Memoryapi

Look up an ERC-8004 AI agent identity on Base mainnet. Returns name, description, services, x402 support, and owner.

Browse ERC-8004 registered AI agents on Base. Filter by x402 payment support.

Get ERC-8004 registration JSON for memoryapi.org — a complete example of an AI agent registration file with 28 MCP services and x402 support.

arXiv AI/ML paper search — recent submissions by keyword and category (cs.AI, cs.LG, cs.CL, cs.CV, cs.RO, stat.ML).

AI/ML research papers from HuggingFace — trending daily papers or keyword search. Filter by date or query.

Semantically search stored agent memories using natural language

Retrieve change alerts for monitored URLs. Returns list of detected changes with timestamps.

U.S. County Business Patterns — number of businesses, employees, and payroll by industry (NAICS) and state.

U.S. Census demographic data by state or county. Population, income, poverty, unemployment, home values, education.

List recent SEC filings for any public company. Filter by form type (10-K, 10-Q, 8-K, 4, etc).

Compare nutrition between multiple foods side-by-side by USDA FDC IDs.

Full nutrition profile for a specific food by USDA FDC ID — macros, vitamins, minerals.

Forward and reverse geocoding via OpenStreetMap Nominatim. Convert addresses to coordinates or coordinates to addresses.

Find Points of Interest (POI) near a location. Search for restaurants, cafes, hotels, hospitals, pharmacies, banks, and 20+ other amenity types using OpenStreetMap.

Timezone lookup by coordinates, IP address, or country code/name. Includes country details.

Current weather conditions and multi-day forecast for any location. Powered by Open-Meteo.

IMF GDP & macroeconomic indicators — GDP growth, inflation, government debt, current account, GDP per capita for 180+ countries.

OECD country comparison data — long-term interest rates, trade balance, and CPI for G7 and major economies.

WHO Global Health Observatory — life expectancy, obesity, alcohol, air pollution by country.

Real-time arbitrage spreads between tokenized securities and actual stock prices. Identify premium/discount opportunities.

Economic event calendar from FRED with sector performance from FMP. Upcoming key economic releases.

Cross-exchange cryptocurrency arbitrage opportunities. Find best buy/sell prices across major exchanges.

Perpetual futures funding rates. Monitor long/short crowding and market sentiment across major exchanges.

Currency exchange rates USD vs major currencies. Historical rates from FRED (St. Louis Federal Reserve).

Major market indices and macro indicators: S&P 500, NASDAQ, VIX, 10-Year Treasury, WTI Oil, Gold, USD/EUR from FRED.

Pre-IPO and private company token prices — SpaceX, OpenAI, and other unicorns trading as tokenized assets via CoinGecko.

Real-time stock price quotes for one or more ticker symbols. Returns price, % change, 52-week high/low, exchange, and currency.

Market sentiment indicators: crypto Fear & Greed Index and traditional market VIX volatility.

Stablecoin peg monitoring. Track deviations from $1.00 USD peg for major stablecoins.

Tokenized securities prices from CoinGecko. Real-time quotes for tokenized stocks and real-world assets (RWA tokens).

x402 API activity stats — top endpoints by paid calls, trend data, and unique payer counts from memoryapi.org nginx logs.

Hacker News top stories — titles, URLs, scores, authors, and comment counts.

Trending news combining Hacker News and The Guardian for a given topic.

Get detailed information for a specific Polymarket prediction market including prices, outcomes, and trading volume.

Browse Polymarket prediction markets. Filter by category (crypto, politics, sports, economics, science, entertainment, pop-culture), search by keyword, or set limit.

Find prediction market arbitrage across Polymarket, Kalshi, and Manifold.

Sunrise, sunset, twilight, moonrise and moonset for any location — from the US Naval Observatory.

PubMed/NCBI biomedical research — 34M+ citations with full abstracts.

Translate text between 11 languages — EN ES FR DE IT PT ZH JA AR RU KO

FDA drug approval history and NDA applications — application number, applicant, brand name, dosage form, first approval date.

NCBI Gene database — gene function, chromosome location, aliases, and disease associations.

RCSB PDB 3D protein structure data — PDB ID, title, experimental method, resolution, chains, molecular weight.

Drug target and bioactivity data from ChEMBL (EMBL-EBI) — ChEMBL ID, max clinical phase, molecular properties, indication class.

UniProt protein sequences and function data — accession, gene name, sequence length, organism, and function summary.

All clinical trials for a specific medical condition. Get competitive landscape of trials in a disease area.

All clinical trials by a sponsor company. Track a biotech/pharma company complete trial portfolio.

ClinicalTrials.gov — aggregate statistics for a condition: counts by status, phase, and top sponsors.

ClinicalTrials.gov — get full details of a specific trial by NCT ID including eligibility, outcomes, and locations.

ClinicalTrials.gov — search clinical trials by condition, intervention, sponsor, status, or phase.

Recently updated clinical trials. Monitor for status changes, new results, enrollment updates in any disease area.

FDA drug recalls and adverse event reports from openFDA. Search by drug name or company.

NIH research grants — funded projects with award amounts, PIs, organizations, and abstracts. Filter by query, fiscal year, and institution.

ClinVar genetic variants — pathogenic/benign variants for any gene with clinical significance and conditions.

Analyst stock ratings and price targets from Finnhub. Consensus recommendations (Strong Buy, Buy, Hold, Sell) with analyst price target distribution.

Recent earnings announcements from SEC EDGAR Form 8-K filings. Search by company or get all earnings in past N days.

Company fundamentals from SEC EDGAR XBRL filings. Revenue, net income, EPS, assets, liabilities, and equity for any publicly-traded company.

Institutional investor SEC Form 13F filings. Look up any institution by CIK or name to get their latest 13F filing date and link.

Financial news with sentiment analysis from Marketaux. Per-symbol sentiment aggregation.

Technical analysis indicators (RSI, MACD, Bollinger Bands, EMA) from Alpha Vantage. Limited to 25 req/day.

Find sports betting arbitrage opportunities from The Odds API.

Look up researcher and scientist profiles from OpenAlex. Filter by name and institution.