"How to connect a backend project to MongoDB" matching MCP connectors:
GET /v1/connectors – MCP directory API referenceMatching Connector Tools:
Check an A2A agent before you delegate, or an MCP server's measured conduct. Free, no key.
Spin up a complete OpenCode development environment on any Linux box — one agent-driven workflow, six tools, zero secrets.
Pre-trade token safety check for AI agents. Simulates a sell before you buy, then returns one low/medium/high/unknown verdict with the signals behind it: sellability, buy/sell tax, liquidity depth, pair age, same-ticker impersonation, owner powers from bytecode. Ethereum, BSC, Base, Solana. Fail-closed - a check that cannot run answers unknown, never low. Publishes its own measured error rate with the benchmark harness in the repo. Free, no signup, no API key, MIT.
Public chauffeur information, policies and anonymous price previews for Munich and MUC. On explicit customer request, prepare a binding unpaid offer using email OR E.164 phone, without an account. Customers review bound terms and explicitly confirm in Samuelz checkout. Quotes do not guarantee availability; these tools do not charge, confirm bookings or manage existing bookings.
A complete color workflow over MCP: mix, convert, harmonize, measure, place, and remember palettes.
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.
Remote MCP server for crypto trading signals and the public ledger that scores them, losses included. Read tools: open signals, the signal ledger (matured wins and losses), signals cancelled by the BTC regime veto with the outcome they would have had, market snapshot and ticker for scanned Binance symbols, the scheduled BTC chart read, and news headlines. The public read tools work without a key. With a free API key from ribqa.com: your own bots and strategies, and rate-limited strategy backtests. No tool places, simulates or cancels an order. Free during beta.
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.
Argentine economic statistics sourced from official data (BCRA, INDEC, datos.gob.ar) as tools for AI agents: exchange rates, inflation, rates, reserves, activity, wages and trade. Search series, fetch history, projections with calibrated bands and the BCRA market consensus, weekly summary and release calendar. Independent project, not affiliated with any government agency. Free, attribution required.
Enterprise L402 data vending engine delivering real-time thermodynamic Bitcoin telemetry, Groth16 ZK-SNARK verification, Nostr P2P mesh consensus, and agent context grounding to autonomous AI swarms.
A decision model for the calls that don't have a right answer. The better option, with a reason.
An MCP server that allows an agent to find the vendor that a network interface MAC address is registered under and other information about the block like it's registered country, the registry type it is in, how many addresses are in it's block and a link with more information. Stateless MCP 2026-07-28 version support only.
Discover and pay for services from the Nevermined Catalog using a spend-capped budget.
Buyer-side fair-price checks for Japanese renovation quotes; cost data is on a separate server.
A portable knowledge-graph memory you pass in and get back. No database. 4 of 6 free.
Read-only discovery and bounded access to a finite market briefing with evidence boundaries.
Search and read Edgepedia, a free and growing encyclopedia with citations. No key.
Traffic exchange network for independent websites. Without a key: network size, member sites, membership check and exchange rules. With a personal key from the BarterBanner dashboard: your sites, per-campaign statistics with after-click data, reports and widget code — and, if the key allows, creating, editing, pausing and resuming campaigns.
Cocktails you can make from bottles you already have, full recipes, and the best next bottle to add.
Threat intel for AI agents: IOCs, CVEs (EPSS/KEV), wallet sanctions and age, domain and URL checks.
