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Showing the 19,086 endpoints that answered our last unpaid knock, most recently knocked first. The catalogue holds 76,774 listings in all: 18,505 charge, 638 answered without asking, 8,860 did not reach a working endpoint, and 48,771 we have never knocked on. Type something above to search all of them.
Generate an image from a text prompt (PNG). Text-to-image with Google's Gemini image model. Aspect ratios 1:1, 3:2, 2:3, 3:4, 4:3, 4:5, 5:4, 9:16, 16:9, 21:9. Prompts refused by the model's safety filter are not charged.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-21.
Packaged food profile by barcode: name, brand, Nutri-Score, NOVA processing group, nutrition per 100 g and data quality.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-21.
Does a packaged food fit a vegan, vegetarian, palm-oil-free or gluten-free diet, per its ingredient analysis and labels.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-21.
Read text from an image (OCR), 7 languages. Optical character recognition on an image URL (png, jpg, webp, tiff, bmp, gif; up to 15 MB) with Tesseract. Languages eng, deu, fra, spa, ita, por, nld, combinable with + (e.g. eng+fra).
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-21.
Census geography at a US coordinate: state, county, tract, block, city or place, with GEOIDs for joining Census data.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-21.
Audio file size from bitrate and duration, or the bitrate or duration it implies; PCM size from rate, depth and channels.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-21.
Strale — 191 compliance/KYB/company-data checks over x402: sanctions/PEP/AML/adverse-media screening, company registries (UK/US/EU/JP/BR & more), email & domain trust, trade/customs/shipping, web3 due-diligence /solutions/*. POST { endpoint, ...input }. Caps 3¢–$1.19; user pays actual settle. See compliance-data knowledge doc or vaaya/discover.
The price is the seller’s own listing. it answered us without asking for payment, once, on the day we knocked, on 2026-10-21.
Standard atmosphere at an altitude: temperature, pressure, density, sound speed, and ISA deviation for a measured temperature.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-21.
Forecast now at any latitude and longitude: temperature, feels-like, wind, humidity, cloud, and the next 1, 6 and 12 hours.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-21.
Growing degree days from daily max and min temperatures: modified corn 86/50 F method or the simple standard average.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-21.
Bulk is email hosted by hetzner mail: up to 20 domains in one call, processed concurrently, results in input order with a per-item error field and a failure count. Same answer per item as the single endpoint. Batch enrichment for agents that hold a list. $0.10 per batch.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-21.
Hacker News full-archive search: stories, comments, Show HN and Ask HN with points, comment counts and URLs
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-21.
PyPI project facts: latest version, Python requirement, license, release freshness and whether the latest is yanked.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-21.
Hours of difference between two IANA time zones on a given date, with each offset, accounting for daylight saving.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-21.
Screen an ERC-8004 (Trustless Agents) agent identity: resolve tokenURI on the on-chain Identity Registry, fetch and parse the agentURI (ipfs/https/data:), live-probe its declared service endpoints (bounded), sample the reputation registry, and return a signed registered/reachable/grounded verdict. $0.01.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-21.
Resolve an ENS .eth name to its address (plus avatar, url and twitter records), or an address to its verified primary ENS name. Reads Ethereum mainnet via the ENS Universal Resolver.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-21.
Computes a SHA-256, SHA-512, or MD5 hash digest of provided text.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-21.
One block's fee recipient, gas use and burnt fees, with its consensus reward. PulseChain (chain id 369). $0.003 USDC per call.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-21.
A/B Test Readout Check — Checks the written readout of ONE A/B test (a paragraph, an email, a table or a slide transcript) for the five statistical mistakes that turn a no-effect test into a "win", and lists only those, one line each with a fixed code, the place, the evidence with the arithmetic and the fix - or exactly No findings. It catches stopping the moment a result looks significant, many metrics or variants judged without correction, a split of users that differs from the planned split …
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-21.
Read a public web page and return just the fields you name as JSON (e.g. price, author, date, address). Missing fields come back null; values are taken from the page, never invented. Respects robots.txt.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-21.
Current weather at up to 10 airports at once: flight category, wind and ceiling for each, worst first.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-21.
Daily technical snapshot for a vendor-resolved equity from licensed Tiingo adjusted closes: Wilder RSI-14, 20-session momentum, SMA-20/SMA-50, price distance from each average, above/below/mixed trend state, and the latest observed golden/death cross. Price and averages retain Tiingo payload units because the captured feed does not identify a currency.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-21.
Prüft am Objekt video den Befund Verbindungsaufbauzeit.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-21.
Morse code encode or decode (ITU-R M.1677) with dot/dash timing in units and milliseconds at a chosen words per minute.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-21.
Official French company registry search via recherche-entreprises.api.gouv.fr (INSEE Sirene data, updated daily). Query: ?q=airbus or ?q=383474814 (name or SIREN), optional per_page (1-10), page, code_postal, activite_principale (NAF, e.g. 70.10Z), etat_administratif (A active / C ceased). Returns SIREN, legal form, NAF, HQ address, employee range, status and published finances per company. Personal data on directors is stripped (GDPR). 24h cache.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-21.
List the vehicle types (car, truck, motorcycle, MPV) NHTSA records for a make, separating exact make matches from look-alikes.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-21.
CSS selector specificity (ids, classes, types) per Selectors Level 4, including :is(), :not(), :where() and :has(); compare two.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-21.
WCAG contrast ratio between two hex colors with AA and AAA pass/fail for normal and large text.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-21.
The Vinyl Revival Experience — Record store experience for analog music appreciation and physical media culture.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-21.
Shannon entropy in bits per symbol from a frequency table, plus min-entropy, collision entropy and efficiency.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-21.
Convert a number between bases 2 to 36 exactly (binary, octal, decimal, hex), with big-integer precision.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-21.
Hash and attest supplied delivery evidence
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-21.
Card odds: 5-card and 7-card poker hand probabilities, chance of hitting your outs by the river, blackjack natural odds.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-21.
Find a US-listed company by name: matching tickers and SEC CIK numbers, best match first.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-21.
E6B wind triangle: wind correction angle, heading and groundspeed for a course, or track and groundspeed for a heading flown.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-21.
Posts, rails and pickets for a straight fence from its length, post spacing, picket width and gap.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-21.
Structural diff of two JSON documents: every added, removed, changed or retyped path.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-21.
Name a chord from its notes (C E G Bb, A C E G): best name, inversion and alternative names; first note is the bass.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-21.
Health of a Ruby gem on RubyGems: latest release age, downloads, license, version counts, owners and links.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-21.
One-way ANOVA across 2 to 12 groups: F statistic, degrees of freedom, p-value, eta squared and omega squared, with group means.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-21.
Approximate grams per cup, tablespoon and teaspoon for baking ingredients, with the published sources and spread.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-21.
x402engine — Capture a screenshot of any URL — returns base64-encoded image, supports full-page capture
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-21.
AWG copper wire: diameter, area and resistance per km, the nearest AWG for an area, and voltage drop over a run.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-21.
Pages from a word count at your words-per-page figure, rounded up, plus even page count and sheets for print.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-21.
List the vehicle makes NHTSA records for a vehicle type (car, truck, motorcycle, bus, trailer), with an optional name filter.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-21.
Aspect ratio, megapixels, common name and uncompressed data rate for a video frame size, chroma subsampling and fps.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-21.
Periodic table lookup by symbol, name or atomic number: weight, configuration, electronegativity, melting and boiling points.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-21.
Live on-chain spot prices for every token on the Hyperliquid DEX (HYPE, PURR, and hundreds more), quoted in USDC: mid/mark price, previous-day price, 24h USD and base volume, circulating and total supply, and market cap — sorted by 24h volume. Spot, not derivatives: for funding/open interest use /api/v1/perps; for major-coin fiat prices use /api/v1/crypto. From x402stock
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-21.
Find an x402 service by name or domain: category, endpoints, lowest price, status and 30-day buyers.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-21.
Recent blocks, newest first. PulseChain (chain id 369). $0.003 USDC per call.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-21.
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.