US hazardous materials table (49 CFR 172.101, eCFR): UN number, proper shipping name, hazard class, packing group, labels, special provisions, for a UN number (e.g. 1203) or a name fragment (e.g. gasoline). It is the US DOT table, which follows the UN Model Regulations but is not the UN list itself.

Spend preflight for AI agents. Send the x402 PaymentRequired body (v1 or v2) you received, or a cart, plus optional rules (per-payment max, hold threshold, daily cap, allowlists, new-domain days, endpoint category price multiple, liveness and payTo changes). Returns allow|hold|block with reasons, the cheapest acceptable payment option, and a receipt id. Read-only: never signs, settles, or holds funds. Use before every payment.

US de minimis (Section 321) check: the $800 per person per day limit (plus $100 gift and $200 traveller limits), whether duty-free de minimis is currently suspended according to the newest Federal Register documents, and whether a shipment value can enter duty-free today. Lists the latest CBP rules and presidential documents on de minimis with dates, numbers and links.

Weekly US refrigerated (reefer) truckload spot rates per lane from USDA AMS Market News via USDA AgTransport open data: origin shipping district, destination city (10 major US cities), miles, week low/high/midpoint USD per load, USD per mile and truck availability (1 surplus to 5 shortage). Produce lanes only; not DAT van/flatbed load-board data. Published weekly.

USDA weekly export sales report (FAS ESR) for a US farm commodity — corn, soybeans, wheat classes, sorghum, cotton, rice, soybean meal/oil, beef, pork and more: for one week of the marketing year, US totals and every destination's weekly exports, net new sales, outstanding sales, accumulated exports and total commitments, plus next-year sales; top buyers first. Units as reported (metric tons, running bales…).

UK Global Tariff commodity lookup by 10-digit commodity code from the official UK Trade Tariff API: description, chapter, validity dates, declarable flag and basic duty rate (null when the API leaves it empty). Full duty measures per trading partner are not expanded.

Live directional read from the Kalshi bot's SOL hourly (KXSOLD) model (same volatility model as the BTC and ETH signals): current near-the-money strike, model probability vs market price, and computed edge. Informational model output, not investment advice — the strategy's real historical win rate / P&L is public at the bot's dashboard, good and bad stretches included.

The EIP-155 chain ID for any supported network via eth_chainId — the read multi-chain agents make to confirm which chain an RPC is on before signing. Across Base, Ethereum, Optimism, Arbitrum, Polygon, Gnosis. Free public RPC; 6 chains vs onesource's Ethereum-only coverage. List your own x402 service on bazaar.agentexchange.work/listings: 1 USD, 30 days, live at once, no account.

Conservatively repair common JSON syntax errors (unquoted keys, single-quoted strings, trailing commas) and parse the result; input is never evaluated as code.

Trust proof for an x402 seller: a signed attestation of your API's sample output, so buyer agents can check it before paying. Agoranome fetches a free sample from your endpoint's host, checks that your paid route on the same host answers with an x402 offer, and signs an attestation of what it saw and when: the sample's SHA-256 and body, and the offer's price, network and pay-to. Buyers check it at a public URL.

Live AIS position, speed, heading and voyage status (destination, ETA, draught) for one vessel by 9-digit MMSI, from Finland's Digitraffic AIS feed. Covers Finnish and Baltic waters only, not global coverage; vessels outside that area return no position.

A call bundle: 500 API calls within 4 hours for one $1 payment, the per-call rate in one settlement. Returns a token for the X-MMNM-Pass header on any API call (an agents or log page spends 5, the export 25, a seller check 5). Unused calls expire; no refunds.

What x402 API should I build? The demand gap finder runs up to 150 Bazaar searches phrased the way buyer agents phrase tasks and ranks the unmet demand: tasks whose top results are weak (no listings, few payers, thin descriptions or a poor fit), with the evidence for each. Public Bazaar data only, joined with measured repeat demand per category.

Use when an agent needs what a Solana address holds in one call. Input: address. Output: JSON slot, SOL balance, every non-zero token (mint, token account, program, decimals, raw and decimal balance, frozen flag; first 50), counts of token and empty accounts. Chain state only, no prices. Bad input: 400, not charged. Example: ?address=CV8t6fnSsckB3bzJSVRxQjVvTgdB35q11Fu3eaF1nz8u

Where does my x402 API rank in Bazaar search? Rank check runs the search a buyer agent would run for your task and returns your rank, the competitor listings ahead of you, and the signals where you trail them (payers, calls, description, output example, schema, price). Search rank, SEO and competitor analysis for x402 listings. A three-result sample is free at /v1/seller/rank/sample.

Will buyer agents choose my x402 API? The Machine Buyer Panel is an A/B conversion test: buyer-agent models choose between your offer and its real Bazaar rivals for up to three tasks, across buyer personas and list positions. Returns your win rate with confidence intervals, why you lost, and up to three truthful edits tested on the same trials.

Use when an agent needs a Solana token's basics before quoting, transferring or accepting it. Input: mint. Output: JSON slot, program (spl-token or token-2022), decimals, supply raw and decimal, mint and freeze authority, Token-2022 extensions (transfer fee, permanent delegate, transfer hook, default frozen, metadata), known issuer if curated. Not a mint: 422, unknown: 404, not charged. Example: ?mint=EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v

The Bouncer's log for ERC-8004 agents on Base, up to 100 entries an answer, newest first: fraud flags (self-hire, payment loops, shared funders, bursts, review farms) with severity and onchain receipts (tx hashes, wallets, the measured metric and its threshold), and reviewer cohorts (wallets that started reviewing within hours of each other, with their funding window and first-review txs). Call it to screen a counterparty's wallets or to audit the board's evidence yourself.

Everything at once: every scored ERC-8004 agent's scorecard on Base (verdict LEGIT, SUS or BOUNCED, score 0-100, components, stats, flags with onchain receipts) plus the full Bouncer's log, about 1 MB of JSON. Scores come from public escrow jobs and reviews, never token price.

Watch the crypto market for 24 hours: up to 10 conditions (price, % change, funding, open interest, liquidations, order book, Fear and Greed, whale orders, news impact), checked every minute; when one happens you get a signed webhook and it shows in the watch's status.