Feeless402

Price any x402 (HTTP 402 Payment Required) API across payment rails and see what the same call costs on each — live, from the server's own quote.

CommunityOnlineNo sign-inGlobalFreeRead-only

What it can do

  • X402 Quote: Fetch an x402 endpoint's payment quote WITHOUT paying: price in XNO, destination, and the full offer menu across all rails.
  • X402 Compare: Price the same API call on EVERY rail the server offers (Base/Solana USDC, Lightning, XNO...) from live data — the payer-cost arithmetic agents use to pick a rail.
  • Faucet Info: Live status of the Feeless402 starter faucet: address, per-claim amount, remaining balance, and how an agent claims.

What data it sees

Do you need an account

No: the server works without sign-in

Price any x402 (HTTP 402 Payment Required) API across payment rails and see what the same call costs on each — live, from the server's own quote. Gas rails floor micro-prices at ~$0.001; the feeless Nano (XNO) rail quotes the true metered amount, so sub-millicent calls cost sub-millicents.

Tools: x402_quote · x402_compare · faucet_info · get_started

This hosted endpoint is read-only and holds no wallet — nothing to steal, nothing to spend. For the full self-custodied experience (pay per call, earn as a merchant, claim free starter XNO from the faucet):

pip install feeless402 claude mcp add feeless402 -- uvx feeless402 mcp

Docs: feeless402.com · Spec: railhint.com · Official MCP registry: com.feeless402/nano-pay

How to connect

How to connect Feeless402 to Claude

The server address to paste into Claude settings:

https://feeless402--glenn-quinting.run.tools

  1. Open Claude (claude.ai or the desktop app).
  2. Go to Settings → Connectors.
  3. Click Add custom connector.
  4. Paste the server address copied below into Remote MCP server URL and click Add.
  5. In a chat, click + → Connectors and switch the new connector on.

Custom connectors are available on Free, Pro, Max, Team and Enterprise plans (Free is limited to one). On Team and Enterprise an organization Owner adds the connector first under Organization settings → Connectors.

Authorization

After you click Add, a sign-in window for the service opens. Sign in with your own account and approve access. Claude never sees your password.

How to connect Feeless402 to ChatGPT

The server address to paste into ChatGPT settings:

https://feeless402--glenn-quinting.run.tools

  1. Open ChatGPT in a browser (chatgpt.com). A Plus, Pro, Business, Enterprise or Edu plan is required.
  2. Turn on developer mode once: Settings → Apps → Advanced settings → Developer mode.
  3. Open Settings → Connectors and click Create.
  4. Fill in the form: Name (anything), Description (one line about what the service does), MCP server URL (copy it below).
  5. Under Authentication choose OAuth if the service requires sign-in, otherwise None. Click Create.
  6. In a new chat open + → Apps/Connectors and enable the connector.

OpenAI has renamed this section before (Connectors → Apps/Plugins). If the label differs, search settings for "developer mode". On Business/Enterprise workspaces an admin must allow custom connectors first.

Authorization

On first use ChatGPT opens the service's sign-in window. Sign in and approve access.

How to connect Feeless402 to Cursor

The server address to paste into Cursor settings:

https://feeless402--glenn-quinting.run.tools

Fastest: click Open in Cursor below and confirm the prompt.

Manually:

  1. In Cursor open Settings → Cursor Settings → MCP and click Add new global MCP server.
  2. Paste the JSON copied below into ~/.cursor/mcp.json (per project: .cursor/mcp.json in the repo root).
  3. Save the file. The server appears in the MCP list; authorize it there if asked.

Authorization

If the service needs sign-in, an authorize button appears next to the server in the MCP list.

Server tool list (4)

Raw names from tools/list. Only developers need these.

x402_quoteFetch an x402 endpoint's payment quote WITHOUT paying: price in XNO, destination, and the full offer menu across all rails.
x402_comparePrice the same API call on EVERY rail the server offers (Base/Solana USDC, Lightning, XNO...) from live data — the payer-cost arithmetic agents use to pick a rail.
faucet_infoLive status of the Feeless402 starter faucet: address, per-claim amount, remaining balance, and how an agent claims.
get_startedHow to get the full self-custodied Feeless402 toolset (pay, earn, claim) running locally in under a minute.