{"name":"Callrack","description":"Callrack is a pay-per-use information infrastructure platform - academic, news, market, weather, geocoding, knowledge, government, and research-aggregation capabilities, each paid per request in USDC on Algorand via x402.","url":"https://api.callrack.xyz","version":"0.1.0","capabilities":{"streaming":false},"defaultInputModes":["application/json"],"defaultOutputModes":["application/json"],"skills":[{"id":"academic.search","name":"Academic Search","description":"Search scholarly literature via OpenAlex (falling back to Crossref) and return normalized works with titles, authors, publication years, DOIs, journals, citation counts, and open-access status. Paid per call via x402 (0.01 USDC).","tags":["x402","algorand","academic"]},{"id":"academic.work","name":"Academic Work Lookup","description":"Retrieve a single scholarly work by DOI via OpenAlex (falling back to Crossref) and return its normalized title, authors, publication year, journal, citation count, and open-access status. Paid per call via x402 (0.005 USDC).","tags":["x402","algorand","academic"]},{"id":"news.search","name":"News Search","description":"Search recent news coverage via GDELT and return normalized articles with titles, URLs, source domains, publish dates, languages, and countries. Paid per call via x402 (0.01 USDC).","tags":["x402","algorand","news"]},{"id":"news.trends","name":"News Trends","description":"Return normalized daily news-coverage volume for a topic, entity, or event via GDELT as a time series of dated volume points. Paid per call via x402 (0.02 USDC).","tags":["x402","algorand","news"]},{"id":"crypto.price","name":"Crypto Price","description":"Get current price and 24-hour change for one or more cryptocurrency assets in a specified quote currency via CoinGecko. Paid per call via x402 (0.002 USDC).","tags":["x402","algorand","crypto"]},{"id":"crypto.market","name":"Crypto Market Data","description":"Get market capitalization, rank, 24h volume, and circulating/total/max supply for one or more cryptocurrency assets via CoinGecko. Paid per call via x402 (0.005 USDC).","tags":["x402","algorand","crypto"]},{"id":"fx.rates","name":"FX Reference Rates","description":"Get current or historical foreign exchange reference rates for a base currency against one or more target currencies via Frankfurter (ECB data). Paid per call via x402 (0.002 USDC).","tags":["x402","algorand","finance"]},{"id":"weather","name":"Weather Forecast","description":"Get current conditions and a multi-day daily forecast (temperature, humidity, wind, precipitation) for a coordinate via Open-Meteo. Paid per call via x402 (0.003 USDC).","tags":["x402","algorand","weather"]},{"id":"geocode","name":"Geocode","description":"Forward geocode a place name to coordinates, or reverse geocode coordinates to a place, via Photon, returning normalized address components. Paid per call via x402 (0.002 USDC).","tags":["x402","algorand","geography"]},{"id":"holidays","name":"Public Holidays","description":"Retrieve public holiday dates and names for a specified country and year via Nager.Date, including whether each holiday is observed nationwide. Paid per call via x402 (0.002 USDC).","tags":["x402","algorand","calendar"]},{"id":"knowledge.search","name":"Knowledge Search","description":"Search Wikidata for entities matching a free-text query and return normalized entity names, descriptions, and reference URLs. Paid per call via x402 (0.005 USDC).","tags":["x402","algorand","knowledge"]},{"id":"government.census","name":"US Census Query","description":"Query a constrained subset of US Census Bureau statistical datasets and return the requested variables as normalized rows for the specified geography. Paid per call via x402 (0.01 USDC).","tags":["x402","algorand","government"]},{"id":"research","name":"Research Composition","description":"Aggregate information from selected Callrack research capabilities (academic, news, knowledge, and optionally government) and return structured research evidence with per-source status; deterministic composition, not an AI-generated answer. Paid per call via x402 (0.05 USDC).","tags":["x402","algorand","research"]},{"id":"information.verify","name":"Verify","description":"Verify a claim against existing Callrack capabilities (academic, news, knowledge) and return a deterministic verdict - supported, contradicted, mixed, or insufficient - with the underlying evidence. Uses explainable lexical term-overlap and negation-cue heuristics, never an LLM or semantic entailment. Paid per call via x402 (0.05 USDC).","tags":["x402","algorand","information"]},{"id":"information.evidence","name":"Evidence","description":"Return a machine-readable evidence pack for a query - real results from academic, news, and knowledge search with full source provenance and retrieval timestamps, never an AI-generated narrative answer. Paid per call via x402 (0.05 USDC).","tags":["x402","algorand","information"]},{"id":"information.compare","name":"Compare","description":"Compare information gathered from academic, news, and knowledge search for a query - distinct subjects, a flattened table of real attribute values, deduplicated sources, and any detected disagreements. Never fabricates a value a provider did not return. Paid per call via x402 (0.10 USDC).","tags":["x402","algorand","information"]}]}