Every agent-payable API.

Given a reaction and the supplied amount of every reactant, identify the limiting reagent and compute leftover reactant and theoretical product yields.

Chess.com player ratings and record: current, best and lowest across blitz, bullet, rapid and daily with W/L/D counts, plus tactics and puzzle rush bests. Pass a username. Keyless.

Does this Chicago address have open building code violations? Query any street address in Chicago, Illinois and get recent DOB building violations with codes, status, and inspector comments. For tenant screening, landlord diligence, and lending checks. Input: address string. Output: JSON, live City of Chicago open data. Note: citywide rental-license registry is not published as a single open feed.

Chile medical-equipment public buyer demand map

Search Chile public procurement buyer demand across the full July 2026 ChileCompra OCDS population. Returns ranked public-sector buyer leads with regions, matching-tender counts, budget evidence, UNSPSC codes and official source URLs.

Chiliz (CHZ) price in USD now, with 24h and 7d change — Genesis402 / UnyKorn Operator Network

China A-share major indices snapshot in one call: Shanghai Composite, Shenzhen Component, ChiNext, and CSI 300 — with price, change, percent change, day range and volume. The whole-market glance Chinese retail investors check every session. A股四大指数一览：上证指数、深证成指、创业板指、沪深300，含最新点位、涨跌、涨跌幅、振幅、成交量，一次调用看全大盘。A株主要指数スナップショット。Panorama de indices bursatiles de China A. Accepts payment on Base or Solana — either network works.

China A-share single-stock money-flow: main-force (institutional) net inflow over recent sessions, with net amount, main-force ratio and daily breakdown. The 'is smart money buying this stock' check Chinese retail investors run before chasing. A股个股主力资金流：查任意A股近N日主力净流入、净额、主力占比，散户追涨前先看主力在不在买。A株個別銘柄の資金フロー。Flujo de capital por accion del mercado A. Accepts payment on Base or Solana — either network works.

China industrial-theme momentum: which Chinese tech/industrial narratives (AI compute, semiconductor localization, robotics, defense, new energy) are heating up — aggregate rotation strength + per-Shenwan-board rotation score, rank, trend, lifecycle phase (emerging/sustained/fading), English-labeled. Quant structure, no news text. What China is betting on in tech, for global investors' agents. Query: ?tag=ai|semi|robot|defense|new_energy (optional filter).

China market daily brief — one call returns a synthesized snapshot of today's China: social pulse (Weibo/Baidu/Douyin top trends + finance buzz), market events (type distribution + top by mentions), critical/high risk alerts, hot industrial themes, and top sector rotation. English-labeled overview; full data lives in the dedicated endpoints. Query: ?top=5 (items per hot-search board, 1-10).

China pulse, cheap enough to POLL: what China is talking about RIGHT NOW and what is NEW since your last call - built for agents that monitor continuously. Returns `consensus` (phrases trending on 2+ of Weibo/Baidu/Douyin at once = nationwide attention, not single-board noise), a `finance` slice, and `new_since` (what entered the boards in the last N minutes) so every poll returns fresh information. Structure only, no article text. ?since=1-120&limit=1-30.

Signed spend receipts for agent x402 payments — who paid which call, verifiable by a third party. Treasury desk and possession book for agent spend — export, policy, evidence. POST /v1/chat/completions is the x402 USDC door on Base and Solana. Returns signed receipt + public verify_url. Paying this host is real mainnet USDC.

Treasury desk and possession book for agent spend. Who paid which call — export, policy, evidence. POST /v1/chat/completions is the x402 USDC door on Base and Solana. Returns signed receipt + public verify_url. Paying this host is real mainnet USDC.

Resolve a local time to an exact UTC instant with explicit DST ambiguity handling, business-day arithmetic, public-holiday status, and working-hour overlap across timezones. Detects ambiguous and nonexistent local times instead of silently shifting them. Declares its IANA tzdb release and per-jurisdiction holiday provenance.

Call when an agent needs text chunked by characters or tokens with overlap. No network. Exact $0.002 USDC. Prefer unpaid POST /v1/sandbox/chunk-text first.

Cancels adjacent identical self-inverse gates on identical ordered targets and folds adjacent RX, RY or RZ rotations on identical targets. It preserves only these local identities; it does not commute gates, model hardware topology, synthesize arbitrary unitaries or prove global optimality.

Check citation metadata before an evidence review. Compare up to 20 declared source identities, revisions and locators; return exact mismatches and an integrity receipt. No source retrieval, passage-existence check or claim-support verification.

Cited area reported-crime context for an address. Returns municipal incident feeds (Cary, Raleigh, Charlotte) with counts + categories where wired, or official county/agency source links (NC SBI, SC SLED, FBI CDE) elsewhere. Area-level only -- never street/block, person/case data, or a verdict. Charge-free when no jurisdiction resolves.

Cited web answer for AI agents - ask a question, get a short answer with verbatim quotes and source URLs from the live web in one call (neural search + page read + synthesis together). Research, fact check, news since a date, domain-scoped lookups, "what happened with X". Not a raw SERP - a finished, cited answer. POST {question, since?, domains?, max_sources?}. Free sample: /web/example.

Validates an 18-digit Mexican CLABE (sent as a JSON body, not a query param): check digit, bank identification (Banxico/SPEI catalog), plaza, and account number.

Claimable balances waiting for an account — Genesis402 / UnyKorn Operator Network

Agent-friendly multi-chain faucet routing through verified CDP and Paxos testnet providers. The asset-specific x402 charge pays HivemindOS for programmatic payment, provider routing, idempotency, and quota enforcement; test tokens have no sale price or monetary value.

Classified Hyperliquid whale positioning: net bias, total net USD, long/short ratio across every account >= $100k, with per-coin gross/long/short/net.

Text classification (sentiment analysis, topic tagging, intent detection, moderation labels...) into one of your own labels, with a confidence score, via Claude Haiku 4.5. JSON body: {text: string (max 8000 chars), labels: string[] (2 to 20 labels)}.

Classify text into your labels with confidence and per-label scores. Single- or multi-label. Cheap and high-volume: routing, tagging, moderation triage, intent.

Classify text into YOUR labels (single or multi-label) with confidence and reason — Genesis402 / UnyKorn Operator Network

Classify text into user-defined categories. Supports single-label and multi-label. MiniMax M2.7 inference.

Classify a company's industry using standard codes. Given a company name, description, or website URL, returns SIC, NAICS, and NACE codes with confidence levels.

Classify a field-name inventory for likely sensitive data without inspecting values. Use it as a bounded preflight or analysis step inside an enterprise agent workflow before data, policy, integration, security, or commercial decisions reach production. Returns deterministic machine-readable JSON for $0.003 USDC via x402 on Base. Execution is first-party, local-only, stateless, memory-only, and has no paid upstream or input retention. Results are advisory; the caller remains responsible for aut…

Classify a signal against optional upper and lower thresholds — call when classifying a signal against upper/lower thresholds. Use on caller-supplied ticks/returns when agents need signal prep without a licensed live market feed (ottoai-class demand, first-party transform). Returns deterministic machine-readable JSON for $0.003 USDC via x402 on Base. Execution is first-party, local-only, stateless, and memory-only with no paid upstream, no input retention, and no claim of live chain tip, web se…

Classify dangerous goods by UN number or substance name. Returns hazard class, packing group, labels, marine pollutant status. 200+ substances.

Classify text into categories. Optionally provide custom categories. Returns primary category, confidence scores, topic keywords, and summary.

Classroom Checklist builder: Turn supplied steps into a numbered checklist. Tailored for classroom workflows.

Classroom Simple project planner: Distribute a short task list across available days. Tailored for classroom workflows.

Claude pricing table: what every Claude model costs per token right now — Claude 5, Claude Opus, Claude Sonnet, Claude Haiku — from Anthropic and every provider that resells or hosts them (Bedrock, Azure, Vertex, OpenRouter, Fireworks). Input, output, cache and batch USD per 1M tokens, sorted cheapest first, so you can compare Claude inference cost across hosts and pick the cheapest place to run one. Normalized, cross-checked, refreshed hourly.

Clean an email list: pass ?emails=a@b.com,c@d.com (up to 100 in one call) and get a verdict per address plus totals. Each address is checked for usable shape, for MX records read live over DNS, against 25 known disposable-mail domains and against 27 role-account names like info, support and admin. Verdicts are deliverable-domain, role-account, disposable, undeliverable, unknown or invalid, and each one says in words what it means.

Extract clean readable text from caller-supplied HTML (no URL fetch).

Clean, LLM-ready markdown from any URL. JavaScript rendering included. Feed web content directly into agent context without parsing HTML.

Clearsigned — the trust layer with no stake in the outcome. Submit {claim, evidence[]}, receive an Ed25519-SIGNED, evidence-bearing receipt (verify offline against GET /pubkey; every receipt is chained in the public ledger at GET /ledger/verify). Flat price, verdict-independent; refunds only for failure to deliver. Current mode is honestly labeled in each receipt.

Returns the German Weather Service reference-period values for the station nearest a coordinate: monthly means and annual totals for air temperature, precipitation and sunshine duration, plus the mean annual counts of frost days, ice days, summer days and hot days.

Clinical Trial Search (ClinicalTrials.gov). Clinical trial search on ClinicalTrials.gov by condition, drug/sponsor/NCT id, location, status and phase: title, phases, sponsor, interventions, enrollment, dates, eligibility and matching trial sites (facility, city, country).

Which companies just opened a new clinical trial or site? Bulk feed over NIH ClinicalTrials.gov interventional, industry-sponsored studies, newest-first by registry-posting date (the R&D / commercial-growth signal). Cursor-paginated up to 1000/page, filterable by sponsor, phase, status, condition, intervention type, site state, or since. Rows carry sponsor, phase, status, conditions, enrollment, dates, site count, and the US states sited. Observational registry records, never a prediction.

ClinicalTrials.gov registry lookup by company, drug, or intervention; returns study status, phase, sponsor, enrollment, and completion data. Registry data only, not medical advice or proof of efficacy.

Find recently updated ClinicalTrials.gov study identifiers, titles and registry status for a condition, with the registry processing date. No medical conclusion.

Lyme disease public use aggregated data with geography, 2022-2023 (Centers for Disease Control and Prevention): one record by its identifier from the agency's published dataset, with a provenance chain and an Ed25519 attestation on every response.

CISA Known Exploited Vulnerabilities status for one CVE: whether it is on the KEV catalog, the due date, required action and ransomware-campaign flag.

Clink Forge raw data product 'auto-nchs-births-and-general-fertility-rates-united-states-lookup': pay-per-call government data with a provenance chain and an Ed25519 attestation on every response.

Cloudflare Workers AI pricing table: per-token cost of every AI model Cloudflare Workers AI serves, in one call — input, output, cache and batch USD per 1M tokens, ranked cheapest first, with context window and capability flags joined in. Compare LLM token cost inside Cloudflare Workers AI and against other providers hosting the same model. Normalized from public sources, cross-checked, refreshed hourly.

Where are corporate insiders buying or selling as a cluster? Search SEC Form 4 clusters — issuers where several distinct officers/directors/10%-owners transacted the same direction in a trailing 30- or 90-day window (buy=accumulation, sell=distribution). Filter by ticker, direction, window, minimum insiders, minimum value, or exchange. Returns issuer ticker/company/exchange, insider count, and total shares/value. Public SEC filings as filed — observational, not advice.

CMS Care Compare quality record by CCN for a snf. Answers: what are the quality ratings and performance measures for this facility? Source: CMS Care Compare.