dev.workers.w0arvg81zlgf.x402-precheck/precheck
x402 Precheck
Is the x402 Precheck MCP server down? No. It answered initialize and tools/list in the probe of 2026-11-10.
Check an x402 payment challenge before your agent pays: network, USDC, amount, payTo, facilitator.
alive probed 2026-11-15 · unchanged since 2026-11-10 · HTTP 200
- Endpoint
- https://x402-precheck.w0arvg81zlgf.workers.dev/mcp (streamable-http)
- Host
- x402-precheck.w0arvg81zlgf.workers.dev
- Protocol
- 2025-11-25
- Reports itself as
- x402-precheck 1.0.0-precheck
- Capabilities
- tools
- Instructions
- 529 characters
- Of a 1M window
- <0.1 % of a 1M context window
- Count
- 739 tokens in Claude Opus 5.5, exact, measured 2026-11-10. With the Claude Code prefix mcp__…__ on each tool name: 747. The o200k_base estimate is 432. Counted again when the tool definitions change. Method.
- Website
- https://x402-precheck.w0arvg81zlgf.workers.dev/
- Registry
- active, updated 2026-11-10 · registry entry
Most expensive tools
The Claude column scales the o200k estimate of each tool by this server's ratio of exact to estimate, 1.71×.
| Tool | ≈ Claude tokens | o200k estimate | Share of this server |
|---|---|---|---|
| x402_precheck | 739 | 432 | 100 % |
Compare this server with others.
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Servers that mention precheck.
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- io.github.CloudCorpRecords/domaincheck · alive
- MoneyTools x402 agent toolkit dev.moneytools/pay-precheck · alive
- x402 Agent Utilities dev.workers.w0arvg81zlgf.x402-exp/agent-utilities · alive
- MoneyTools payment-safety suite dev.moneytools/payment-safety · alive
Badge for the README
The result of the latest probe, the tool count and the token cost. The feed has an entry for every probe that changed them.
A mail when this server changes
Stops answering, comes back, tool set or cost changes. One confirmation mail first, a stop link in every mail.
For the publisher
- The server answers initialize and tools/list. Nothing to fix.
Fixed something? Probe it now, with the same steps as the daily run. This page updates with the next daily run.