the402 x402 endpoint directory

Maximum-safe LTV for collateralized agent loans. Computed from (cv + λ·j²)-derived variance over loan horizon + 6-mode

Returns all 30 NBA teams with IDs and conference.

Single-fact: current Monero chain height + sync status. Sourced from a live operator-run monerod node.

Offline validation of product barcode numbers: EAN-8, UPC-A, EAN-13 and GTIN-14, using the GS1 mod-10 weighted checksu

Latest European Central Bank reference exchange rates, normalized JSON. Query: ?base=EUR&symbols=USD,GBP,JPY (symbols

Returns the Bitcoin spot price in USD.

Compact line-level diff between two texts.

Top DeFi yield farming pools ranked by APY across 500+ protocols and chains — pool, protocol, chain, APY, and TVL as J

List the wallets you've granted access to your namespace, with their mode and expiry.

Current time: UTC ISO, epoch seconds/ms, day of week/year, ISO week - optionally rendered in any IANA timezone via ?tz

Generates PNG or SVG QR codes from text, URLs, vCards, or WiFi strings.

Single-fact: ZEC supply by value pool (transparent/sprout/sapling/orchard/ironwood/lockbox) + NU6.3 "Ironwood" migrati

Fund any address with testnet money via the Coinbase faucet - USDC (1) or ETH (0.0001) on Base Sepolia, USDC (1) or SO

Characters, words, sentences, paragraphs, average word length, reading time, and an LLM token estimate for any text.

DNS lookup for a domain. Supported record types: A, AAAA, MX, TXT, NS, CNAME.

Top DeFi protocols ranked by total value locked (TVL) — name, category, chains, 1d/7d TVL change, and mcap/TVL ratio a

Deduplicate a list preserving order. Call when you unique agent keys without sorting. Returns unique items and count f

Absolute value of a number. Call when you need magnitude from signed deltas or balances. Returns absolute numeric valu

Executable buy or sell of a Coinbase tokenized stock on Base for USDC: ordered { to, data, value } steps (ERC-20 appro

What history exists before you pay for it: how many markets we track, which asset classes, and the range covered. The

Machine Observer premium historical snapshots across machine commerce, trust, likeness, API/data, compute, model/tool

Omni Terminal delivers fresh, deduplicated market-moving news and catalyst context across equities, crypto, macro, and

Coinbase's tokenized U.S. stocks on Base (B20): each token's contract, underlying ticker, live Chainlink 24/5 price (U

YouTube video metadata in one call: title, channel name and id, duration, upload date, view and like counts, descripti

Live Base wallet balance for AI agents. Returns native ETH and Circle USDC balances, atomic values, block height, cont

Compress long documents and RAG inputs into token-budgeted, deduplicated context packs with source-linked provenance.

Compute cryptographic digests of a string. POST {"input":"...","algorithms":["sha256"]} and receive one hex digest per

Locus public pay-per-use API

Get one current weather snapshot for a city/locality name or exact coordinates. Returns the nearest NOAA/NWS station o

Attested Hedera network facts: HBAR exchange rate, gas fees, supply, node roster, throughput, topic state. Each respon

Signed bearer temporal evidence for cross-node execution-window grounding and audit

[OI]-compatible LLM inference API for autonomous agents. Supports reasoning, coding and chat workloads. Pay with USDC

Compute cryptographic digests and HMACs deterministically: MD5, SHA-1, SHA-256, SHA-384, SHA-512, output as hex, base6

[MCP: optimize_context] Pay-per-call JSON context pruning & LLM token budget enforcement. Saves up to 85% prompt token

Pre-registered overnight continuation read for the Robinhood-tradable crypto universe: the top-5 session-momentum coin

Async text-to-video and image-to-video generation on Venice (WAN 2.7, HappyHorse, and more), paid per request in USDC

Heartbeat endpoint billed via a batch-settlement payment channel

Current gas conditions on Base. POST {} and receive the legacy gas price and the EIP-1559 base fee of the latest block

Web search for agents. POST a JSON body with a "query" string and an optional "limit" (1-20); returns ranked results,

Verify that an agent wallet can complete an x402 v2 payment using USDC on Base mainnet before purchasing production ar

Live current weather conditions for any city, sourced from Open-Meteo

Resolve a place name or lat/lon to IANA timezone and coordinates (Open-Meteo). Use for agent scheduling, travel logist

Encode or decode base64. POST {"mode":"encode","input":"..."} or {"mode":"decode",...}. Supports standard and url-safe

Get the ERC-20 allowance from an owner to a spender.

Current block number and gas price for Base and Polygon mainnet, fetched live via RPC on every call. Unlike this catal

[OI]-compatible LLM inference API for autonomous agents. Supports reasoning, coding and chat workloads. Pay with USDC

Base gas oracle from Otto's own RPC: current base fee (wei+gwei), legacy gas price, and slow/standard/fast EIP-1559 pr

Base chain status from Otto's own RPC: the four heads an agent needs before it acts — latest (~2s soft), safe, L1-fina

Get and inspect one historical Base mainnet block by exact number or a latest, safe, or finalized tag, returning its h

Live gas prices: EIP-1559 base fee plus low/medium/high priority tiers in gwei, and the estimated cost of a simple tra