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Listing ID: x402:e620c3e007854264d952d4da8a9f6c20ecf6a802ece63c389f4e287d6bd00568

Call before paying an unfamiliar x402 endpoint, or to pick between providers. $0.02, usually <1 s plus one probe: live unpaid probe (status, lat…

Finance · inferred

402MCP.org — HTTP 402 & Agent Payment Registry

Source: MCP Registry

Registry record: org.402mcp/registry

Decode HTTP 402 challenges (L402, x402, MPP) and choose agent payment rails from an open registry.

Listing ID: x402:d202adea28788ff7dbdf181883e0fd50261f934edb4416333f958b2a39a4f2ba

Crypto price check: the current spot price of Bitcoin (BTC), Ethereum (ETH), Solana (SOL) or any token ticker in USD, cross-checked across five …

Listing ID: x402:340696df005122504d8c53ee30b7f2b5e5d54700ff7efbd7020d90f8879bd59a

Classifieds board for AI agents: post a listing or classified ad (job posting, service offer, agent service, local service, wanted ad). Publish …

Listing ID: x402:95499ed2aa9096bf33a8339caff40cf5d45ad6bfa8ac88b281ec2675a6c76e67

Payment integration check for 0.001 USDC; no external data lookup. Returns time, rail, network mode and free/paid capabilities. HTTP payment opt…

Listing ID: x402:1bdbc2ecef07d069f012b96878749ee17c58e086dd8bf4253e7f8979b8144893

Catalog snapshot: every site in the 402registry catalog of sites verified visible to AI crawlers, as one JSON file rendered at purchase, every r…

Listing ID: x402:362711902954aba1139bcfe7a4f315f048d209f066d8d1e330c5fc126370efb1

AI crawler visibility audit: is your website visible to AI crawlers (GPTBot, ClaudeBot, PerplexityBot, OAI-SearchBot) so ChatGPT, Claude and Per…

Listing ID: x402:276d97fbcb12760edd6884e436795b3d749ac86b22ba4be1af1600e1bff1cea2

Ethereum mainnet balances of an address at the latest block, read directly from a full node: ETH plus USDC, USDT, DAI, WETH, WBTC, stETH, LINK a…

Listing ID: x402:6ad18d344f9192853543e1ecbc8e548043013fdb3b768161af7202cbfb113b0c

Ethereum mainnet JSON-RPC from an independently operated full node. One call per payment, no account or API key. Serves eth_, net_ and web3_ met…

Listing ID: x402:a777be948b876ef713f33e24c392c10daeb271541a3aa41d462f8b4306e522b3

Resolve ENS on Ethereum mainnet from a full node: name to address (e.g. vitalik.eth) or address to primary name (reverse record, verified forwar…

Finance · inferred

402sentinel-mcp

Source: MCP Registry

Registry record: io.github.kaditang/402sentinel-mcp

DEPRECATED: hosted 402Sentinel retired 2026-10-31. Client for x402 payment-safety checks.

Listing ID: x402:46e6de1b24848424998c822d08b18903273646ac6a5ab0c864c3334c3e17c230

Is this payment address safe to pay? DEEP version — deep counterparty assessment: same shape as /api/assess but scans more on-chain settlement h…