"Guide to Using LangChain Correctly" matching MCP servers:

Enables querying SINTEGRA TO (state tax information) through a read-only MCP server, using natural language.

Enables users to query IPVA (vehicle property tax) data from the official SEFAZ TO source via a read-only MCP tool.

AI-powered expense tracking MCP server that connects LLM clients to PostgreSQL for natural language expense management.

Synthetic MCP server that demonstrates retirement guidance capabilities including member profile, super balance, projections, insurance, and adviser booking for a ChatGPT connector demo.

agentcentral is a hosted MCP server for Amazon sellers that connects Claude, ChatGPT, and other AI clients to Amazon Ads, Seller Central, inventory, orders, catalog, rankings, finance, and fulfillment data. It provides fast reads from pre-materialized Amazon data, scoped API keys, OAuth-based Amazon connections, encrypted tokens, per-tenant isolation, and guarded write tools with audit log

Provides real-time financial data including stock quotes, news, and market movers through a secure FastMCP gateway, enabling conversational finance queries.

Exposes 26 structured analytical tools over Climate Finance Update datasets, enabling fund-level financial analysis, portfolio aggregations, and data quality diagnostics without requiring the client to write data access code.

Enables MCP clients to automate the complete SAP Business One sales cycle, from quotations and orders through deliveries, invoicing, incoming payments, and collections via Service Layer.

Enables consulting the Receita Federal Simei MEI for issuing installment guides, using an official source. Read-only MCP server with a single tool for querying Brazilian MEI payment guide information.

MCP server for querying FGTS quick guide issuance from official sources. Provides read-only access to FGTS guide data with pay-per-use pricing and works with any MCP-compatible client.

Enables querying DETRAN PB payment guide information from official sources via a single read-only tool.

Read-only MCP server for querying DPVAT (Brazilian insurance) guide issuance information from an official source. It provides a single tool that allows users to consult DPVAT guide data via natural language in any MCP-compatible client.

Enables querying DETRAN RJ's tax regularization guide from official sources via a read-only MCP tool, with prepaid per-query billing.

Enables authenticated access to Amazon India SP-API commerce intelligence and controlled operations, including orders, finances, listings, pricing, reports, sales/traffic metrics, and profit analysis. It also supports gated Amazon mutations through preview, approval, and execution workflows with audit logging.

Enables AI agents to query US public company financial data from SEC filings, with tools for resolving tickers, listing filings, retrieving financial concepts, comparing companies, extracting filing sections, and full-text search. It surfaces data ambiguities like tag variations, restatements, and fiscal-year misalignment rather than hiding them.

Provides read-only tools to query live Polymarket prediction-market data via the public Gamma API, enabling search, browsing, and detailed market and event information.

Deterministic US equity-compensation tax optimizer. Six tools cover ISO/AMT exercise scheduling, NSO sell-vs-hold, RSU vest-and-sell, single-stock concentration, protective put / zero-cost collar pricing, and Section 1202 QSBS qualification. Federal plus 50-state plus DC tax math.

MCP server providing deterministic cost anomaly detection for cloud billing and auditable architecture risk scoring, enabling AI agents to identify waste and risk with explainable rules.

Enables AI coding tools to access real-time and historical currency exchange rates for 160+ currencies, sourced from Reuters/Refinitiv.

A read-only MCP server for EdgeDepth's market microstructure search engine, enabling users to query recorded crypto and TradFi perpetuals for market conditions, outcomes, and reproducibility-keyed evidence directly from MCP clients.