"Box" matching MCP connectors:

Real SEC EDGAR filing metrics: margin-of-safety, EPS growth, going-concern flags.

Read-only public CVE records, capability metadata, and agent instructions from Hacker Bob.

Public ISO 3166-1 record for BO.

Bank of England Interactive Statistical Database (IADB) MCP.

Bank of Japan (BOJ) / Japan monetary MCP. Keyless.

Bank of Israel public API MCP. Keyless.

China fuel prices: gasoline and diesel across all 31 provinces with adjustment forecast.

China A-share real-time stock quotes and major indices with dual-source fallback.

MCP server for China Railway 12306 ticket availability: schedules and seats by Chinese station name.

China holidays and lunar calendar lookup, solar-to-lunar conversion and yearly schedule.

25 deterministic data, repository, API, and public-web utilities with Base-USDC x402 pay-per-call settlement.