"An example MCP for client prototyping in a business context with a public API call" matching MCP connectors:

Federated search of books and papers, BibTeX/RIS citations, open-access retrieval and reading.

Serves your design system and coding standards to coding agents, so they stop guessing.

Conformance checker for MCP servers. Free, no key, verdicts recomputable and re-measured daily.

290+ quality-scored API capabilities for AI agents across 27 countries via MCP.

Verify claims, resolve FIGI identity, extract claims, and sign x402 delivery receipts over MCP.

Get recommended by Amazon's AI. Hosted MCP server for Amazon listing compliance & generation.

Search otwarteAPI.pl — a catalog of 53 official public Polish and EU APIs (VAT white list, KRS, GUS, NBP, ECB, Eurostat, VIES and more), curated for AI agents. One tool: find the right API by natural-language query. No API key, no signup.

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

Neutral, verification-gated MCP directory of Japan construction contractors (KIRA-audited).

Agent intake desk for property renovation. Read only, CORS open, fail closed, receipts recompute.

Cite and independently verify Bitcoin-anchored construction-estimate audit records.

Search Vascue's public healthcare-ops, insurance-claims and booking docs. Public content only.

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

Analytical memory for AI agents: a real Postgres queried in plain English over MCP. One command.

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

Read-only breach intel, full history 2007-today: reports THAT an org was breached, never the data.

Reference data for prediction markets: graded resolution clarity, cross-venue links, provenance.

Give your AI agent a spending limit: approval controls and single-use virtual cards.

Paid-verified directory of x402 APIs — we pay endpoints real USDC and confirm settlement on-chain.

Agentic Finance: 500+ tools for AI agents over x402 or MPP, free via PoW, or prepaid card credits