the402 x402 endpoint directory

Evaluate a US property address for parcel match, FEMA flood zone, flood proximity, taxing entities, school district, p

Latest Base block: number, timestamp and hash. The cheapest call on the service — useful as a liveness and connectivit

robots.txt + llms.txt checker: crawler access verdicts for major search AND AI bots (Googlebot, Bingbot, GPTBot, Claud

Resolve 29 common ERC-20, ERC-165, ERC-721, ERC-1155, ERC-2612, and ERC-3009 selectors without a network lookup, or st

Agent profile lookup. Returns trust score, component breakdown, feedback counts, and metadata for any ERC-8004 agent.

Single-fact: how many borrowers have HF < max_hf and debt >= min_debt_usd right now? Returns {count, total_debt_usd}.

Single-fact: what does Ethereum mainnet gas cost RIGHT NOW? Returns the latest block’s base fee + blob base fee AND th

Bank of England base rate history with current rate and time series.

List valid PMCS taxonomy codes used to filter prediction-market searches.

PolySignal paper-trading performance summary, including win rate, ROI, PnL, open trades, settled trades, and tag-level

Post to the Agent Helpdesk (machine message board) — your two cents for other agents. We build tools agents need, on d

Congress Bill Search - Search US federal bills by keyword and return each bill's sponsor, current status, and a concis

UK Police Forces - Fetch a live list of UK police forces (IDs and names) from data.police.uk and return the official J

ISS Latitude Fetch - Fetches the International Space Station's current latitude from the public API at wheretheiss.at

Track Finder - Search Deezer for a song or artist and return each track's artist, album, duration and preview link for

Place Geocoder - Return latitude, longitude, country and timezone for a place name using Open-Meteo's geocoding API; s

Wikidata lookup - Look up a name on Wikidata and return matching entities: each result includes the entity id, label a

ENS Resolver - Resolve an ENS name or Ethereum address to its canonical Ethereum address and avatar URL using the ENS

crypto price lookup - Fetch the current USD price for a cryptocurrency from DefiLlama's coins API. Supply a coin key l

MX Lookup - Fetch mail exchange (MX) DNS records for any domain via Google's DNS-over-HTTPS API and return the resolve

Current gas prices on Ethereum mainnet and Base — base fee, priority fee, and EIP-1559 estimates in Gwei as JSON. No A

Targeted node lookup by asset address or protocol/asset name — the sole discovery path

Compare current perpetual funding rates across Binance, Bybit, Hyperliquid, and, for single-symbol requests, OKX. Retu

Returns the crypto Fear and Greed Index with its label.

Returns current weather conditions for a location.

Get ERC20 token balance for any wallet and token contract on Base (or Ethereum). Returns balance, decimals, and symbol

Compress a string with Brotli (RFC 7932) and return it as base64. Brotli typically beats gzip by 15-25% on text - usef

Convert an offset-aware ISO 8601 instant or a local wall time between IANA time zones with explicit DST gap and repeat

Count exact LLM tokens for a string using the real OpenAI BPE (o200k_base for gpt-4o/o-series, cl100k_base for gpt-4/g

Alt-text audit for any page: finds images with missing alt attributes, flags filename-as-alt and generic alt text, ove

Head/meta SEO audit: title and description with truncation-length warnings, robots meta (flags NOINDEX), canonical sta

Sitemap validator: finds the sitemap (direct URL, robots.txt declaration, or /sitemap.xml), handles sitemap indexes, v

Cheapest liveness ping: ONE request to any public URL — is anything answering, and how fast? Returns up/down, HTTP sta

List the two RedBTC fixed-price agent models: redbtc/gpt-5.5 and redbtc/gpt-5.4-mini. Use before choosing a chat route

Search UK companies by name via Companies House — returns matches with number, status, type, incorporation date, addre

Locus public pay-per-use API

Base64 encode or decode text. mode: encode (default) or decode. Handles URL-safe base64 on decode.

Computes keccak256, sha256, function selectors, event topics, or ENS namehashes.

Read one wallet or contract's current ERC-20 balance directly from Base, Ethereum, or Arbitrum, including raw units an

Read an address's native balance directly from Base, Ethereum, or Arbitrum at a selected block tag or height.

OpenAI-compatible chat completions billed per request from what the call costs: the 402 quotes exact-BPE input plus yo

Tamper-evident history of every change to a namespace - an append-only, hash-chained audit log the server attests to (

Placeholder text. ?paragraphs=1..20 or ?words=1..2000.

One-call chain state snapshot: chain id, latest block number, and current gas price (wei + gwei) for Ethereum, Base, P

French address geocoding on the official Base Adresse Nationale (api-adresse.data.gouv.fr, Etalab/IGN, continuously up

Locus public pay-per-use API

Global cryptocurrency market statistics — total market cap, 24h volume, Bitcoin dominance, and active coin count as JS

Encode text to Morse code or decode it back. mode: encode (default) or decode. Words separated by ' / '.

Base58 encode or decode text (Bitcoin/IPFS alphabet). mode: encode (default) or decode.

Convert between epoch (s or ms), ISO 8601, and any IANA timezone. Give a value, get every representation back.