x402 Pay — USDC API Payment Helper MCP Server

by scriptmasterlabs Your server? Claim it

answering

x402 Pay — USDC API Payment Helper is answering right now. Last checked 12 min ago. It exposes 5 tools.

Pay for APIs with USDC. Read-only x402 payment discovery, verification, evidence, and status.

Uptime history 50 days of history · worst day 92%

50 days agonow

98.9%

Uptime 24h

90 of 91 checks

Tools

read from the server

379 ms

Response time

average over 24h

open, no key

Access

streamable-http

What changed 8

Every tool that appeared, vanished or quietly changed what it asks for. Recorded since 11 September 2026. No other catalogue keeps this.

13 Oct 4 tool descriptions were rewritten check_payment, check_status, list_paid_apis and 1 more

13 Oct 2 tools changed the parameters they ask for check_payment, list_paid_apis

13 Oct a tool appeared x402_inspect_challenge

11 Sep a tool changed version

x402 Pay — USDC API Payment Helper does not always answer

Over the last week it answered 99.1% of our checks. We check every 15 minutes, so you hear about the next outage within the hour — not from your users.

Connect this server

Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 12 min ago.

Claude Code Claude Desktop Codex Cursor VS Code

run in your terminal

claude mcp add x402-pay --transport http https://squeezeos-api.onrender.com/mcp/x402-pay

Settings → Connectors → Add custom connector, then paste this address

https://squeezeos-api.onrender.com/mcp/x402-pay

~/.codex/config.toml

[mcp_servers.x402-pay]
url = "https://squeezeos-api.onrender.com/mcp/x402-pay"

.cursor/mcp.json

{
  "mcpServers": {
    "x402-pay": {
      "url": "https://squeezeos-api.onrender.com/mcp/x402-pay"
    }
  }
}

.vscode/mcp.json

{
  "servers": {
    "x402-pay": {
      "type": "http",
      "url": "https://squeezeos-api.onrender.com/mcp/x402-pay"
    }
  }
}

Available tools 5

Read directly from the server with tools/list, grouped by what they act on. If a tool disappears, we record the date.

payment

check_payment

Inspect a public HTTPS URL for a fresh x402 v2 HTTP 402 challenge using an unsigned GET with a 10-second network timeout and no redirect following. Returns validated payTo, asset, network, atomic amount, resource and maxTimeoutSeconds; incomplete or non-x402 responses return challenge=null and a reason. Does not sign, settle or verify receipts. Fresh requirements override documented receiver hints; inspect canonical_receiver_match before choosing to pay.

payment_info

Read the documented SML x402 v2 Base/USDC configuration and receiver before selecting a paid route. Returns configuration and a read-only policy. Fresh resource requirements override these hints; this tool does not sign, spend or prove settlement.

paid

list_paid_apis

List paid API operations declared by the live SqueezeOS OpenAPI document, bounded by limit. Returns method, path, job and advertised price. Use for route selection, then inspect that resource's fresh 402 challenge; listed prices do not authorize payment.

status

check_status

Read the current SqueezeOS backend status and payment-readiness evidence. Returns both upstream envelopes and autonomous_spend=false. Use to diagnose readiness before purchase; HTTP availability or readiness flags alone do not establish settled or accepted delivery.

x402

x402_inspect_challenge

Inspect a fresh x402 v2 challenge without sending payment. Compatible alias of check_payment with the same schema, 10-second unsigned probe and result. Use before a paid resource call; do not use as a signer, receipt verifier or settlement proof. Non-402 and incomplete challenges remain null rather than receiving invented defaults.

Endpoints

URL	Transport	State	Latency	Checked
https://squeezeos-api.onrender.com/mcp/x402-pay	streamable-http	answering	233 ms	12 min ago

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x402 Pay — USDC API Payment Helper — questions

Answers built from our own checks of this server.

What can x402 Pay — USDC API Payment Helper do?

It exposes 5 tools, read directly from the server on our last check. Among them: check_payment, check_status, list_paid_apis, payment_info, x402_inspect_challenge. The full list with descriptions is on this page — we take it from the server itself via tools/list, not from a README. How MCP servers expose tools in the first place →

Is x402 Pay — USDC API Payment Helper working right now?

We send a real MCP handshake every 15 minutes. Over the last 24 hours 90 of 91 checks got a reply (98.9%), average response time 379 ms. The bar chart above shows every period we have measured.

How do I connect x402 Pay — USDC API Payment Helper?

Copy the ready config from this page. We generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each in the form that client actually reads. It is a remote server, so there is nothing to install — the client connects to the address.

Does x402 Pay — USDC API Payment Helper need an API key?

No. x402 Pay — USDC API Payment Helper completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 5 of them are readable on this page. This is what we observed, not what the docs claim.

How fast is x402 Pay — USDC API Payment Helper?

It answers our handshake in 379 ms on average, which is faster than 39% of all working MCP servers we measure. The comparison comes from our own checks across the whole registry, every 15 minutes.