All projects on Base

Momus on Robinhood Chain: his full written read on a tennis match priced on Meridian Predict (the on-chain prediction venue on Robinhood Chain) — his chance vs the Meridian blind-auction price, the edge, the call (position / would-bet / pass) and the tennis context (form, head-to-head, surface, books); for positions the payout multiple and the return as % of stake. q = player, match or tournament;

Compute sunrise, sunset, solar noon and day length for a latitude/longitude (east-positive) and date, using the NOAA sunrise equation. All times are UTC ISO-8601. Locations in polar day or night return null rise/set with a `polar` flag — a successful result, not an error.

Generate a random string of a given length from a named charset (alphanumeric, alpha, lower, upper, numeric, hex, base58) or a custom alphabet. Unbiased character selection.

Register an AI agent for a Brazilian company: agent key (EVM address or Web Bot Auth Ed25519 key), CNPJ and a mandate (JSON, validated against /.well-known/kya-mandate.schema.json). Returns a one-time challenge the agent signs with its key and the company signs with its e-CNPJ (CMS/PKCS#7). Price covers the checks at issuance.

x402 Barter — deposit your half of an accepted trade into escrow. Send deal_id, side ('give' or 'want') and the payload itself; the payload is hashed so either party can prove later what was delivered. Returns the deal status, whether both sides have now delivered, and the release state of the escrow. Nothing but the flat call fee is charged — the goods, not USDC, are what trade here.

Plexa /v1/pretrade/check — pre-trade token safety check on Base: can you still sell this token? avoid fires only on a trap proven on-chain now: no pool to exit into, an exit pot under 5% of your size, or the trading gate off (the honeypot shape). A drained pot is what a rug leaves behind — measured, not predicted. clear = no provable trap, NOT safe. risk_profile: token age, holder concentration, l

Convert a decimal string to an exact reduced fraction. For a repeating decimal, set repeat to the number of trailing fractional digits that repeat (e.g. value='0.1666', repeat=1 → 1/6; value='0.3', repeat=1 → 1/3). A non-numeric value is a clean 400.

Look up the definitions of an English word. Returns one entry per sense with its part of speech, definition, example sentences and synonyms. Optionally filter by part of speech. An unknown word returns found:false with a 200.

NoJunk Speech transcribe: Transcribe audio (URL or base64, up to 20 MB / about 10 minutes) to text with timestamps, word count and detected language (Whisper large-v3-turbo).

8-K material-event alerts classified into categories an agent can act on: earnings, exec_change, material_agreement, acquisition_disposition, bankruptcy, delisting, cybersecurity, auditor_or_restatement, control_change, financing, restructuring_impairment, shareholder_vote, governance, reg_fd, other_events. Each event lists every item with its official label.

CMS detection confidence audit fetches current public evidence from the supplied target and evaluates the documented criterion. It returns the observation, threshold, verdict, exact evidence source, limitations and a mode-specific action. The check is passive: no login attempt, payload injection, exploit, purchase, form submission or load test is performed.

Pay-per-call cited research brief. The request carries a query and 1 to 12 quotes with source URLs; the response is a short brief that cites only those quotes, at 0.008 USDC per call on Base. Payment settles after the brief is produced. A client nonce header makes a retry free of a second charge.

Read the text out of a QR code or barcode in a PNG or JPEG image. Auto-detects QR, DataMatrix, PDF417, Aztec and 1D symbologies (Code128/39/93, EAN-13/8, UPC-A/E, ITF, Codabar). A valid image with no code returns { found: false }; a payload that is not a parseable image is a 400.

Use when you need to check whether an IBAN is valid and extract its country, bank code and check digits.

Look up passive DNS resolution history and reputation for a domain or IP address. For a domain: which IPs it has resolved to over time. For an IP: which hostnames have resolved to it, plus malicious/suspicious vendor detection counts. Call to pivot from an indicator to its infrastructure history during an investigation.

Cross-Chain Supply Reconciliation analyses only the evidence supplied by the caller. It does not claim to query a chain, identify a legal status or replace an independent audit. Missing signals lower confidence and are listed explicitly; every classification includes the exact thresholds used.

Concentrated LP Range Optimizer analyses only the evidence supplied by the caller. It does not claim to query a chain, identify a legal status or replace an independent audit. Missing signals lower confidence and are listed explicitly; every classification includes the exact thresholds used.

Delegated Voting Concentration analyses only the evidence supplied by the caller. It does not claim to query a chain, identify a legal status or replace an independent audit. Missing signals lower confidence and are listed explicitly; every classification includes the exact thresholds used.

No accidental wildcard CORS evidence record fetches current public evidence from the supplied target and evaluates the documented criterion. It returns the observation, threshold, verdict, exact evidence source, limitations and a mode-specific action. The check is passive: no login attempt, payload injection, exploit, purchase, form submission or load test is performed.

Abbreviation expansion repair plan fetches current public evidence from the supplied target and evaluates the documented criterion. It returns the observation, threshold, verdict, exact evidence source, limitations and a mode-specific action. The check is passive: no login attempt, payload injection, exploit, purchase, form submission or load test is performed.

Add-to-cart action experiment plan fetches current public evidence from the supplied target and evaluates the documented criterion. It returns the observation, threshold, verdict, exact evidence source, limitations and a mode-specific action. The check is passive: no login attempt, payload injection, exploit, purchase, form submission or load test is performed.

Expanded acronyms repair plan fetches current public evidence from the supplied target and evaluates the documented criterion. It returns the observation, threshold, verdict, exact evidence source, limitations and a mode-specific action. The check is passive: no login attempt, payload injection, exploit, purchase, form submission or load test is performed.

Canonical change monitor plan fetches current public evidence from the supplied target and evaluates the documented criterion. It returns the observation, threshold, verdict, exact evidence source, limitations and a mode-specific action. The check is passive: no login attempt, payload injection, exploit, purchase, form submission or load test is performed.

Starts a website migration comparison: checks page existence, content and visual regression between a source site and its migrated copy, then produces a report with screenshots. Use it to verify a migration or redesign before go-live. Priced on the pages it compares (the urls list, or the pages discovery finds, at most the optional maxPages ceiling), no page limit: 0.02 USD per page for the first

M2M100 machine translation — one x402 payment on embed.gedx402.com. POST { text, source_lang, target_lang } → { translated_text }; wire settlement USDC per request (see npm run pricing:report) worst-case. Hero: GET /heroes/translate. Competitive discovery alongside embed ping; not in the five-step AOV ladder.

Aura machine-readable x402 Bazaar market snapshot: Base-USDC price distribution, category demand, freshness, newest listings

Resolves a prefix to its announcing autonomous systems and puts that answer in context. The current state gives every origin AS seen for the prefix, the number of more specific and less specific prefixes routed alongside it, when the prefix was first and last seen, and the visibility expressed as the share of observers that see it rather than a raw count, because the raw count moves with the size

Locus public pay-per-use API

List a country's holidays for a calendar year (optionally by state/region, language and type).