Exact finance maths: loan repayment and total interest, compound growth with regular contributions, NPV and IRR of cash flows, and ROI with annualised return.

Line-by-line difference between two texts (up to 3,000 lines each): added, removed and unchanged lines in order, with counts.

Convert CSV (or TSV) to JSON rows with the header row as keys; numbers and true/false are typed, quoted fields and embedded newlines handled. Up to 50,000 rows.

Encyclopedia summary of a topic: title, one-line description, the lead paragraph as plain text, thumbnail and article link, in any language edition.

Is this URL up? Live check: HTTP status, every redirect hop, response time, content type and size, server and security headers (HSTS, CSP).

ERC-20 token balance of any Base network wallet (the main US-dollar stablecoin by default): raw units, decimals, symbol and formatted amount.

Use this when you need the holdings of a Robinhood Chain address: ETH plus up to 20 tokens, read on-chain in one Multicall3 call. Price: $0.005 in USDC on Base or Solana, or $0.02 in USDG or $SWOGE on Robinhood Chain (tool price + settlement cost, minimum $0.02).

Live US-dollar price of any Base network token, read directly from on-chain exchange pools (direct stablecoin pools and routes through wrapped ETH; the best quote wins). Returns price, route and pool fee tier.

Crypto market Fear & Greed index: today's score (0-100) and classification, plus up to 30 days of history for trend.

DNS and email-security check of a domain: A, AAAA, MX, NS, TXT and CAA records, plus SPF and DMARC presence and policy, with plain findings (e.g. 'no DMARC: mail can be spoofed').

DNS lookup for up to 10 domains in one call: A, AAAA, MX, NS, TXT, CNAME, CAA and SOA records as structured JSON.

The Paxie.Matrix desk's closed trades on Solana and Robinhood Chain since a time, for auditing its track record: book (main or explore), mode (paper = simulated fills on live prices, no real money), desk and lane, token, open and close times, return on cost with fees, peak gain and exit reason. Random-twin baseline desks are excluded. Aggregates are free at /v1/desk/stats. Data rewritten every 60 s; refused (503, not charged) if older than 10 min.

Scored Robinhood Chain buyer bursts from the last 1-24 hours. Each row has its rug check and 30-minute outcome: return at 30 min, peak, the return under each exit rule (2% round-trip costs included) and whether the liquidity was pulled. Outcome fields are labels, not features (see /v1/fields). Data rewritten every 20 s (<= 30 s behind the chain); data older than 120 s is refused with a 503 and not charged.

Everything in one call, Robinhood Chain and Solana: live buyer bursts on both chains (last 1-240 minutes, all tiers), Robinhood pools opened in the last hour, and 24-hour tallies (bursts, scored, median 30-minute return, rug check, pump.fun graduations). Data rewritten every 20 s; data older than 120 s is refused with a 503 and not charged.

InboxGuards Email Test: Email deliverability and security report for a real email you sent. 1) POST /v1/tests (free) for a one-time address + read token. 2) Send one real email to it. 3) GET this with ?test_id= and X-Read-Token. Report: SPF, DKIM (key size, alignment), DMARC, ARC, BIMI, sending IP rDNS + SpamCop, MTA-STS/TLS-RPT, one-click unsubscribe, headers, content, 0-100 score, top fixes. Not-ready/unknown tests: 4xx, never charged.

Position-size and risk calculator for trading agents: from account size, risk % per trade, entry and stop (optional target and leverage) get the position size, notional, money at risk, reward-to-risk ratio, break-even win rate and an estimated liquidation price. Pure arithmetic, not financial advice.

Tide predictions and sea-level forecast for any coastal location: hourly sea-level height (meters) plus derived high and low tide times, next 24 hours by default. From Open-Meteo Marine. For shipping, fishing, surfing, and coastal or port operations that need tide tables.

Treasury yield curve ($0.01): US Treasury yields from 1 month to 30 years, par and real (TIPS), daily changes, 2s10s, 3m10y and 5s30s spreads with inversion flags, 10-year breakeven inflation, SOFR, EFFR and euro STR. Official Treasury and Fed data.

Historical daily weather (archive): temperature min/max, precipitation, conditions for a past date range. City or lat/lon. start/end optional — defaults to last 7 complete UTC days.

Place search / geocoding autocomplete for AI agents: return the top matching places for a name query. Each result carries name, latitude, longitude, country and ISO code, administrative regions, population, timezone and feature code. Query by q= with an optional count= (1-20, default 5). Sourced from Open-Meteo geocoding — keyless, unified schema.