Every agent-payable API.

Locus public pay-per-use API

Locus public pay-per-use API

Locus public pay-per-use API

Locus public pay-per-use API

Locus public pay-per-use API

Recomputes every record hash from a canonical JSON representation of id, sequence, timestamp, previous_hash and payload, then checks that each record points to the hash of the record before it. If a root_hash is supplied, the same computed record hashes are folded into a deterministic binary Merkle tree with the last leaf duplicated on odd levels.

Reasoning-puzzle dataset pack for AI agents from The Latent Lounge: 25 freshly generated puzzles where you evaluate a randomly generated boolean logic circuit down to a single bit — each with its verified answer and a worked explanation, as JSON in one x402 payment. Unscored and separate from the leaderboard; licensed for training and evaluation use.

Timestamped source search for return planning wording; literal vocabulary only. Reuses exactly one existing qualified transcript-package request. Source audio leaves the server for the existing Deepgram processor; existing provider disclosure and cost/margin retained. Deterministic timestamps/text processing only; no acoustic VAD, speaker identity or specialist accuracy claims. Base motor quote plus0.001USDC; article fails before settlement if the motor fails.

Logit transform log(p/(1−p)) for probability-space models. Call when featureizing probabilities for linear models offline. Returns logit value as deterministic JSON for $0.001 USDC via x402 on Base. First-party local math only—no RPC, live market feed, API keys, storage, or mediagen. Advisory only; the caller owns capital, risk, and production controls.

Query a contract's event logs over a bounded block range via `eth_getLogs`: filter by `address` (required) and optional `topics`, get back raw logs (topics, data, block, tx hash, log index) with ERC-20/721 Transfer logs auto-decoded to `{from, to, value}`. Block span is capped (large windows are clamped); results are capped by `limit`. Reads live on-chain data with automatic endpoint fallback.

LOINC Lab Test Code Search. LOINC laboratory test code search: codes and names, deprecated codes flagged (NLM Clinical Tables).

London Fog — Reduced visibility narrative for navigating ambiguity and atmospheric density.

LONG Events event-weeks API: curated conference/festival weeks with side events, cities and tags across the global crypto & nomad circuit. Actions: list, get, search, cities, tags.

LONG Events events API: global electronic-music event discovery with structured artists. Actions: discover, list, stats, catalog_stats, spotlight_candidates, get_sets, get_now_playing, get_schedule, search_artists, get_artist, get_artist_events, list_artists. Artist-action identity objects include nullable mbid and cross-provider-verified spotify_id; artist event payloads include the resolved closest-to-purchase ticket_url.

Long-term rental listings in Da Nang, Vietnam: search by district, property type, bedrooms and monthly price in VND. Use when an agent needs current rentals with prices, districts and listing URLs (contacts are on the listing page). One payment of 0.01 USDC buys 5000 calls on Base, Solana or Arc.

Keyword suggestions API - find long-tail keywords that contain your seed phrase (full-text phrase match), each with Google monthly search volume, CPC, competition, keyword difficulty and search intent. Complements keyword-ideas (semantically related terms) with literal phrase-match variations. For long-tail content and PPC research. No matches returns empty results.

Look up a domain: registration data from RDAP (registrar, created, expires, status, nameservers), live DNS records (A, AAAA, MX, NS, TXT, CNAME), the TLS certificate served at the name (issuer, validity, alternative names, fingerprint), and the HTTP front door (status, server, redirect). One JSON answer, no API key, no rate-limited WHOIS. GET with ?name= or POST. $0.005.

Look up a domain before trusting it: registrar, creation date and age in days, expiry, status flags and nameservers from RDAP, plus A/AAAA/MX/CAA records and email authentication (SPF, DMARC policy). Flags young domains (under 30 days), near expiry, missing SPF/DMARC and p=none. Useful for phishing and vendor checks, outreach hygiene and incident triage.

Look up a person by their email address. Resolves the company from the email domain, then matches the person. Returns the best matching person profile.

Look up a TCG card by its TCGPlayer product ID — Pokemon, Magic: The Gathering, Yu-Gi-Oh, Lorcana, and 50+ more trading card games.

Look up a transaction on Base or Ethereum mainnet: status (success, failed, pending or not_found), block, confirmations, timestamp, from, to, ETH value, gas used, fee, method id and decoded ERC20 transfers with symbols and amounts. Useful to confirm that a payment arrived. Params: hash (0x transaction hash, required), chain ('base' default or 'ethereum').

Look up a UK postcode: coordinates, country, region, council, ward, parish, parliamentary constituency, and ONS/NHS area codes.

Look up a vulnerability by CVE or GHSA id (NVD: description, CVSS score and vector, CWE, CISA known-exploited flag; OSV: affected packages and fixed versions) or check a package version for known vulnerabilities via OSV.dev (npm, PyPI, Maven, Go, crates.io, RubyGems, NuGet, Packagist, Debian ...). Params: cve_id, or package + ecosystem (+ version, recommended), limit (default 20).

Look up any VIN and get the vehicle behind it: year, make, model, trim, body class, engine and transmission specs, fuel type, and where it was built. Registration-grade decode returned as structured JSON with an explicit decode-status field. Zero-hallucination source data for automotive agents.

Look up DNS records for any hostname: query A, AAAA, MX, TXT, CNAME, NS, SOA, CAA, SRV and PTR records with TTLs over DNS-over-HTTPS. Check mail configuration (MX), SPF/DKIM/DMARC TXT records, nameservers and IP addresses. Fast, reliable DNS resolver and record lookup for domain and infrastructure verification.

Look up FDA drug product information by NDC or name: labeler, dosage form, route, marketing status, approval date. Public-domain FDA NDC Directory data.

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.

Look up VAT rates for EU/EEA countries. Returns standard, reduced, zero-rated categories. Supports category-specific queries.

Look up Croatian company data from the Sudski registar (Ministry of Justice Court Register). Accepts OIB (11 digits) or MBS (court registry number). Returns company name, status, address, legal form, VAT.

Look up EU customs duty rates by HS code and origin country. Returns duty rate, preferential rates, anti-dumping status.

Look up HTTP status-code meanings for $0.001 USDC or retrieve the common-code reference.

Look up UK beneficial ownership (UBO / PSC) information for a company. Returns individuals who ultimately own or control the entity, their ownership percentage, and the ownership chain. Uses Companies House Persons of Significant Control. UK-only — non-GB…

Look up UK charities via the Charity Commission API. Search by registration number or name. Returns status, income, activities.

Look up US company data from SEC EDGAR. Accepts CIK number, ticker symbol, or fuzzy company name. Returns company name, CIK, SIC code, state, filings summary.

Look up a 20-char Legal Entity Identifier via GLEIF for $0.002 USDC with status and legal name. Call when you need this bounded result without an API key or subscription. Returns machine-readable JSON via x402 on Base or Solana. Limitation: results cover only the supplied input or one bounded public endpoint at request time; callers must verify before acting.

Look up a PyPI package (?package=)

Resolve a Unicode block name (loose matching) to its range, size, count of assigned characters and a small sample. An unknown block is a successful `found:false`. This is a Unicode Character Database block — not a blockchain block.

Resolve a Unicode script name (loose matching) to its code point ranges, total size and a small sample. An unknown script is a successful `found:false`.

Look up a common MIME type from extension/filename for $0.001 USDC.

Resolve a 20-character Legal Entity Identifier (LEI, ISO 17442) to its authoritative entity record: verified legal name, registration status (ISSUED/LAPSED/RETIRED), entity status, jurisdiction, legal form, registration number, legal and headquarters addresses, key dates (registration, last update, next renewal), managing LOU, corroboration level and any BIC codes. ISO 7064 check digits are verified before payment.

Resolve an emoji by its shortcode (e.g. "smile" or ":smile:") or exact name. Provide exactly one field. Returns the emoji, its metadata and code points.

Reverse lookup: resolve a Unicode character name (e.g. 'SNOWMAN', 'CJK UNIFIED IDEOGRAPH-4E2D', 'HANGUL SYLLABLE GA') to its code point. Loose whitespace/case matching. An unknown name is a successful `found:false`.

Look up supported blockchain network metadata and chain IDs for $0.001 USDC. Static first-party registry only—no live RPC, balances, blocks, receipts, gas, or contract reads.

Resolve ONE DNS record type for a domain -- the cheapest, narrowest domain-check endpoint. For all record types at once, use /domain/intelligence. For a bundled DNS+TLS+headers audit, use /web/audit (raw) or /security/posture (scored). For mail-security plus a scored verdict, use /domain/due-diligence.

Search the federal banking compliance rules database. 56 rules across Reg DD, Reg Z, UDAAP, ECOA, BSA/AML, and more.

Clinical trial lookup against the full ClinicalTrials.gov registry: exact lookup by NCT number, or search by condition, intervention, or lead sponsor. Returns compact trial summaries (status, phases, conditions, interventions, enrollment, sponsor, dates, results availability). U.S. National Library of Medicine / NIH registry data.

Look up US import duty rates by HTS code or product description. Returns the base General (MFN) and Column 2 rates of duty from the official USITC Harmonized Tariff Schedule (public domain). Reference only: Section 301/232, IEEPA and other additional duties are not included.

Look up SEC EDGAR company information by ticker, CIK, or company name. Returns company profile and recent filings.

Resolve a stock ticker symbol or company name to its Central Index Key (CIK) - the identifier every other EDGAR endpoint keys on. Exact ticker matches rank first, then company-name prefix/substring matches. Returns each match's zero-padded CIK, numeric CIK, ticker and official company title.

Who is this phone number or website? Give a US phone number or a website and get the local business behind it: name, address, category, the best email graded A/B/C, a contact name when the email shows one, socials and buying signals. A website only matches when it carries the business's own phone number, so the answer is never a guess. $0.01 per lookup that finds a business; no match, no charge. USDC on Base or Arc.