paylog.dev now supports x402 on Base

Overview

paylog.dev now supports x402 payments (EIP-3009) on Base mainnet.

Until now, paylog only tracked spending on Tempo via MPP. With this update you can also track Base USDC transfers made through x402-enabled services.

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New endpoint

GET /api/v1/x402/report

Returns x402 spending history for a Base wallet. The endpoint itself is x402-protected — it costs $0.01 USDC per call.

GET https://paylog.dev/api/v1/x402/report?wallet=0x...
GET https://paylog.dev/api/v1/x402/report?wallet=0x...&chain=all

Parameters:

Parameter	Required	Description
wallet	✅	Base wallet address
chain	❌	base (default) or all

chain=all returns a combined report that merges Tempo MPP and Base x402 spend into a single response.

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Example response (chain=base)

{
  "chain": "base",
  "wallet": "0x...",
  "total_spent_usd": 0.5,
  "by_service": [
    { "name": "Browserbase", "url": "browserbase.com", "spent": 0.3, "txns": 30 },
    { "name": "Allium",      "url": "alliumlabs.xyz",  "spent": 0.2, "txns": 20 }
  ],
  "other": { "total_usd": 0.0, "txns": 0, "addresses": [] },
  "daily_breakdown": [...]
}

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CLI usage

v0.3.0 of @kakedashi/paylog adds a --chain flag:

# Base only
EVM_PRIVATE_KEY=0x... npx @kakedashi/paylog report --chain base

# MPP + Base combined
EVM_PRIVATE_KEY=0x... npx @kakedashi/paylog report --chain all

# Tempo MPP only (unchanged)
npx @kakedashi/paylog report --days 7

x402 payments require an EVM private key on Base mainnet. Set EVM_PRIVATE_KEY or pass --private-key. The wallet address is derived automatically from the key.

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Supported services

Over 100 x402-enabled service addresses are mapped (collected from the Bazaar / CDP discovery API):

• Browserbase
• Allium
• Parallel
• Pinata IPFS
• Hugen
• 100+ more

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How it works

1. Fetch the wallet's Base USDC transfer history via alchemy_getAssetTransfers.
2. Resolve recipient addresses against the services-x402.json map.
3. Aggregate by service and by day and return.

Base block time is ~2 seconds. The endpoint always fetches the full all-time history (fromBlock=0).

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Pricing

Endpoint	Price	Protocol
/api/v1/report	$0.001 USDC	MPP (Tempo)
/api/v1/x402/report	$0.01 USDC	x402 (Base mainnet)
/api/v1/insights	$0.001 USDC	MPP (Tempo)

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Next on the list: date filtering for the x402 report and a Base insights endpoint.