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OnRamperX is a non-custodial value router for agents and humans: fiat<->crypto and cross-chain via one quote interface (Coinbase Onramp v2, Relay, x402). This endpoint returns the router's live capabilities and rail status; use /api/x402/quote for a ranked route. Settlement centers on USDC on Base.

Carbon-to-nitrogen ratio of a compost mix by the Cornell formula, or the greens-to-browns amounts that reach a target ratio.

Create a temporary public webhook endpoint for AI agents and automated workflows that need to receive asynchronous callbacks from external services. Returns a callback URL plus read and wait endpoints. No server deployment, signup, API key, or subscription required.

Detects the likely real file format from filename, file creation time, file size, and the first 200 bytes of the file. Identifies common formats such as PDF, DOCX, XLSX, CSV, JPG/JPEG, PNG, WEBP, HEIC, TXT, HTML, MP3, WAV, MP4, AVI, MPEG, and WEBM, as well as about 15,000 other file types.

Use before interacting with an unfamiliar Base (chain 8453) address: returns a public-data red-flag snapshot (contract vs EOA, EIP-7702 delegation, source verification, upgradeable proxy, age, activity, ETH/USDC balance, risk level). Pass ?address=0x... Errors: 400 invalid address. Informational only.

MioDio Meridian OFAC SDN screen: exact match of one digital-currency address against public SDN Digital Currency Address entries (~$0.005 USDC Exact on Base). Informational only. Use before interacting with an address to check it against public OFAC SDN digital currency entries. Errors: 400 invalid_address or unsupported_chain, 402 payment required, unexpected 5xx is not charged. MioDio x402 DeFi.

The funnel, honestly, for one seller over the indexed window: settled USDC and purchases, distinct buyers, organic share after self-test exclusion, recurring buyers, buyer half-life and the facilitator mix.

Recent IPs caught probing Polyform's honeypot paths (credential/vuln scanners) — Polyform's own first-party telemetry, not a repackaged public list. Returns up to 500 most-recent scanner IPs with first-seen. For blocklists and threat research. JSON.

Hacker News user profile: karma, account creation date and age, about text (HTML stripped), number of submissions and the 10 most recent submission ids.

Convert Gregorian dates to Hijri (Umm al-Qura calendar) and back. Returns day/month/year, Arabic and English month names, and a formatted Arabic date string. Essential for agents handling Islamic events, Ramadan, Hajj seasons, or Arabic documents.

Government yield at any tenor (e.g. 18M, 7Y, 12Y) for US, EA or MA, linearly interpolated between published points, with 1-month and 1-year-ago values.

Competition check for an x402 idea: sellers, hosts, price range and how many have real buyers. Open space or crowded?

Scan up to 50 open-source packages (ecosystem, name, version) against OSV.dev: advisory ids, summary, severity, CVSS, fixed versions, CVE aliases with CISA KEV and EPSS joined, and a suggested minimum safe version.

Convert an amount between ~50 currencies at the official reference rate (Bank Al-Maghrib for MAD pairs, ECB otherwise, cross via EUR), with rate, date and source.

Decoded METAR and TAF (next 12 h) for up to 10 ICAO stations worldwide: wind, visibility, ceiling, flight category, temperature, weather, raw reports.

ARBITER deterministic semantic control-flow and arbitration: measure and rank a fixed candidate field against current state, intent, or perspective.

Episode 1 of recipients[], an ongoing AI-agent thriller serial: a short text episode (~370 words, markdown). An agent finds its own ID on a payment recipient list before the file even exists. $0.01 USDC on Base. Free teaser at /teaser.

Cross-venue perpetual funding divergence: Hyperliquid against a liquid CEX benchmark (Binance, falling back to OKX where Binance restricts the region), annualised, with the direction of the basis trade.

JIN daily food index series for Japan (excl/incl promo, matched SKU count). Single-store observation, not official CPI, not a forecast. Paid in JPYC.

Notarize an AI agent decision, audit record, or any payload to Base mainnet. Submit SHA-256 hash + metadata; get a tamper-proof verifiable receipt immediately. Merkle proof and on-chain anchor_tx available free after batch (~120s). Use Idempotency-Key to prevent double-charges on retry.

AI and search visibility check for any live URL. Loads the page as Googlebot, Bingbot, OAI-SearchBot, PerplexityBot, GPTBot, ClaudeBot, CCBot and a browser, and flags JSON, empty or blocked pages served to crawlers. Checks robots.txt per bot, sitemap, llms.txt, noindex, text visible without JavaScript, tags, and how many pages Google shows. Returns the top 3 fixes in plain words.

AI chat completions API - pay per request with USDC on Base

Extract structured text, summaries, or metadata from supplied document text or a public HTTPS document URL.

Income tax rates by country, corporate tax, capital gains tax, tax residency rules, crypto tax treatment for any jurisdiction. Worldwide guide giving a full tax overview of any country by scenario. Tax intelligence, not advice.

UK council-tax banding challenge check — neighbor-band cluster analysis against the free official VOA/SAA lookups, statutory route selection (formal proposal vs informal review, England/Wales/Scotland variants incl. the post-2023 Local Taxation Chamber), verified timelines (4/12-month decisions, 3/4-month appeals), evidence rules (the VOA rejects house-price-index data — verified), and the mandato

Signatures, press sheets and blank pages needed for a book of N pages at 4, 8, 16 or 32 pages per signature.

Homebrew formula status: version, license, deprecation or disablement, install counts over 30, 90 and 365 days.

npm package adoption: downloads last week and month, plus trend within the month and a popularity band.

Match a misspelled or branded drug name to RxNorm: best candidates with RxCUI identifiers, names and match scores.

ZenSched `timesheet_status` — Shift-pair timesheet status for a period: complete/open, hours, GPS, approval/lock flags, pending edits. period: YYYY-MM, YYYY-MM-DD:YYYY-MM-DD, current (payroll window), or blank (calendar month). Optional worker_id, worker_ids_json, event_id. level: 0/1/2 vendor approval level (default 0 = approved_0). Pay-per-call $0.01 USDC; the paying wallet owns the org (auto-pr