Checkpoint402
Pay-per-call tx explainer, DeFi yields, token safety, SEC 8-K and OFAC data via x402 (USDC on Base).
Connect it
Settings → Connectors → Add custom connector
URL: https://api.checkpoint402.com/mcpSettings → Apps & Connectors → Advanced → Developer mode
Create connector with URL: https://api.checkpoint402.com/mcp{
"mcpServers": {
"checkpoint402": {
"url": "https://api.checkpoint402.com/mcp"
}
}
}claude mcp add --transport http checkpoint402 https://api.checkpoint402.com/mcp{
"servers": {
"checkpoint402": {
"type": "http",
"url": "https://api.checkpoint402.com/mcp"
}
}
}6 tools, verified live
list_servicesread-onlyFree. Lists every Checkpoint402 data service with its price, inputs, example output link and how payment works.
explain_transactionread-onlyPaid: $0.03 USDC per successful call via x402 (not charged on errors). Explains any Base or Ethereum transaction in plain English: who sent what to whom, which tokens/NFTs moved, the function called, success/failure and fee — plus the structured decoded data.
find_defi_yieldsread-onlyPaid: $0.05 USDC per successful call via x402 (not charged on errors). Top DeFi yields across 16k+ pools, filtered by asset, chain, minimum TVL and risk, each with a simple explained risk tier (outlier APY, thin TVL, reward-heavy, IL exposure). Data: DefiLlama.
new_token_safety_feedread-onlyPaid: $0.10 USDC per successful call via x402 (not charged on errors). Newly launched token pools on Base, Ethereum or BSC, each with a 0-100 safety score and explicit red flags (honeypot, unverified code, mintable, owner powers, high tax, unlocked liquidity, whale concentration). Data: GeckoTerminal + GoPlus.
sec_8k_company_eventsread-onlyPaid: $0.10 USDC per successful call via x402 (not charged on errors). Latest SEC 8-K filings — market-wide within minutes of filing, or for one ticker — with each item code translated to plain English, high-impact events flagged (earnings, CEO changes, M&A, bankruptcy, cyber incidents) and AI summaries of the filing text.
ofac_sanctions_screenread-onlyPaid: $0.05 USDC per successful call via x402 (not charged on errors). Screens a person/company name (fuzzy, alias-aware) and/or a crypto wallet address against the US Treasury OFAC SDN list, refreshed twice daily, including the extended-remarks file where most sanctioned crypto addresses are listed.
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