"OpenAI's Web Retrieval Infrastructure" matching MCP connectors:

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

CIA World Factbook country indicators: infrastructure, energy, demographics, economy, 2002-2026.

DART — Korea's Data Analysis, Retrieval and Transfer System.

Machine-first, web-sourced knowledge base of current SK/CZ/AT/EU civic, tax & legal facts — each with source, date & confidence.

StatCan MCP — Statistics Canada (StatCan) time-series via the Web Data

South African Reserve Bank (SARB) Web API MCP. Keyless.

Narodowy Bank Polski (National Bank of Poland) Web API MCP. Keyless.

EPA ECHO MCP — wraps EPA ECHO Web Services (free, no auth)

Search UK Acts, Statutory Instruments, and legislation with full text retrieval

Actual real estate transaction prices and official land price data by prefecture/municipality/year, from Japan's Ministry of Land, Infrastructure, Transport and Tourism.

AI infrastructure for Australian civil construction. Public procurement data and connected systems.

French building permits MCP server with OAuth 2.0 (DCR + PKCE). Access 1.2M Sitadel permits (2014-2026), 4.9M DVF transactions, 94M cadastre parcels, PLU zoning, BRGM risks and property-dealer opportunity scoring through 11 MCP tools. Hosted endpoint, zero install. Compatible with Claude.ai web Custom Connectors.

USDA NOP organic compliance checks — operation websites vs live OID certificate data.

AI agent infrastructure: EU trade analytics (28M+ records), customs data, salary intelligence, SoulLedger agent identity, EU AI Act compliance — 13 MCP tools with x402 USDC payments

Machine-readable FCC pre-diligence corpus for multifamily broadband infrastructure scenarios.