"How to handle REST APIs" matching MCP servers:

IBAN validation across 89 countries, BIC/SWIFT and Swiss clearing lookup, batch validation, payment-reference, postal-address and Swiss QR-bill checks for AI agents. Connect via MCP or the REST API. Includes free quotas, paid credits and a Pro subscription. SEPA and country-risk indicators support payment-data checks; they do not confirm account ownership or replace beneficiary AML/KYC screening.

Automates GSTR-1 filing through Sandbox.co APIs, enabling seamless integration with Claude Desktop or API for GST return submission.

Monitor taken usernames and get alerted the moment they free up or drop, so you can claim a handle before anyone else. Also checks live username availability across the major social platforms, domain availability across popular TLDs, and screens names for trademark conflicts.

MCP server that exposes the OBBBA No Tax on Tips federal deduction logic as callable tools, enabling users to check eligibility and estimate tip deductions.

Enables MCP-compatible AI agents to screen counterparties against government sanctions lists and fraud-cluster registries, check regulatory tradability across 235 jurisdictions, and run pre-deal compliance checks via OilFlow APIs, with three tools usable without an API key.

This MCP server enables searching and retrieving Romanian legislation from the Portal Legislativ database via its SOAP API, providing metadata and full text with verifiable citations.

Enables searching and verifying citations of Colombian Constitutional Court decisions using datos.gov.co open data, returning metadata such as magistrate, date, and relatoria URL.

An MCP server for accessing Turkish legislation (laws, regulations, decrees) via the Adalet Bakanligi API, providing search, full-text retrieval, and structured citations.

Enables access to Polish Constitutional Tribunal rulings, including search by keywords or case signature, listing recent decisions, and retrieving full judgment texts with metadata and official links. Supports section-wise and chunked retrieval of long documents to manage context budgets.

Enables legal research and analysis of Korean law through 42 National Law Information Center APIs exposed as 10 tools, including statute/precedent search, citation hallucination verification, precedent citator checks, law version comparisons, applicable law determination, and ordinance maintenance review.

Medicare claim documentation lookup for CPT codes against live CMS sources, returning structured requirements and document URIs with optional enrichment via RCI APIs.

Provides verification and utility APIs for AI agents to validate tax IDs, screen sanctions, verify companies, and inspect domains using prepaid USD credits, with no charge for failed checks.

Enables trademark clearance searches in Austria and the EU by querying official EUIPO APIs and TMview, generating search variants, deduplicating and scoring results, and providing consolidated findings with search logs and identified gaps for legal assessment.

Enables access to USPTO patent data through multiple APIs including patent search, prosecution history, PTAB proceedings, and patent litigation. Provides 52 tools across six data sources.

Enables AI agents to generate documents (PDF/DOCX/Factur-X) and manage electronic signatures (eIDAS/PAdES) via natural language using LayerOne's DocX and Sign APIs.

MCP server that enables searching Korean patents, trademarks, and designs via KIPRIS Plus open APIs. Supports keyword, advanced, applicant, and rightholder searches with detailed bibliographic lookup.

Japan Operations OS for AI agents — 14 knowledge domains covering regulations, protocols, calendar, travel, food culture, language, disaster safety, daily life, and persistent memory. 31 MCP tools via REST + Streamable HTTP.

Enables AI systems to search, retrieve, and analyze Korean legal information from the National Law Information API (law.go.kr), including laws, administrative rules, English translations, and law-ordinance linkages.

Enables Russian product marking verification via Chestny ZNAK/CRPT APIs, including authenticity checks, product details, batch checks, and authorized GTIN/CIS lookups.

Enables AI assistants to interact with Brazilian electronic invoices (NF-e, NFC-e, NFS-e) via Nuvem Fiscal API, including CNPJ lookup, invoice issuance, cancellation, and PDF generation.