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Showing the 22,330 endpoints that answered our last unpaid knock, most recently knocked first. The catalogue holds 83,539 listings in all: 21,541 charge, 848 answered without asking, 9,761 did not reach a working endpoint, and 51,389 we have never knocked on. Type something above to search all of them.
Split YAML front-matter from a document — returns the parsed metadata object and the remaining content body. Malformed YAML is rejected as a clean 400.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-23.
Mailvett: Validate up to 10 email addresses per call: syntax, MX and provider, disposable, role and free-provider flags.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-23.
Is a given date a business day in Japan? Returns weekday/holiday status, official holiday name (JA/EN) and next/previous business day. Source: Cabinet Office of Japan.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-23.
Link map: fetches one public HTML page server-side and returns up to 100 normalized, deduplicated http/https links with internal/external classification and counts, the final URL, a timestamp and a tamper-evident receipt. Single GET query parameter (url). One page only; no recursive crawling. Check crawl permission first with GET /api/v1/robots-check.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-23.
Real-time arbitrage spreads between tokenized securities and actual stock prices. Identify premium/discount opportunities.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-23.
Cash dividend history for a US stock — ex-dividend/pay/record dates, per-share amount and payout frequency.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-23.
Google Search API: Give a query, get ranked organic results with title, link, snippet, plus knowledge graph and related searches. $0.003 USDC per call on Base.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-23.
Amazon Search API: Give a product query, get Amazon listings with ASIN, price, and rating. $0.003 USDC per call on Base.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-23.
Market data OHLC candlestick bars for stocks, crypto, forex and options — historical aggregates over any window by ticker.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-23.
Exponential Moving Average (EMA) technical indicator for any ticker — trend analytics for stocks, crypto, forex and options.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-23.
Will this ad copy actually convert on Meta, Google, LinkedIn or TikTok? Ready-to-use ad variants (headline, primary text, CTA, why it works) plus a headline bank, hook bank, audience targeting and platform compliance notes for a given platform, product, audience and goal. For advertising, paid-social and growth agents.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-23.
Is this business visible to AI assistants? Live scan of the actual website: which AI crawlers robots.txt blocks (GPTBot, ClaudeBot, PerplexityBot, Google-Extended and 10 more), llms.txt presence, Schema.org structured data + NAP completeness, sitemap and answer-shape signals — verbatim evidence rows, a deterministic grade, and a prioritized GEO/AEO fix plan. Any domain, any country. AI visibility is ~30x harder than the local pack — check before you spend.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-23.
Agent-tier preview of the AI-visibility check: live pass/fail scan of the actual website — robots.txt AI-crawler blocks (GPTBot, ClaudeBot, PerplexityBot, Google-Extended + 10 more), llms.txt presence, Schema.org structured data, sitemap presence — plus a deterministic grade. No fix plan, no prioritization, no evidence rows (those are in the $0.50 full check). Any domain, any country.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-23.
Invoice pipeline in one call: PDF to structured Markdown (hallucination-guarded OCR), invoice field extraction, arithmetic verification, optional issuer enrichment. Flat $0.05/document (text PDFs to 20 pages, scans to 3).
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-23.
Compares the volume of the most recent completed minute candle with the distribution of minute volumes over the chosen lookback, taken from the history this hub records itself every minute. Median and median absolute deviation are used instead of mean and standard deviation because volume is skewed. Every finding carries its z value, the baseline median, the baseline MAD and the number of samples behind it, so it can be recomputed rather than believed. Pairs without a finding are returned in qui
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-23.
Walks the visible book of every requested exchange for the given size, in both directions, and works out what remains of the raw spread: gross_spread_bps from top of book, then the taker fee of the entry tier on both sides, then the slippage the size causes on the buy book and on the sell book. net_spread_bps is the headline number, the gross value stands next to it because on its own it is misleading. Transfer costs are the part no public exchange interface publishes without a key: withdraw fee
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-23.
Reads the fee history of the last 20 blocks on Ethereum, Base, Arbitrum, Optimism, Polygon or BNB Smart Chain and returns what a transaction costs right now. Priority fees come from the 10th, 50th and 90th percentile of the tips actually paid in those blocks — the percentile used is named, not hidden. On rollups the L1 data fee is quoted separately from the L2 execution fee, because it is often the larger part and an estimate that merges them is simply wrong; the L1 part is computed from the cha
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-23.
Web extraction for AI agents: URL to clean Markdown + metadata, automatic JS rendering, robots.txt respected. No API key. $0.005 fast / $0.01 rendered; cached results half price (this 402 quotes the exact amount).
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-23.
Resolve DNS records over DNS-over-HTTPS: A, AAAA, MX, TXT, NS, CNAME, SOA, CAA, SRV, PTR and more. Returns parsed answers with TTLs and the response status. Built for agents checking mail routing, domain config, or propagation. POST a JSON body like: {"name":"example.com","type":"MX"}
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-23.
Uses the geometric AWG definition, so results are exact for solid round conductors. Mass per metre and resistance follow from the material density and resistivity at 20 degrees Celsius; stranded conductors carry roughly two to five percent more mass and resistance per metre than the same nominal size and are not modelled separately. Supply either awg or cross_section_mm2, not both. Sizes 4/0 through 40 AWG are covered.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-23.
Instant disposable email detection — checks against 5,000+ known temporary email domains (Guerrilla Mail, Mailinator, Temp Mail, 10MinuteMail, and more). Returns boolean result. Maintaining this blocklist yourself requires weekly updates from multiple sources. Accepts USDC payments on Base and Solana
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-23.
Google Trends interest over time for one keyword: a dated 0-100 series for a country or worldwide, past 7 days to 5 years, in one $0.045 GET. Use when you need search-interest trends, seasonality or demand direction for a keyword. Daily points for short windows, weekly for 12 months. A live call takes up to about 30 s. Bad input is free; upstream errors are not charged.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-23.
Downloads one HTTPS image through the hub SSRF guard, then asks the configured OpenAI vision model for strict structured JSON. It reports observed features and readable markings, at most five ranked type candidates, and conductor material, core count or cross-section only where the image supports them; unknown values remain null or unknown. The result is identification assistance, not an electrical safety clearance, approval, voltage-state determination or substitute for inspection and testing.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-23.
Compute the determinant of a square matrix via Gaussian elimination with partial pivoting. A non-square, ragged or empty matrix is a clean 400; a singular matrix simply returns 0.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-23.
Validate email addresses: RFC-style syntax checks, IDN domain normalization, live MX lookups with A/AAAA fallback (DNS-over-HTTPS), disposable-domain detection, role-address detection (info@, support@), free-provider flagging, and typo suggestions for popular providers (gmial.com -> gmail.com). Single address or batches up to 50. POST a JSON body like: {"emails":["ada@example.com","bad@mailinator.com","typo@gmial.com"]}
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-23.
Returns live perpetual-futures funding rates, mark and index price, open interest, and 24h volume for BTC, ETH, SOL, XRP, and ADA from Kraken Futures and Hyperliquid, plus a per-symbol consensus with 8h and annualized funding, who pays whom, and a LONG_CROWDED / SHORT_CROWDED / BALANCED crowding label — use it to price carry or spot a crowded side before taking a leveraged position. Cached 5 minutes.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-23.
Does this x402 seller actually deliver when paid? We test the full flow as a real buyer: quote, 402 requirements validation, a real capped probe purchase, settlement and delivery — not a lint that stops before money moves. The signed verdict states exactly which steps ran and what failed: 402-again loops, wrong payTo, malformed accepts, phantom endpoints. agenteconomy.cloud (mcp-pricing-v1.1)
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-23.
Barker's stablecoin market snapshot: total market cap, yield-bearing cap, asset distribution, chain distribution. Use for 'stablecoin market cap', 'USDT market share', '稳定币市场份额'. share_pct fields are decimals (0.425 = 42.5%).
Unpriced in the listing, which is not the same as free. it demanded payment when we knocked, on 2026-10-23.
Enrichment: attaches real on-chain context to a bare address (contract vs EOA, native balance, transaction count, new-vs-active classification) — checkable facts only, no unverifiable labels.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-23.
Coinbase price premium vs composite spot median (OKX + Kraken + Binance). premium_pct = (coinbase / composite_median − 1) × 100. Positive = US/institutional demand skew; negative = global selling pressure. Covers BTC/ETH/SOL/XRP/DOGE/ADA/AVAX/LINK/DOT/LTC/BCH/ATOM/NEAR (assets listed on Coinbase). Point-in-time only — no historical baseline stored. $0.02 USDC per call via x402.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-23.
Trademark, copyright, patent, and trade-secret guidance: registration process, filing costs, protection duration, international Madrid Protocol filing, and enforcement options for infringement. Intellectual property intelligence for IP and legal agents.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-23.
Real-time precious metals market data from Blocksize Capital.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-23.
Real-time FX market data from Blocksize Capital.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-23.
Order a gift card from the catalog. Browse available cards at GET /search-gift-cards.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-23.
Decision-support dossier for hotel land screening using six disclosed measurements and a deterministic balanced evidence score. It is screening evidence, not a permit, valuation or legal determination.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-23.
Measures local depression depth for exactly two European coordinates with one method and reports the signed difference and winner where meaningful.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-23.
Estate planning guidance and will vs trust comparison: state probate thresholds, probate-avoidance tools, estate-tax limits, power of attorney, beneficiary updates, and digital-asset planning, with a step-by-step checklist and cost estimates by state. For estate and legal agents.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-23.
Analyze public indexed large DEX trades.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-23.
Backtest a declarative long-only spot strategy on public Binance history.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-23.
Employment law guidance and wrongful termination check: covers wage theft, workplace discrimination, harassment, retaliation, non-compete enforceability, and FMLA/ADA rights, with filing deadlines, agency, claim strength, and next steps. For employee and legal agents.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-23.
Detect whether a public page changed since the last hash, with a compact diff.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-23.
Newstex MCP Network: one page of metadata-only story search results.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-23.
Curated reading list on Encyclopedias and dictionaries for tutoring agents, quiz generators, and reading apps — 149 public-domain books (e.g. Encyclopaedia Britannica, 11th Edition, "Banks" to "Bassoon" Volume 3, Part 1, Slice 3, Encyclopaedia Britannica, 11th Edition, "Austria, Lower" to "Bacon" Volume 3, Part 1, Slice 1). Full-text retrieval with drill-down routes for chapters, quotes, and citations. No license, no API key required.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-23.
Check up to 100 email addresses in one paid call, billed per address.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-23.
Newstex MCP Network: one page of metadata-only story search results.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-23.
Everything free by Hablot Knight Browne: the 43 catalogued public-domain books, audiobooks and texts credited to Hablot Knight Browne across Project Gutenberg, LibriVox and Internet Archive, most popular first, each with direct download links. Add words to narrow by title. Re-verified daily. $0.01 per page of 20.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-23.
WhiteMagic hosted recall — agent memory for cross-session continuity: read-only hybrid search (BM25 + vector + associative) over a curated public corpus. Call when an agent needs durable context from prior sessions or the public knowledge store. Keyless discovery (initialize/tools/list) is free; free evaluation keys and a daily no-key trial are available. One paid tool call per payment.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-23.
Geotagged English Wikipedia articles near a point. Perfect for: bounded community reference research with page, revision, distance, and license provenance. Geosearch is topic-agnostic and may return places, institutions, events, or people. Results are not official, property, resident, screening, or current-condition evidence. Charge-free when no article matches or the source is unavailable.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-23.
Toolstem SEC EDGAR Signal Intelligence MCP — filings, insider transactions, 8-K severity scoring. Per-tool tiered pricing ($0.005–$0.50).
The price is the seller’s own listing. it answered us without asking for payment, once, on the day we knocked, on 2026-10-23.
Return the structured offer of one product page: identifiers, price, availability, shipping, variants, ratings, images and seller, each with its source.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-23.
The description and the price are the SELLER’S, copied from their listing and not checked by us. The badge is OURS and is one unpaid handshake: “answered unpaid” means it answered us once without asking for payment, which is not a standing offer, and an unpriced listing is unpriced rather than free.
Knocking goes to the knock page, which reads the terms live before anything is signed. A listing can be out of date in both directions, which is the reason to knock rather than to read a row.