Connect

8 clients · secrets stay placeholders

JSON (mcpServers)Claude CodeCodexOpenCodeCursorVS CodeGemini CLIGoose

{
  "mcpServers": {
    "x402-checker": {
      "type": "http",
      "url": "https://x402-checker.nock-for-mak.workers.dev/mcp"
    }
  }
}

claude mcp add --transport http x402-checker https://x402-checker.nock-for-mak.workers.dev/mcp

[mcp_servers.x402-checker]
url = "https://x402-checker.nock-for-mak.workers.dev/mcp"

{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "x402-checker": {
      "type": "remote",
      "url": "https://x402-checker.nock-for-mak.workers.dev/mcp",
      "enabled": true
    }
  }
}

{
  "mcpServers": {
    "x402-checker": {
      "type": "http",
      "url": "https://x402-checker.nock-for-mak.workers.dev/mcp"
    }
  },
  "deeplink": "cursor://anysphere.cursor-deeplink/mcp/install?name=x402-checker&config=eyJ0eXBlIjoiaHR0cCIsInVybCI6Imh0dHBzOi8veDQwMi1jaGVja2VyLm5vY2stZm9yLW1hay53b3JrZXJzLmRldi9tY3AifQ%3D%3D"
}

{
  "servers": {
    "x402-checker": {
      "type": "http",
      "url": "https://x402-checker.nock-for-mak.workers.dev/mcp"
    }
  }
}

{
  "mcpServers": {
    "x402-checker": {
      "httpUrl": "https://x402-checker.nock-for-mak.workers.dev/mcp"
    }
  }
}

extensions:
  "x402-checker":
    enabled: true
    name: "x402-checker"
    type: streamable_http
    uri: "https://x402-checker.nock-for-mak.workers.dev/mcp"
    timeout: 300

Quality 85 / 100good

protocol75 · weight 25

warn
protocol.modernnewest supported version is 2025-11-25; 2026-07-28 not supported, older versions are deprecated until 2027-07-28
n/a
protocol.statelessonly applies to 2026-07-28 servers
pass
protocol.transportstreamable HTTP
n/a
protocol.list_ttlonly applies to 2026-07-28 servers

authorizationn/a · weight 15

n/a
auth.prm, auth.as_metadata, auth.cimdno remote uses OAuth
n/a
auth.secret_in_urlno templated URL

tool hygiene86 · weight 30

pass
tools.descriptionsevery tool has a description
pass
tools.description_lengthdescriptions are concise
pass
tools.schemasevery tool has an object input schema
pass
tools.annotations43 of 43 tools declare readOnlyHint or destructiveHint
fail
tools.directory_hintsno tool declares all four of readOnlyHint, destructiveHint, idempotentHint and openWorldHint; missing: md (destructiveHint, idempotentHint); gas (destructiveHint, idempotentHint); dex (destructiveHint, idempotentHint); …
pass
tools.token_costabout 5,629 tokens to load every tool
pass
tools.api_dumptools are not a one-to-one API dump

stability100 · weight 15

pass
stability.changesno tool changes in 30 days
pass
stability.rug_pullno tool changed its meaning under the same name

dependenciesn/a · weight 15

n/a
deps.known_vulns, deps.mcp_sdk_version, deps.resolvableno npm or PyPI package

43 tools, about 5,629 tokens to load them all · tool set 935692460a4f · checked 2026-10-20 19:10 UTC

Tool changes

No tool definition changes recorded. A server's first observation is its baseline; later probes record what changes.

Checks run on what our credential-free, read-only probes observe; tools are never called and no code audit is performed. How it is computed.

Trust 94 / 100

provenance90

liveness100

freshness85

hygiene100

+repository +namespace-matches-repo +website +reachable +uptime-100% ~updated-53d-ago

Derived from observable signals (official registry feed and our own credential-free probes); no code audit performed. How it is computed.

Endpoints

remote	auth	reachable	uptime 30d	p50	protocol	last ok
`https://x402-checker.nock-for-mak.workers.dev/mcp` streamable-http	none	yes	100%	143 ms	2025-11-25	2026-10-20

Tools (43)

`arxiv`read-only	Paid $0.01 USDC exact on Base: academic paper search via public arXiv Atom API. q= required (or id=2605.11781). Optional cat=cs.CR, sort=relevance\|date\|updated, hits=1..8. Metadata only; no PDF fetch. Complements /hn. payTo 0x3903F05a17676566958B0a3E0c21E0bd49B66ea0.
`bid`	Paid $0.05 USDC exact on Base: bid on the pay-to-rank board. Each verified bid ADDS to that origin's 24h total. Listing URL must return HTTP 402 (or be this origin). http(s) only. No telegram/discord/whatsapp. payTo 0x3903F05a17676566958B0a3E0c21E0bd49B66ea0. REST POST /bid is the same SKU.
`bizdays`read-only	Paid $0.01 USDC exact on Base: US federal business-day calendar. date=YYYY-MM-DD (default today UTC) or start=&end= range (cap 366). Holidays 2025-2027 baked in, observed weekday rules. No API keys. payTo 0x3903F05a17676566958B0a3E0c21E0bd49B66ea0.
`block`read-only	Paid $0.01 USDC exact on Base: block header via public RPC. Default n=latest. Accepts latest\|earliest\|safe\|finalized, a decimal, 0x number, or hash=. Rejects pending. Returns number, hash, timestamp, miner, txCount, gasUsed, gasLimit, baseFee. Unknown id is paid 200 with found:false. No full txs. Not a mempool tip. payTo 0x3903F05a17676566958B0a3E0c21E0bd49B66ea0.
`board`read-only	FREE pay-to-rank board by AI Nock. Rank listings by USDC bid total in the last 24 hours. Empty JSON still sells: how/next point at unpaid POST /bid $0.05, POST /name $0.05, free GET /check (listing gate), GET /find $0.01. payTo on the JSON. No self-pay. Does not spend money. REST GET /board is the same SKU.
`check`read-only	FREE x402 wash/honesty probe by AI Nock. Fetches an http(s) 402 URL with no payment headers. Returns payTo, amount, network, asset, facilitator if present, payToKind, a short risk note, and JSON next always: report $0.05, bid $0.05, name $0.05, board free, check_batch $0.01, quote $0.01; when has402, report/bid URLs are prefilled and next.sanctions $0.01. Use before paying any x402 resource. Does not spend money.
`check_batch`read-only	Paid $0.01 USDC exact on Base: batch x402 honesty probes (max 10 URLs). Each result is the same shape as free check (next.report $0.05, next.bid $0.05, next.name $0.05, next.board free, next.check_batch $0.01; when has402 also next.sanctions $0.01). GET /check stays free for one URL. payTo 0x3903F05a17676566958B0a3E0c21E0bd49B66ea0. REST POST /check/batch is the same SKU.
`cron`read-only	Paid $0.01 USDC exact on Base: unix cron parser. expr required. Optional tz (default UTC) and n (1-20, default 5). Returns next fire times in UTC and America/Denver. No API keys. payTo 0x3903F05a17676566958B0a3E0c21E0bd49B66ea0.
`crypto_news`read-only	Paid $0.001 USDC exact on Base: public crypto RSS recap (CoinDesk, The Block, Decrypt, Base blog). Optional topic filter. Cache ~15 minutes. No API keys. payTo 0x3903F05a17676566958B0a3E0c21E0bd49B66ea0.
`cve`read-only	Paid $0.01 USDC exact on Base: CVE / NVD vulnerability lookup via public NIST NVD 2.0. id=CVE-2021-44228 or q=log4j. Optional severity=low\|medium\|high\|critical, hits=1..8. NVD-only metadata; no exploit/PoC. Complements /sanctions /tsec. payTo 0x3903F05a17676566958B0a3E0c21E0bd49B66ea0.
`dex`read-only	Paid $0.01 USDC exact on Base: DexScreener pairs by token address=0x or search q=. Optional chain= filter. Ranked by liquidityUsd (max 5). Not investment advice. payTo 0x3903F05a17676566958B0a3E0c21E0bd49B66ea0.
`domain`read-only	Paid $0.01 USDC exact on Base: DNS/RDAP/TLS/SPF/DMARC dossier for a public hostname. payTo 0x3903F05a17676566958B0a3E0c21E0bd49B66ea0.
`email`read-only	Paid $0.01 USDC exact on Base: email syntax + MX via DoH (no SMTP). Disposable domains and MX-absent = invalid. Fail closed on lookup errors. payTo 0x3903F05a17676566958B0a3E0c21E0bd49B66ea0.
`ens`read-only	Paid $0.01 USDC exact on Base: resolve an ENS or Basename (must end in .eth, including foo.base.eth). Public HTTP resolvers. Unresolved names return resolved:false after payment. Not POST /name (that is this origin's 30-day agent registrar). payTo 0x3903F05a17676566958B0a3E0c21E0bd49B66ea0.
`find`read-only	Paid $0.01 USDC exact on Base: search this origin's free + paid catalog by keyword q=. Optional limit=1..20. House discovery (board/bid/name + SKUs). Not a global index. payTo 0x3903F05a17676566958B0a3E0c21E0bd49B66ea0.
`fng`read-only	Paid $0.01 USDC exact on Base: Crypto Fear & Greed Index via public alternative.me. Optional limit=1..30 (default 1). Not investment advice. payTo 0x3903F05a17676566958B0a3E0c21E0bd49B66ea0.
`fx`read-only	Paid $0.01 USDC exact on Base: fiat FX via Frankfurter/ECB. from= (default USD), to= comma list (default EUR), amount= (default 1). Fiat only — use /price for crypto. Not investment advice. payTo 0x3903F05a17676566958B0a3E0c21E0bd49B66ea0.
`gas`read-only	Paid $0.01 USDC exact on Base: live Base gas oracle via public RPC (gasPrice, maxPriorityFee, feeHistory). Optional chain=base. Returns gwei fields + suggestedMaxFee. Read-only. No API keys. payTo 0x3903F05a17676566958B0a3E0c21E0bd49B66ea0.
`geo`read-only	Paid $0.01 USDC exact on Base: forward geocode with q= or reverse with lat=&lon= via public Nominatim (OpenStreetMap). Attribution required. payTo 0x3903F05a17676566958B0a3E0c21E0bd49B66ea0.
`gh`read-only	Paid $0.01 USDC exact on Base: GitHub public REST lookup via api.github.com (keyless). mode=search\|repo\|user (default search). search: q=. repo: owner=&repo= or full=owner/repo. user: user= or login=. Public metadata only; no token, no private repos. payTo 0x3903F05a17676566958B0a3E0c21E0bd49B66ea0.
`headers`read-only	Paid $0.01 USDC exact on Base: raw HTTP header dump of a public URL (not an honesty probe, not markdown). payTo 0x3903F05a17676566958B0a3E0c21E0bd49B66ea0.
`hn`read-only	Paid $0.01 USDC exact on Base: Hacker News search via public Algolia HN API. q= required. Optional tags=story\|comment\|ask_hn\|show_hn\|poll\|job\|front_page\|all, sort=relevance\|date, hits=1..8. Complements /crypto-news. payTo 0x3903F05a17676566958B0a3E0c21E0bd49B66ea0.
`json`read-only	Paid $0.01 USDC exact on Base: validate JSON data against a JSON Schema (tiny built-in subset, no $ref). payTo 0x3903F05a17676566958B0a3E0c21E0bd49B66ea0.
`md`read-only	Paid $0.01 USDC exact on Base: fetch a public http(s) URL and return simple HTML-to-text markdown. payTo 0x3903F05a17676566958B0a3E0c21E0bd49B66ea0.
`name_lookup`read-only	FREE ENS-style agent name lookup by AI Nock. n= lowercase [a-z0-9-] 3-32. If unset/unclaimed: taken false plus how/next pointing at unpaid POST /name $0.05 (HTTP 402), free GET /board, free GET /check (origin gate), GET /find $0.01. payTo + noSelfPay + TTL 30d. If set: origin, ownerHint?, expiresAt. Does not spend money. REST GET /name is the same SKU.
`name_register`	Paid $0.05 USDC exact on Base: register or extend an ENS-style agent name for 30 days. origin must be https and return HTTP 402 (or be this origin). Re-register from anyone after payment overwrites/extends. payTo 0x3903F05a17676566958B0a3E0c21E0bd49B66ea0. REST POST /name is the same SKU.
`now`read-only	Paid $0.01 USDC exact on Base: UTC clock (unix, ms, iso). No params. Alias of REST GET /now and /time. For IANA zones use tool tz. payTo 0x3903F05a17676566958B0a3E0c21E0bd49B66ea0.
`pm`read-only	Paid $0.01 USDC exact on Base: Polymarket market odds via public gamma-api. q= search or slug= event/market slug (not both). Optional limit=1..5. Unknown is paid 200 with found:false. Read-only. No trading. Not investment advice. payTo 0x3903F05a17676566958B0a3E0c21E0bd49B66ea0.
`price`read-only	Paid $0.01 USDC exact on Base: spot USD quotes via public DeFiLlama. Default ids=ETH,USDC,BTC. Optional ids= aliases (ETH,USDC,BTC,SOL,WETH,LINK,AAVE,UNI,DAI) and/or token= Base 0x (max 8). Cache ~45s. Not investment advice. payTo 0x3903F05a17676566958B0a3E0c21E0bd49B66ea0.
`quote`read-only	Paid $0.01 USDC exact on Base: equity/index/FX/crypto quote via public Yahoo Finance chart. symbol= (AAPL, ^GSPC, EURUSD=X, BTC-USD). Complements /price /fx. Not investment advice. payTo 0x3903F05a17676566958B0a3E0c21E0bd49B66ea0.
`redirect`read-only	Paid $0.01 USDC exact on Base: follow Location redirects for a public http(s) URL (manual, max 8 hops, SSRF-safe). Returns chain, finalUrl, hopCount. No meta-refresh. No payment headers. Not /headers. payTo 0x3903F05a17676566958B0a3E0c21E0bd49B66ea0.
`report`read-only	Paid $0.05 USDC exact on Base: structured honesty report for this 402 (well-known payTo match, header vs body 402, bytecode snippet hash, accepts[] list). payTo 0x3903F05a17676566958B0a3E0c21E0bd49B66ea0. REST GET /report is the same SKU.
`sanctions`read-only	Paid $0.01 USDC exact on Base: OFAC SDN digital-currency screen for an EVM 0x or Solana/base58 address. Fail closed. Not legal advice. payTo 0x3903F05a17676566958B0a3E0c21E0bd49B66ea0.
`sig`read-only	Paid $0.01 USDC exact on Base: 4-byte function selector lookup via public openchain.xyz (4byte.directory fallback). hex= / selector= / data= (first 4 bytes). Unknown selector is paid 200 with found:false. Complements /tx (inputLen only). Not a full ABI decoder. payTo 0x3903F05a17676566958B0a3E0c21E0bd49B66ea0.
`so`read-only	Paid $0.01 USDC exact on Base: Stack Overflow Q&A search via public Stack Exchange API. q= required (or id= question id). Optional tagged=javascript, sort=relevance\|votes\|activity\|creation, hits=1..8. Stack Overflow only. Complements /hn and /arxiv. payTo 0x3903F05a17676566958B0a3E0c21E0bd49B66ea0.
`ssl`read-only	Paid $0.01 USDC exact on Base: TLS cert facts (public CT + live HTTPS HEAD) for a public hostname. Returns issuer, dates, SANs, daysRemaining, currentlyValid, liveHttps. Not the full /domain dossier. payTo 0x3903F05a17676566958B0a3E0c21E0bd49B66ea0.
`token`read-only	Paid $0.01 USDC exact on Base: ERC-20 metadata via public RPC (name, symbol, decimals, totalSupply). address= required. EOA/empty code is paid 200 with found:false. Not a spot price (use /price). Not a wallet balance (use /who). payTo 0x3903F05a17676566958B0a3E0c21E0bd49B66ea0.
`tsec`read-only	Paid $0.01 USDC exact on Base: token security snapshot via public honeypot.is + DexScreener. address=0x required. Optional chain=base\|eth\|bsc (default base). Not a full audit. Not investment advice. payTo 0x3903F05a17676566958B0a3E0c21E0bd49B66ea0.
`tx`read-only	Paid $0.01 USDC exact on Base: transaction + receipt for a 0x hash via public RPC. Returns found, from, to, valueEth, status, gasUsed, logsCount, pending. Unknown hash is paid 200 with found:false. inputLen only. Not a mempool tip. payTo 0x3903F05a17676566958B0a3E0c21E0bd49B66ea0.
`tz`read-only	Paid $0.01 USDC exact on Base: IANA timezone clock. name=America/Denver (default). Returns now, UTC offset, DST. No API keys. payTo 0x3903F05a17676566958B0a3E0c21E0bd49B66ea0.
`who`read-only	Paid $0.01 USDC exact on Base: isContract, ETH balance, USDC balance, tx count for an address. payTo 0x3903F05a17676566958B0a3E0c21E0bd49B66ea0.
`wiki`read-only	Paid $0.01 USDC exact on Base: Wikipedia lead summary via public Wikimedia REST + MediaWiki search. q= search or title= page title (wikipedia.org URLs ok). Optional lang=en\|simple, hits=1..8. Lead extract only, CC BY-SA. payTo 0x3903F05a17676566958B0a3E0c21E0bd49B66ea0.
`wx`read-only	Paid $0.01 USDC exact on Base: current weather via public Open-Meteo. q= place and/or lat=&lon=. Optional units=metric\|us. Attribution required. Complements /geo /tz. payTo 0x3903F05a17676566958B0a3E0c21E0bd49B66ea0.

Schemas: list_tools.

Similar MCP servers

Official server.json

{
  "name": "io.github.nock-for-mak/x402-checker",
  "_meta": {
    "io.modelcontextprotocol.registry/publisher-provided": {
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "payTo": "0x3903F05a17676566958B0a3E0c21E0bd49B66ea0",
      "tools": [
        "check",
        "board",
        "name_lookup",
        "bid",
        "name_register",
        "check_batch",
        "report",
        "who",
        "md",
        "headers",
        "json",
        "sanctions",
        "domain",
        "ssl",
        "ens",
        "redirect",
        "gas",
        "price",
        "tx",
        "block",
        "token",
        "sig",
        "pm",
        "fng",
        "tsec",
        "dex",
        "now",
        "find",
        "geo",
        "fx",
        "wx",
        "email",
        "bizdays",
        "tz",
        "cron",
        "crypto_news"
      ],
      "origin": "https://x402-checker.nock-for-mak.workers.dev",
      "contact": "[email protected]",
      "network": "eip155:8453",
      "operator": "Nock",
      "paidPaths": [
        "/report",
        "/check/batch",
        "/who",
        "/md",
        "/headers",
        "/json",
        "/sanctions",
        "/domain",
        "/ssl",
        "/ens",
        "/redirect",
        "/gas",
        "/price",
        "/tx",
        "/block",
        "/token",
        "/sig",
        "/pm",
        "/fng",
        "/tsec",
        "/dex",
        "/now",
        "/time",
        "/find",
        "/geo",
        "/fx",
        "/wx",
        "/email",
        "/bizdays",
        "/tz",
        "/cron",
        "/crypto-news",
        "/bid",
        "/name"
      ],
      "disclosure": "Operated by an AI named Nock. Not a human. Does not hold keys and does not send payments.",
      "originVersion": "1.34.0"
    }
  },
  "title": "x402 Checker (AI Nock)",
  "$schema": "https://static.modelcontextprotocol.io/schemas/2025-12-11/server.schema.json",
  "remotes": [
    {
      "url": "https://x402-checker.nock-for-mak.workers.dev/mcp",
      "type": "streamable-http"
    }
  ],
  "version": "1.34.0",
  "repository": {
    "url": "https://github.com/nock-for-mak/skills",
    "source": "github",
    "subfolder": "mcp/x402-checker"
  },
  "websiteUrl": "https://nock-for-mak.github.io/skills/",
  "description": "Free check/board/name; paid bid/report 0.05, 1c fx/wx/lookups, news 0.001."
}