the402 x402 endpoint directory

Header-level detail for one block on Ethereum, Base, Polygon, Arbitrum, or Optimism: hash, timestamp (unix + ISO), tra

Validate an A2A (Agent2Agent protocol) Agent Card: required fields, skill shape, transport names, capability flags - s

Chainlink For Agents: update agent registration (ToS / execution mode). Onboarding: GET /v1/skills, GET /v1/terms-of-s

Check your credit balance. Credits are the unit of account for the tollbooth, escrow, and bounty markets here: 1 credi

Batch text-to-speech: synthesize up to 20 separate text items in a single call, standard voices only, up to 500 total

Full DeFi signal bundle: Hyperliquid funding extremes, HL–Bitget funding spreads, DEX arb edges, and recent Aave liqui

Real-time weather data API — $0.002/call, trustScore 92. Built and tested on 01Mind's Tool Generation Engine, with eve

Validate an EU VAT number against the official VIES registry before invoicing, onboarding or a reverse charge. Per-cou

robots.txt and AI crawler policy check. Tells an agent whether a website permits crawling and whether it blocks AI bot

Pre-flight check before a swap or transfer: ERC-20 allowance, balance, decimals and symbol in one call, read live from

Get real-time spot price and market data for a cryptocurrency

BitBooth PII Redact: pay 0.002 USDC, strip emails, phones, SSNs, credit cards, IPv4 addresses, and hex-looking secrets

Validate a credit card or payment card number and detect its brand. Checks the Luhn checksum and identifies Visa, Mast

Validate an IBAN and check whether a bank account number is valid. Verifies the ISO 13616 MOD-97 checksum, structure a

Is this counterparty safe to pay? Screens the address against the OFAC sanctions list, reads its ERC-8004 reputation w

LLM inference pay-per-call, no account: prompt in, completion out (fast frontier-lab mini model, up to 2000 output tok

Korean corporate disclosure (DART) event stream, cursor-based delta. All filings, classified with importance score.

Reloadpi — Browse eSIM data plans for international travel across 190+ countries

Reloadpi — Search prepaid mobile top-up and airtime offers for 150+ countries worldwide

Reloadpi — Search gift cards and vouchers from 5000+ brands across 150+ countries

Find funding rate arbitrage opportunities -- coins with extreme positive or negative rates

Historical funding rate data for a specific Hyperliquid coin

Read-only Base L2 gas conditions computed directly from chain data: current base fee, recent percentiles, realised vol

Hash a string or bytes with multiple algorithms in one call: SHA-1, SHA-256, SHA-384, SHA-512, SHA3-256, and keccak-25

Convert an array of JSON objects into CSV — column union across rows or explicit column order; nested values are JSON-

Validate identifiers by checksum: IBAN (mod-97), card numbers (Luhn), EAN-13, ISBN-10/13, UUID (RFC-4122), ULID. Batch

Decode a JWT — header, payload, and timing analysis (issued/not-before/expiry as ISO timestamps, expired flag, seconds

Compare two texts — unified diff patch plus added/removed/unchanged counts, by lines, words, or characters. Verify edi

Company name search across jurisdictions. jurisdiction=lei searches the global GLEIF LEI database (all countries); jur

Test and debug a regular expression against up to 50 sample strings — real match results, capture groups, named groups

Validate JSON data against a JSON Schema (draft-07, 2019-09, 2020-12) — returns exact error locations, keywords, and m

Market-silence score 0-1 — a composite of low volume, low volatility and small price change. High silence often preced

Realized volatility for an asset: daily and annualized %, plus a low/normal/high/extreme bucket and the 24h high/low/r

Current BTC market regime — BULLISH / BEARISH / NEUTRAL — derived from price vs its 20-period EMA on the 12h candle, w

Whole-market snapshot: total crypto market cap, total 24h volume, BTC dominance, and counts of active coins and market

Fear & Greed now vs yesterday, 7 days and 30 days ago — with the deltas — so an agent can see whether market sentiment

How much of today's expected (ATR) range has already been used — low/moderate/high/extended — with the % consumed. Use

USDT/USDC premium on Korean exchanges vs official USD/KRW rate — fund flow indicator

Phone number static intelligence: E.164 normalization, format validity, NANP plausibility checks, geography, timezones

NANP area code lookup: region, state, country, timezones, current local time, toll-free/premium/geographic flags. Stat

GlianaAI - pay-per-call AI + utility APIs (80+ models incl. LLM chat), no signup, USDC. This resource: tools/rpc. http

Color conversion: hex or rgb() input to hex, RGB, HSL, approximate relative luminance and best text contrast (black/wh

IPv4 CIDR calculator: network, broadcast, netmask, wildcard, usable host range and count, plus optional contains-IP me

User-agent string parsing: browser, engine, OS, device type/vendor/model, CPU architecture, plus a likely-bot flag. Fo

ISBN validation: ISBN-10 and ISBN-13 check digits, with automatic ISBN-10 to ISBN-13 conversion for valid inputs.

GTIN / EAN / UPC barcode check-digit validation (GS1 mod-10) for GTIN-8/12/13/14 with type identification.

Daily EUR foreign-exchange reference rates (source: European Central Bank). Returns the latest ECB reference rate for

Add N Japanese business days to a date, skipping weekends and public holidays, and return the resulting date. Useful f

Count Japanese business days in a date range, inclusive of both endpoints, excluding weekends and public holidays. Use

List every Japanese public holiday in a given year, with each date and its official Japanese name. Useful for building