All projects on Base

Exact symbolic computation (SymPy): simplify, differentiate, integrate, solve equations/systems, limits, series, Laplace/Fourier transforms, arbitrary-precision eval. Expressions are JSON ASTs; every result is numerically verified. Paid in USDC on Base or Solana.

Get the top trending prediction markets on Polymarket, sorted by 24h volume. Returns up to 5 markets by default.

Every field typed. Empty = explained. You never pay for a blank. Multifamily real estate deals feed: property listings with auditable NOI/DSCR underwriting and Hot/Warm/Pass scoring; a filtered query that matches nothing returns free. Want the full workup on one? GET /api/deals/{id}/report ($1.50) adds HUD-underwritten vs claimed NOI/cap, matched distress signals, and a suggested offer range. Sour

Complete structured package for one illustrated classic of early science/engineering (1588-1748): verified public-domain scan, full metadata, curated description, full-text OCR link, IIIF manifest, and page-image URL template. Works: Ramelli machines 1588, Agricola De re metallica 1621, Hooke Micrographia 1665, Newton Principia 1687 & Opticks 1730, Euler Introductio 1748. Param: ?id=<work_id>

Check Base transaction receipt status by transaction hash. Determine whether the transaction is pending, confirmed successful, or confirmed reverted, with receipt, block, and gas details.

Current space-weather conditions — normalized NOAA SWPC Kp, solar wind, magnetic field, and X-ray flux used for solar-flare monitoring, with observation times and freshness.

AgentCheck: independent report on an x402 seller before you pay it. Are its buyers real (repeat wallets on their own money) or funded by the seller itself, measured from 30 days of on-chain payments, plus results of our own paid test purchases where we have them. Query: ?domain=<seller-domain>. GET /sellers (free) lists covered domains.

Fetch any public web page and return clean, readable Markdown with navigation, ads, and boilerplate stripped. For agents that need article text or documentation as Markdown.

High-precision Islamic prayer times (fajr, sunrise, dhuhr, asr, maghrib, isha) plus qibla direction for any coordinates and date. Pure astronomical computation (adhan library), 11 calculation methods including Umm al-Qura, Dubai, Egyptian, MWL. Ideal for agents building Muslim-facing schedules, reminders, or travel plans.

Text to tiny, clean SVG code. Best for icons, logos, lettering and badges. Returns real shapes and editable text, each part its own layer. About 10 s.

Smart contract security and token risk check before you trade, approve, bridge or integrate: deterministic 0-100 risk score for any deployed contract on 20 EVM chains. Flags rug-pull levers (owner mint, blacklist, pause, adjustable fees, upgradeable proxy, ownership not renounced), SELFDESTRUCT/DELEGATECALL, verified source and aderyn static analysis. Read-only. Errors (400 bad input, 422 not a co

AgentWire service card for webhook inbox relay and web fetch infrastructure.

One Canadian retirement residence's record from the Vitrine Retirement Index: Vitrine's score, band and rank, counts and dates of regulator records, and links.

Create a new browser session ($0.10). Optionally pass sessionId to resume an existing Browserbase session. Returns sessionId (Browserbase session ID) to use for all subsequent calls.

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

Fashion brand ethical sourcing check — labor practices, environmental impact, animal welfare, and supply-chain transparency for any apparel brand, grounded in Wikirate, the UK Modern Slavery Statement Registry, the Fashion Transparency Index, the Responsible Minerals Initiative, and litigation trackers. Free open-registry sources only, never a paid rating service.

Agent-tier preview of the AI-visibility check: live pass/fail scan of the actual website — robots.txt AI-crawler blocks (GPTBot, ClaudeBot, PerplexityBot, Google-Extended + 10 more), llms.txt presence, Schema.org structured data, sitemap presence — plus a deterministic grade. No fix plan, no prioritization, no evidence rows (those are in the $0.50 full check). Any domain, any country.

Eight quarters of a US public company's reported fundamentals, straight from SEC XBRL. Answers "Apple revenue last 8 quarters", "is NVDA net income growing", "MSFT EPS trend". Revenue, net income, diluted EPS per quarter with computed YoY changes and the exact XBRL tag used — every number verbatim from data.sec.gov companyfacts, nothing modeled. Accepts ticker, company name, or CIK. No LLM, no key

Quick on-chain rug verdict for a Solana mint (RED/AMBER/GREEN + 0-100 risk score with weighted, evidenced flags): mint and freeze authority, Token-2022 risk extensions (permanent delegate, transfer hook, transfer fee, default-frozen, pausable, non-transferable), top-10 holder concentration with pump.fun curve / AMM pools / burn excluded, pump.fun curve status. Compact JSON for bots screening every

Premium machine-readable x402 commerce intelligence bundle: catalog snapshot, median pricing signals, earning playbooks, and ecosystem JSON for agents optimizing marketplace presence.

Check if a payment settled or is safe to retry. Prevents double-charging on timeout.

Create a private 24-hour test email inbox. Includes three attachment-free messages, exact sender and optional subject matching, OTP/link extraction, and authenticated reads and waits. One payment per inbox; save a client-generated access token before purchase for recovery.

OpenAI IPO data as JSON: confidential S-1 filing status and announcement date, reported 2027 listing expectations, Sam Altman ruling out a 2026 IPO, latest verified private funding round committed capital and post-money valuation, banks reported working on filing preparation (not confirmed underwriting mandates), and dated timeline. Each factual item has a source reference and verification grade;

Dated crypto catalysts (unlocks, mints, listings, macro) with a long/short bias and 0-1 magnitude each.

Check any x402 paid endpoint before paying it: does it return a valid 402 challenge, which networks/tokens/prices it accepts (decoded to USD), whether amounts are valid atomic units, payTo sanity, testnet-only offers, missing Bazaar input schema, redirects and latency. Returns a verdict (payable / payable with warnings / broken / unreachable) and the exact problems. Useful for agents choosing betw

Prepaid credit of $1.00 for paid API calls without signing each request. On Radar CNPJ it pays for Brazilian company (CNPJ) lookups at $0.002 per call, a due diligence dossier at $0.01 per company, partner and contact reveal at $0.005, company monitoring at $0.10 per company for 30 days, ZIP code (CEP) lookups at $0.001 per call, batch checks at $0.002 per valid CNPJ and CNPJ and address lookup pa

Values of one XBRL concept as filed by a US company (us-gaap, dei or ifrs-full): period end and start, value, unit, fiscal year and period, form, filing date, accession and frame, newest first. Body {"ticker":"AAPL","concept":"NetIncomeLoss","limit":10}; optional form (10-K or 10-Q) and unit.

Cron next-run calculator — generate future times for bounded five-field POSIX cron schedules in IANA timezones with explicit daylight-saving (DST) policies.

Base token check: send an ERC-20 contract address on Base and get verifiable on-chain facts as JSON (name, supply, owner and whether ownership is renounced, upgradeable proxy, verified source, privileged-function hints such as mint/pause/blacklist, WETH/USDC liquidity on Uniswap V2/V3 and Aerodrome) plus risk flags and a short plain-language summary. Facts only, not financial advice. Does not chec

PKCS#10 certificate signing request (CSR) inspector — parse requested identities and public-key metadata, calculate a fingerprint, and check the included self-signature without CA approval claims.