"Answer" matching MCP connectors:
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Sanskrit scripture search: Mahabharata, Upanishads, Gita; cited verses, honest no-answer.
360 pay-per-call APIs for AI agents over x402 and MPP, settled in USDC on Base ($0.001-$0.25 a call, no account or API key). DeFi yields and market data, 10-chain wallet reads, wallet and token risk signals, sanctions screening, SEC financials, email/domain and web intelligence, AI text extraction, and signed proofs. Every answer names its sources and carries an evidence hash; a paid call that is not delivered is credited back. Built and run by UnyKorn LLC.
Measured share of answer for 24 crypto and Web3 brands. An open dataset, not an audit of your site.
Measured share of answer for 20 SaaS brands. An open dataset, not an audit of your site.
Oathlayer is an independent check on AI answers. It checks each answer against independent sources, gives it a clear verification tag, and records it with a permanent doc number that anyone can look up free at oathlayer.com/verify. It reports what happened; it does not judge right or wrong. Works on any topic and with any AI model. Tool: verify_output. Connect at https://mcp.oathlayer.com. The Five Pillars of Trust: Verification Successful - Oath Approved; Verification Threshold Not Met; Various Perspectives Apply; Complex Question - Threshold Reserved; Clarity Needed to Continue. Citation Checks: paste a case citation and Oathlayer checks it against official court sources. Each citation gets a short tag: Confirmed, Unofficial, Mismatched or Not found. If trusted sources report a case was overruled, it says Reported overruled. It checks the citation only, not whether the case supports your argument. Also available as Oathlayer Chat (no programming needed) and an API (oathlayer.com/docs). Free trial: 5 free verifications, no card needed (oathlayer.com/signup). Then pay as you go: one credit per check, credits valid 12 months, no subscriptions.
Cross-retailer product catalog: one scored answer per product with live prices and buy links.
An MCP server for Perigee, the open-source 3D viewer of the artificial objects orbiting the Earth, the Moon and Mars and of the spacecraft crossing the solar system. It lets an AI assistant (a teaching assistant, for example) answer questions such as “how far is Mars from the Earth on 1 December 2026?”, “where is the ISS now?” or “what is Lucy's mission?”, and hand the student a live 3D view, with how each number was obtained, from which data, how fresh and how accurate.
Liliphant joins your meetings and remembers the work across all of them. Most tools stop at one transcript. Liliphant connects every conversation, so you can ask what was decided, who promised what, what changed since the first meeting, or what's still blocked. Every answer comes with the exact quote, the speaker and the meeting it came from, and if something is unclear, Liliphant tells you. Open promises and unanswered questions stay in view until someone marks them done.
ICMR-NIN nutrition for 52 Indian foods: protein, targets by age, cost ranking. Every answer cited.
An open MCP server for the Portuguese housing market, run by flatin.pt. No API key, no registration, no rate-limit negotiation. Twelve tools: • imt_calculate — IMT and Imposto do Selo on a purchase, 2026 tables, including the reduced table, the relief for buyers aged 35 or under and the flat rate for non-residents • imi_rate / imi_annual_cost — the IMI rate of any of the 308 municipalities for 2023–2025, and the annual bill for a given VPT • construction_barometer — how many building-permit cases enter a town hall each month (our own indicator: monthly for three municipalities, annual for eight, method and revision policy published) • search_newbuilds / get_newbuild — 250 new developments, 53 municipalities, 71 developers, with stage and, where published, price • where_to_live / municipality_stats / compare_municipalities — municipal comparisons • glossary_lookup — Portuguese property and tax terms • request_consultation / subscribe_digest — reaching a human The data behind the tax tools is published as open data under CC BY 4.0 on the Portuguese national portal (dados.gov.pt) and archived on Zenodo with a permanent DOI. Anyone may reuse it. Humans, not bots, answer the people who get in touch: a home purchase involves personal data under the GDPR and decisions that cannot be refunded.
Free, cited reference data for US law-firm marketing: lawyer advertising rules for all 50 states and DC, bar ad-filing fees, contingency fee caps, ethics opinions (incl. AI), ad-platform policies, federal MDL dockets, federal civil filings, statutes of limitations, law-office competition and legal deserts by county, lawyer wages, fatal crashes, CFPB, EEOC and FCC complaint data. Every answer carries its source, DOI and the date it was checked. Main server: 24 tools; one more server per dataset at /mcp/<dataset>. Read-only, no sign-in, CC BY 4.0. Published by Probative Growth, a marketing agency for law firms. Not legal advice.
Check UK tenancy and employment rules from the facts you give: deposit caps, notice periods, section 13 rent increase notices, statutory notice, holiday entitlement and the minimum wage, for England, Wales, Scotland and Northern Ireland. Each answer names the law it applies and links to more detail. It can also link you to a full review of your tenancy agreement or employment contract. Read-only, with no account or sign-in. General information, not legal advice.
A decision model for the calls that don't have a right answer. The better option, with a reason.
Causal analytics: ask a business question, get a deterministic causal answer and charts.
See how often AI answers name and link your brand, which rivals they name and which sites they cite.
Economic and social data for 298 countries and regions: 754 indicators in 10 categories — macroeconomics, financial markets, labor, demographics, real estate, commodities and energy, transport, healthcare, education and technology. Sources include the World Bank, IMF, FRED, OECD and WHO. Every answer carries the source, the licence and a link to the EconDash chart; IMF and other forecasts are labelled and kept apart from observed values. Five read-only tools, no sign-in.
Say what your agent needs: Fizzl buys the right paid x402 API, checks the answer. Free pick.
OptimistFi gives AI assistants live perpetual futures data across 40 venues: funding on every venue, open interest, leverage and liquidation levels, whale trades, order-book depth and the net position of Hyperliquid's largest accounts, with up to 90 days of history. It also covers the rules and live challenge prices of 21 perps prop firms, and a dated, SEC-sourced investment thesis for more than 6,100 US stocks. Public and read-only: no key, no sign-up. Every answer names its source and time.
Search Fragments — two tools for the queries an agent can't place, both built to decline rather than guess. resolve_fragment takes a half-remembered, cross-source query ("a musician who became famous for stopping performing") and returns a grounded answer, ranked web sources to confirm by eye, or an explicit no-resolution. verify_claim takes a specific factual assertion and returns supported, partially_supported, insufficient_evidence, or unsupported, with cited evidence and a stated_limits field that is always present. There is no confidence score — insufficient_evidence fires freely, and unsupported requires a source that explicitly contradicts, never mere absence of confirmation. Every verdict is decide-by-eye: "supported" means current web sources confirm it, not that the claim is true. Calibrated against 18 known claims before release. Free, no signup. Streamable HTTP (MCP 2025-11-25). Read-only.
Public Q&A board where AI agents post questions they are stuck on and other agents answer.
