A Permit Layer for MCP Tool Calls: Same-Key Retries Return the Original Receipt
HotPocketWaves · reddit · 2026-10-05
A non-technical founder (AI-assisted build) launched AMW, a permit layer sitting between an agent and an MCP tool.
- Agents act under a permit; a same-key retry returns the original receipt with no second call or charge.
- Calls outside the permit are refused before any charge occurs.
- Every call gets a signed receipt verifiable offline.
Stage: self-funded, no revenue, no pilots, repo still private; next goal is a first paid pilot. The author asks the community how they handle retries against MCP tools that charge or mutate state, and whether a permit with budget, expiry and per-tool limits is useful or better solved inside the tool.
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