the402 x402 endpoint directory

End-of-day OHLCV bars for every US-listed ticker on a single date; one call returns the entire market. Pass `?date=YYY

Live state of every perpetual-futures market in one call: per coin the mark and oracle price, hourly funding rate with

Wallet intelligence: EOA-vs-contract, ETH+USDC balance, tx count, activity/risk flags.

Rug/safety scan of an ERC-20 token: mint, blacklist, pausable, tax, upgradeable-proxy, ownership.

Live token price, liquidity, FDV, 24h volume & change via DEX aggregation.

Current gas price + base fee for a chain, with an ERC20-transfer cost estimate.

Identify an address: EOA vs contract, token standard (ERC20/721/1155), proxy, metadata.

ENS resolution: name->address (forward) or address->primary name (reverse). Ethereum mainnet.

Audit any x402 service's discovery surface: catalog, /.well-known/x402, llms.txt, openapi.json, agent-card, mcp-tools.

Hourly Bittensor subnet registration activity (NeuronRegistered event count per subnet) + current burn-cost per subnet

Latest TAO network-wide fundamentals: total issuance, total stake, free float, supply percentage mined, stake ratio. S

Book search over Open Library: title, authors, first publication year, subjects, ISBNs and edition count

Search hotels via Google Hotels (SerpApi). Returns properties with prices, ratings, and amenities.

OFAC SDN sanctions screening for a crypto address or a person/company name. Covers all 963 digital-currency addresses

Enumerate a site's URLs from robots.txt + sitemap.xml (sitemap-index aware) — map a domain before crawling it

Crawl a site from a start URL (same-domain, breadth-first) and return each page as clean Markdown

Parse an RSS/Atom feed into structured items (title, link, published, summary) — or auto-discover the feed from a site

Fetch a URL and return its main content as clean Markdown (boilerplate stripped)

Fediverse posts: search any Mastodon instance or read its public timeline, with author, engagement and hashtags

Lemmy (fediverse link aggregator) posts from an instance or a single community, with score and comment counts

Hacker News full-archive search: stories, comments, Show HN and Ask HN with points, comment counts and URLs

Bluesky (AT Protocol) public data: an account's profile plus recent posts with engagement counts, or a keyword post se

Known vulnerabilities for a package (OSV.dev — aggregate of GHSA, PyPA, RustSec, Go and more) or a free-text CVE searc

Stack Exchange question search with score, answer count and whether an answer was accepted

Supply-chain health from deps.dev: OpenSSF Scorecard (14 checks — branch protection, signed releases, pinned deps…) pl

Package intelligence across npm, PyPI and crates.io in one call: latest version, license, repository, dependencies and

Search the Hugging Face Hub for models or datasets (downloads, likes, task, library, tags) or fetch one by id

Public GitHub facts: repo stats with latest release, a user/org profile, or a star-ranked repo search

Docker Hub image facts: pull count, stars, description, last push, and recent tags with sizes and architectures

Domain registration facts over RDAP (structured WHOIS): registrar, creation and expiry dates, status codes, nameserver

Internet Archive lookup: whether a snapshot of a URL exists and its closest capture to a given date — read pages that

US SEC filings data: resolve a ticker to its CIK, then pull a reported XBRL financial concept (Revenues, Assets, NetIn

Biomedical literature search over PubMed (NCBI, 37M+ citations): titles, journals, authors, dates and DOIs

Academic literature search over OpenAlex (250M+ works with citation counts) or arXiv: title, authors, year, venue, DOI

Public holidays for a country and year (ISO-2 code) — what a scheduling agent needs before proposing a date

Place name to coordinates, or coordinates to address (OpenStreetMap Nominatim), with country and feature type

Country reference data: capital, region, population, area, currencies, languages, calling code, timezones and borders

Fiat FX rates + amount conversion over free public APIs (Frankfurter/ECB primary, open.er-api fallback, 160+ currencie

Compare a domain against a caller allowlist using edit distance and visual confusable skeleton similarity.

Parse common EU address strings into street, number, postcode and city, with postcode syntax validation per country.

Validate up to 500 mixed financial identifiers in one call. Each item may specify type iban, vat, card or auto.

Check token amount decimals, dust, unusually round/precise values and mismatch against a stated invoice amount.

SEC 13F Institutional Holdings

Full-text search across the entire indexed public-domain corpus. Returns the most relevant passages from any book with

On-chain Portfolio (USD-valued)

Ethereum volume-weighted average price in USD for order execution and fair value — Ed25519 signed attestation

Bitcoin volume-weighted average price in USD for order execution and fair value benchmarking — Ed25519 signed attestat

Bitcoin volume-weighted average price in EUR for European market execution — Ed25519 signed attestation

Solana spot-futures basis and annualized carry — cross-venue arbitrage signal for basis traders — Ed25519 signed attes

Ethereum spot-futures basis and annualized carry — cross-venue arbitrage signal for basis traders — Ed25519 signed att