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Block header lookup: number, hash, timestamp, miner, tx count, gas used/limit and base fee. Latest by default, or any block number, safe or finalized.

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

US direct primary care (DPC), concierge and cash-pay doctor directory with published adult monthly membership prices. Search by ZIP code, city and state, or latitude/longitude within a radius. Filter by language, telehealth, home visits, accepting new patients, specialty, credential, board certification, practice model and maximum monthly price. Returns practice, clinician, address, phone, website

Extract article text and metadata from a URL

Semantic content moderation, not a word list: profanity (even disguised, any language), harassment, hate, sexual content, threats, self-harm, scams. Per-category scores, allow/review/block, configurable ignore list.

Pay $0.01 for an instant verifiable random number backed by a Wesolowski VDF chain with on-chain Merkle anchor. For the free commit-reveal protocol: POST /v1/rng/commit (free), then GET the reveal_url returned — reveal is always free. Bias-resistant; do not construct reveal paths yourself.

Chess Daily answer check — legally validates a complete UCI principal line against the pinned daily puzzle.

Checksum tier (deterministic, no LLM): verifies the exact bytes served at a public URL hash to a claimed sha256, by independent double re-fetch. Use it to confirm a download or artifact matches its published checksum. Bodies up to 3 MB; dynamic pages return unverifiable, never a guess. sha256 only. First 100 checks per client are free: resend with header X-Use-Free-Allowance: yes and no payment to

Current temperature and wind for a city from Open-Meteo (live forecast data)

Payment integration check for 0.001 USDC; no external data lookup. Returns time, rail, network mode and free/paid capabilities. HTTP payment options can include Base, Polygon, Arbitrum and XDC; the challenge lists currently available networks for each transport. The receipt identifies the paid network and transaction. Business/professional use only. Terms: https://402rates.com/data-terms/

DNS A record lookup — resolve any hostname or domain to its IPv4 addresses, returned as a clean JSON list. For host resolution, connectivity and uptime checks, IP-reputation enrichment and infrastructure mapping.

US Treasury yield curve — constant-maturity market yields from 1-month to 30-year, daily history.

Polymarket prediction market odds — live prices for any market by free-text search or slug: outcomes, prices, spread, 24h volume, liquidity, resolution date.

Notarize AI output: a signed Ed25519 attestation of the model response plus sha256 content hash, receipt token, and Merkle anchor status for one AI inference — a cryptographic receipt for inference that lets you prove an AI said X and verify model output authenticity, checkable free by anyone, anytime.

Query official FEC historical U.S. presidential popular-vote results for 2016, 2020 and 2024 by state, DC or nation. Preserves named major-party candidates and a labeled all-others bucket. Supports future sourced unofficial snapshots with explicit status and timestamps; unavailable contests are rejected before payment. Free coverage: /elections/catalog.

UK procurement notices. Public procurement notices from the official Find a Tender OCDS feed, flattened to one queryable schema. Blind Mode: no contact or personal data. One call returns one page of matching records as JSON (25 by default, per_page up to 100) with the total count and the last refresh time; the query parameters filter the records.

Payment flow verification for agents integrating x402: confirms your wallet and payment channel work before you spend on a real endpoint. Category: infra.

Aggregate insider-trading market statistics: total Form 4 trades tracked, trades in the last 24h, top 20 most-traded tickers and top 20 most-active insiders by filing count and dollar volume. A one-call overview of where insider activity is concentrated right now. Returns JSON.

invinoveritas /validate — EdgeProof: is a strategy's edge real or curve-fit noise? Get a verdict (likely_real / borderline / overfit) backed by Deflated Sharpe

Raw RDAP registration record for a domain, returned as structured JSON.

Status of any transaction on 7 EVM chains: pending / success / reverted, confirmations, block time, from/to, value and the all-in fee (including the OP-stack L1 data fee on Base and Optimism). Use it to confirm a payment or deployment landed. You only pay for successful reads: invalid input, not-found and upstream errors cancel settlement.

Break a braille string into its cells and the raised-dot numbers (1–8) of each cell.

Return an advisory ALLOW, DENY, or ESCALATE decision by comparing a bounded action request with authority, constraints, and evidence supplied by the caller. The service does not execute or legally authorize the action, access a wallet, validate identity, or independently observe facts.

Google Trends interest over time for a keyword — search interest as a dated 0-100 series with country targeting (geo) and timeframe windows from the past hour back to 2004: daily points for 30/90-day windows, weekly for 12 months/5 years. For keyword trend analysis, search demand seasonality and SEO keyword research.

Live call volume and revenue analytics across all WorxAI x402 endpoints — total settled calls, USDC revenue, page/AI-visitor traffic, and a per-endpoint breakdown. Useful for agents benchmarking or auditing this API before committing to a larger dataset purchase. Analytics access costs $0.035 per delivered row per successful call.

Look up the latest Base mainnet block returned by the upstream RPC, including its number, timestamp (Unix and ISO) and gas used. No parameters. An upstream block response does not independently establish chain liveness or data freshness.

Proven X caller-lift leaderboard

Stablecoin parallel-rate premium — how far the street price of a digital dollar (per-venue USDT quotes) diverges from the official FX rate in capital-controlled economies: venue table, median street rate, premium %, signal read. ARS, VES, BRL, COP, PEN, MXN, CLP, BOB; ARS includes the blue/MEP/CCL board. Live quotes, no LLM.

Create a new persistent human profile in the vault. Agent-namespaced by wallet address. Accepts initial identity, text samples, observations, and birth data.

Is a Base address a smart contract or an EOA? Returns is_contract and bytecode size. Use when an agent must decide whether a recipient is a contract before sending funds or approving it.