A deterministic verification engine for agents. Fires the edge cases your sandbox never sends — duplicate webhooks, declined cards, rate limits — then proves a fix: the same scenario fails on the old code and passes on the new. npm: fetchsandbox-mcp
Latest release v0.7.30 — MCP 0.7.30: qualified external operator inputs · 19 Oct 2026
1 file for Codex and OpenCode: mcp AGENTS.md — 488 tokens loaded in every session.
AGENTS.md A 488 tok These files are fetchsandbox/mcp's own configuration — they tell Codex and OpenCode how to work on this repository, so they are not mods to install elsewhere. Copy one as a starting point and replace the parts that are about this project.