Catalog

https://api.x402node.dev/chain/eth-tx

Look up arXiv preprint metadata

Look up arXiv preprint metadata. Returns title, authors, abstract, publish/update dates, categories, PDF URL, DOI, comme

Convert any DOI to BibTeX format via doi.org content negotiation

Convert any DOI to BibTeX format via doi.org content negotiation. Returns ready-to-paste BibTeX entry. Use ?doi=10.1038/

Look up scholarly metadata for any DOI via CrossRef

Look up scholarly metadata for any DOI via CrossRef. Returns title, authors, journal, publication date, abstract, citati

Format any DOI into a styled citation (apa, mla, chicago, ieee, harvard, vancouver)

Format any DOI into a styled citation (apa, mla, chicago, ieee, harvard, vancouver). Returns plain-text bibliography str

https://api.x402node.dev/color/contrast

https://api.x402node.dev/color/hex-to-rgb

https://api.x402node.dev/color/random

Monitor stablecoin peg deviation, collateral health, and depeg risk in real time

https://api.x402node.dev/feed/discover

https://api.x402node.dev/feed/parse

https://api.x402node.dev/feed/podcast

https://api.x402node.dev/finance/convert

Crypto price history over a window (CoinGecko free)

Crypto price history over a window (CoinGecko free). Returns daily price series (open/close per day), market cap, volume

https://api.x402node.dev/finance/crypto

https://api.x402node.dev/finance/forex

Historical forex rate for a specific date (ECB data via Frankfurter)

Historical forex rate for a specific date (ECB data via Frankfurter). Returns rates for the requested date, going back t

Detect real-time crypto arbitrage opportunities across centralized exchanges

https://api.x402node.dev/identity/avatar

Track DeFi TVL trends, chain dominance, and capital rotation signals

https://api.x402node.dev/identity/email-suggest

https://api.x402node.dev/identity/username-check

https://api.x402node.dev/identity/gravatar

Extract dominant colors from an image URL via 64x64 downsample + 3-bit-per-channel quantization

Extract dominant colors from an image URL via 64x64 downsample + 3-bit-per-channel quantization. Returns top N colors as