"Search functionality without API key requirement" matching MCP connectors:

Access the latest technology news from NewTqnia.com through the Model Context Protocol. Search articles, retrieve structured news content, browse categories, tags, and timelines, and access authoritative technology reporting for AI assistants, research, and automation.

Teardrop is the native economic layer for AI agents, providing a robust suite of tools for multi-chain portfolio tracking, DeFi yield analysis, and gas estimation. It enables autonomous agents to securely find Web3 data and manage micro-payments on-chain with zero human intervention.

CatchAll is a web search API built for comprehensive event retrieval — not ranked results, but all matching records.

Cross-venue Polymarket+Kalshi arbitrage: resolution mismatch, void risk & settlement divergence.

Detect breaking changes, generate changelogs, diff, and validate OpenAPI specs.

Free platform to test MCP clients without installing anything. Create mock tools with dynamic templates, configurable delays, conditions (if/then), and response sequences. Supports JSON-RPC 2.0 over Streamable HTTP. Built-in text_echo and json_echo tools. Rate-limited tiers: anonymous (5 calls/min, 1 mock tool), registered (10 calls/min, 4 mock tools), premium (60 calls/min, unlimited). Zero setup — no install, no registration required. More info: https://www.testmcp.dev

Eligibility-first UK & EU grant discovery, inside ChatGPT and Claude. Checks eligibility before recommending, explains why each grant fits, and cites the funder's own page on every answer — with an honest "competition_risk: unknown" when the data isn't there. 6 tools: search, fetch, find_opportunities, should_apply, explain_opportunity, complete_profile. Transport: Streamable HTTP. Auth: OAuth 2.1 + PKCE. Free to install, no card required.

MCP server for GOV.UK — search, content retrieval, organisation lookup, and postcode resolution.

Pay-per-use tool API for AI agents. Free tier, x402 USDC micropayments, or API key.

Universal pay-per-call tool API for AI agents. Web search, price feeds, hive memory, LLM routing, code sandbox. Free tier (10 calls/day, no signup). x402 payments on Base + Solana.

Secureship MCP gives AI assistants access to a multi-carrier shipping API covering rate comparison, label generation, package tracking, pickup scheduling, address book management, shipment history, customs documents, and more — across carriers like UPS, FedEx, Purolator, Canpar, and others. Browse 150+ live endpoint schemas, parameters, and auth details — always current, never stale.

Barcode lookup, nutrition search, and product comparison for 3M+ crowd-sourced food products.

Your app's translations in Tolgee: search keys, create translations, trigger machine translation

Search Austrian federal and state law, court decisions, and the authentic Bundesgesetzblatt (RIS).

Search 14.5M Smithsonian Open Access objects, get CC0 images, find cross-collection connections.

Search bills, legislators, committees, and events across all 50 US states, DC, and 5 US territories.

Search USGS and EMSC seismic data — real-time feeds, event queries, and earthquake counts.

HTML-to-PDF MCP server — render pixel-faithful PDFs from HTML.

Fleet discovery for the cyanheads MCP ecosystem — semantic search + install snippets.

Decode VINs, search recalls, complaints, crash ratings, and investigations.