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.

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.

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.

Soil and agriculture intelligence for grower, agronomist and farming agents at any lat/lon. Returns live soil moisture at four depths, soil temperature at 0/6/18/54 cm, reference evapotranspiration (ET0), vapour pressure deficit and frost risk. For irrigation scheduling, soil-health monitoring and crop management.

DeFi TVL (total value locked) for AI agents. Query a single protocol by slug (aave, uniswap, lido) for its current USD TVL, a specific chain by name, or omit both for the top 20 chains ranked by TVL. Sourced from DefiLlama — on-chain liquidity and DeFi health signal in USD.

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.

Air quality, pollution and environmental data for any city or lat/lon. Returns European and US AQI (air quality index), particulate matter PM2.5 and PM10, ozone (O3), nitrogen dioxide (NO2), sulphur dioxide (SO2), and carbon monoxide (CO). Real-time index for health, allergy, pollution-monitoring and environmental agents.

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.

Watch a token for 24 hours ($0.10). Returns a ticket. Poll it later for alerts: liquidity down 30 percent, price down 50 percent, top holder up 10 points, creator balance down 50 percent. Plain language, one sentence each. Pay once, then poll as often as you like at a few cents a poll.

Ask a real person a multiple-choice question: how a message feels, which option a person would prefer, or whether to go ahead with an action before you take it. Send 'question' and 2-6 'options'; a human picks one within 24 h. Poll the returned status_url. Not for facts or code. Declined or late requests are refunded.

The plain-language card for a token ($0.10): who holds the supply, who can pull the pool, who holds powers over the token, and the largest sensible position, in under 900 characters, as text plus a verdict (go, caution, no_go). Free quote first at /v1/holders/quote, then ?quote=<id>. Not financial advice.

Ask a watch what changed ($0.01). Pass the ticket from /v1/watch/start. Compares the token now with the last poll and returns plain-language alerts, if any. Not charged if the market data is unavailable or the watch has expired.

Use when you need the official weather forecast for a point in South Korea for the next ~3-5 days. Data: KMA (Korea Meteorological Administration) village forecast on a 5 km grid, issued 8 times a day. Input: lat, lon (WGS84 decimal; Korea only). Output: JSON hourly then 3-hourly temperature C, sky, precipitation type and probability %, rain and snow amounts, humidity %, wind; plus daily min/max. Example: ?lat=37.5665&lon=126.978

Get a price from a real person for a task in the physical world, such as phoning a business or checking something in person. A human quotes a price and delivery time within 24 h; you accept by paying the quote. The fee is refunded if the request is declined.

Consolidated investigation file for one wallet: identity signals, funding and outflow behaviour, cluster membership, and the tokens attributed to it, assembled into a single report. The heaviest route in the catalog — it aggregates what the cheaper endpoints answer separately.

Use when you need actual apartment sale prices in a South Korean district for a month (property research, valuation, comps). Data: MOLIT (Korea land ministry) reported deals since 2006, updated daily. Input: region (5-digit LAWD_CD, e.g. 11680 Gangnam-gu), month (YYYYMM). Output: JSON trades with contract date, complex (Korean + romanized), area m2, floor, build year, price in KRW and USD, price per m2, deal type, cancelled flag. Example: ?region=11680&month=202609

Check a Base ERC-20 for a honeypot-style transfer cost before a swap or send. Input: one token address. Output: allow, warn, or block. Block: not a contract or not an ERC-20. Warn: bytecode contains taxFee, liquidityFee, sellFee, buyFee, transferFee, isBlacklisted, or maxTxAmount. USDC warns because it contains isBlacklisted(address). A selector does not prove the fee, blacklist, or cap runs on every transfer, and this check does not simulate one.

Llama API - pay per call, no API key. OpenAI-format chat completions on meta-llama/llama-4-maverick, pinned to DeepInfra for reliability. You sign a fixed price computed from your max_tokens; unused tokens are not refunded. 20s server-side timeout - never charged if it fires; set your client timeout to 30s. Try GET /llm/llama/sample.

Ask a real person for a short written answer where human judgment matters: an opinion, a moral or social call, taste, or native-speaker intuition. Send 'question' (and optional 'context'); a human answers within 24 h. Add follow_up_of to continue a conversation with the same person. Not for facts or code. Declined or late requests are refunded.

Buy a 30-day verified agent listing for $0.01 USDC. AgentIndex audits reachability, x402 compatibility and discovery manifests, then publishes a machine-readable registry entry and score badge for buyer trust and SEO.