dev.workers.soloearn.x402-seller-kit/x402-checker
x402 endpoint checker
Test any x402 paid URL without paying: 402, PAYMENT-REQUIRED, USDC, amounts, payTo, EIP-712, CORS.
alive probed 2026-10-09 · HTTP 200
1tools
248tokens in Claude Opus 5.5
258tokens in Claude Code
0.1 %of a 200k context window
135o200k_base estimate
175 msto initialize
154 msto list tools
- Endpoint
- https://x402-seller-kit.soloearn.workers.dev/mcp (streamable-http)
- Host
- x402-seller-kit.soloearn.workers.dev
- Protocol
- 2025-11-25
- Reports itself as
- x402-checker 1.0.0
- Capabilities
- tools
- Instructions
- 117 characters
- Claude count
- Claude Opus 5.5, measured 2026-10-09. Counted again when the tool definitions change. Method.
- Website
- https://x402-seller-kit.soloearn.workers.dev/tools/x402-checker
- Registry
- active, updated 2026-10-08 · registry entry
- Reachable
- 1 of the last 1 probe
Most expensive tools
| Tool | Tokens (o200k) | Share of this server |
|---|---|---|
| check_x402_endpoint | 135 | 100 % |
Badge and feed
[](https://mcpcost.ulehla.dev/s/dev.workers.soloearn.x402-seller-kit/x402-checker)
An entry for every probe that changed the result, the tool count or the token cost: Atom feed. Add it to a feed reader or a Slack RSS app to hear when the server stops answering or its tool set grows.