Discover / saylorinnovations.com

Saylor Innovations Library Docs

■ Challenge detected

Current library docs for an npm, PyPI, crates, Go or GitHub package - README sections, version, license and install

Listed price
$0.01
Challenge detected
7 of the last 10 checks
Median response
275 ms
Last checked
17 Oct, 07:50 UTC
In our index since
26 Sept 2026

Endpoint

curl -i https://saylorinnovations.com/api/docs/npm/zod
# 402 Payment Required: pay with an x402 client (USDC on Arbitrum),
# then send the same request again with the payment attached.
1,040 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://saylorinnovations.com/api

  • GET/finance/cagr$0.01CAGR calculator from start value, end value and years - growth multiple and annual rate
  • GET/accessibility/contrast$0.01WCAG contrast ratio calculator for two sRGB colors - luminance, ratio and AA/AAA flags
  • GET/chainlink/feeds$0.01Search the Chainlink data feed directory by name or asset on Ethereum, Base, Arbitrum, Optimism, Polygon, BSC or Avalanche - proxy address, decimals, heartbeat and deviation
  • GET/kb/web-performance-vitals$0.01Web performance and Core Web Vitals - LCP, INP and CLS diagnosis with field and lab evidence
  • GET/evm/arbitrum/transfers/:address$0.01Arbitrum ERC-20 token transfer history - decoded Transfer events, filterable to one wallet
  • GET/sanctions/un$0.01Screen a name against the UN Security Council consolidated sanctions list - individuals and entities with aliases, reference, listing date and notes
  • GET/video/pixels$0.01Video pixel count calculator - total pixels, megapixels and aspect ratio
  • GET/stocks/quote/:symbol$0.01Stock quote for any ticker (US stocks, ETFs, indices) - price, change, day and 52-week range and volume
  • GET/math/ab-test$0.01A/B test significance from visitors and conversions - lift, z-score, p-value, confidence interval, winner and the sample size needed per variant
  • GET/kb/port-firewall-reverse-proxy$0.01Port, firewall and reverse-proxy guide - verify the request path from client to local listener
  • GET/education/final$0.01Final exam score-needed calculator from current score, target and exam weight
  • GET/transit/berlin/arrivals$0.01Berlin VBB real-time departures for U-Bahn, S-Bahn, tram and bus - line, direction, delay and platform
  • GET/agriculture/irrigation$0.01Irrigation water volume estimate from area, target depth and system efficiency - liters and cubic meters
  • GET/medical/trials$0.01Clinical trial search on ClinicalTrials.gov by condition, drug, sponsor, location, status and phase
  • GET/stocks/history/AAPL$0.01Stock price history (OHLCV) for any ticker, 5 days to max, daily to monthly
  • GET/scripture/gita/2/47$0.01Bhagavad Gita verse - Sanskrit, transliteration, English translations and Hindi
  • GET/construction/paint$0.01Paint quantity estimator from area, coverage, coats and waste - liters and gallons
  • GET/convert/speed$0.01Speed converter - convert between mph, km/h, m/s, knots and ft/s with all equivalents
  • GET/web/agent-readiness$0.01Check how ready a site is for AI agents - llms.txt, robots.txt AI crawler rules, sitemap, agent card, OpenAPI, MCP and x402 discovery files with a score
  • GET/chem/compound/caffeine$0.01Chemical compound lookup in PubChem by name, CAS, CID, SMILES or InChIKey - formula, weight, properties and GHS hazards
  • GET/kb/cache-integrity-invalidationNo price listedCache Integrity and Safe Invalidation — Self-Hosting & Infra
  • GET/research/crossref$0.01Scholarly article search from Crossref - DOI, title, authors, year, journal, publisher and citation count for any paper title or topic query
  • GET/web/contacts$0.01Public contact details a website publishes - emails flagged role-based or same-domain, phone numbers and social profile links from the home and contact page
  • GET/papers/search$0.01Academic paper search across 250M+ works (OpenAlex) - authors, venue, DOI, citations and open-access status
  • GET/x402check/verify$0.01x402 endpoint validator - checks a URL returns a well-formed 402 challenge with valid accepts per network

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

Showing 25 of 1,040 listed endpoints. Next endpoints First endpoints

Agents can find it through the Superstables MCP server and JSON API: GET /api/v1/services/saylorinnovations.com

Recent checks

29 Sept 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.17 Oct 2026
All 10 checks
When (UTC)ResultHTTPResponse
17 Oct, 07:50 UTCChallenge detected402568ms
15 Oct, 23:42 UTCChallenge detected402660ms
14 Oct, 19:26 UTCChallenge detected402529ms
12 Oct, 22:31 UTCChallenge detected402173ms
11 Oct, 00:15 UTCNo challenge detected400276ms
9 Oct, 18:38 UTCChallenge detected402240ms
8 Oct, 15:35 UTCChallenge detected402275ms
7 Oct, 15:42 UTCChallenge detected402212ms
6 Oct, 15:31 UTCNo challenge detected400282ms
29 Sept, 05:02 UTCNo challenge detected400192ms

Questions

Did our last probe detect a payment challenge?

At our last probe on 17 Oct, 07:50 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 Saylor Innovations Library Docs?

Its listed price is $0.01.

What payment terms does Saylor Innovations Library Docs advertise?

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

Where is Saylor Innovations Library Docs listed?

In x402 Bazaar and x402-list.com. Superstables first indexed it on 26 Sept 2026.

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