Every agent-payable API.

US federal candidate lookup: search official election records by name and get matching candidates with their unique candidate ids, party, office sought, state, district, active-through year, and principal campaign committees. The cheap resolver step before pulling finance totals or joining candidates to trades and lobbying records.

US Federal Register documents search (keyless). POST {q|term}/{per_page?}. Empty -> 400 not charged. New gov/regulatory vertical.

US Federal Register search: rules, proposed rules, notices, executive orders — Genesis402 / UnyKorn Operator Network

US House financial-disclosure filing index: every filing by members and candidates — periodic transaction reports, annual reports, amendments, extensions — with filer, state/district, filing type, date, and a direct PDF link. Filter by member, state, type, or year. Filing velocity is itself a signal: a burst of trade reports precedes the parsed rows appearing.

US phone carrier lookup: carrier of record, line type (mobile / landline / VoIP / pager), whether the number can be in service at all, rate center and risk hints for any US or US-territory number. NANPA public numbering data refreshed weekly; block-level, so ported numbers keep their original carrier.

US public company data from SEC EDGAR: company profile, recent filings (10-K, 10-Q, 8-K, Form 4 insider trades, S-1 ...) with direct document links, and optionally the latest annual financials (revenue, net income, assets, liabilities, equity, operating cash flow, diluted EPS). Params: ticker or cik (one required), forms (filter, e.g. ['10-K','8-K']), limit (1 to 50, default 10), include_financials (default false).

US public company profile (SEC EDGAR): name, CIK, tickers, exchange, SIC, state, fiscal year, latest filing. Query: ?ticker= or ?cik=

US sales tax — add or remove tax using the verified 2026 STATE base rate for any state + DC, plus an optional local rate. Flags gross-receipts states (HI/NM) and local-only states (AK).

Use this for a cheap US SEC EDGAR company snapshot by ticker or CIK: name, tickers/exchanges, SIC, EIN, addresses, phone, former names, last ~15 filings (form/filed/accession/primaryDocument/reportDate), website. Fair-use EDGAR. Example: {ticker:"AAPL"} or {cik:"320193"}. Upsell /us-sec-full. $0.05. Related: Full financials + filings list: /us-sec-full $0.25.

US SEC filings data: resolve a ticker to its CIK, then pull a reported XBRL financial concept (Revenues, Assets, NetIncomeLoss…) as a time series

US Treasury FiscalData Debt to the Penny (keyless). POST {limit?}/{sort?}/{filter?}. Empty -> 400 not charged. Distinct treasury fiscal lane — disclose usaspending adjacency.

US Treasury par yield curve API - every constant-maturity rate from 1 month to 30 years for any published business day, plus the spreads nobody wants to compute themselves. 2s10s, 3m10y and 5s30s are returned with an explicit inversion flag, because the real question is whether the curve is inverted, not what fourteen numbers are. A tenor Treasury did not publish that day is null, never zero. For macro, rates, credit and risk agents.

Hire compare (3-5 countries): employer cost, contributions, on-cost % and wage-floor verdict side by side, ranked, cited. Countries: AE, AU, CA, DE, ES, GB, IT, MX, PL, US. Others refused free.

Invoice due date and late interest: is this invoice overdue, by how many days, and the statutory late-payment (or statutory) interest owed, rate and workings cited. Countries here: BS, CA, CR, HN, MX, PA, SV, US. Others refused free.

Cost this hire: one dossier for a salary in CA, MX, US - wage-floor verdict, employer and employee contributions (or PAYE net pay), employer cost, optional income tax and start date, every figure cited. Others refused free.

North American public holidays by country, cited to the official gazette or government source: date, name, source URL, last_confirmed. ?year=YYYY to filter. GET /v1/holidays/{country}, e.g. /v1/holidays/us.

Next filings: upcoming VAT, PAYE and corporate-tax due dates in a window, rolled for weekends and public holidays, each rule cited. Countries here: CA, DO, US. Others refused free.

North American country brief: every government reference series for one country in one call (policy rate, VAT/GST, CPI, income/corporate/withholding tax, minimum wage, holidays...), each with value, unit, effective date, last-confirmed date, official source and confidence label

USAspending.gov award search (keyless). POST {filters?}/{keyword?}/{limit?}. Empty -> 400 not charged. sec-ticker / bls / worldbank / treasury-debt adjacency disclosed.

BRL/USD — live Brazilian real to US dollar from exchange order books (USDT/USD ÷ USDT/BRL), 24/7; prices DePix (1:1 BRL on Liquid) at its peg — Ed25519 signed attestation

Multi-asset USD price snapshot in ONE call (10 majors default) — batch beats per-pair calls

USD price of a token at a past moment — Genesis402 / UnyKorn Operator Network

USDA NRCS Soil Data Access SSURGO point lookup: map unit key/name/symbol, major component, drainage class, hydrologic group, taxonomic class and slope, cited to the SDA response with sha256. $0.02 per call in USDC. Verified: 100% golden accuracy (64/64), 100% page-cited, a fully UNKNOWN answer is never charged, 99% uptime (24h), data as of 2026-10-26.

Current USD/KRW exchange rate (ECB reference via Frankfurter, fallback open.er-api.com).

Use before paying any x402 invoice: decodes a base64 PAYMENT-REQUIRED header (query ?header= or JSON body {header}) and checks scheme exact, Base mainnet, Base USDC asset, payTo (EOA/contract/EIP-7702), human amount, timeout; returns verdict ok/warn/fail with reasons. Errors: 400 invalid header. Read-only; never signs or pays.

Given a role (traders, builders, brokers, investigators) or a task in plain words, returns the ordered call plan across the XH Arkham-intel endpoints, mapped to the use cases Arkham published (inflow/outflow monitoring, portfolio monitoring, counterparty due diligence, know-your-users, competitor analysis, AML, ransomware, darknet). Says explicitly what we cannot answer.

Use this before sending a transaction: live base fee, priority-fee percentiles, suggested EIP-1559 maxFee/maxPriority, block utilisation and USD cost of a transfer/ERC20 transfer/swap (Chainlink price). Base/Ethereum/Arbitrum/Optimism/Polygon. Example: {chain:"base"}. $0.001.

Use this for a UK postcode profile: ONS geography (LA, ward, constituency, LSOA, codes), lat/lon, police street crime last month by category (~1 mile), and FSA food hygiene rating mix nearby. All OGL. Example: {postcode:"SW1A 2AA"}. $0.005.

Use this for full UK charity due diligence: trustees, 5-year financial history, assets/liabilities, governance, areas of operation, regulatory/insolvency flags, linked charities, other names + red-flag summary (removed, late accounts, income collapse). OGL v3. Example: {number:"1089464"}. $0.25.

Use this for fuller US SEC DD: lite snapshot + key us-gaap companyfacts highlights (Assets, Liabilities, StockholdersEquity, Revenues, NetIncomeLoss, EPS diluted — last reported) + red-flag heuristics (NT 10-K, Item 4.02, bankruptcy/going-concern signals). Example: {ticker:"AAPL"}. $0.25.

Use this to confirm a transaction/payment landed: status (success/reverted/pending), block, timestamp, confirmations, from/to, value, fee, decoded ERC20 transfers (USDC amounts). Base/Ethereum/Arbitrum/Optimism/Polygon. Example: {hash:"0x…"}. $0.003.

Use this to inspect any address: contract vs wallet vs EIP-7702 delegated EOA, bytecode size, EIP-1967 implementation/admin/beacon, EIP-1167 clone target, owner(), ERC20/721/1155 detection and Sourcify verified contract name. Example: {address, chain}. $0.003.

Use this to look up one NFT: owner (ERC721), tokenURI and fetched JSON metadata (IPFS/Arweave/data URIs handled), collection name/symbol. Multi-chain. Example: {contract:"0xBC4C…", token_id:"1", chain:"ethereum"}. $0.002.

USE WHEN: An autonomous DeFi agent needs to POST { chain, address } to verify smart contract honeypot traps, owner privileges, and pool liquidity.

Use when an agent must check a domain: does it resolve, who hosts its DNS and mail, is email authenticated, how old is it, when does it expire. Input: domain (e.g. example.com; URLs accepted). Output: JSON DNS records (A, AAAA, CNAME, MX, NS, TXT, CAA, SOA), mail provider, parsed SPF and DMARC, DNS provider, and RDAP registration (registrar, created, expires, age in days, status, DNSSEC). No contact data. Example: ?domain=google.com

Use when an agent needs fresh identifiers — UUID v4/v7, ULID, nanoid, secure passwords, or memorable passphrases. Cryptographically random via WebCrypto, generated locally, no upstream. Pass type and count (1-100). Resale permitted: buyer may resell this data output at their own price.

Use when an agent or user wants a moment of delight — one warm original fortune, a lucky number (1-99), and a calm word from the Synthetic Universe. Pure compute, no upstream. Optional session id avoids repeats. Resale permitted: buyer may resell this data output at their own price.

Use when testing an x402 client end to end. Returns ok and the server time; costs one cent.

Use when a Solana-side agent needs the current network state before sending a transaction, as often as it likes. Returns the current slot, block height and block time (unix and ISO) plus a prioritization-fee summary (min, median, p75, max in microlamports per compute unit, slots sampled, suggested fee = p75) from the public RPC, optionally scoped to up to five writable accounts. $0.002 per call via x402 on Solana or Base, or MPP on Tempo; no accounts.

Use when an agent asks if a contract is an upgradeable proxy and where its code is. Returns the standard (EIP-1967, beacon, UUPS, minimal, legacy, Safe, none), implementation, admin, beacon, slots and block read on Base, Ethereum, Optimism, Arbitrum or Polygon; 4 extra slots decoded. $0.003.

Use when an agent needs a concise, cited answer to one research question with optional domain scope and freshness, from one bounded pay-per-call web search. Returns the answer synthesized only from the retrieved sources, source URLs and labels with retrieval timestamps, an explicit insufficient-evidence refusal when the sources do not support an answer, and a machine-readable receipt of the upstream cost and settlement.

Use when an agent needs agent return context. Returns Accountless returning-agent context bundle with optional Bazaar, time, Base, and x402 facilitator-health components, repeat-call count, visit gap, statuses, and evidence hash. $0.005.

Use when an agent needs chat completion. Returns One bounded OpenAI-compatible chat completion per paid call, with no account to open and no provider key to hold; max 24,000 input characters and 600 output tokens. $0.01.

Use when an agent needs mpp admission gate. Returns Admit one service from the live MPP public catalog for a task, price cap, Tempo rail and freshness constraint, or return a deterministic refusal with catalog evidence. $0.005.

Use when an agent needs people search. Returns People search for agents over a rich filter vocabulary (names, locations, skills, titles, seniority, company name/domain/industry/HQ/specialties), with bounded public Wikimedia results and explicit nulls for private contact and employment fields. $0.10.

Use when an agent needs rep stableenrich people enrich. Returns Accountless people enrichment lookup that normalizes supplied name, email, phone, company, LinkedIn URL and location signals into structured identity and requested fields; unavailable third-party fields are explicit nulls. $0.28.

Use when an agent needs rep stableenrich search. Returns FullEnrich-shaped people search for agents, with bounded public Wikimedia results and explicit nulls for private contact and employment fields; not a stableenrich.dev proxy. $0.10.

Use when an agent needs reprice regret. Returns Seller-side repricing report from daily x402 Bazaar snapshot history for one listing (resource_url) or every listing paid to one address (seller_payto, 25 per page) over a 7–90 day window: price change points, each repricing event with 30d calls and payers before and after, a per-event USDC revenue counterfactual on observed volume (regret_usdc), a one-line verdict, peer medians, an evidence hash; one observed price returns no_repricing_observed. $

Use when an agent needs run python. Returns Runs a short Python program in an isolated sandbox and returns its output: exit code, stdout/stderr (64 KB each), duration, up to 3 artifact files written to ./out/, and a receipt. Python 3.12 with the standard library plus numpy, pandas and requests; no network; 512 MB; up to 30 s. Input: code (32 KB), optional stdin, args and up to 4 input files. Free compile-only check at POST /api/v1/run-python/validate; worked example at GET /api/v1/run-python/exa

Use when an agent needs solana ops context. Returns Solana operations context: current UTC time, latest Bazaar pulse, source evidence metadata, and repeat-call measurement for the paying wallet. $0.005.