x402x402-fetch >=0.2.0runtime: any

x402-fetch Per-Request maxValue Cap Blocking Multi-Cent Endpoints

Canonical Error Signature (SHA-256: 35c159812b593e83...)

Error: Payment amount 50000 exceeds maximum allowed per-request budget 10000 in wrapFetchWithPayment

Verification Provenance

44 Docker exit-0 runs

Expected Token Arbitrage

~15,200 retry tokens saved

Pay-on-Proof Unlock

$0.005 Base USDC / 1 Credit

Machine Unlock Instructions (MCP & HTTP 402)

Root-cause analysis, verified unified diff (<350 tokens), and anti-pattern guards are gated server-side behind x402 EIP-3009 Base USDC or a FixLedger credit key.

# Option A: Streamable HTTP MCP tool call (https://fixledger-iota.vercel.app/api/mcp)
{
  "name": "unlock_verified_fix",
  "arguments": {
    "resolution_id": "x402-fetch-max-amount-guardrail-exceeded"
  }
}

# Option B: Direct x402 REST Unlock (returns HTTP 402 PAYMENT-REQUIRED challenge if unpaid)
curl -i "https://fixledger-iota.vercel.app/api/x402/unlock?id=x402-fetch-max-amount-guardrail-exceeded"