the402 x402 endpoint directory

Is B20 live on Base mainnet? Queries the Activation Registry precompile for base.b20_asset and base.b20_stablecoin (or

Public holidays for a country and year via Nager.Date (keyless, 100+ countries): date, local name, English name, natio

Inspect a PDF without downloading the whole thing into your model: page count, title, author, subject, creator, produc

Parse iCalendar (.ics) text into structured JSON events: summary, start/end, location, organizer, attendees, status, a

Pull emails, URLs, IPv4s, @mentions, and #hashtags out of free text. Returns deduped lists.

Top keywords and two-word phrases by frequency (stopwords removed). Cheap, deterministic signal for routing, tagging,

Compute the current TOTP code (RFC 6238, 30s period, SHA-1, 6 digits) from a base32 secret. Useful for agents that mus

Look up the MEV-Boost payment for a specific slot or block number via the Flashbots relay. Returns the builder, propos

Get the current floor price for an NFT collection across OpenSea + LooksRare (Ethereum). Returns per-marketplace floor

Lookup a Farcaster profile by username or FID. Returns FID, username, display name, bio, profile picture URL, follower

List Kalshi markets (CFTC-regulated US event contracts). Filter by status (open/closed/settled/unopened) or by event t

Spot quote for swapping through a Uniswap V3 pool at the current tick. amountIn is in human units (not wei). zeroForOn

Label a known EVM address from a curated, committed dataset: major stablecoin + token contracts (USDC on every chain w

Look up the native coin balance (ETH/MATIC) plus every ERC-20 holding for a wallet address on Ethereum, Base, Polygon,

For one operation, return the minimum set of inputs an agent must provide to make a successful call. Locate the op by

Validate a JSON payload against the request or response schema for one operation in an OpenAPI 3.x or Swagger 2.x spec

Flatten an OpenAPI 3.x or Swagger 2.x spec into a structured list of callable endpoints - one row per operation with m

Validate an A2A (Agent2Agent protocol) Agent Card: required fields, skill shape, transport names, capability flags - s

Infer a draft-07 JSON Schema from sample JSON document(s). Send one sample as json, or several as samples. Heuristic m

Convert subtitles between SRT, WebVTT, plain text, and JSON cues. Send SRT or VTT text (auto-detected) - or a JSON cue

Mask emails, phone numbers, credit-card-like numbers, IPs, and SSNs in text. Returns the redacted text and counts by t

Validate an email address: syntax check plus live MX record lookup on the domain (deliverability signal, not a guarant

Convert an HTML fragment or document you already have into clean markdown. (To fetch + convert a live URL, use /api/ex

Parse YAML into JSON (safe schema - no code execution).

Recall remembered text by similarity to a query (ranked by cosine similarity), not by exact key. Returns the top-k mat

Japanese government bond yield curve (1 to 40 years, 15 tenors) from the Ministry of Finance's daily reference series.

Cabinet Office Composite Index (CI), one of leading/coincident/lagging, 2020=100, monthly since 1980. Same e-Stat API

Japan's unemployment rate from the Statistics Bureau's Labour Force Survey, not seasonally adjusted, monthly since 200

Individual yen foreign-exchange intervention operations (date, amount, currency pair) from the Ministry of Finance's o

How much of an ERC-20 token a spender contract is approved to move from an owner wallet - the approval check an agent

Blockchains ranked by DeFi total value locked with each chain's share of the total, native token, EVM chain id and Coi

USD price for up to 50 Solana token mints in one call from Jupiter's price API v3: price, 24h change, liquidity, decim

ERC-20 balances of one wallet for a NAMED list of token contracts (1-20) - the targeted complement to the full-portfol

One DeFi protocol in full: TVL rank, TVL per chain, recent change, market cap to TVL, token, website, audits and paren

Onchain options protocols ranked by 24h notional volume with 7d and 30d volume, 1d and 7d change and the chains each r

Daily total stablecoin supply in USD over time, for all chains or one chain, per peg currency, with a window summary.

Daily APY and TVL history for one yield pool, up to ten years, with a summary of latest, minimum, maximum and mean APY

One options instrument live: mark, last, bid and ask with sizes, index price, open interest, mark, bid and ask implied

Daily total value locked history for one chain or for all of DeFi, up to ten years of points, with latest, first, mini

Resolve a Solana token by mint, ticker or name through Jupiter's token index and get its profile in one read: name, sy

The live level-2 order book for one perpetual: best bid and ask, mid, spread in basis points, up to 20 levels a side w

Federal contract opportunities (SAM.gov) by NAICS code — Sources Sought and Presolicitation notices with the contracti

Validate JSON against a JSON Schema. Checks LLM and agent output and API request payloads, returning structured errors

DeFi math helper: APR and APY conversion, funding annualization, impermanent loss, liquidation price, and leverage. Pu

Search foods by name in USDA FoodData Central (public domain). Returns ranked matches with fdc_id, description, brand,

Forward-geocode a street address or place name (WORLDWIDE) to coordinates + parsed address components via OpenStreetMa

Extract every link from a public page for crawling agents: de-duplicated absolute URLs with anchor text, internal/exte

Parse an RSS, Atom or JSON Feed URL into a normalized item list (title/link/published/summary/id/author) plus feed-lev

List EAS (Ethereum Attestation Service) attestations for an address as recipient, attester, or either, on mainnet/Base

Synthesize a JSON response body for one operation + status code in an OpenAPI 3.x or Swagger 2.x spec. Locate the oper