api.syntaxrate.com
AI agent API profitability calculator with Monte Carlo revenue simulation, breakeven analysis, pricing benchmark, and risk scoring for x402 API monetization.
$0.005000 USDC
scout.hugen.tokyo
Search Dev.to for developer articles, tutorials, and technical blog posts. AI agent API for developer content and trend research. Accepts USDC payments on Base and Solana
$0.01 USDC
2s.io
Look up a Python package on PyPI by name. Returns version, summary + long description, content-type, project URLs (Homepage, Source, Bug Tracker, Docs, etc.), license, author + maintainer (with emails), keywords, classifiers (top 30), requires-python spec, requires-dist (top 100 runtime deps), the 50 most recent releases with publish dates, and any yanked versions in that window. PyPI public registry.
$0.001200 USDC
2s.io
Resolve a DOI to authoritative bibliographic metadata via Crossref. Accepts bare DOI (10.1038/nature12373) or full DOI URL (https://doi.org/10.1038/nature12373). Returns work type, title, container (journal/conference), publisher, issued/published dates, abstract, authors (with ORCID + affiliations), page range, volume/issue, ISBN + ISSN lists, canonical URL, reference + citation counts, license blocks, and subject classifications. ~160M works in Crossref. Best authoritative DOI → bibliographic resolver. Metadata is CC0.
$0.001200 USDC
2s.io
Look up an npm package by name (supports scoped packages like @sentry/node). Returns description, homepage, repository, license, author + maintainers list, keywords, distTags (latest/beta/rc/etc.), latest version + publication date, and the 50 most recent versions with their publish dates + deprecation status. ~3M JavaScript/TypeScript packages. npm public registry.
$0.001200 USDC
2s.io
US 501(c) nonprofit organization search. Lookup by 9-digit EIN (with or without hyphen), free-text name, 2-letter state, NTEE category code (e.g. 'B99' for education), or IRS subsection code (3 = 501(c)(3), 4 = 501(c)(4), etc.). Each record includes EIN, name, city/state, NTEE code, subsection code + human-readable subsection description (e.g. '501(c)(3) Charitable / Religious / Educational'), and relevance score. Sourced from ProPublica Nonprofit Explorer, which aggregates IRS Form 990 + BMF data; underlying IRS data is public domain.
$0.001200 USDC
2s.io
Unified read API over US National Park Service developer.nps.gov. Pick a resource: parks (every NPS unit — historical parks, monuments, seashores, etc.), alerts (closures, dangers, info), campgrounds (NPS-operated campgrounds with reservation links), events (talks, walks, ranger programs), newsreleases (park news), thingstodo (activities by park), visitorcenters. Filter by parkCode (CSV — e.g. "acad,yose,grca"), state, or free-text query. Returns the upstream NPS payload verbatim (rich nested objects with images, addresses, operating hours, etc.).
$0.001200 USDC
2s.io
Search US federal lobbying disclosures (Senate LDA filings) — who lobbies for whom, on what issues, for how much. Filter by registrant (lobbying firm name), client (organization being represented), lobbyist (individual name), year, period (first_quarter|second_quarter|third_quarter|fourth_quarter|mid_year|year_end), and type (e.g. RR=registration, Q1-Q4=quarterly reports). Each filing: type, year/period, reported income or expenses (USD), registrant + client (id/name/description/state), lobbying issues (code + description), lobbyist count, official document URL, posted timestamp. Money-in-politics, journalism, and policy-intelligence staple. Public federal data.
$0.002880 USDC
2s.io
Daily Treasury Statement (DTS) operating cash balance via US Treasury Fiscal Data. Returns daily snapshots of the Treasury General Account (TGA) at the Federal Reserve plus tax-and-loan accounts and Federal Reserve deposit accounts. Each row carries record_date, account_type, close_today_bal, open_today_bal, open_month_bal, open_fiscal_year_bal. Useful for liquidity-tracking agents and macro researchers watching the Treasury Cash Balance heading into Treasury auctions, debt-ceiling pinch-points, etc. Fiscal Data filter syntax.
$0.001200 USDC
2s.io
Fetch a Wikidata entity (Q42, P31, etc.) — structured knowledge-graph record with labels + descriptions + aliases in selectable languages, claims (property → value statements grouped by property ID), sitelinks (Wikipedia article title per language). 110M+ entities. CC0 public domain. Pass languages= as comma-separated codes (default "en") to control which language strings are included; pass maxClaimsPerProperty to cap how many statements come back per property (default 10).
$0.001200 USDC
2s.io
Official US Treasury exchange rates via US Treasury Fiscal Data. Used by federal agencies to report foreign-currency transactions in USD. Quarterly + ad-hoc updates per country/currency pair. Each row carries record_date, country, currency, country_currency_desc, exchange_rate, effective_date. Pair with `/api/fx/rates` (ECB Frankfurter, daily market rates) for cross-validation. Use Fiscal Data filter syntax — e.g. `filter=country:eq:Brazil` to scope to a single country.
$0.001200 USDC
2s.io
US National Debt — daily "Debt to the Penny" via US Treasury Fiscal Data. Each row carries record_date, debt held by public, intragovernmental holdings, and total public debt outstanding (all USD, signed integers as strings to preserve precision). Optional `filter` uses Fiscal Data syntax: `col:op:val` joined by commas (ops: eq, lt, lte, gt, gte, in). Default sort is `-record_date` (newest first). Authoritative source for "how much does the US owe?" — every weekday since 1993.
$0.001200 USDC
2s.io
Look up a US-registered aircraft by tail number (N-number, e.g. N757F) or icao24 Mode-S hex (e.g. aa3487). Pass exactly one of `tail` or `icao24`. Returns the airframe: registration, manufacturer, model, ICAO type code + class, serial number, operator, owner, build year, engines, category, plus the icao24 Mode-S address that ADS-B transponders broadcast — use it to join live flight-tracking feeds. ~307k US airframes. 404 if no match. Source: OpenSky Network aircraft database (CC-BY-SA).
$0.001440 USDC
2s.io
Get average solar resource estimates for any latitude/longitude via NREL. Returns annual + monthly averages for: Direct Normal Irradiance (DNI, kWh/m²/day — solar concentrators), Global Horizontal Irradiance (GHI, kWh/m²/day — flat-plate panels), and Tilted-At-Latitude irradiance (optimal fixed-panel orientation). Sourced from NREL National Solar Radiation Database (NSRDB). Useful for rooftop solar feasibility, off-grid design, and renewable-energy modeling.
$0.001200 USDC
2s.io
Locate alternative-fuel stations across the US via NREL Alternative Fuels Data Center. Search by lat/lon + radius (miles), state, or zip. Filter by fuelType (BD=Biodiesel | CNG=Compressed Natural Gas | ELEC=Electric vehicle charging | E85=Ethanol | HY=Hydrogen | LNG=Liquefied Natural Gas | LPG=Propane | RD=Renewable Diesel), status (E=Available | P=Planned | T=Temporarily Unavailable), access (public/private), and EV network. For EV chargers, returns connector types (J1772, CHAdeMO, Tesla, etc.), Level 1/2/DC-fast counts, pricing, and access hours. Indispensable for trip-planning agents, fleet logistics, EV-adoption analysis.
$0.001200 USDC
2s.io
Related-word lookup via Datamuse. Supply a seed word and a relation kind: rhymes, near-rhymes, synonyms, antonyms, means (semantic match), triggers (associated by usage), homophones, sounds-like (phonetic neighbour), spelled-like (typo / wildcard), follows-from (words that come after), preceded-by (words that come before). Returns ranked candidates with relevance score, syllable count, and grammatical tags. Useful for content generation, rhyme/poetry, vocabulary expansion, and naming agents.
$0.001200 USDC
2s.io
World Bank Open Data — fetch a time series of a specific indicator for a country (or 'all'). 1000+ indicators across 200+ countries, many series going back to 1960. Indicator codes are dotted-token strings, e.g., NY.GDP.MKTP.CD (GDP current US$), SP.POP.TOTL (population total), FP.CPI.TOTL.ZG (inflation CPI annual %), SL.UEM.TOTL.ZS (unemployment %), SE.ADT.LITR.ZS (adult literacy %), SP.DYN.LE00.IN (life expectancy). Country = ISO 2-letter (e.g., US, CN), ISO 3-letter (USA, CHN), or 'all'. Optional yearFrom/yearTo bracket. Each observation: country id+name, year, numeric value (may be null for missing), obsStatus. Returns indicator name + total count + pagination metadata.
$0.001200 USDC
2s.io
English dictionary lookup via dictionaryapi.dev (Wiktionary-sourced). Returns full entries with IPA phonetic transcription(s), audio pronunciation URLs, and meanings grouped by part of speech. Each meaning carries definitions with usage examples and per-definition synonyms + antonyms. CC BY-SA 3.0/4.0 — attribute when redistributing. Useful for vocabulary agents, writing assistants, language-learning tools.
$0.001200 USDC
2s.io
Search state Secretary-of-State business registries, normalized to one schema across states. Currently supported: NY (active corporations + LLCs), CO (all entities incl. status), and CT (Business Registry Master incl. type, status, NAICS). Query by name (partial, case-insensitive) or exact entityId; results: state, entity id, name, type, status, formation jurisdiction, formation date, principal/registered address, registered agent. KYC, vendor due-diligence, and counterparty-verification staple. Each state sourced from its official open-data portal.
$0.002880 USDC
2s.io
Search confirmed exoplanets in the NASA Exoplanet Archive (~6,000, updated weekly — past any LLM training cutoff). Filter by name (planet, partial), hostStar (partial), discoveryYear, or method (e.g. "Transit", "Radial Velocity", "Microlensing"). Each planet: name, host star + how many stars/planets in the system, discovery method/year/facility, orbital period, semi-major axis, radius (Earth radii), mass (Earth masses), equilibrium temperature, insolation; host-star spectral type/temperature/radius/mass; distance in parsecs + light-years; and RA/dec. Astronomy, habitability research, science education. Public-domain NASA data.
$0.001440 USDC