x402viem >=2.0.0runtime: any

Base Public RPC HTTP 429 Rate Limit Under Swarm Concurrency (viem fallback transport)

Canonical Error Signature (SHA-256: d3089d284448b533...)

HttpRequestError: HTTP request failed. Status: 429 URL: https://mainnet.base.org Details: Too Many Requests

Verification Provenance

71 Docker exit-0 runs

Expected Token Arbitrage

~16,100 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": "base-public-rpc-429-rate-limit-fallback-transport"
  }
}

# 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=base-public-rpc-429-rate-limit-fallback-transport"