Discover / api.sitecheck-api.workers.dev

SiteCheck

■ Challenge detected

Currency exchange rates from the European Central Bank (about 30 currencies, back to 1999): latest or a given date, amount conversion, or a daily time series between two dates. Source: ECB reference rates via Frankfurter.

Listed price
$0.001
Challenge detected
5 of the last 9 checks
Median response
278 ms
Last checked
16 Oct, 23:40 UTC
In our index since
1 Oct 2026

Endpoint

curl -i https://api.sitecheck-api.workers.dev/api/fx
# 402 Payment Required: pay with an x402 client (USDC on Base),
# then send the same request again with the payment attached.
221 listed endpoints · on x402 Bazaar

Checks and payment terms on this page refer to the endpoint above. Other listed endpoints have not been checked individually.

Base URLhttps://api.sitecheck-api.workers.dev/api

  • GET/tablesNo price listedEvery HTML table of a web page as JSON: caption, headers and rows, up to 10 tables with 200 rows each. Tables that a script draws are not included. robots.txt is respected; a page it disallows answers 403, not charged.
  • GET/token/metadataNo price listedToken facts read on chain: for an ERC-20 on 22 EVM chains the name, symbol, decimals, total supply and EIP-1967 proxy implementation; for a Solana SPL mint the decimals, supply, mint and freeze authority. Adds price and liquidity from the token's deepest DexScreener pool on that chain, its logo and websites, and whether the Uniswap default list carries it (EVM). Information only, not financial advice.
  • GET/pm/tradesNo price listedFetches latest trade executions for a Polymarket condition ID or token. Returns timestamp, side (BUY/SELL), outcome label, execution price, size, value in USDC, and taker proxy wallet address. Limit up to 100 trades. Information only, not financial advice.
  • GET/congressNo price listedUS federal bills from Congress.gov (Library of Congress). Keyword search (q) runs over the 250 most recently updated bills of a Congress, since the API has no full-text search; each match gets its sponsor, status and latest action. A bill number (bill=hr1234-119) returns its cosponsor count, committees and up to 30 actions. Public domain.
  • GET/llms-txtNo price listedWhether a site publishes /llms.txt and /llms-full.txt: the parsed llms.txt (title, summary, sections with their links) and the size of llms-full.txt. Reads the site itself, through the same URL guard and size cap as the page tools.
  • GET/hn/searchNo price listedFull-text search of Hacker News stories or comments through the Algolia HN API: title, URL, author, points, comment count, time and HN link; comments include their text (max 500 characters). Filters: date range (from, to as YYYY-MM-DD), minimum points, sort by relevance or date. Covers the public HN index only; limit max 25.
  • POST/text/outlineNo price listedBuilds an outline (title, sections with headings and bullet points, optional word targets) for a topic, or from a text you give. Depth 1-3, at most 12 sections. Model output: review it before use; word targets are estimates. Input text max 10,000 characters.
  • POST/resume/parseNo price listedStructured data from a CV or resume: name, contact details, location, links, summary, skills, languages, certifications, work experience and education, with null or empty lists where the text has nothing. Plain text, or a PDF with a text layer by URL or base64. Dates are kept as written. Not live-checked: Workers AI is checked by the owner after the merge.
  • GET/npiNo price listedUS healthcare providers from the NPPES NPI Registry: look up one by its 10-digit NPI (check digit verified) or search by name with an optional state. Each provider gives type, name, credential, status, primary taxonomy and practice address. Information only, not medical advice.
  • GET/company/registryNo price listedCompanies from the official registers of Norway, Finland, the Czech Republic and Poland. Search by name (Norway, Finland, Czech Republic) or look up one company by its number: Norway 9 digits, Finland Y-tunnus, Czech IČO, Poland KRS (Poland by number only). Answers give name, id, status, legal form, address, incorporation date and industry; Norway lookups by number also list managers. France is not included (see the PR).
  • GET/sentimentNo price listedSentiment of one text, or up to 20 (texts, a JSON array), each up to 2,000 characters: POSITIVE or NEGATIVE with the model's confidence, from DistilBERT SST-2. Best for short English text. It measures the wording, not whether the statement is true.
  • POST/hashNo price listedHashes of a text or base64 input (up to 1 MB): MD5, SHA-1, SHA-256, SHA-384, SHA-512 and CRC-32, and HMAC-SHA-256 or HMAC-SHA-512 when a key is given. Hex and base64 output. MD5 and CRC-32 are implemented here and checked against RFC 1321 and the standard CRC test vector. Body { input, encoding, algorithms, key }. Pure code and WebCrypto, no outside request.
  • GET/sec/financialsNo price listedKey figures per fiscal year or quarter from a company's SEC XBRL filings, the numbers it tagged itself: revenue, net income, operating income, assets, liabilities, equity, cash, operating cash flow, diluted EPS and shares outstanding. Each value carries the form and filing date it came from. Ticker or CIK. Source: SEC XBRL API, public domain.
  • GET/crypto/candlesNo price listedOHLCV candles for a Coinbase trading pair (BTC-USD) at 1m, 5m, 15m, 1h, 6h or 1d granularity, up to 300, newest first, from Coinbase Exchange public market data. Prices are that venue's trades only. Information only, not financial advice.
  • GET/pm/holdersNo price listedThe largest position holders of each outcome of one Polymarket market (condition id from /api/pm/event): wallet, public name if the holder shows one, shares held, and each holder's share of the listed top holders' total. Polymarket's Data API lists the top holders only, so totals cover those wallets, not the whole outcome supply. Up to 50 per outcome. Information only, not financial advice.
  • GET/fda/adverse-eventsNo price listedThe most reported adverse reactions to a drug in FDA's FAERS database: counts, total reports and the share that were serious. Reports are voluntary and show association, not proof of cause. Source: openFDA. Information only, not medical advice.
  • GET/stackoverflowNo price listedStack Overflow questions matching words, optionally by tags and accepted status: title, score, answer count, accepted flag, tags and link. With answers=1 the accepted answer's first 600 characters are included. Content is CC BY-SA 4.0 (attribution per item). Stack Exchange API 2.3.
  • GET/perps/accountNo price listedA Hyperliquid account by address: account value, margin used and withdrawable amount in USD, and each open position with side, size, entry and mark price, unrealised PnL, leverage and liquidation price. Read-only. Information only, not financial advice.
  • GET/youtube/transcriptNo price listedA YouTube video's captions as plain text and timestamped segments, with the video's title, channel, duration, views, publish date, chapters and the list of caption languages. Accepts watch, youtu.be, shorts, embed and live links or the 11-character id; pick a language with lang (default English, else the first track). Auto-generated captions contain recognition errors. A video without captions is a 404 and not charged.
  • POST/evm/simulateNo price listedSimulates an EVM transaction execution without broadcasting: { chain, from, to, data, value }. Returns eth_call output, gas estimate, success/revert status with decoded revert reason (Error(string), Panic(uint256)), and token balance if to is an ERC-20. State overrides not supported by public RPCs. Information only, not financial advice.
  • GET/langNo price listedThe language of a text with franc-min: ISO 639-3 and ISO 639-1 codes, the English name, confidence from 0 to 1, the script (Latin, Cyrillic, Arabic...) and the three next most likely languages. Send texts= (a JSON array of up to 20 strings) for a batch. Under 20 characters the answer is und with a note. 61 languages.
  • GET/sec/searchNo price listedFull-text search of SEC EDGAR filings: company, CIK, form, filing date, file name, a link to the matched document, its file type (e.g. EX-99.1) and the 8-K items. Results are in EDGAR relevance order; a total of 10,000 means at least that many. Filter by form types (e.g. 8-K,10-K) and filing dates. Results are capped at 20. US government data.
  • GET/solana/txNo price listedA Solana transaction by signature: status, time, fee in SOL and USD, signers, SOL balance changes per account, token balance changes (mint, owner, change) and the programs it invoked. Read-only; nothing is sent. A very new signature may be missing (404, not charged).
  • GET/finance/loanNo price listedLoan and investment calculator in exact cents, no outside source. mode=annuity: monthly payment, total interest and the full amortisation schedule (up to 600 months). mode=compound: future value of an initial sum plus monthly contributions. mode=npv or irr: discount or internal rate of return of a list of cashflows (up to 200, the first at time 0). Rates are percentages from 0 to 100 a year (per period for npv and irr); terms up to 50 years.
  • GET/uptimeNo price listedChecks up to five public URLs now from this Worker: up or down, HTTP status, the final URL after up to five redirects, response time in milliseconds, whether TLS was used, content type and length, and the Cloudflare data centre (colo) the check ran from. A down site is a valid 200 answer with up false and the error, not a failure. The check is one GET per hop, so it measures the first response, not the full page.

A dash means the listing gives no price or method. Copy buttons copy the full URL.

Showing 25 of 221 listed endpoints. Next endpoints First endpoints

Agents can find it through the Superstables MCP server and JSON API: GET /api/v1/services/api.sitecheck-api.workers.dev

Recent checks

2 Oct 2026One bar per check, showing up to 20 recent checks. Coloured bars show relative response time, with a minimum visible height; full-height grey bars mean no challenge was detected. “Challenge detected” means HTTP 402 or another detected payment-challenge signal.16 Oct 2026
All 9 checks
When (UTC)ResultHTTPResponse
16 Oct, 23:40 UTCChallenge detected402278ms
15 Oct, 19:10 UTCChallenge detected4021975ms
14 Oct, 14:31 UTCChallenge detected4021027ms
12 Oct, 10:53 UTCChallenge detected40258ms
10 Oct, 15:44 UTCNo challenge detected404830ms
9 Oct, 09:34 UTCNo challenge detected40492ms
8 Oct, 03:32 UTCNo challenge detected40481ms
6 Oct, 21:30 UTCNo challenge detected404702ms
2 Oct, 05:04 UTCChallenge detected402232ms

Questions

Did our last probe detect a payment challenge?

At our last probe on 16 Oct, 23:40 UTC, it returned HTTP 402 or another detected payment-challenge signal. This check did not test payment, delivery or compatibility with the Superstables client.

What price is recorded for SiteCheck?

Its listed price is $0.001.

What payment terms does SiteCheck advertise?

The listing advertises x402, Base, EVM chain 5042, Solana and USDC. It names cdp as its facilitator. Check the seller's current payment challenge and authentication requirements before paying.

Where is SiteCheck listed?

In x402 Bazaar. Superstables first indexed it on 1 Oct 2026.

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