the402 x402 endpoint directory

Best execution price across DEXs on Avalanche C-Chain - which DEX is cheapest to buy on and which pays most to sell in

Raw AMM pool reserves and live pool state for a trading pair on Avalanche C-Chain. Constant-product and concentrated-l

DEX liquidity, market depth and TVL by venue for a trading pair on Avalanche C-Chain - how deep is this pool, and wher

Live token price in USD by ticker symbol or contract address on Avalanche C-Chain - any ERC-20, not a fixed list. Real

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

Price impact and slippage for a specific trade size on Arbitrum One - what will my trade actually get, not just the sp

Price impact and slippage for a specific trade size on Polygon PoS - what will my trade actually get, not just the spo

Price impact and slippage for a specific trade size on BSC / BNB Chain - what will my trade actually get, not just the

NYC tax-lot lookup via PLUTO (Primary Land Use Tax Lot Output) — every tax lot in the city with owner, zoning, lot/bui

Phone number validation API: is this number valid, what country is it from, and how should it be formatted (E.164, nat

Check whether an email address is well-formed and its domain can actually receive mail — RFC-style syntax check plus a

Foreign exchange rate API: the official daily reference rate for any major fiat currency pair (~30 ISO 4217 currencies

Redirect chain tracer: follows any shortened or redirecting link up to six hops and reports every URL in the chain alo

SSL certificate API: inspect any domain's TLS certificate — issuer, subject, validity window, days until expiry, SAN l

Page metadata API: extract the title, canonical URL, favicon, OpenGraph tags, Twitter card tags, description, author,

QR code API: any text or URL (up to 2000 characters) to a scannable PNG QR code, generated on our own hardware in mill

The official daily reference exchange rate between two major fiat currencies out of roughly 30 supported ISO codes, wi

DNS lookup API: resolve any DNS record type (A, AAAA, MX, TXT, NS, CNAME, SOA, CAA, SRV, PTR) for any hostname, with D

New token radar for Base: pools created in the last 24 hours that already hold real liquidity; ?minLiquidity sets the

Fetch a page from a tollbooth-registered domain. Costs the publisher's fee_credits from your credit balance (top up at

Resolve A and AAAA records for a public hostname via DNS-over-HTTPS (60s cache)

Convert structured data between csv, json, and yaml. Body: {data, from, to}. Returns the converted result. Use for dat

https://x402.openwebninja.com/realtime-events-data/search-events

Look up country metadata via REST Countries. Pass alpha2 (2-letter ISO 3166-1), alpha3 (3-letter), or name (with optio

Current token prices from DefiLlama. Query: coins — a comma list of coin ids like coingecko:bitcoin or <chain>:<addres

Curated shelf of public-domain adventure fiction, ranked by historical popularity. Returns title, author, year, book_i

Generate unique identifiers

Curated shelf of public-domain history texts spanning ancient to modern periods, ranked by historical popularity. Retu

Curated shelf of public-domain gothic and horror fiction, ranked by historical popularity. Returns title, author, year

Curated shelf of public-domain economics, politics, and political-theory texts, ranked by historical popularity. Retur

Curated shelf of enduring public-domain classic novels and literary works, ranked by historical popularity. Returns ti

Curated shelf of public-domain children's and young-adult classics, ranked by historical popularity. Returns title, au

Curated shelf of public-domain plays and dramatic works, including Shakespeare, ranked by historical popularity. Retur

Curated shelf of public-domain science and natural-history works, ranked by historical popularity. Returns title, auth

Curated shelf of public-domain poetry collections, ranked by historical popularity. Returns title, author, year, book_

Curated shelf of public-domain philosophy and ethics texts — from ancient to early-modern thought — ranked by historic

Resolve a food product barcode (UPC, EAN-13, EAN-8, etc.) to structured product metadata via Open Food Facts — the CC0

Curated shelf: Young women -- Fiction — 424 public-domain books including Pride and Prejudice, A Room with a View, Mid

Curated shelf: Young men -- Fiction — 11 public-domain books including Great Expectations, David Copperfield, A Portra

Curated shelf: War stories — 307 public-domain books including A farewell to arms, A Tale of Two Cities, War and Peace

Curated shelf: Triangles (Interpersonal relations) -- Fiction — 158 public-domain books including The History of Sir R

Curated shelf: Travel Writing — 3045 public-domain books including The Expedition of Humphry Clinker, Life on the Miss

Curated shelf: Tragedies (Drama) — 10 public-domain books including The Tragical History of Doctor Faustus From the Qu

Curated shelf: Teaching & Education — 1124 public-domain books including A Treatise on Domestic Economy; For the Use o

Curated shelf: Space ships -- Fiction — 192 public-domain books including The Misplaced Battleship, Plague Ship, From

Curated shelf: Sociology — 729 public-domain books including The Kama Sutra of Vatsyayana Translated From the Sanscrit

Curated shelf: Social classes -- Fiction — 9 public-domain books including Pride and Prejudice, Sense and Sensibility,

Curated shelf: Short Stories — 5470 public-domain books including The Extraordinary Adventures of Arsène Lupin, Gentle

Curated shelf: Sexuality & Erotica — 9 public-domain books including The Romance of Lust: A classic Victorian erotic n

Curated shelf: Science fiction — 3203 public-domain books including Frankenstein; or, the modern prometheus, The stran