"Services or tools that don't require a separate API key" matching MCP connectors:

DXF and PDF/X-4 for AI agents: structured facts, PNG renders, an interactive in-chat viewer.

Read-only MCP server for the OrchestKit docs: full-text search + Markdown fetch. No auth.

AIOProductOS: revenue, feedback, work and analytics on one customer record. 71 tools, 3 apps.

530 MCP tools across 561 fintech tools: ChainGraph AP2 decisions, execution_hash. Zero PII.

Savvly MCP: query fund data, model projections, and compare against alternative retirement products.

Research-only MCP server that turns your AI into a quant research desk: describe any strategy in plain English, get a real backtest with institutional metrics and a verifiable audit bundle. No trades and your AI never writes the code, so it can't fool the numbers.

Reassign: a circular 24-hour calendar and time-tracking copilot with ADHD-friendly scheduling.

Agent-first onboarding to Smarter Weather: plans, docs, signup, API keys, MCP config, billing.

Search real hotels, get live per-night quotes, and check out — all in chat. Guest search and checkout-link tools need no sign-in; OAuth unlocks saved trips, booking management, and one-click checkout. Renders interactive results, hotel-detail, and checkout widgets.

OneHaus household tools: tasks, calendar, contacts, pets, vehicles, documents and more.

The Apiosk MCP lets AI agents discover, pay for, execute, and publish APIs through the Apiosk gateway. It is a machine endpoint, not a website, so connect it from an MCP client (Claude, Cursor, ChatGPT, and others) rather than browsing it here.

Product search and price comparison for AI agents. Search 100M+ products across thousands of retailers by text or image, compare live offers and prices, and turn any merchant URL into structured product data. No API key required to start; add one for unlimited use and affiliate commission.

Score any URL against a real design contract — 40 checks, A-F grade, token + motion validation.

Generate and edit images, videos, and audio with 150+ models from 20+ vendors.

Deterministic, fully editable PowerPoint from typed slide intents. 150+ layouts, brand templates.

Read-only fantasy analysis for ESPN, Yahoo, and Sleeper leagues via MCP

Send a shoot's worth of scripts to the Daily Studio teleprompter on iPhone, in one link.

In-flight WiFi: provider by flight, airline or tail, measured speeds, Starlink rollout.

Search and get install details on MCP servers, right from your agent -- a unified marketplace index.

AI fantasy football draft assistant — 2026 board, best available, sleepers, ADP gaps. Who to draft?