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Showing the 18,042 endpoints that answered our last unpaid knock, most recently knocked first. The catalogue holds 75,516 listings in all: 17,499 charge, 600 answered without asking, 8,666 did not reach a working endpoint, and 48,751 we have never knocked on. Type something above to search all of them.
Fetch any URL and, without paying, decode its x402 402 Payment Required challenge: price (atomic and formatted for known stablecoins), asset, network, payTo, resource, description, timeout and any input schema. Flags MPP and Bazaar discovery extensions. Returns free:true when no payment is needed. SSRF-hardened: public hosts only; private, loopback, link-local and cloud-metadata addresses are rejected.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-20.
Reads the public perpetual data of Binance USDⓈ-M Futures, Bybit linear and OKX swaps for one BASE/QUOTE pair. Settlement intervals differ per exchange and per contract, so annualized_pct is only computed after normalising to the interval that exchange actually uses, and the formula is part of the answer. current_rate and predicted_rate are strictly separate: where an exchange publishes no forecast, predicted_rate stays null and the reason is named instead of reusing the current rate. next_settl
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-20.
Anthropic pre-IPO fundamentals as JSON: FY2025 revenue and May 2026 run-rate revenue, operating expenses, operating and net loss, compute and infrastructure spend, compute obligations, cash and short-term investments, top-customer revenue share, compute cost per revenue dollar. Each number has its own source URL, verification grade and value type (approx, lower bound, exact, derived).
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-20.
Paid book chapter (x402): Automate the Boring Stuff with Python: What Is Programming. Unit of a larger practical-skills library; free catalog at /library/discovery.json. Book slug: automatetheboringstuffwithpythonnew. Response format: Markdown (.md) for agent parsing. USDC on Base via Coinbase CDP facilitator. Free teasers and discovery.json require no payment.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-20.
Anthropic IPO data as JSON: filing status (confidential draft S-1), expected timing and listing window, target valuation range, expected proceeds, lead underwriters, last private round (Series H) size and valuation, run-rate revenue, valuation multiples, dated timeline. Each item has its own source URL and verification grade.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-20.
OpenAI vs Anthropic side by side as JSON: full-year revenue, latest revenue run-rate, last private round and post-money valuation, IPO status and valuation target, compute obligations, cash, and valuation-to-run-rate multiples. Every value keeps its source URL, verification grade and value type; gaps are listed.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-20.
Wallet approval audit (green/orange/red, grade, one-line summary): every open ERC-20 allowance of an EVM wallet with who the spender is (flagged, plain wallet, unverified, unlimited) and which ones to revoke. Bulk: 100 checks for $0.80 via /v1/credits.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-20.
ZenSched `api_key_list` — List active API keys (redacted prefixes only). 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 2026-10-20.
Base gas price — Live Base mainnet gas price from JSON-RPC.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-20.
DNS lookup — Resolve DNS records via DNS-over-HTTPS.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-20.
Agent Roster: node-operated on-chain service Executed deterministically by the AmanChain node against live consensus state (real blocks, pools, balances) — paid per call via x402, settled in USDC on Base. Input: JSON body {"serviceId":"aman-agent-roster","request":"<input>"}. No account, no API key.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-20.
Address Validator: AmanChain address checksum validation Executed deterministically by the AmanChain node against live consensus state (real blocks, pools, balances) — paid per call via x402, settled in USDC on Base. Input: JSON body {"serviceId":"aman-address-validator","request":"<input>"}. No account, no API key.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-20.
Wallet approval audit (green/orange/red, grade, one-line summary): every open ERC-20 allowance of an EVM wallet with who the spender is (flagged, plain wallet, unverified, unlimited) and which ones to revoke
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-20.
Returns the sections of an official drug label sorted by clinical significance rather than document order, with the text passed through word for word. Nothing is summarised and nothing is shortened: a summary is by definition an omission, and an omitted contraindication is the kind of omission that matters. A caller who needs a shorter version can produce one from the complete text supplied here, which is the right order of operations.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-20.
Resolves a gene symbol or identifier and returns the corresponding identifiers across NCBI and Ensembl: the gene with its Entrez and Ensembl identifiers, the genomic location with assembly, the biotype, the description, and the transcripts with their protein products.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-20.
Base Sepolia x402 test-shop checkout with Bazaar discovery and a durable operational receipt.
Unpriced in the listing, which is not the same as free. it demanded payment when we knocked, on 2026-10-20.
Spot crypto prices (DefiLlama). Pay $0.01 USDC on Base via x402.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-20.
For pages blocking native Minifetch that obeys robots.txt: fetch thru external rotating proxy & extract same share-preview fields as /extract/url-preview (title, description, Open Graph, Twitter Card, favicons). No JavaScript rendering; use /proxy/render for that. Optional ?country= (2-letter code) to fetch from a specific country. Not cached. Does not obey robots.txt. Supports GET & POST
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-20.
A random crypto history fact (Bitcoin genesis, Pizza Day, The Merge, EIP-1559, x402 and HTTP 402, USDC, Base...), picked by the latest Base block hash. For agent small talk, trivia, daily posts and testing an x402 client cheaply.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-20.
Supplement interaction checker for nutrition and health agents. Returns absorption conflicts and an optimal daily timing schedule for a supplement and medication list.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-20.
Batch x402 endpoint reliability: factual delivery measurements (uptime, valid-402 rate, latency, last status) for an agent's whole tool list of x402 endpoints in one paid call. Endpoints with no stored history are probed live, so every billed URL returns real facts. Sweep every endpoint you depend on before relying on them. Billed per endpoint, with volume discounts at 10+/50+/100+ URLs. Facts only — not an endorsement or rating.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-20.
Change watch for is atlassian com down: runs the check, compares it with the result from your previous call for the same query (kept 90 days) and returns the current answer, changed true/false, the fields that changed with before/after values, and when it was last seen. Schedule it to be alerted when this changes. $0.02 per check.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-20.
Printwren: Real-Chrome HTML and URL to PDF for invoices, reports and receipts.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-20.
Printwren: Real-Chrome HTML and URL to PDF for invoices, reports and receipts.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-20.
Search onchain DEX pools and token, by contract address, name, or token symbol.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-20.
Query onchain DEX token price & market data based on the provided token contract addresses on a network.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-20.
Search for DEX tokens by keyword (name, symbol, or contract address).
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-20.
Amazon product detail API (US) by ASIN - Amazon product data for one ASIN: title, product URL, image, price range, discount, currency, star rating, review count, category path, availability and description. Amazon prices and product-detail lookup. Unknown ASIN returns found=false.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-20.
Get the latest market quotes for one or more cryptocurrencies.
Unpriced in the listing, which is not the same as free. it demanded payment when we knocked, on 2026-10-20.
Amazon offers & sellers API (US) by ASIN: the buy-box winner plus third-party sellers, each with seller name, price, regular price, discount, condition (new/used), ships-from and seller rating. Amazon offers and sellers for buy-box tracking and price comparison. No offers returns empty results.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-20.
Quick pre-flight quality score: composite (0-100) + grade (A-F) + three framework sub-scores (PEEM, RAGAS, G-Eval) + verdict. Run upstream of any other paid call to filter weak prompts before inference. The cheapest gate on the AI input quality problem.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-20.
Use when you need where one NFL team stands relative to the league entering a week. Each of the 44 attributes (passing, rushing, third down, red zone, penalties, touchdowns per drive) carries its value and two percentiles: pct_week against the 32 teams that week, pct_pooled against all 4,320 team-weeks 2016-2025. 1.0 is best for offense and defense; two style measures (time tied, pass share) stay raw. Answers whether a team's pass defense is near the top or bottom of the league. One JSON row.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-20.
Accepts three forms of recipient. A bech32 lnurl is decoded to its callback URL, a Lightning address is resolved through the well-known lnurlp path, and a Nostr public key is resolved by reading its kind 0 profile from relays and taking the lud16 or lud06 field it publishes.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-20.
US phone carrier lookup: carrier of record, line type (mobile / landline / VoIP / pager), whether the number can be in service at all, rate center and risk hints for any US or US-territory number. NANPA public numbering data refreshed weekly; block-level, so ported numbers keep their original carrier.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-20.
Least common multiple of two or more positive integers (arbitrary precision).
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-20.
CGM glucose pattern interpretation for nutrition and health agents. Returns dietary interventions and meal-composition guidance to flatten glucose curves.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-20.
Multiplies each mutually exclusive supplied scenario probability by its supplied damage fraction and asset replacement value, then sums expected loss. It does not obtain hazard maps, model hydrology, validate damage curves, price insurance or predict a particular event.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-20.
UK council tax bands A–H by postcode.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-20.
UK street-level crime statistics by postcode (Police UK).
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-20.
Answer a question from any web page with verbatim quotes: fetches the URL, reads it and returns found, answer, supporting quotes and optional structured fields (q="fields: a, b, c"). web extraction, page Q&A, structured extraction, grounded answer
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-20.
UK council-tax banding challenge check — neighbor-band cluster analysis against the free official VOA/SAA lookups, statutory route selection (formal proposal vs informal review, England/Wales/Scotland variants incl. the post-2023 Local Taxation Chamber), verified timelines (4/12-month decisions, 3/4-month appeals), evidence rules (the VOA rejects house-price-index data — verified), and the mandatory band-can-go-UP risk gate. Refunds backdate. No LLM.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-20.
Basic company lookup. Give a company name and/or domain. Returns summary plus firmographics: industry, HQ city/country, founded year, employee count and size range, stock ticker, LinkedIn and X links. Each field cites its source (Wikidata, Wikipedia, company site, SEC EDGAR) with checked_at; unknown fields are null, never guessed. $0.10 USDC.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-20.
Omni Terminal delivers fresh, deduplicated market-moving news and catalyst context across equities, crypto, macro, and forex for AI trading agents.
Unpriced in the listing, which is not the same as free. it demanded payment when we knocked, on 2026-10-20.
Country and region endowment in energy-transition and strategic minerals (Li, Co, Ni, REE, Cu, graphite, PGE, uranium) for mining and resource-investment agents, with supply-chain geopolitics on each.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-20.
USGS MRDS records plus exploration-news synthesis for any named mineral deposit or mine worldwide, for exploration and due-diligence agents. The fast read on a specific asset, its grade, status, and recent activity.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-20.
JPYC transfer metrics computed hourly from finalized Polygon blocks: event count, unique senders and receivers, volume, median and top receivers. Covers approximately 24 hours ending at the newest finalized hourly bucket; exact block and time range are in the response. Use for current JPYC usage metrics; not for wallet balances, price, news, supply or financial advice.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-20.
JPYC Service Monitor: weekly change feed for Japan-related JPYC and Web3 services. Each event is dated, typed (added / updated / removed / verified) and tied to an official source URL. Call with changedSince=YYYY-MM-DD set to your last run date to fetch only what changed; an empty changes list explicitly means no change, so a scheduled agent can report that without guessing. Without changedSince you get the full monitor snapshot.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-20.
Norwegian company register (Brønnøysund Enhetsregisteret): by organisation number or name. Returns name, legal form, business and postal address, industry codes (NACE), employees, founding and registration dates, VAT registration, share capital, bankruptcy and liquidation flags, website. Sole proprietorships (ENK) are left out because their name is a person's name. Use it for KYC and supplier checks. NLOD 2.0.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-20.
Latest observation from a NOAA National Data Buoy Center station (US and international buoys and coastal stations): wind direction and speed, gusts, wave height and period, air and water temperature and pressure. Use it for sailing, surfing, offshore work and marine forecasts. Station id e.g. 46026 (San Francisco), 41001 (Cape Hatteras).
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-20.
Filtered provider list with pagination. Filter on state, county, ZIP, specialty, DSO/Independent, license status, Medicaid state-roster enrollment.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-20.
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.