Every agent-payable API.

Check if a specific date is a business day in a given country. Accounts for weekends and public holidays. Also returns the next business day if the given date is not one.

Check tests, rollback, observability, ownership, and security review before deploy. 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 auth…

Check the status and availability of a domain.

Check whether a string is a float. Call when you validate decimal form fields before parse. Returns valid boolean for $0.001 USDC via x402 on Base. No network, no keys, no retention; first-party local JSON only. Results are advisory; the caller owns budgets, auth, and production controls.

Check whether a string is a signed integer. Call when you validate numeric form fields before parse. Returns valid boolean for $0.001 USDC via x402 on Base. No network, no keys, no retention; first-party local JSON only. Results are advisory; the caller owns budgets, auth, and production controls.

Check whether a value sits in [min,max]. Call when you preflight budgets, scores, or clamp decisions. Returns boolean in_range with bounds for $0.001 USDC via x402 on Base. No network, no keys, no retention; first-party local JSON only. Results are advisory; the caller owns budgets, auth, and production controls.

Check whether an IP is inside a CIDR network for $0.001 USDC. Call when you need this bounded result without an API key or subscription. Returns machine-readable JSON via x402 on Base or Solana. Limitation: results cover only the supplied input or one bounded public endpoint at request time; callers must verify before acting.

Check whether an address already matches its EIP-55 checksum form — call when verifying an address already matches EIP-55 form. Use for chain input hygiene without live RPC—adjacent to OneSource-class small chain reads, but static/local only so rights and margin stay clear. 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…

Check whether an architecture decision record contains accountable essentials. 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 authoriza…

Check whether an object has a key. Call when you preflight required fields before paid calls. Returns has boolean and key for $0.001 USDC via x402 on Base. No network, no keys, no retention; first-party local JSON only. Results are advisory; the caller owns budgets, auth, and production controls.

Check whether an object is empty. Call when you gate agent workflows on empty JSON bodies. Returns empty flag and size for $0.001 USDC via x402 on Base. No network, no keys, no retention; first-party local JSON only. Results are advisory; the caller owns budgets, auth, and production controls.

Check whether list a is subset of list b. Call when you verify required tags are present in agent sets. Returns subset boolean for $0.001 USDC via x402 on Base. No network, no keys, no retention; first-party local JSON only. Results are advisory; the caller owns budgets, auth, and production controls.

Check whether text contains a needle (optional ignore_case). Call when you need a cheap membership check on agent-held strings. Returns boolean result with ignore_case flag for $0.001 USDC via x402 on Base. No network, no keys, no retention; first-party local JSON only. Results are advisory; the caller owns budgets, auth, and production controls.

Check whether text ends with a suffix. Call when you validate file extensions or content-type suffixes. Returns boolean result and suffix for $0.001 USDC via x402 on Base. No network, no keys, no retention; first-party local JSON only. Results are advisory; the caller owns budgets, auth, and production controls.

Check whether text starts with a prefix. Call when you gate URL/scheme or header prefix checks before egress. Returns boolean result and prefix for $0.001 USDC via x402 on Base. No network, no keys, no retention; first-party local JSON only. Results are advisory; the caller owns budgets, auth, and production controls.

Check whether value is a JSON array. Call when you validate agent payloads before list ops. Returns boolean result for $0.001 USDC via x402 on Base. No network, no keys, no retention; first-party local JSON only. Results are advisory; the caller owns budgets, auth, and production controls.

Check whether value is a JSON object. Call when you validate agent payloads before object ops. Returns boolean result for $0.001 USDC via x402 on Base. No network, no keys, no retention; first-party local JSON only. Results are advisory; the caller owns budgets, auth, and production controls.

Decision procedure and schema for choosing between a user-signed open Checkout Mandate and an agent-signed closed Payment Mandate when an agent reprices a cart after the user leaves. Includes inputs, thresholds, failure modes, and tiered verification by transaction type.

Start async check if a company sells a specific product/service.

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.

Chess.com public player profile: name, title, country, followers, league, join and last-online times and streamer status. 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.

Curated shelf of public-domain children's and young-adult classics, ranked by historical popularity. Returns title, author, year, book_id, and drill-down routes for full-text retrieval. No license, no API key required.

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.

One unified source-first query for official China bank card offer documents. Select bank_code from the Bazaar input schema or /v1/supported-banks. Returns cleaned activity text, linked source resources, official source URLs, hashes, status labels and enrollment requirements; no recommendations or rankings.

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.

Chinese summary API for public URL or raw text. Returns summary + key_points + 3 actions JSON. $0.02 USDC per call. Lightweight fetch, no headless browser.

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.

Chunk a JSON array. Use to batch tool calls, page results, or stay under payload limits. Returns array chunks with the requested size (bounded input). $0.001 USDC per successful call via x402 on Base—deterministic first-party JSON, no API key, no subscription, and nothing is billed on structured validation errors.

Chunk a list into fixed-size batches. Call when you plan batch POSTs under payload ceilings. Returns chunks array and count for $0.001 USDC via x402 on Base. No network, no keys, no retention; first-party local JSON only. Results are advisory; the caller owns budgets, auth, and production controls.

CI/error log triage: paste a failing build or runtime log. Returns ordered diagnosis, likely root cause, and concrete fix steps. Rebuy on every new failure. Dual-rail USDC (Base + Algorand).

CitationVerifier evidence extraction: extract factual evidence, quotations, dates, names, organizations, and numbers from a source

Verify AI-generated claims against a public HTTPS web source and receive a signed evidence receipt.

Verify AI-generated claims against a public HTTPS PDF and receive a signed evidence receipt.

Retrieves investor relations

Timeseries sentiment for entities and assets

Retrieves insider transactions

Retrieve news and content text, metadata, and analytics

Claim-denial intelligence for a CARC code (e.g. CO-50, PR-204, CO-197). Returns plain-English meaning, category, whether it is appealable, the concrete next action, and how to prevent it. Unknown codes still get group-level (CO/PR/OA/PI) guidance. (AutomatedRCM agent: Dex)

CTI claim reliability scoring, grounded in Meng et al. (arXiv:2509.23573, Feb 2026). Pass claim=<text>, optionally actor= and/or cve_id= to ground against intel.db. Classifies the claim against three failure modes — spurious correlation, contradictory knowledge, constrained generalization — and returns a reliability score, verdict, and evidence. The confidence layer threat-score/dossier/report don't expose.

Clamp a number between min and max for $0.001 USDC. Call when you need this bounded result without an API key or subscription. Returns machine-readable JSON via x402 on Base or Solana. Limitation: results cover only the supplied input or one bounded public endpoint at request time; callers must verify before acting.

Clamp a probability into (eps, 1−eps) for stable odds/math. Call when preventing 0/1 probs from blowing up logs and odds. Returns clamped probability as deterministic JSON for $0.001 USDC via x402 on Base. First-party local math only—no RPC, live market feed, API keys, storage, or mediagen. Advisory only; the caller owns capital, risk, and production controls.

Clamp an integer into an inclusive min/max range — first-party local utility for agent preflight and proven micro-utils expansion. Returns deterministic machine-readable JSON for $0.001 USDC via x402 on Base. Execution is first-party, local-only, stateless, and memory-only with no paid upstream, no input retention, no web search, no live RPC, and no mediagen. Results are advisory; the caller owns authorization, budgets, and production controls. Sibling of Delx routes that already converted exte…

Clanker Banker llm-pack: URL→token-budgeted LLM-ready markdown for AI agents. html-to-markdown, web scrape offload, RAG ingest pack. ~$0.005 USDC Base x402. Pay-to-probe on /v1/inspect|/v1/resolve. Quote: GET /v1/quote?tool=llm-pack.

Classic CPMM impermanent loss from price ratio. Call when LP risk before providing liquidity. Returns il_fraction and il_pct as deterministic JSON for $0.001 USDC via x402 on Base. First-party local math only—no RPC, live market feed, API keys, storage, or mediagen. Advisory only; the caller owns capital, risk, and production controls.

Curated shelf of enduring public-domain classic novels and literary works, ranked by historical popularity. Returns title, author, year, book_id, and drill-down routes for full-text retrieval. No license, no API key — every book is public domain in the USA.

Classify bounded text into exactly one caller-supplied label and return a short evidence-grounded rationale. Use constitutes acceptance of https://diem-agent-workers.vercel.app/terms.