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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.
Find local businesses by city and category. Returns name, phone, address and verified website status (live/broken/none, https, last-checked date). 0.05 USDC per query.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-23.
This-session snapshot only — no watch, no cursor. Use when you will not come back. Required by type: url/rss/x402 need url; price needs coin plus above, below, or move_pct_24h; edgar needs ticker or cik. 8-K items are decoded, Form 4 trades parsed, and x402 probes validate the unpaid 402 challenge without sending payment. If the job spans runs, create_watch instead and persist watch_id + key.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-23.
ZenSched `account_activity` — Audit log of every mutating call your org's keys have made. Filters: since (ISO date), tool_filter (tool name), limit/offset. Pay-per-call $0.01 USDC; the paying wallet owns the org (auto-provisioned on first call). Catalog: https://mcp.zensched.com/x402/tools
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-23.
Where agents are spending and almost nobody is selling — demand against classified supply.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-23.
Daily state of the x402 agent economy: observed USDC inflow, seller ranking, category demand, growth, and coverage. Reports its real observation window; concentration adjustment applied only when scan coverage supports it. A FREE register-wide change digest covering the same domain is market_digest on the x402-observatory gateway; buy this for the derived figures, not for what merely changed.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-23.
Blue Zone intelligence / longevity hotspot guide (Okinawa, Sardinia, Ikaria, Nicoya, Loma Linda) for longevity and wellness agents. Deep-dives the diet, lifestyle, genetics, and social fabric of the world's longest-lived populations, with what you can actually apply anywhere. Health intelligence, not medical advice.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-23.
Crypto spot prices — Coinbase spot prices for up to ten assets.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-23.
Medicaid Waiver Register: one page of recorded obligation history, up to 500 versions. Each page is a separate purchase; historical coverage may be incomplete. Licence: https://getregisters.com/agent-licence.html
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-23.
All-in franchise investment breakdown for franchise-buyer and investor agents. Returns initial costs, ongoing fees, a 5-year projection, and a break-even estimate.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-23.
Air quality — US & European AQI plus pollutant concentrations by coordinate.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-23.
Observed change feed for listed x402 sellers: declared payTo changes with before/after values, other declared-terms changes (price, facilitator, fee payer), registry removals and returns, rating actions, and grade downgrades. Every response reports measured per-category coverage for the requested window.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-23.
Current US air quality by ZIP: worst AQI now, the pollutant driving it, and a GOOD to HAZARDOUS verdict.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-23.
Parse an expression and return the free variables it references, without evaluating it — so an agent can discover which inputs a formula needs before supplying values. A syntax error is a clean 400.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-23.
Dietary restriction guide / food allergy guide / diet guide (gluten-free/celiac, keto, vegan, low-FODMAP, renal, diabetic). Returns safe foods, hidden sources to avoid, safe swaps, and restaurant ordering tips for any dietary restriction, allergy, or medical diet. Worldwide.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-23.
Reformat a MAC address into the requested notation (colon, hyphen, Cisco dot or bare) and case (lower default or upper).
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-23.
Generate a random EUI-48 MAC address. By default it is locally-administered and unicast (safe for testing); set `local:false` for a universal-bit address or `multicast:true` for a group address.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-23.
Complete, ready-to-send Letter of Inquiry: funder and project in, a one-page LOI out — researched against the funder's actual stated priorities and mirroring their language, with every organisation-specific fact left as a [BRACKETED] placeholder (never invented), alignment points listed, and an honest funder-fit read. The document that gets you invited to submit a full proposal. Works for foundations, corporate and government funders worldwide.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-23.
Search for upcoming concerts. Supports city, date range, genre, and artist filtering.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-23.
Website HTTP and metadata inspection report
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-23.
Fetch the first page of public comments for a post.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-23.
Answers whether a drug carries a boxed warning, the strongest warning class the FDA applies, and returns the warning text with the label version it came from. The check runs across multiple labels for the same substance rather than the first hit, because labels are maintained independently by each manufacturer and the same generic can carry a boxed warning at one and not at another; taking the first result and answering no is how this question gets answered wrongly.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-23.
US macro intelligence — Fed rate, CPI/Core PCE YoY, yield curve, M2 money supply, GDP, VIX, crypto Fear & Greed, AI macro regime narrative
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-23.
Herb-drug interaction check for health and wellness agents. Returns contraindications and safety flags for combining any herb or supplement with medications.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-23.
Compare Separate provider confidence bands from unknown confidence values. against a bounded caller-supplied previous snapshot and return exact change witnesses. Baseline is caller supplied and is never authenticated as historical server output. Pure bounded timing/source-quote validation runs before payment. Exactly one current motor call, zero baseline provider calls. Full current provider disclosure retained; baseline is not submitted to the provider.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-23.
Compare Index subtitle display gaps for caption coverage review. against a bounded caller-supplied previous snapshot and return exact change witnesses. Baseline is caller supplied and is never authenticated as historical server output. Pure bounded timing/source-quote validation runs before payment. Exactly one current motor call, zero baseline provider calls. Full current provider disclosure retained; baseline is not submitted to the provider.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-23.
Compare Timestamped source search for API design discussion passages; literal vocabulary only. against a bounded caller-supplied previous snapshot and return exact change witnesses. Baseline is caller supplied and is never authenticated as historical server output. Pure bounded timing/source-quote validation runs before payment. Exactly one current motor call, zero baseline provider calls. Full current provider disclosure retained; baseline is not submitted to the provider.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-23.
One guide as source markdown
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-23.
Independent scoreboard of ERC-8004 agents on Base: a page of up to 100 agents with score 0-100, verdict LEGIT, SUS or BOUNCED, rank, clean paid jobs, clients, clean ETH earned and flag count, scored from public onchain escrow jobs and reviews with self-hires and review farms washed out. Filter by board or verdict; next_cursor pages on. Check before you hire.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-23.
Generate a captioned meme image. Pay per request in USDC on Base mainnet.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-23.
Email intelligence for a company domain: mail provider (Google Workspace, Microsoft 365, Proofpoint...), catch-all status, SaaS tools revealed by SPF (HubSpot, Salesforce, Zendesk, SendGrid...), DMARC policy, public email addresses found on the company's own website with source URLs, and the likely address pattern. Useful before cold outreach or for tech-stack prospecting.
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.
MENA regional macro + geopolitical stress pulse (no params)
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-23.
Semantic search over an agent's own persistent memories (wallet-scoped). Free with a valid x-api-key.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-23.
Buy Hoodi ETH with Base or Solana USDC at $0.025 per testnet ETH
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-23.
AMM Invariant Monitor analyses only the evidence supplied by the caller. It does not claim to query a chain, identify a legal status or replace an independent audit. Missing signals lower confidence and are listed explicitly; every classification includes the exact thresholds used.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-23.
Render GitHub-Flavored Markdown to HTML. Output is sanitized by default (scripts, event handlers and javascript: URLs removed); set sanitize=false to keep raw HTML.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-23.
Snapshot of every series, all countries
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-23.
Crypto regime signal: Stage 1 score (0-4) + WaveTrend 10/21/4 band dots on 66 Kraken 4h pairs
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-23.
Onchain loyalty platform on Base Network. Businesses launch branded rewards in minutes, customers earn real value with every purchase, and AI agents automate the rest via REST and MCP. Payment alone works: the paying wallet is the caller. An API key is optional. The call is scoped to the wallet behind that key. 16 skill guides at loyalspark.online/.well-known/skills/index.md.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-23.
Onchain loyalty platform on Base Network. Businesses launch branded rewards in minutes, customers earn real value with every purchase, and AI agents automate the rest via REST and MCP. Payment alone gives access; do not send an API key. 16 skill guides at loyalspark.online/.well-known/skills/index.md.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-23.
News Gurus Intel API — full quality-compounder rankings (high-margin / low-debt / high-cash / growing-revenue US equities + revenue-generating crypto protocols, percentile-scored) PLUS growth-stock LEAPS candidates, in one call. A whole ranked universe per request. Educational data, not financial advice.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-23.
News Gurus Intel API — multi-sport prop-bet edge scan: NG-derived edge_pct, confidence, reasoning and recommended_action (STRONG_PLAY/PLAY/MONITOR/SKIP) across MLB, NBA, NFL props from the live Kalshi executor ledger and the player-prop intelligence agent. Model-owned fields only. Optional ?sport= filter (mlb/nba/nfl). Educational data, not financial advice.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-23.
News Gurus Intel API — dormant/Satoshi-era BTC wallet movement feed: on-chain moves with BTC amount, years dormant and transaction timestamps (public on-chain — no upstream-license restriction). Optional ?limit= (default 25, cap 50). Educational data, not financial advice.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-23.
Get "Token God Mode" (TGM) flow intelligence data
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-23.
Get "Token God Mode" (TGM) DEX trades data
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-23.
Get Smart Money PnL Leaderboard
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-23.
Latin American official government reference data as cited JSON, every covered country: income and corporate tax, VAT/GST, CPI inflation, central-bank policy rate, minimum wage, public holidays, business days, official exchange rate, statutory interest, social contributions. Each value has source URL, effective date, last_confirmed, stale. GET /v1/{country}/{series}, e.g. /v1/br/policy-rate.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-23.
The FOMO users holding the most of a token: each holder's FOMO handle and id, token amount, position value, cost basis, realized and unrealized P&L, hold time, developer flag and their posted thesis. Covers holders who trade on FOMO, not every on-chain wallet. Use for social and holder analysis of a token.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-23.
Snapshot of every series, all countries
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-23.
Multi-year financial history for one hospital by CCN: beds, discharges, revenues, net income per fiscal year, up to 15 years. Source: CMS cost reports.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-23.
Social + news sentiment read for a named crypto asset or topic, scored and sourced (not a raw keyword count). Settlement proof: ProofOfSettledOutcome (kind 30120, data/proof_settled_outcomes.jsonl). Same sentiment methodology as research.topic-sentiment-analyzer, scoped to... | BlindOracle by Craig M. Brown (craigmbrown.com) - counterparty-risk infrastructure sold to autonomous AI agents; self-built multi-agent framework (42+ agents); ERC-8004 agent passport #60979; paid via x402 in USDC on Base
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.