Explore APIs

LLM chat completion per call — no account, no API key, no token math. Three flat-priced tiers: fast $0.002 (DeepSeek v4 Flash), smart $0.02 (GPT-5.4 mini), reasoning $0.03 (DeepSeek v4 Pro). Send OpenAI-style messages, get the assistant reply with finish_reason and token usage. Input capped per tier (16k-32k chars); the 402 quotes the exact tier price up front. Model or source unavailable means a

Text-to-speech synthesis in 1 of 10 standard voices (5 male M1-M5, 5 female F1-F5) across 31 languages, up to 500 characters, returned as inline WAV audio. Use it to: give an agent a spoken reply, read an alert aloud, narrate a short UI prompt, add voice to a chatbot response, speak a confirmation message. Cheapest tier. USDC on Base via x402, no API key, no signup.

Pin a file to IPFS

Recent news headlines for any company, topic or query: deduplicated titles with source, link and publish date from a broad news index. Window configurable 1-30 days. JSON response. $0.01 USDC per call, pay via x402, no API key.

DNS lookup (A, AAAA, CNAME, MX, TXT, NS, SOA, CAA): Live DNS lookup for any public host name: one record type or ALL (A, AAAA, CNAME, MX, TXT, NS, SOA, CAA) in one call, with NXDOMAIN detection and a flag for private addresses. Cached 2 min. ~0.1-1 s.

Complete weather bundle in one call: current conditions (temperature, feels-like, humidity, wind speed/direction/gusts, pressure, cloud cover, precipitation, UV, day/night) plus 24-hour hourly and 7-day daily forecast, air quality (AQI, PM2.5, PM10, ozone), solar radiation, and severe-weather alerts. Query by city name or lat/lon. Times in the location local timezone. Most complete weather data pe

Latest SEC EDGAR filings for any US-listed company by stock ticker or CIK: 10-K annual reports, 10-Q quarterly reports, and 8-K material events. Resolves ticker to CIK via SEC's official index and returns the parsed filing (company, form type, dated items). Sourced live from data.sec.gov.

What a wallet spent on x402 APIs on Base in the last days, read from the chain: total, per seller (named by the Bazaar listings that pay to it), per day, and the recent payments, with other USDC transfers counted apart. For a wallet with very many payments, complete is false and from says how far back it was read.

Seedance 1.5 pro: 12s at 720p

Crypto token price in USD, EUR and more — real-time spot prices for one or many coins by CoinGecko id (bitcoin, ethereum, solana).

Curated Bitcoin coinbase scriptSig messages (printable ASCII only). Pool tags, BIP-comment campaigns, political statements. Window up to 7d.

Crypto ETF Sentinel — Latest POS AM-extracted operational profile for one US spot crypto ETF issuer: custodian, sponsor fee, AP counts, in-kind eligibility, basket size. Use when you need one fund's current plumbing terms. Pass the issuer's SEC CIK as cik.

Spot Check. REQUIRES ?host= on the paid request — a signed request without it is refused before the gate and no money moves. Name a host and get what this observatory already holds on it, signed: corpus rounds and verdicts as recorded, when we last actually knocked, our coverage of the window since we met it, and the gaps with their reasons. Read from the books at the counter — no request is made

Smart Contract Audit — Security review of a single contract

x402 seller due diligence: everything in x402-preflight PLUS on-chain proof of real demand (USDC actually received by the seller's payTo in the last 24h: payments, distinct payers, volume) and a Bazaar listing-truth audit (is this URL listed, does the listed price match what it charges). Reveals dead, fake or mispriced sellers before payment.

News Gurus Intel API — US equity + crypto market regime now: TRENDING, MEAN_REVERTING or VOL_EXPANSION with confidence. Example: {regime: TRENDING, confidence: 0.74, reason: 'ADX 31 + VIX compression', vix_spot: 14.2, adx: 31}. Derived by a 40-source trading bot, refreshed intraday. Cheapest first call on this API and the standard 'trend day or chop day' check before sizing any trade. Educational

Phone number intelligence for agents: pass any number and get back whether it is a valid E.164 number, its country, the carrier that holds it, and the line type — mobile, landline, or VoIP. One paid call, no account, no API key. Decide whether a number is worth calling or texting, or flag a VoIP number before you trust it. Free-format numbers are normalized; a syntactically bad number is rejected

Keyless web search for agents: pass a query, get a concise web-grounded answer plus the top source results (title, URL, snippet). Live web access, no API key or account needed. JSON response. $0.008 USDC per call, pay via x402, no API key.

Resolves an address into its ENS reverse record on a given chain, with batch support up to 50 addresses and per-address chain scoping via interop addresses.

Access to api/v2/addresses/:address_hash/token-transfers. List token transfers involving a specific address with filtering options

Together AI pricing table: per-token cost of every AI model Together AI serves, in one call — input, output, cache and batch USD per 1M tokens, ranked cheapest first, with context window and capability flags joined in. Compare LLM token cost inside Together AI and against other providers hosting the same model. Normalized from public sources, cross-checked, refreshed hourly.

Use it before you send to an address, or to screen sign-ups and leads for typos, disposable domains and role addresses. Checks syntax, MX records (with the A-record fallback), null MX, a list of about 120,000 disposable domains, role addresses (info@, support@…) and free providers, without sending anything. No SMTP probing, so it can't confirm the mailbox exists. Never charged for errors: we settl

Forward geocode a free-text address, place name, or city (e.g. "Tokyo, Japan") into geographic coordinates — latitude and longitude — plus its IANA timezone. Use this to convert a location description into coordinates for mapping, distance, or timezone-aware lookups, or as the first step before coordinate-based endpoints like weather forecasts.

Spot USD price for a token/coin (CoinGecko where free tier suffices, else Alchemy). x402-paid.

Wallet balance on Base, Ethereum or Solana: give an address, get its ETH or SOL, USDC, USDT and any tokens you list, read live from the chain.

Entry point to the x402 Carbon Retirement API on Base. Returns every endpoint you need plus a live snapshot of the top 3 carbon classes and marketplace listings by liquidity. Discover, quote and certificate are free. Retiring is paid: each retirement costs the credit price plus a fee, sent from your own wallet (prepare/retire) or relayed from a signed USDC authorization (prepare-auth + POST action

Get the latest market quotes for one or more cryptocurrencies.

Telegram content analytics and data extraction: pull structured entities from a channel's recent posts, links, @mentions, #hashtags, $cashtags, emails, phone numbers and bot commands. Contacts, tickers or outbound links at scale. Formatting-level entities, not semantic NER.

EDINET filing calendar: annual securities reports (yukashoken hokokusho) filed by Japanese listed companies in a date range. Returns company code, EDINET document ID, fiscal period, accounting standard (JGAAP/IFRS/USGAAP) and the exact filing timestamp for each report — track new disclosures, trigger data pipelines, or find which Japanese stocks just reported. Query: /v2/calendar?from=2026-06-20&t

NattSwap cross-chain swap quote (Li.Fi)