x402 Checker (AI Nock)
REMOTE · X402-CHECKER.NOCK-FOR-MAK.WORKERS.DEV
Free check/board/name; paid bid/report 0.05, 1c fx/wx/lookups, news 0.001.
Available components
Last scanned (21 hours ago)
Scores higher than 62% of remote servers
Reachable. Last reached 4 Nov 2026.
Category Search and Retrieval
How this component scores in each security and reliability category. Every signal is checked automatically against the live server, and we only credit what we can confirm. How we score → Why this is hard to score →
Endpoint Security46
- The endpoint's TLS certificate is valid, in date, and uses a strong key. View diagnostics → Pass
- Authorisation not fully verified: no authorisation is required to call this server, and 2 tool(s) never declared a destructiveHint. The MCP spec treats an absent hint as destructive by default, so we cannot call this surface safe. See how to fix → View diagnostics → Unverified
- HTTPS check failed: the endpoint is reachable over plaintext HTTP. See how to fix → View diagnostics → Fail
- HSTS check failed: the Strict-Transport-Security header is absent. See how to fix → View diagnostics → Fail
- DNSSEC check failed: this domain isn't protected by DNSSEC. See how to fix → View diagnostics → Fail
Transport & Reachability100
- Verified streamable-http transport via a live MCP handshake. View diagnostics → Pass
Schema Quality & AI Usability73
- AI-judged instruction clarity (excellent).Pass
- Context-footprint check failed: tool/resource definitions use about 6033 tokens (~140/item across 43 items; 43 tools + 0 resources), over budget; trim descriptions and params. See how to fix → Fail
- Usage-examples check failed: none of the tools include examples. See how to fix → Fail
Stability & Change Management100
- No destabilizing schema changes in the last 30 days.Pass
Tool Coverage100
- 100% of tools have a non-trivial description (not blank, and not just the tool's name).Pass
- 100% of tool parameters carry a description.Pass
Tool Safety100
- No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.Pass
- We read all 43 captured tool definition(s), and no name or description among them implies an irreversible operation.Pass
- An AI judge read all 44 captured unit(s) of tool text and found none that tries to manipulate the model reading it.Pass
Capabilities100
- Implements a supported MCP spec version (2025-11-25); the latest is 2026-07-28.Pass
Every change we have recorded for this component, newest first. Security-relevant changes are always shown. ▲ marks a change for the better, ▼ a change for the worse; unmarked changes are neutral.
- 28 Sept 26 0
- We updated how we score, so this day's move reflects our rubric, not a change to the server See what changed → functional
- 25 Sept 26 0
- We updated how we score, so this day's move reflects our rubric, not a change to the server See what changed → functional
- 18 Sept 26 0
- Stability: 0.97 → pass security
- 29 Aug 26 0
- The server rewrote its instructions, which are the text every model session reads security
- Tool “check” rewrote its description, which is the text the model reads security
- Schema quality: 4830 → 6033 ▼ functional
- Server version: 1.35.0 → 1.41.0 functional
- New tool “arxiv” functional
- New tool “cve” functional
- New tool “gh” functional
- New tool “hn” functional
- New tool “so” functional
- New tool “wiki” functional
- 28 Aug 26 0
- The server rewrote its instructions, which are the text every model session reads security
- Tool “board” rewrote its description, which is the text the model reads security
- Tool “check” rewrote its description, which is the text the model reads security
- Tool “check_batch” rewrote its description, which is the text the model reads security
- Tool “name_lookup” rewrote its description, which is the text the model reads security
- Schema quality: 2270 → 4830 ▼ functional
- Schema quality: 2270 → 3432 ▼ functional
- Server version: 1.25.0 → 1.35.0 functional
- Server version: 1.16.1 → 1.25.0 functional
- New tool “dex” functional
- New tool “find” functional
- New tool “fng” functional
- New tool “fx” functional
- New tool “geo” functional
- New tool “now” functional
- New tool “pm” functional
- New tool “quote” functional
- New tool “tsec” functional
- New tool “wx” functional
- New tool “block” functional
- New tool “ens” functional
- New tool “gas” functional
- New tool “price” functional
- New tool “redirect” functional
- New tool “sig” functional
- New tool “ssl” functional
- New tool “token” functional
- New tool “tx” functional
- 27 Aug 26 0
- The server rewrote its instructions, which are the text every model session reads security
- Schema quality: 1430 → 2270 ▼ functional
- Server version: 1.12.0 → 1.16.1 functional
- New tool “bid” functional
- New tool “board” functional
- New tool “cron” functional
- New tool “crypto_news” functional
- New tool “name_lookup” functional
- New tool “name_register” functional
- 26 Aug 26 0
- We updated how we score, so this day's move reflects our rubric, not a change to the server See what changed → functional
- 20 Aug 26 0
- The server rewrote its instructions, which are the text every model session reads security
- Stability: unverified → 0.03 ▲ functional
- Schema quality: good → excellent functional
- Server version: 1.11.2 → 1.12.0 functional
- New tool “tz” functional
Diagnostic detail from the automated scan of this channel: what the scanner observed at each step, so you can see exactly where a check passed or failed. It is informational only and never changes the trust score.
Captured 4 Nov 2026 · Probed https://x402-checker.nock-for-mak.workers.dev/mcp
TLS valid
Negotiated TLS 1.3 with TLS_AES_128_GCM_SHA256 .
| Subject | Issuer | Valid from | Valid until | Key | Signature | Serial |
|---|---|---|---|---|---|---|
| CN=nock-for-mak.workers.dev | CN=WE1,O=Google Trust Services,C=US | 17 Oct 2026 | 16 Jan 2027 | ECDSA 256 | ECDSA-SHA256 | a9f9cc547da79251331d1c5a5e130ce |
| SANs: nock-for-mak.workers.dev, *.nock-for-mak.workers.dev | ||||||
| CN=WE1,O=Google Trust Services,C=US (CA) | CN=GTS Root R4,O=Google Trust Services LLC,C=US | 13 Dec 2023 | 20 Feb 2029 | ECDSA 256 | ECDSA-SHA384 | 7ff31977972c224a76155d13b6d685e3 |
| CN=GTS Root R4,O=Google Trust Services LLC,C=US (CA) | CN=GlobalSign Root CA,OU=Root CA,O=GlobalSign nv-sa,C=BE | 15 Nov 2023 | 28 Jan 2028 | ECDSA 384 | SHA256-RSA | 7fe530bf331343bedd821610493d8a1b |
Background: What to check on a remote MCP endpoint →
DNSSEC insecure
Validation of x402-checker.nock-for-mak.workers.dev. — Not signed
| Zone | DS | Keys | Algorithms | Outcome |
|---|---|---|---|---|
| . | trust_anchor | 20326, 38696 | 8, 8 | Verified |
| dev. | present | 60074 | 8 | Verified |
| workers.dev. | absent | Unsigned (proven) parent-signed NSEC/NSEC3 proves an unsigned delegation |
Authentication No authorisation required
The endpoint answered without asking for a token. Anyone who knows the URL can reach it.
| Result | No authorisation required |
|---|---|
| HTTP status | 200 |
Background: How OAuth 2.1 works in the 2026 MCP spec →
Transports 2 probes
| Transport | URL | Outcome | Status | Location |
|---|---|---|---|---|
| streamable-http | https://x402-checker.nock-for-mak.workers.dev/mcp | Verified | 200 | |
| http (plaintext) | http://x402-checker.nock-for-mak.workers.dev/mcp | Served over HTTP | 200 |
The tools this component advertises to a client, with an estimated token cost for each. Expand a tool to see its parameters and schema. The per-tool counts are indicative and are not scored directly; the schema's total context footprint is one signal in Schema Quality & AI Usability. A tool's description is untrusted text the model reads on every call, which is what makes this list a security surface and not just an inventory: how tool poisoning works →
arxiv ~205
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.
| Name | Type | Req | Description |
|---|---|---|---|
| cat | string | – | arXiv category, e.g. cs.CR or cs.AI. |
| hits | integer | – | 1..8 results (default 5). |
| id | string | – | arXiv id (2605.11781 or arXiv:2605.11781). |
| q | string | – | Search phrase (aliases query= search=). Required unless id=. |
| sort | string | – | relevance (default), date, or updated. |
No output schema declared.
No examples provided.
bid ~187
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.
| Name | Type | Req | Description |
|---|---|---|---|
| description | string | – | Optional one-line description. Max 200 chars. |
| name | string | – | Optional short name. Max 80 chars. |
| slot | string | – | Optional slot. Max 40 chars. |
| topic | string | – | Optional topic. Max 40 chars. |
| url | string | yes | http(s) listing URL that returns HTTP 402, or this origin. |
No output schema declared.
No examples provided.
bizdays ~165
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.
| Name | Type | Req | Description |
|---|---|---|---|
| date | string | – | YYYY-MM-DD. Optional; default today UTC. |
| end | string | – | Range end YYYY-MM-DD (inclusive). Requires start. Cap 366 days. |
| start | string | – | Range start YYYY-MM-DD (inclusive). Requires end. |
| tz | string | – | IANA timezone. Default America/Denver. |
No output schema declared.
No examples provided.
block ~161
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.
| Name | Type | Req | Description |
|---|---|---|---|
| hash | string | – | Optional 0x-prefixed 32-byte block hash. |
| n | string | – | Block tag or number. Default latest. |
No output schema declared.
No examples provided.
board ~99
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.
Input schema present but exposes no named parameters.
No output schema declared.
No examples provided.
check ~152
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.
| Name | Type | Req | Description |
|---|---|---|---|
| url | string | yes | http(s) URL to inspect. No payment headers are sent to the target. |
No output schema declared.
No examples provided.
check_batch ~170
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.
| Name | Type | Req | Description |
|---|---|---|---|
| urls | array | yes | 1-10 public http(s) URLs. Same SSRF-safe rules as check. No payment headers are sent to the targets. |
No output schema declared.
No examples provided.
cron ~148
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.
| Name | Type | Req | Description |
|---|---|---|---|
| expr | string | yes | Unix crontab 5-field (minute hour day-of-month month day-of-week). |
| n | integer | – | Next fire count 1-20. Default 5. |
| tz | string | – | IANA timezone the cron is interpreted in. Default UTC. |
No output schema declared.
No examples provided.
crypto_news ~102
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.
| Name | Type | Req | Description |
|---|---|---|---|
| topic | string | – | Optional case-insensitive filter on title/summary/source. Max 80 chars. |
No output schema declared.
No examples provided.
cve ~206
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.
| Name | Type | Req | Description |
|---|---|---|---|
| hits | integer | – | 1..8 results (default 5). |
| id | string | – | CVE id (CVE-YYYY-NNNN). Aliases cve= cve_id=. Required unless q=. |
| q | string | – | Keyword search (aliases query= search= keyword=). Required unless id=. |
| severity | string | – | low, medium, high, or critical. |
No output schema declared.
No examples provided.
dex ~129
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.
| Name | Type | Req | Description |
|---|---|---|---|
| address | string | – | Token contract 0x + 40 hex (token mode). |
| chain | string | – | Optional chain filter (default base for address mode). |
| q | string | – | Search query (search mode). |
No output schema declared.
No examples provided.
domain ~83
Paid $0.01 USDC exact on Base: DNS/RDAP/TLS/SPF/DMARC dossier for a public hostname. payTo 0x3903F05a17676566958B0a3E0c21E0bd49B66ea0.
| Name | Type | Req | Description |
|---|---|---|---|
| host | string | yes | Public DNS hostname (not a URL, not an IP). |
No output schema declared.
No examples provided.
email ~96
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.
| Name | Type | Req | Description |
|---|---|---|---|
| addr | string | yes | Email address (local@public-hostname). Max 254 chars. |
No output schema declared.
No examples provided.
ens ~119
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.
| Name | Type | Req | Description |
|---|---|---|---|
| name | string | yes | ENS name ending in .eth (vitalik.eth, foo.base.eth). |
No output schema declared.
No examples provided.
find ~120
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.
| Name | Type | Req | Description |
|---|---|---|---|
| limit | integer | – | Max results 1..20 (default 8). |
| q | string | yes | Search keywords (e.g. gas, token security, board). |
No output schema declared.
No examples provided.
fng ~95
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.
| Name | Type | Req | Description |
|---|---|---|---|
| limit | integer | – | History length 1-30 (default 1 = current). |
No output schema declared.
No examples provided.
fx ~136
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.
| Name | Type | Req | Description |
|---|---|---|---|
| amount | number | – | Amount of from-currency (default 1). |
| from | string | – | Base ISO currency (default USD). |
| to | string | – | Quote ISO currencies, comma-separated (default EUR). |
No output schema declared.
No examples provided.
gas ~105
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.
| Name | Type | Req | Description |
|---|---|---|---|
| chain | string | – | Chain short name. Optional; only base for now. |
No output schema declared.
No examples provided.
geo ~127
Paid $0.01 USDC exact on Base: forward geocode with q= or reverse with lat=&lon= via public Nominatim (OpenStreetMap). Attribution required. payTo 0x3903F05a17676566958B0a3E0c21E0bd49B66ea0.
| Name | Type | Req | Description |
|---|---|---|---|
| lat | number | – | Latitude -90..90 for reverse geocode. |
| lon | number | – | Longitude -180..180 for reverse geocode. |
| q | string | – | Place name for forward geocode (e.g. Denver, CO). |
No output schema declared.
No examples provided.
gh ~229
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.
| Name | Type | Req | Description |
|---|---|---|---|
| full | string | – | owner/repo or github.com/owner/repo URL. |
| hits | integer | – | 1..8 results (default 5). |
| mode | string | – | search (default), repo, or user. |
| owner | string | – | GitHub owner/org. Use with repo=. |
| q | string | – | Repo search query (aliases query= search=). Required for mode=search. |
| repo | string | – | GitHub repository name. Use with owner=. |
| user | string | – | GitHub login (aliases login=). For mode=user. |
No output schema declared.
No examples provided.
headers ~88
Paid $0.01 USDC exact on Base: raw HTTP header dump of a public URL (not an honesty probe, not markdown). payTo 0x3903F05a17676566958B0a3E0c21E0bd49B66ea0.
| Name | Type | Req | Description |
|---|---|---|---|
| url | string | yes | http(s) URL to inspect. No payment headers are sent to the target. |
No output schema declared.
No examples provided.
hn ~180
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.
| Name | Type | Req | Description |
|---|---|---|---|
| hits | integer | – | 1..8 results (default 5). |
| q | string | yes | Search phrase (aliases query= search=). |
| sort | string | – | relevance (default) or date. |
| tags | string | – | story (default), comment, ask_hn, show_hn, poll, job, front_page, or all. |
No output schema declared.
No examples provided.
json ~88
Paid $0.01 USDC exact on Base: validate JSON data against a JSON Schema (tiny built-in subset, no $ref). payTo 0x3903F05a17676566958B0a3E0c21E0bd49B66ea0.
| Name | Type | Req | Description |
|---|---|---|---|
| data | – | yes | JSON instance object or JSON text |
| schema | – | yes | JSON Schema object or JSON text |
No output schema declared.
No examples provided.
md ~86
Paid $0.01 USDC exact on Base: fetch a public http(s) URL and return simple HTML-to-text markdown. payTo 0x3903F05a17676566958B0a3E0c21E0bd49B66ea0.
| Name | Type | Req | Description |
|---|---|---|---|
| url | string | yes | http(s) URL to inspect. No payment headers are sent to the target. |
No output schema declared.
No examples provided.
name_lookup ~156
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 | Type | Req | Description |
|---|---|---|---|
| n | string | – | Agent name to look up (lowercase [a-z0-9-] 3-32). |
| name | string | – | Alias of n. |
No output schema declared.
No examples provided.
name_register ~161
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.
| Name | Type | Req | Description |
|---|---|---|---|
| name | string | yes | lowercase [a-z0-9-] 3-32 chars, no leading/trailing hyphen. |
| origin | string | yes | https URL that returns HTTP 402, or this origin. |
| ownerHint | string | – | Optional short owner hint. Max 80 chars. |
No output schema declared.
No examples provided.
now ~79
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.
Input schema present but exposes no named parameters.
No output schema declared.
No examples provided.
pm ~162
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.
| Name | Type | Req | Description |
|---|---|---|---|
| limit | integer | – | Max markets 1-5 (default 5). |
| q | string | – | Search query (max 80). Use q or slug, not both. |
| slug | string | – | Exact Polymarket event or market slug (lowercase [a-z0-9-]). |
No output schema declared.
No examples provided.
price ~155
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.
| Name | Type | Req | Description |
|---|---|---|---|
| ids | string | – | Comma-separated symbols. Default ETH,USDC,BTC. Max 8. |
| token | string | – | Optional Base ERC-20 0x address. |
No output schema declared.
No examples provided.
quote ~124
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.
| Name | Type | Req | Description |
|---|---|---|---|
| symbol | string | yes | Ticker: equity (AAPL), index (^GSPC), FX (EURUSD=X), crypto (BTC-USD). |
No output schema declared.
No examples provided.
redirect ~106
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.
| Name | Type | Req | Description |
|---|---|---|---|
| url | string | yes | Public http(s) URL to unwrap. |
No output schema declared.
No examples provided.
report ~109
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.
| Name | Type | Req | Description |
|---|---|---|---|
| url | string | yes | http(s) URL to inspect. No payment headers are sent to the target. |
No output schema declared.
No examples provided.
sanctions ~106
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.
| Name | Type | Req | Description |
|---|---|---|---|
| address | string | yes | 0x-prefixed 20-byte EVM address on Base (or Solana/base58 for sanctions). |
No output schema declared.
No examples provided.
sig ~131
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.
| Name | Type | Req | Description |
|---|---|---|---|
| hex | string | yes | 0x-prefixed 4-byte selector, or longer calldata (first 4 bytes used). |
No output schema declared.
No examples provided.
so ~185
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.
| Name | Type | Req | Description |
|---|---|---|---|
| hits | integer | – | 1..8 results (default 5). |
| id | string | – | Stack Overflow question id (digits). |
| q | string | – | Search phrase (aliases query= search=). Required unless id=. |
| sort | string | – | relevance (default), votes, activity, or creation. |
| tagged | string | – | Up to 3 tags, comma-separated. |
No output schema declared.
No examples provided.
ssl ~107
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.
| Name | Type | Req | Description |
|---|---|---|---|
| host | string | yes | Public DNS hostname (not a URL, not an IP). |
No output schema declared.
No examples provided.
token ~123
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.
| Name | Type | Req | Description |
|---|---|---|---|
| address | string | yes | 0x-prefixed 20-byte ERC-20 contract address on Base. |
No output schema declared.
No examples provided.
tsec ~126
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.
| Name | Type | Req | Description |
|---|---|---|---|
| address | string | yes | Token contract 0x + 40 hex. |
| chain | string | – | base, eth, or bsc (default base). |
No output schema declared.
No examples provided.
tx ~121
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.
| Name | Type | Req | Description |
|---|---|---|---|
| hash | string | yes | 0x-prefixed 32-byte transaction hash on Base. |
No output schema declared.
No examples provided.
tz ~92
Paid $0.01 USDC exact on Base: IANA timezone clock. name=America/Denver (default). Returns now, UTC offset, DST. No API keys. payTo 0x3903F05a17676566958B0a3E0c21E0bd49B66ea0.
| Name | Type | Req | Description |
|---|---|---|---|
| name | string | – | IANA timezone name. Optional; default America/Denver. |
No output schema declared.
No examples provided.
who ~93
Paid $0.01 USDC exact on Base: isContract, ETH balance, USDC balance, tx count for an address. payTo 0x3903F05a17676566958B0a3E0c21E0bd49B66ea0.
| Name | Type | Req | Description |
|---|---|---|---|
| address | string | yes | 0x-prefixed 20-byte EVM address on Base (or Solana/base58 for sanctions). |
No output schema declared.
No examples provided.
wiki ~167
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.
| Name | Type | Req | Description |
|---|---|---|---|
| hits | integer | – | 1..8 search results (default 5). |
| lang | string | – | en (default) or simple. |
| q | string | – | Search query (aliases query= search=). Required unless title=. |
| title | string | – | Direct page title or wikipedia.org/wiki/Title URL. Alias page=. |
No output schema declared.
No examples provided.
wx ~137
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.
| Name | Type | Req | Description |
|---|---|---|---|
| lat | number | – | Latitude -90..90. |
| lon | number | – | Longitude -180..180. |
| q | string | – | Place name (e.g. Denver, CO). |
| units | string | – | metric (default) or us. |
No output schema declared.
No examples provided.
How do I install the x402 Checker (AI Nock) MCP server?
x402 Checker (AI Nock) is a hosted endpoint at https://x402-checker.nock-for-mak.workers.dev/mcp, so there is nothing to install locally. Ready-made configuration for Claude, Cursor, VS Code, Codex and 5 more is on this page, copied from each client's own documentation.
remote · x402-checker.nock-for-mak.workers.dev
claude mcp add --transport http nock-for-mak-x402-checker 'https://x402-checker.nock-for-mak.workers.dev/mcp'
What is the x402 Checker (AI Nock) MCP server?
x402 Checker (AI Nock) is an MCP server listed in the public MCP registry as io.github.nock-for-mak/x402-checker. Free check/board/name; paid bid/report 0.05, 1c fx/wx/lookups, news 0.001. This page covers its hosted endpoint (https://x402-checker.nock-for-mak.workers.dev/mcp).
Is the x402 Checker (AI Nock) MCP server safe to use?
x402 Checker (AI Nock) scores 74 out of 100 on VerifyMCP. That is a record of what we were able to check automatically, not an endorsement. The category breakdown on this page shows every signal behind the number, including the ones we could not confirm.
What tools does the x402 Checker (AI Nock) MCP server expose?
x402 Checker (AI Nock) exposes 43 tools: check, check_batch, report, who, md, and 38 more. Their descriptions and schemas cost roughly 5,716 tokens of context every time the server is loaded.
Does the x402 Checker (AI Nock) MCP server require authentication?
No. We connected to x402 Checker (AI Nock) without credentials and it answered, so anything it exposes is reachable by anyone who knows the address.
Is the x402 Checker (AI Nock) MCP server still maintained?
x402 Checker (AI Nock) is still listed as active in the MCP registry. We last reached this channel on 4 November 2026. Those dates come from our own scans of the registry and the channel itself, not from anything the publisher announced.