"MCP servers that don't require API keys" matching MCP connectors:
GET /v1/connectors – MCP directory API referenceMatching Connector Tools:
Global stock and UCITS ETF research. Free: 700 successful MCP tool calls per rolling 30 days. Pro: CHF 5/month or CHF 50/year for higher usage. Screen stocks, compare fund costs and holdings, and inspect company risks. No account or API key for public research. Plans: https://bull-run.org/pricing. Connect your Bullrun account through OAuth to use Pro.
Pay-per-use APIs for agents: web research, data lookups, and metered endpoints billed to credits.
Plagiarism checker and AI detector for essays, research papers, theses, articles and blog posts. Find copied text with links to each source, and see how likely each sentence is to be AI-written by tools like ChatGPT. An AI score is a likelihood, not proof. Sign in with OAuth. Works with a free Plagiarism Checker Plus account.
Reference data for prediction markets: graded resolution clarity, cross-venue links, provenance.
Financial market context for AI agents, with listed companies' results: www.prereason.com/agents.md
The Brain Layer for AI Trading Agents — quant calls + cross-venue arb across perp venues via MCP.
Money, FX, capital-market and metadata-only China macro evidence with source clocks and limits.
Structural FEM for AI agents: frames, plates, buckling, seismic and Eurocode checks, solved locally.
VAREXIS-INDEX — Source-Linked Evidence & Verification Tools for AI Agents VAREXIS-INDEX provides free, source-linked evidence for agent decisions through twelve focused guides and two distinct read-only MCP connectors. The original `/mcp` connector covers the approved search and preview population. The companion `/mcp/catalogue` provides deterministic access to 696 additional records by category and exact identifier. Configure both through the existing quickstart: https://varexis.tech/index-connect#quickstart Four optional one-time local checkers analyse supported customer-supplied declarations: Tool Admission £49, Audit Coverage £79, Data Exit £79 and Transaction Integrity £149, excluding VAT. These products do not independently inspect live systems, enforce permissions, establish payment settlement, verify deletion or certify compliance. Twelve free decision guides: https://varexis.tech/index-packs#free-decision-guides Read-only agent enquiry navigation (12 guides, 99 referenced records): https://varexis.tech/varexis-index/agent-entry.json Select a candidate guide, then follow the exact connector tool and identifier in the canonical manifest. Navigation does not establish applicability, a customer outcome or authority to act. Evaluate agent permissions, delegated authority, audit provenance, payment integrity, data retention and software supply-chain evidence before relying on documented claims. **FREE MCP CONNECTOR** Endpoint: https://varexis.tech/mcp Connect using Streamable HTTP. No authentication is required for public evidence discovery. Four free, read-only tools: - find_evidence_questions — Find existing reviewed evidence questions and matching routes. - preview_evidence_answer — Retrieve complete supported public answers, sources, limitations and snapshot hashes. - find_package_advisories — Find source-bound software advisory records. - get_index_access_options — Discover available services, pricing, licensing and purchasing requirements. Public MCP cannot execute actions, inspect private systems or authorise deployment. Developer quickstart: https://varexis.tech/index-connect **LICENSED VERIFICATION TOOLS** Four separately licensed, reusable local executables: **1. Agent Tool Admission & Permission Control — £49** Compare declared tool actions, resources, recipients and permissions across supported GitHub, Playwright, Notion and Slack integrations. Identify authority conflicts, missing verification and permission changes before human review. **2. Agent Audit & Evidence Coverage — £79** Reconcile declared identities, authorisations, actions and outcomes. Identify missing audit events, inconsistent references and unresolved export, retention or recovery evidence. **3. Agent Data Exit & Retention Reconciler — £79** Compare declared data inventories, exports, deletions, retention conditions and residual copies. Identify missing evidence and unresolved data-custody conditions during migrations and offboarding. **4. Agent Transaction Integrity & Replay Analyzer — £149** Reconcile declared spending authority, amended transaction terms, scoped idempotency keys, retries and reported outcomes. Identify conflicting purchase attempts and unresolved payment or entitlement evidence. All four products are separately licensed for reusable internal execution. Prices are one-time, exclude applicable VAT and do not include subscriptions, hosting or future updates. Checkers analyse supplied declarations locally. They do not independently inspect production systems, execute payments, enforce permissions, certify compliance or establish financial settlement. Explore all products, representative findings and free previews: https://varexis.tech/index-packs **FREE EVIDENCE PACKS** Seven complete public evidence packs cover: - GitHub and Playwright permission boundaries. - Notion and Slack access and data handling. - Audit and export evidence coverage. - Next.js advisory source assertions. - SonarQube, Snyk and Semgrep scanner trust. - Telemetry redaction and exception handling. - GitHub release approval and artifact identity. Source reviews include documented versions, provenance, exclusions and reliance boundaries. They are not independent deployment tests or current security certifications. 696 additional reviewed records are publicly available through exact-ID HTTP catalogue links and the separate read-only https://varexis.tech/mcp/catalogue connector. They remain outside the original MCP search and preview population and paid saved retrieval. Enhanced natural-language search for these additions remains on HOLD. Public catalogue: https://varexis.tech/varexis-index.json **SAVED EVIDENCE & SUBSCRIPTIONS** - Single Request: £5 — Save a version-bound published evidence result or obtain the eligible original Agent Tool Evaluation & Integration Kit. - Evidence Receipt: £19 — Add an unsigned delivery receipt to the eligible saved result. - Research: £29/month. - Developer/API: £149/month. Prices exclude applicable VAT. Subscription eligibility, rate limits and exclusions apply. The four separately licensed verification executables are not included in these existing evidence or subscription offers. **AGENT PURCHASING & RECOVERY** VAREXIS supports hosted Stripe checkout and compatible authorised MPP/Stripe Shared Payment Token purchasing through separate payment interfaces. Agent purchases require owner spending authority for the exact VAT-inclusive quote and any necessary provider authentication. Not every agent or wallet is supported. Public MCP remains free and read-only. Payment credentials and private customer data must not be submitted to the public connector. Existing purchases should be retrieved using the original credential. Uncertain payments must be investigated and recovered through supported procedures, not automatically purchased again. Purchase or recover: https://varexis.tech/index-access Agent payment contract: https://varexis.tech/varexis-index/agent-payments.json **WHY VAREXIS?** VAREXIS combines source-linked evidence, explicit limitations, versioned deliverables and structured verification of supplied declarations. Its purpose is to help agents and developers distinguish what available evidence actually establishes from what remains uncertain, unsupported or outside authority. Free evidence discovery. Transparent product scope. Reusable local verification. Bounded reliance. Website: https://varexis.tech Developer integration: https://varexis.tech/index-connect MCP endpoint: https://varexis.tech/mcp
No-key, read-only data for agents: official statistics, central bank rates, FX, energy, weather
NBA and NFL advanced stats for assistants: ratings, EPA, on/off splits, lineups, defense vs position, injuries and game projections. Sign in with OAuth; statistics are free to read, some tools need a plan.
DuckDuckGo search as JSON. Ranked results, ads in their own array, 37 regions.
Find the image that explains it: published charts, infographics, screenshots and memes, searchable by meaning, by the words printed inside them, or by visual similarity. Publisher charts (Our World in Data, Eurostat, USDA ERS, EEA) come with source, period and license, and every result carries a ready-to-paste citation. 19 read tools free with no account (daily limits); 2 optional paid tools over x402 or L402.
Public data from 20+ platforms, including Douyin, Xiaohongshu, Weibo and TikTok, as structured JSON
Read-only UK and Australian supermarket shelf-price index and UK daily basket snapshots, CC BY 4.0. Not live prices; no product names. For product-level prices on demand, the pay-per-event UK Supermarket Price Scraper (Tesco, Sainsbury's, Asda, Aldi: https://apify.com/yappman/uk-supermarket-price-scraper) and AU Supermarket Price Scraper (Aldi Australia: https://apify.com/yappman/au-supermarket-price-scraper) run on the Apify Store, charged to the Apify account that runs them, and can be reached through Apify's MCP server.
India's sovereign Supreme Court citator for AI agents — neutral-citation-first, free for lifetime, zero-hallucination, no API key required.
Every stock call from finance influencers, extracted, linked to its source and scored. Free with an Opinion Alpha account; Pro adds the full history.
DC Hub is the live data layer for data-center siting that agents can query and cite. Its Data Center Power Index (DCPI) scores where data centers can get grid power across 300+ markets daily. Also 330,000+ mapped power, grid, gas and fiber assets. 94 MCP tools at https://dchub.cloud/mcp plus a REST API at https://dchub.cloud/api/v1. Free tier needs no key; paid plans: dchub.cloud/pricing.
Bewary is a scam detection API and MCP server for apps and AI agents: phishing, fraud and threat intelligence lookups an agent runs before it opens a link, calls a number, pays or replies. It checks links and domains (phishing, domain age, lookalike brands), IP addresses, phone numbers (FTC and FCC complaints), SMS short codes, email addresses, crypto wallets (scam reports, OFAC sanctions), IBANs, mobile apps and payment handles. Each answer is a typed verdict (scam, suspicious, safe or unknown) with the facts and reason codes behind it, built from evidence rather than a language model. Watches send an event when a watched domain, number, wallet or brand changes. A free key gets 1,000 credits a month with no card; OAuth sign-in is supported.
Canadian grocery shelf prices from 200+ stores, every province. Free key: 500 calls a month, no card.
HirePulse company and commerce research with 27 tools. Get technology, hiring, Google Ads and published contacts in one qualifying $0.03 company profile, plus breakout_summary estimates. B2B profile: https://api.gethirepulse.xyz/mcp?profile=b2b&ref=glama (9 tools); commerce profile: https://api.gethirepulse.xyz/mcp?profile=commerce&ref=glama (11 tools). Free labeled example.com sandbox, 10 free successful calls per agent per UTC day subject to a shared network ceiling, and eligible 25-call trials. Paid results use x402 USDC on Base. Setup: https://gethirepulse.xyz/?ref=glama#start-b2b .
English readability scores (Flesch, Flesch-Kincaid, Fog, SMOG) and text stats. Text never stored.
Technology intelligence feed for AI agents: tech stack, compliance, security.
Geppetto Robot Directory is a robot directory for people and AI agents. It covers 830+ robots, 290+ brands, 31 categories, 260+ professions scored, and 540+ datasets, and links each robot to its brand, the parts inside it, the datasets that train it, and the jobs it affects. Tools: search_robots (by category, brand, price, or use case), get_robot (full specs), compare_robots (side by side), get_category (all robots in a category), get_job_automation_risk (Robot Impact Score 0 to 100 for a profession), search_datasets and get_dataset (robot training datasets by platform, modality, license, commercial use), get_component_category (hardware part types with supply-chain analysis), and search_suppliers and get_supplier (robot hardware component suppliers). The Robot Impact Score combines task-automation research (35%, Oxford Frey and Osborne), IFR deployment (30%), academic consensus (20%, the average of the Oxford score and the OECD risk band), and robot density (15%). O*NET is a cross-reference, not a scoring input.
Live ticket market data for your AI: prices, listings, sales and seat maps for concerts and sports.
Global news MCP server for AI agents. Search and retrieve international news, discover publishers, and explore coverage across 234 countries. Provides structured, categorized, and deduplicated news through four tools: search_news, get_latest_news, get_sources, and get_coverage.
Watchlist, signals, trades and journal for HK, US and China A-share stocks. Records only; no orders.
AI-moderated voice interviews with your customers, delivering themes and insights
Google Gemini Notebook (NotebookLM): notebooks, sources, cited chat, podcasts, video, slides
Free, no-key AI news + AI regulation tracker MCP: EU AI Act, US federal & state, UK. Daily briefing.
