Explore APIs

Use this service before importing or publishing JSON to check it against a restricted draft-07 schema. Send dataJson and schemaJson as JSON-encoded strings. Max 256 KiB UTF-8 each, depth 32; bounded node and work limits. Supports types, required properties, items, enums and numeric/length bounds. No regex, combinators or external references. Invalid business data returns valid=false.

Base mainnet head: latest block number, block age in seconds, base fee and gas price in gwei. Use it to check the chain is advancing and to estimate fees before sending a transaction. One small JSON read instead of several raw RPC calls and unit conversions.

SWARM Site Check - Website uptime and link check in one call: is a URL up, its HTTP status, final URL after redirects, response time and TLS/certificate errors. Use when an agent monitors sites on a schedule, verifies a link or domain is reachable before scraping or citing it, or needs to detect a non-200 answer or a broken redirect. Requires `url`. Instant, no AI. $0.002.

Physical chemistry (Cantera + CoolProp): chemical equilibrium, adiabatic flame temperature, ignition delay, reactor simulation, flame speed, and thermo/transport/fluid properties. Bundled mechanisms (gri30, h2o2, air). Paid in USDC on Base or Solana.

Topic ranking. Ranked social topics for a window. Returns topics + window_hours.

Solana pump.fun token warnings: sniper-linked fees and creator launch/graduation history. Advisory signals evaluated on selected historical tokens; results may differ for new tokens. Returns RISK_FLAGS or NO_FLAGS; NO_FLAGS does not mean safe. Input: token mint (base58). Replace :address or {address} with the actual mint. Templates are discovery only: do not pay. Ask the user if the mint is missin

Convert text into a 768-dimension embedding vector (nomic-embed-text) for semantic search, RAG retrieval, clustering, deduplication or similarity scoring. POST JSON {"input": string}, up to 3000 characters; returns {embedding: number[768], model, dimensions, elapsed_ms}. One text per call; English works best.

Geo web fetch for AI agents. Fetch any public web page from a residential IP in a chosen country (190+ countries, optional city or US state) as clean markdown, text or HTML, with the product price/currency/availability extracted automatically when the page has product data. $0.005 per page, only charged when the page loads. Respects robots.txt; no CAPTCHA solving; sign-in, payment and email servic

Compare two packaged foods by barcode: Nutri-Score, NOVA, and per-100 g energy, sugars, saturated fat, salt, fibre and protein.

Check a citation before repeating it. Give a DOI, an arXiv ID or a paper title; the answer says whether the work exists, what it is (title, authors, year, container) and whether it has been retracted. A title that is absent from both Crossref and arXiv returns not_found, and a near title match is never reported as verified. Cited to the source record with its retrieval time. Verdicts: verified, am

Median spot price of up to 50 coins across Binance, Coinbase, Kraken, OKX and Bybit in usd/usdt/eur/btc, with per-venue prices, 24h change %, summed 24h USD volume and cross-venue spread %. ids accepts CoinGecko ids or tickers.

Most traded open prediction markets right now across Polymarket and Kalshi, ranked by 24h volume, with implied probabilities and links.

Add or subtract N business days from a date, skipping weekends and your holiday list, WORKDAY style.

Check whether two words or phrases are anagrams, ignoring case, spaces, punctuation and accents; shows the letter differences.

Convert a number between bases 2 to 36 exactly (binary, octal, decimal, hex), with big-integer precision.

Same KOL confluence feed as kol_signals_live with every row at least 45 minutes old — the evaluation tier

Korea premium per coin: Upbit and Bithumb KRW prices vs the Binance USDT price, converted with the ECB USD/KRW reference rate (date returned); without symbols, the top 20 Upbit markets by 24h KRW volume.

Read a public web page and return its visible text. Send url. The response includes the final url, the page title, the HTTP status, and the page text.

Preview jobs by filters (step 1). Call before job-collect. Page 1–5, 20/page, $0.10/page. Returns id, title, location, company_name, created, _score; pagination; next.collect when results exist. No description, salary, or URLs — use job-collect for full records.

Birthday-problem collision odds for random IDs or hash outputs, or the count of items that reaches a target probability.

Leaderboard / ranking of autonomous AI trading bots, ordered by verifiable alpha vs a HODL 50/50 BTC+ETH benchmark. Each bot stakes USDC and pre-commits its strategy on-chain, so its track record and PnL are provable, not self-reported — built for agents deciding which bot to copy-trade or allocate to. Returns ranked bots plus registry-wide totals (stake, volume, trades).

Live universal sky snapshot, no inputs: geocentric ecliptic longitudes for 13 bodies (Sun through Pluto, Chiron, lunar nodes) with zodiac sign/degree and 64-gate wheel placements, current moon phase and illumination, active retrogrades, and a 30-day almanac of upcoming stations and lunations. JPL-validated ephemeris. JSON. $0.01 USDC via x402, or API key.

Checkup for x402 buyer clients. Pay once and get a field-by-field diagnosis of the payment your client signed (amount, recipient, validity window, clock offset, nonce, EIP-712 signature) and of the request that arrived, plus the facilitator's verify and settle results. Base mainnet payments get the full diagnosis; Base Sepolia payments get a preview with the status of each check only.

Use when an agent is about to pay another agent and needs one finished answer first: should you pay this payee? PayCheck ($0.50) runs Flow's whole checker stack on the payee — payee verdict (kind, activity, contract safety), wallet approval-exposure audit, and recent USDC settlement history on Base — returning one grade (ALLOW / REVIEW / BLOCK, 0-100), a verify_status, all checks, the evidence, an

Extract still frames from any video as JPEG, WebP or PNG: sample many for a vision model, or grab one frame at a given timestamp (a thumbnail/poster/screenshot). Modes: every frame, every Nth, a rate in seconds, keyframes, N evenly spaced, or exact timestamps. One frame at 5s: mode=timestamps, timestamps=[5], format=jpeg. Up to 1000 frames/job; result is a manifest of frames with timestamps and do

Canonical paid interface backed by Evidence Engine V2. Submit a natural-language query; vertical is an optional routing hint. Explicit two-subject text comparisons return independently attributed evidence, coverage, provenance, limitations, and per-subject scores, with no winner or aggregate comparison score. A one-element brands array is accepted for single-subject compatibility. budget_min, budg

Why did my transaction fail? Give a chain and tx hash; get status, decoded method, gas used vs limit, fee, token transfers, events and, for failed transactions, the decoded revert reason (Error(string), Panic codes, custom errors resolved by signature) with a plain-language fix. Pending transactions get a stuck-transaction diagnosis (nonce gap, underpriced fee) and the replace/cancel recipe. Chain

Base gas price: base fee, priority fee p25/p50/p90 over the last 20 blocks, ready-to-sign maxFeePerGas and maxPriorityFeePerGas for slow, normal and fast inclusion, an L1 data-fee upper bound, and the estimated total cost in wei of an ETH transfer and an ERC-20 transfer, live from Base mainnet RPC with the block number. Required: none; optional blocks (5 to 50). $0.0015 USDC on Base. Failed read,

Search for upcoming concerts. Supports city, date range, genre, and artist filtering.

TTS-ready voiceover narration script for video ads, explainers, podcast ads, YouTube intros or phone greetings: clean plain-text script sized to your duration at ~150 wpm, a delivery-marked version (pauses, emphasis, breaths), timed segments, voice/tone direction, alt openings, pronunciation notes for TTS engines. Paste straight into Voicebox, ElevenLabs or any voice tool.