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x402-mcp

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x402-mcp.onrender.com

Pay for HTTP APIs and charge for your own: x402 micropayments in USDC on Base.

https://x402-mcp.onrender.com/mcp/mcpWebsiteNo authMCP 2025-11-25v1.30.0last checked 18 Oct 2026spoke MCP on 100% of 82 checks (30 days)initialize in 695 ms

Will my client connect?

Decided from what the probe found at the endpoint, and from what each client's own documentation says it can complete. Every row carries the day that documentation was read.

✓Claude CodeConnects

The endpoint answers an anonymous handshake, so no credential is needed.

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

Claude Code docs · read on 2026-08-30

✓Claude (claude.ai & Desktop)Connects

The endpoint answers an anonymous handshake, so no credential is needed.

Settings → Connectors → Add custom connector, then paste https://x402-mcp.onrender.com/mcp/mcp.

Claude (claude.ai & Desktop) docs · read on 2026-08-30

✓ChatGPTConnects

The endpoint answers an anonymous handshake, so no credential is needed.

Settings → Apps → Advanced settings → Developer mode, then create a connector pointing at https://x402-mcp.onrender.com/mcp/mcp.

ChatGPT docs · read on 2026-08-30

✓CursorConnects

The endpoint answers an anonymous handshake, so no credential is needed.

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

Cursor docs · read on 2026-08-30

✓VS Code (Copilot)Connects

The endpoint answers an anonymous handshake, so no credential is needed.

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

VS Code (Copilot) docs · read on 2026-08-30

How to authenticate

Checked against the endpoint by our probe on 18 Oct 2026. These are the capabilities the server advertises, not a prediction about any particular client.

Scheme	No auth
Protected-resource metadata	✕Not found Without it a client has to guess where the authorization server lives.
Anonymous access	Handshake succeeds; 20 tools listable

What the probe found

No CORS headers for browser-based clients

A cross-origin preflight came back without Access-Control-Allow-Origin, so the endpoint is reachable from native clients only — code running in a web page is stopped by the browser before a request is ever sent.

Tools

a2a.resolve_cardcity.checkcity.listcity.samplecommerce.activate_procommerce.credits_requirementscommerce.pro_requirementscommerce.purchase_creditsops.metricspulse.baseswarm.researchswarm.revenueswarm.settlex402.agent_cardx402.build_sellerx402.discoverx402.networksx402.pay_and_fetchx402.probex402.verify

Contract history

18 Oct 2026v1.30.02 compatibleinstructions rewritten

Instructions rewritten: commerce.activate_pro, commerce.purchase_credits. The description an agent follows changed; the callable contract may not have.

17 Oct 2026v1.30.01 breakinginstructions rewritten

Breaking: city.check

Instructions rewritten: city.check. The description an agent follows changed; the callable contract may not have.

30 Sep 2026v1.30.02 compatible

30 Sep 2026v1.30.01 breaking

Breaking: city.check

20 Sep 2026v1.30.04 breaking1 compatible

Breaking: get_agent_card, mailrail.inbound, mailrail.send, mailrail.status

18 Sep 2026v1.30.01 compatible

17 Sep 2026v1.30.01 breaking

Breaking: get_agent_card

16 Sep 2026v1.30.01 compatible

13 Sep 2026v1.30.01 cosmeticinstructions rewritten

Instructions rewritten: city.check. The description an agent follows changed; the callable contract may not have.

13 Sep 2026v1.30.01 breaking

Breaking: commerce.stripe_checkout

12 Sep 2026v1.30.01 cosmeticinstructions rewritten

Instructions rewritten: swarm.revenue. The description an agent follows changed; the callable contract may not have.

11 Sep 2026v1.30.05 compatible

11 Sep 2026v1.30.03 compatible

8 Sep 2026v1.30.0no contract changes

2 Sep 2026v1.29.1first recorded contract

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Status badge

Status for a README, from the last probe — cached an hour, so up to seven hours behind the endpoint. Links back to this page.

[![MCP status](https://mcpi.app/servers/x402-mcp/badge.svg)](https://mcpi.app/servers/x402-mcp)