertised in the latest measurement — measured, not catalog-claimed.
payment_infoReturn the canonical ScriptMasterLabs x402 payment network and receiver. Never spends.
list_paid_apisList live SML x402 paid API operations from the canonical SqueezeOS OpenAPI document.
limitinteger
check_paymentInspect an HTTPS URL for a live x402 402 challenge without sending payment.
urlstringrequired
check_statusCheck the live always-on SqueezeOS payment authority.
Availability history
Event log
Derived by comparing consecutive probes — changes in era, protocol version, build and reachability.
- Added to watch — era: Legacy
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[](https://mcpmetrics.io/servers/com-scriptmasterlabs-x402-pay)<a href="https://mcpmetrics.io/servers/com-scriptmasterlabs-x402-pay"><img src="https://mcpmetrics.io/badge/com.scriptmasterlabs/x402-pay/era.svg" alt="mcpmetrics"></a>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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