Go module github.com/pkg/errors: latest version, description, license, repository and download/publish data from the go registry API. Pin, audit or compare github.com/pkg/errors in one call, no token. $0.01 per call.

Annotate an image with detections using supervision's annotators (box, round_box, box_corner, circle, dot, ellipse, triangle, label, color, mask, polygon, halo, background_overlay, blur, pixelate, percentage_bar), applied in order. Input: base64 image up to 4 megapixels, up to 500 detections with xyxy pixel boxes and optional class_id, confidence, ASCII label, polygon. Returns the annotated image (base64 PNG or JPEG), size and counts per class.

Local insider tips for ski and mountain travel from people on the ground, each with its resort, country and date (e.g. early glacier snowpark openings). One payment returns every current tip; ?id=<tip-id> returns one. Tips are in the local language (currently Slovak), plain text.

Open prediction markets mentioning a US stock ticker or company, Polymarket + Kalshi in one call, for trading agents (Coinbase for Agents / x402 market data). $CASHTAG or company name in, implied probability, 24h change, volume, close date and url out. Facts only - not a buy/sell/hold signal. ?q=TSLA or ?q=Tesla&limit=1-50.

Prediction market search for AI agents - one query, live markets from Polymarket AND Kalshi ranked by relevance: question, implied probability (YES price), 24h/7d change, bid/ask, volume, liquidity, close date, URL, and the ids you need for /pm/history. Election odds, Fed/rates, crypto price targets, sports, geopolitics, pop culture. ?q=<question or topic>&limit=<1-50>. Want a finished answer with a cross-platform read? /pm/odds $0.02.

US court opinion search on CourtListener (Free Law Project): case name, court, date filed, docket number and the opinion link. Short queries match as a phrase (?q=fair use), longer ones need every word. Cached; a query not yet cached is fetched live.

x402 Doctor: why a payment failed, in plain words: the cause, whose side it is on (your client, your wallet, the network, the seller or the facilitator) and how to fix it, from over 40 named causes (x402 and Coinbase facilitator codes, EVM and Solana, HTTP and network errors). Send the seller 402 as challenge and the error as response, by POST JSON or GET query. Unknown failures are reviewed nightly.

SEC EDGAR company profile for a ticker or CIK: SIC, fiscal year end, addresses, and recent filings.

x402 Doctor checkup of your own endpoint: payment request, prices, payTo and response time; once you prove you own the host (publish the token from /v1/doctor/verify at /.well-known/x402-doctor.txt), also a leak check: does it serve data without payment.

Search the national open data portal of Austria (data.gv.at) by keyword, or fetch one dataset by id: title, publishing organization, last modified date where the portal gives one, number of files and the official link, under the portal's licence terms (a dataset's own licence is on its official page). Uncached: 404, not charged, fetched within about a minute.

Businesses in Brazil from the Receita Federal CNPJ register (official monthly release), sole traders and MEI included. Search by name, trade name and town, or fetch one by CNPJ (14 digits, or the 8-digit root). Name, trade name, legal form, status, start date, main activity (CNAE), address, business phone and e-mail as filed, share capital, size. Sole traders: no CPF, address to town only. No match: 404, not charged.

One Canadian federal corporation from Corporations Canada open data, by corporation number or 9-digit business number: status, governing act, current and former names, registered office. Lookup by number only; name search is not available.

Search the national open data portal of Australia (data.gov.au) by keyword, or fetch one dataset by id: title, publishing organization, last modified date where the portal gives one, number of files and the official link, under the portal's licence terms (a dataset's own licence is on its official page). Uncached: 404, not charged, fetched within about a minute.

Where to eat at a ski resort: restaurants, cafes, mountain huts and bars near the resort's arrival point (ticket office or main lift). tier=near: within 1 km ($0.02); tier=around: 1 to 15 km ($0.02). Nearest first, with distance, cuisine, opening hours, and the full menu (dishes and prices) of every restaurant in the tier that has one on file. Says how many are in the other tier. No Google data.

Restaurant menu with prices: the dishes and drinks of one restaurant with prices where shown, section, portion, currency and the menu's date, from the restaurant's own website or, when it has none online, a delivery app (Wolt, Bolt Food, Glovo, Pyszne.pl; named in the answer). Only restaurants with menuItemCount > 0. No Google data.

Search the national open data portal of Switzerland (opendata.swiss) by keyword, or fetch one dataset by id: title, publishing organization, last modified date where the portal gives one, number of files and the official link, under the portal's licence terms (a dataset's own licence is on its official page). Uncached: 404, not charged, fetched within about a minute.

UK Companies House company profile by company number, or search by name: name, status, type, incorporation and cessation dates, registered office, SIC codes, accounts and confirmation-statement dates, charges and insolvency flags. Cached; an uncached company is queued.

Laws of Switzerland from Fedlex: search by title, or fetch one act by its official id, with title, in-force status, dates and the official link. An id or search not yet cached answers 404, not charged, and is fetched within about a minute.

Search Canada's federal open data portal (open.canada.ca) by keyword, or fetch one dataset by id: English and French titles, publishing organization, last modified date, number of resources and the total match count.

One Canadian federal act from the Justice Laws consolidated statutes, by code (e.g. C-46): English and French titles, in-force status, last amended and current-to dates, and optionally its section text.