the402 x402 endpoint directory

DEX liquidity, market depth and TVL by venue for a trading pair on Base - how deep is this pool, and where is the liqu

DEX liquidity, market depth and TVL by venue for a trading pair on Arbitrum One - how deep is this pool, and where is

DEX liquidity, market depth and TVL by venue for a trading pair on Polygon PoS - how deep is this pool, and where is t

Thin liquidity warning for a trading pair before you trade it. Classifies market depth DEEP, MODERATE, SHALLOW or VERY

Best execution price across DEXs - which DEX is cheapest to buy on and which pays most to sell into. Compares live pri

Raw AMM pool reserves and live pool state for a trading pair. Constant-product and concentrated-liquidity (Uniswap v3

Hacker News user profile by username. Returns id, account creation time (unix + ISO), karma, the about/bio text, numbe

Official Slovak business registry (RPO) search via api.statistics.sk (Statistical Office of the SR). Query: ?q=3133353

Polish company due diligence in one call, combining Biala Lista VAT (Ministry of Finance) and the KRS court registry.

Official Norwegian company registry (Enhetsregisteret) via data.brreg.no, Bronnoysund Register Centre. Query: ?q=equin

Irish company registry search on CRO open data (opendata.cro.ie, daily snapshot of the Companies Registration Office r

Official Finnish company registry via PRH YTJ open data v3 (avoindata.prh.fi). Query: ?q=nokia for name search (best m

Official Czech business register lookup via ARES (Ministry of Finance, ares.gov.cz). Query: ?q=skoda or ?q=00177041 (c

Live EORI (Economic Operators Registration and Identification) validation via the European Commission EOS/DDS2 service

Analyze HTTP response headers for a URL

Thin liquidity warning for a Base trading pair before you trade it. Classifies market depth DEEP, MODERATE, SHALLOW or

Best execution price across DEXs on Base - which DEX is cheapest to buy on and which pays most to sell into. Compares

Raw AMM pool reserves and live pool state for a trading pair on Base. Constant-product and concentrated-liquidity (Uni

Thin liquidity warning for a Arbitrum One trading pair before you trade it. Classifies market depth DEEP, MODERATE, SH

Best execution price across DEXs on Arbitrum One - which DEX is cheapest to buy on and which pays most to sell into. C

Raw AMM pool reserves and live pool state for a trading pair on Arbitrum One. Constant-product and concentrated-liquid

Thin liquidity warning for a Polygon PoS trading pair before you trade it. Classifies market depth DEEP, MODERATE, SHA

Best execution price across DEXs on Polygon PoS - which DEX is cheapest to buy on and which pays most to sell into. Co

Raw AMM pool reserves and live pool state for a trading pair on Polygon PoS. Constant-product and concentrated-liquidi

Prova hash verificável para conteúdo/manifest/endpoint

US inflation calculator — cumulative CPI inflation between any two years, e.g. what $100 in 1990 is worth today (?from

IP geolocation API - country, region, city, postcode, coordinates, timezone and network for any public IPv4 or IPv6 ad

RSS, Atom and RDF feed to clean JSON. Any public feed URL returns the feed title, link, description and last-updated,

Public and bank holiday API for 100+ countries, and the business-day answer behind it. Returns every holiday for a cou

Search autocomplete and keyword research API - what people actually type into a search box for any topic. Returns live

Web search API - free-text query to ranked organic results, each with title, real destination URL, display URL and sni

Weather API - current conditions and up to a 7-day forecast for any coordinates worldwide. Returns temperature, feels-

Live cross-DEX arbitrage scanner for OP Mainnet. Scans every liquid pair across SushiSwap and Uniswap v3 fee tiers and

Live cross-DEX arbitrage scanner for Avalanche C-Chain. Scans every liquid pair across Trader Joe, Pangolin and Uniswa

Live cross-DEX arbitrage scanner for Base. Scans every liquid pair across BaseSwap, SushiSwap and Uniswap v3 and retur

Live cross-DEX arbitrage scanner for Arbitrum One. Scans every liquid pair across SushiSwap and Uniswap v3 fee tiers a

Live cross-DEX arbitrage scanner for Polygon PoS. Scans every liquid pair across QuickSwap, SushiSwap and Uniswap v3 a

Live cross-DEX arbitrage scanner for BSC / BNB Chain. Scans every liquid pair across PancakeSwap v2 and v3 fee tiers,

Web article and PDF to Markdown converter API - fetch any public URL and get clean Markdown plus title, byline, site n

Reverse geocoding API - convert latitude and longitude coordinates to a street address and place name. Worldwide cover

Forward geocoding API - convert a street address, city or place name to latitude and longitude coordinates. Worldwide

Live gas prices across BNB Chain, Polygon, Arbitrum, Base, Avalanche and Optimism, converted to USD and sorted cheapes

Price impact and slippage for a specific trade size on OP Mainnet - what will my trade actually get, not just the spot

Thin liquidity warning for a OP Mainnet trading pair before you trade it. Classifies market depth DEEP, MODERATE, SHAL

Best execution price across DEXs on OP Mainnet - which DEX is cheapest to buy on and which pays most to sell into. Com

Raw AMM pool reserves and live pool state for a trading pair on OP Mainnet. Constant-product and concentrated-liquidit

DEX liquidity, market depth and TVL by venue for a trading pair on OP Mainnet - how deep is this pool, and where is th

Thin liquidity warning for a Avalanche C-Chain trading pair before you trade it. Classifies market depth DEEP, MODERAT

Price impact and slippage for a specific trade size on Avalanche C-Chain - what will my trade actually get, not just t

Live token price in USD by ticker symbol or contract address on OP Mainnet - any ERC-20, not a fixed list. Real-time s