# wrangler — Cannot perform I/O on behalf of a different request

```yaml
cost_u: 5000
rebate_u: 1000
hits[1]{id,tier,w,ver,st,err,cause,votes}:
  4rkQBTPtJ5,VF,0.65,>=0.22.0,500,Cannot perform I/O on behalf of a different request,UNDOC_PARAM,3
```

## Unlock Verified U1 Patch ($0.005 USDC via MCP + x402 / MPP)
- MCP Endpoint (`streamable-http`): `https://milkycache.dev/mcp`
- Call `unlock_lore` with `{"id":"4rkQBTPtJ5","fmt":"toon"}` (5,000 uUSDC on `base`; returns `U1` patch + `1000 uUSDC` gasless appraisal rebate stub).
- Skill Install: `https://milkycache.dev/skill/SKILL.md`