"Search for free open-source software" matching MCP connectors:
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Search Kurodyne's digital product marketplace directly from your AI assistant. Discover products, compare prices and reviews, and explore the details to find something useful for your next project.
Free market data for AI agents through one MCP URL: 48 tools covering stock, ETF, index and crypto quotes, OHLCV candles, options chains with greeks, commodities and FX, SEC filings and XBRL financial statements, insider and institutional holdings, analyst estimates, earnings calendar, ETF holdings, DeFi and on-chain metrics, and 800,000+ US and international macro series. Every quote carries its timestamp and delay. Works with Claude, ChatGPT, Gemini, Cursor and any MCP client. Free account, OA
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.
The free 9-part video course, Explore The Coin Daily Research, walks through setup and the full workflow — charts, comparisons, news and using the tools in ChatGPT or Claude: https://www.youtube.com/playlist?list=PLKY7CRxbV8Fc Ask your assistant for a chart and it arrives in the conversation — scrub Bitcoin's week, set an A-to-B range, and see the move in numbers. Pull funding, open interest, liquidations and order-book depth. Catch hourly regime shifts. Compare whole sectors, like DeFi against AI tokens. Follow source-linked news and ticker video coverage, or read the latest published Market Update with its chapters. Every figure is grounded in The Coin Daily's own research pipeline: widgets render exactly what was read, missing readings stay visible gaps, and nothing is invented. Editorial market commentary — not investment advice. No trading, wallets or payments, ever. Sign in with OAuth.
Currency rates, history from 1949, IMF PPP, and FX analytics for AI agents.
Registered agents sell what they measured, anyone buys: validated knowledge and signed datasets. No sign-in needed to connect: searching, dataset listings and free reads work anonymously. Sign in (OAuth) only for selling and account tools.
Read-only RS3 GE guide prices/history, optional reported buy/sell trades, buy-limit/alchemy facts, flip math and public hiscores. Search Wiki sources, list category members, and read structured monster/quest/drop facts. Guide prices lag activity; trades are not executable offers. Wiki article text requires reviewed revisions; other pages return links. Streamable HTTP; no account or API key. Independent Birdwell Labs project, unaffiliated with Jagex or the RuneScape Wiki.
Reference data for prediction markets: graded resolution clarity, cross-venue links, provenance.
Let your AI agent pay for APIs and data without handing it your money. In ChatGPT, Claude or Grok, the agent finds paid x402 APIs (with each seller's payout record from x402 Doctor) and asks to pay; you approve and sign each payment in your own wallet: MetaMask or Coinbase Wallet (USDC on Base), Phantom (USDC on Solana) or Xaman (RLUSD on the XRP Ledger). Fizzl checks every payment before you sign and every paid answer for hidden instructions. Fizzl never holds your keys. Free to start.
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.
Codes de parrainage vérifiés en France : bonus filleul et parrain, conditions, fiche source. Verified French referral codes (banks, crypto, energy, telecom, shopping): referee and referrer bonuses, conditions, last check date and official source page. Read-only, no account needed.
Scores for the largest companies in each market with no account. Sign in for analysis and screening.
Fair-price checks for Japanese renovation quotes, with sources and recomputable records.
Calculates German lawyers' fees under the RVG with the ONYST fee engine: fees, expenses and VAT with fee number, rate and calculation, values in dispute, and invoices for law firms in Germany. Sign in with an ONYST account. Results are a calculation, not legal advice.
Money, FX, capital-market and metadata-only China macro evidence with source clocks and limits.
A structured financial modeling layer for AI agents. Build, version, and audit financial models without drift, then export to Excel, from Claude or any MCP client. Learn more: https://layerz.cc/for-agents
Market data for agents: token prices, DeFi TVL and DEX volume, perp funding, FX, yields, SEC data.
Fair value, quality, uptrend and three buy rules for 40,000+ stocks, plus your watchlist and alerts.
Agent intake desk for property renovation. Read only, CORS open, fail closed, receipts recompute.
The Brain Layer for AI Trading Agents — quant calls + cross-venue arb across perp venues via MCP.
Pay-per-call x402 API for AI trading agents: pre-trade security checks, Polymarket & HIP-4 odds.
200+ x402 APIs for AI agents: official statistics, crypto prices, compliance and web tools.
Perp funding rates, open interest, futures basis, IV, liquidations, order books on 8 exchanges
Official statistics and economic data for agents, with source and licence per answer. No key.
Accounts receivable automation for Xero and QuickBooks Online, inside your AI assistant. Ask Claude, ChatGPT or any MCP client for a receivables summary, find customers and invoices, read the email and SMS replies your customers sent, and see what Paidnice sent or skipped. Ask why a reminder, late fee or statement did or did not go out, and update a customer's contact people straight into your ledger. Secure OAuth sign-in. One connection covers every organisation you tick, with Read or Read and Write access.
Peppol e-invoicing API for developers. Without an account: plan your integration, search the docs, check a test invoice against the Peppol rules and look up a Peppol receiver. With a free account: send sandbox test invoices and follow their delivery. Sandbox only.
Validate EU VAT numbers in VIES and check Peppol e-invoicing, with source and date on every fact
Korean company facts in English for AI agents: ~830 KOSPI-listed companies (DART profiles, KRW financials, recent filings) and ~110,000 corporate public procurement suppliers (12-month KONEPS contract awards), plus live National Tax Service business status checks. 4 tools, keyless, read-only.
Verify a company before your agent pays, onboards or contracts it. One call returns one verdict (ok / review / blocking / not found) from official public sources: US restricted-party lists (Consolidated Screening List incl. OFAC SDN, refreshed daily), UK Companies House, Canadian federal corporations, GLEIF legal entity status, and contractor licences in Québec (RBQ, RENA), Washington and Oregon. Also: npm/PyPI package safety check. Free tools: qc_contractor_check, qc_licence, pkg_check (daily quota). Paid tools: pay per call in USDC on Base (x402), no account.
Free compound interest, investment, retirement, CD, S&P 500 and DCA calculators in your chat, with charts you can change.
Paid APIs for agents (x402 index) + SEC filings, wallet risk, OFAC, EVM reads, agent memory, news
SnelStart MCP server for ChatGPT, Claude and any AI agent: create sales invoice, add relation, book entry, list open items and upload document in your own SnelStart account. Cotlet works in the account through your Cloud Browser, a real Chrome where you sign in to SnelStart yourself; Cotlet does not store your password and you need no SnelStart API key. About the official SnelStart API: Yes, but it is gated (checked 14 Oct 2026). SnelStart has a B2B API for software partners: you request a connection, get a development key and portal access, and a production integration for several users needs certification, OAuth, a webhook URL and at least five named customers. Setup and FAQ: https://cotlet.dev/integrations/snelstart-api-mcp-server
Knowify MCP server for ChatGPT, Claude and any AI agent: create job, create bid, create invoice, log time and get job cost report in your own Knowify account. Cotlet works in the account through your Cloud Browser, a real Chrome where you sign in to Knowify yourself; Cotlet does not store your password and you need no Knowify API key. About the official Knowify API: Knowify has no public REST API (checked 11 Oct 2026). Its official AI Connector (MCP) lets users with admin permissions ask questions about jobs, billing, labor and collections, and is read-only for now. Setup and FAQ: https://cotlet.dev/integrations/knowify-api-mcp-server
iFirma MCP server for ChatGPT, Claude and any AI agent: issue invoice, send invoice, send to KSeF, add cost and list unpaid invoices in your own iFirma account. Cotlet works in the account through your Cloud Browser, a real Chrome where you sign in to iFirma yourself; Cotlet does not store your password and you need no iFirma API key. About the official iFirma API: Yes. iFirma has a documented JSON API that issues invoices, lists them, records payments, sends them by email and to KSeF, and adds cost documents (checked 14 Oct 2026). Setup and FAQ: https://cotlet.dev/integrations/ifirma-api-mcp-server
Expensify MCP server for ChatGPT, Claude and any AI agent: create expense, attach receipt, create report, submit report and approve report in your own Expensify account. Cotlet works in the account through your Cloud Browser, a real Chrome where you sign in to Expensify yourself; Cotlet does not store your password and you need no Expensify API key. About the official Expensify API: Yes, but it is narrow (checked 14 Oct 2026). Expensify's Integration Server API creates expenses, creates reports (domain and policy admins, after enablement) and exports reports, with credentials you generate yourself. Setup and FAQ: https://cotlet.dev/integrations/expensify-api-mcp-server
Dext MCP server for ChatGPT, Claude and any AI agent: upload receipt, list items to review, edit extracted data, publish to ledger and export costs in your own Dext account. Cotlet works in the account through your Cloud Browser, a real Chrome where you sign in to Dext yourself; Cotlet does not store your password and you need no Dext API key. About the official Dext API: Dext has no public developer API and no API docs on dext.com, and no official MCP server (checked 14 Oct 2026). The only official connection is the Zapier app, with 3 triggers and 4 actions: it submits receipts and sales invoices, reads processed receipts and creates client accounts. Setup and FAQ: https://cotlet.dev/integrations/dext-api-mcp-server
Free demo of Fortunest: a sample multi-broker portfolio your AI can query. No account needed.
Onchain DeFi intelligence API for Base, payable per call with x402 (USDC). Live MCP tools: get_bot_status (Telegram bot health), get_market_stats (market snapshot), get_onchain_sales (proven revenue from live x402 routes). Built for agents that need verifiable onchain data — whale flow, signals, and sales evidence at $0.005/call.
Számlázz.hu MCP server for ChatGPT, Claude and any AI agent: issue invoice, cancel invoice, issue receipt, record payment and get invoice PDF in your own Számlázz.hu account. Cotlet works in the account through your Cloud Browser, a real Chrome where you sign in to Számlázz.hu yourself; Cotlet does not store your password and you need no Számlázz.hu API key. About the official Számlázz.hu API: Yes. Számlázz.hu has an official API called Számla Agent, in operation since 2010, that issues, reverses and queries invoices and records payments over HTTP with XML (checked 14 Oct 2026). Setup and FAQ: https://cotlet.dev/integrations/szamlazz-hu-api-mcp-server
SuiteDash MCP server for ChatGPT, Claude and any AI agent: create contact, create project, create invoice, add task and send portal message in your own SuiteDash account. Cotlet works in the account through your Cloud Browser, a real Chrome where you sign in to SuiteDash yourself; Cotlet does not store your password and you need no SuiteDash API key. About the official SuiteDash API: SuiteDash has a Secure API for Super Admins and Admins, with monthly call caps, but its Zapier app only covers contacts, companies, projects and tasks (checked 11 Oct 2026). No official endpoint or Zapier action creates invoices, records payments, sends portal messages or shares files. Setup and FAQ: https://cotlet.dev/integrations/suitedash-api-mcp-server
