"How to connect a backend project to MongoDB" matching MCP connectors:

DocForge turns documents into structured data. Upload a PDF, image, or Office file and get fielded JSON back with per-field confidence scores. 95 templates (invoices, receipts, bank statements, ID docs), custom JSON Schema mode, auto-detect, natural-language instructions. Keyless demo tool included. Free 7-day trial.

Search domain availability and pricing, straight from chat, then open a link to register.

A complete color workflow over MCP: mix, convert, harmonize, measure, and remember palettes.

Plain-English git via MCP: 22 tools to branch, commit, push, and tag. No git jargon.

Cello MCP server to launch and manage your User Referral and Partner program — for developers and growth teams.

Goal decomposition where every "done" is proven by evidence and checked by a judge.

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

rnv-color-mcp, a hosted color-workflow MCP server (Python, Streamable HTTP). Tools: mix (including Kubelka-Munk paint physics), convert between formats, generate harmonies, transform text case, and save/list/get named palettes. It resolves hex / CSS / custom brand color names and refuses unknown colors rather than guessing.

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

Provides a platform-agnostic specification of the technical features every decent website should have

Connect your espresso routine to your AI assistant. This MCP server allows LLMs to act as a personal coffee coach by accessing your shot logs, grinder settings, and active bean inventory. Use it to automatically calculate extraction adjustments, track remaining coffee supply, and lock in winning recipes directly from your chat session.

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.

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.

The PropelAuth Integration MCP Server helps you and your favorite AI agent integrate PropelAuth as quickly and easily as possible into your project. Whether you're integrating PropelAuth into your Next.js project or your FastAPI backend, the Integration MCP Server will ensure your AI agent has the best context possible for a successful integration.

Hosted MCP server to humanize AI text: tell scans, voice fingerprints, burstiness, rewrite checks.

Hosted MCP server for data analysis: CSV profiling, A/B tests, cohorts, funnels, trend forecasts.

Hosted MCP server to lint SKILL.md files: packaging checks, regex tests, JSON validation, diffs.

Deterministic date math agents get wrong, done in code over MCP: business_days adds and counts working days with holiday awareness, meeting_overlap finds shared windows across UTC offsets including half-hour zones, recurrence_expand generates concrete dates, with deadline_planner and sla_due in the premium tier. Every failure mode returns a structured error.

8 teaching persona and skill products plus computed classroom tools over MCP: readability_report runs a real Flesch-Kincaid analysis with leveling suggestions, grade_curve turns score lists into full distribution statistics, lesson_timer splits class periods, and get_free_skill loads any product's complete free gateway skill.

A fully free linter for agent skill files: lint_skill validates YAML frontmatter, structure, size budgets, and safety phrasing with a pass/fail verdict; packaging_check validates zip layout against marketplace rules; plus regex_test, json_validate, diff_texts, and cron_explain for skill authors. No license or account required.