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Diagnose a failed x402 payment. Returns structured error code, human explanation, and exact fix. Example: /diagnose?error=insufficient_funds&balance=0.003&required=0.01

Search authoritative company registries by company name to resolve candidate legal entities and registration identifiers. Currently supports the United Kingdom (GB) and Norway (NO), with expanding jurisdiction coverage. Results are public-register evidence, not a KYC or KYB compliance determination.

Settlement canary: returns a timestamped pong JSON after USDC micropayment. Use to verify x402 client + wallet + facilitator end-to-end.

Wikidata entity lookup (CC0, keyless). Q-id and/or search → trimmed labels/descriptions/aliases + small claim set.

Spotify — GET /v2/album/detailsAndTracks (v2/Album details & tracks)

Search US federal product recalls (CPSC consumer products, FDA food/drug/device enforcement, NHTSA vehicle campaigns, and USDA FSIS meat/poultry recalls through 2026-10-22) by free-text query, firm name, date range, and source.

Current Base mainnet block height and base fee per gas in wei, read from the chain at request time

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

Cron job scheduler for AI agents: calls your HTTPS endpoint on a cron expression (recurring webhook, scheduled callback, heartbeat, reminder). ENTRY pack: 20 deliveries for $0.02 ($0.001/delivery). Same service, best rate $0.0005/delivery: https://402cron.com/buy/starter. Also 50000 for $25: https://402cron.com/buy/month. Credits never expire. Your endpoint must echo our challenge (no fixed-reply

Nooscape pre-flight check on an AI agent in an on-chain registry (ERC-8004, Solana), a wallet that registers agents, or an endpoint host: dated flags for first seen, ownership changes, revoked ratings and fleet, with sources. No score, no verdict.

Crypto market data bundle: BTC/ETH OHLCV candles (Coinbase) with pre-computed EMA10/EMA30, RSI14 and trend/range/chop regime label per request — one call replaces fetch + indicator math.

Educational briefing on the latest cars in 2026 (powertrains, range, pricing, and what's new).

SCV Approvals: active token approvals of a wallet (unlimited/unknown spender detection) for $0.01 USDC via x402

Audiobook running time from a word count at about 9,300 words per hour (change it), as hours and clock time.

Prediction Market Arbitrage Report for matched Polymarket and Kalshi events.

Trust check for any x402 pay-per-call API URL. Live-probes the target: verifies a valid 402 payment challenge, consistency between the challenge and the /.well-known/x402 manifest, payTo address validity, price sanity, Bazaar listing status, and TLS basics. Returns a GO / CAUTION / STOP verdict with reasons.

Convert between markdown, HTML, plain text, JSON and CSV. Body: { from, to, input }.

Returns historical OHLCV bars for one currency pair between two UTC dates, inclusive, at 1, 5 or 15 minute, 1 or 4 hour, or daily size, paged with limit and offset. Priced by the page size requested, in three tiers: up to 100 bars, up to 500 (the default) and up to 1,000. One request covers at most 31 days of 1-minute bars, 90 of 5-minute, 180 of 15-minute, 365 of hourly, 730 of 4-hour and 5,000 o

Sentiment classification: Verb-path alias of POST /v1/cheap-errand ($0.01 USDC). Same handler + payment terms; path defaults task=sentiment when body.task omitted. Cheap agent glue for buyer-supplied text. Base via x402. No API key.

Returns a short list of transit provider matches (name, ID, transportation modes) for a location and transport type. Use to identify rail, metro, bus, or ferry options before booking.

Carnot limit for a heat engine, refrigerator and heat pump from hot and cold absolute temperatures, with work and heat flows.

List all chains with TVL

Transpose a note by a (possibly negative) number of semitones. Result is spelled chromatically with sharps, or flats when `preferFlats` is true.

Find a person's verified work email from first name, last name and company domain. Live SMTP check against the company's mail server, catch-all detection. Charged only when a mailbox is verified; misses return 4xx and are not charged.

Report the properties of a MAC address encoded in its first octet: unicast vs multicast (I/G bit), universal vs locally-administered (U/L bit), the broadcast address, and — for EUI-48 — the OUI and NIC portions.

Decode a VIN's structure: NHTSA vPIC WMI snapshot, vintage 2026_08: 10659 rows cut in ascending WMI order from 12971 candidates, plus the closed-form rules of 49 CFR 565.15 and 565.25. STRUCTURAL decode only: check-digit verdict, manufacturer, make, vehicle type, country, and model year as a CANDIDATE SET narrowed only for passenger cars. No engine, body, trim, plant or weight class; no claim a ve

Keyless multi-chain JSON-RPC reads, Base + Ethereum, from $0.001 (?chain=ethereum)

Natural remedy lookup for herbalist and wellness agents. Returns evidence-rated traditional remedies and herbs for any condition.

Distribution of latest included product/store observations, with regular and promotional prices separate. Example: category en:pastas, country DE. Cheapest means cheapest included observations, not the whole market.

Federal contract / award search and government spending lookup by keyword, NAICS, agency, or state — real-time USASpending.gov data. Returns top awards with recipient, amount, agency, period, and vendor market intelligence, for business-development and market-intelligence agents.