Agentum Entity Resolver

Agentum — Global Corporate Entity, VAT & Sanctions Resolver for AI Agents

Registry availability depends on the server configuration. UK Companies House is verified locally; hosted UK access is not yet confirmed. Australian ABR and New Zealand NZBN are disabled without credentials; Japan NTA is pending approval. GLEIF lookup can still return LEI holders in these countries. Check /v1/coverage for the connected server’s current registry coverage.

Zero-Signup Streamable HTTP MCP Server & REST API for deterministic corporate entity resolution across global national registries (UK Companies House, Swiss ZEFIX, Singapore ACRA, US SEC EDGAR, European Registries, and Worldwide GLEIF LEI), live EU Commission VIES VAT validation, and OFAC SDN + EU Financial Sanctions + UN Security Council screening (26,650+ live records).

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Agent Discovery & Platform Connection

1. Anthropic Claude (Claude Code, Desktop & Web)

• Claude Code CLI:

  claude mcp add --transport http agentum https://agentum.asimplek.cloud/mcp

• Claude Plugin Marketplace: Sync directly from GitHub: Algiras/agentum-skills. The .claude-plugin/marketplace.json manifest installs the agentum-entity-resolver plugin automatically.

2. OpenAI ChatGPT

• Custom MCP Server / Actions: Go to ChatGPT Settings → Plugins / Custom MCP Servers → Add Server:
• Server URL: https://agentum.asimplek.cloud/mcp
• Auth: OAuth 2.1 auto-negotiation (https://agentum.asimplek.cloud/oauth/authorize) or None.
• Manifest Discovery: https://agentum.asimplek.cloud/.well-known/ai-plugin.json

3. Mistral AI (Le Chat)

• Custom Connectors: Go to Mistral Le Chat → Workspace Connections → Add Connector:
• URL: https://agentum.asimplek.cloud/mcp
• Transport: Streamable HTTP / Server-Sent Events (SSE)
• Skills CLI:

  npx skills add Algiras/agentum-skills

4. Google Gemini & Antigravity

• Gemini CLI Extension:

  gemini extension install Algiras/agentum-skills

*(Uses gemini-extension.json and GEMINI.md system context)*

5. Cursor IDE & Generic MCP Clients

Add to .mcp.json or claude_desktop_config.json:

{

"mcpServers": { "agentum": { "type": "http", "url": "https://agentum.asimplek.cloud/mcp" } } }

6. Autonomous Agent-to-Agent (A2A) & Protocol Registries

Autonomous agents can discover and inspect capabilities programmatically via well-known schemas:

• A2A Agent Card: https://agentum.asimplek.cloud/.well-known/agent.json
• MCP Server Card: https://agentum.asimplek.cloud/.well-known/mcp/server-card
• Coinbase x402 Bazaar (Base USDC): https://agentum.asimplek.cloud/.well-known/x402.json
• Stripe / Tempo MPP Registry: https://agentum.asimplek.cloud/.well-known/mpp.json
• OpenAPI 3.1 Spec: https://agentum.asimplek.cloud/openapi.json
• LLM Scraper Guide: https://agentum.asimplek.cloud/llms.txt & https://agentum.asimplek.cloud/llms-full.txt

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Tools & Micropayments (Dual-402)

Every caller receives 5 free calls per day automatically (tracked by X-Agent-Id or IP). Beyond the free quota, calls return an HTTP 402 Payment Required response with challenges for both rails:

1. Coinbase x402 v2: Native settlement in USDC on Base (base-mainnet or base-sepolia).
2. Stripe / Tempo Machine Payments Protocol (MPP): Standard Payment challenge header with instant receipt issuance.

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Full MCP 2025-03-26 Protocol Suite

• Streamable HTTP Transport: Full SSE streaming on GET /mcp, batch JSON-RPC support on POST /mcp, session termination on DELETE /mcp.
• Tools with Compact Optimization: Supports _meta.compact: true returning token-saving summaries alongside deep-link resource URIs (agentum://results/{requestId}).
• Dynamic Resources:
• agentum://entity/{query} & agentum://entity/{query}/compact
• agentum://vat/{vatNumber}
• agentum://sanctions/{name}
• agentum://results/{requestId}
• agentum://pricing, agentum://jurisdictions
• Prompts: kyb_due_diligence_report, sanctions_escalation_review, vendor_onboarding_check.
• Interactive Elicitation & Sampling: Inline _meta.elicitation for schema-driven human/agent payment authorization, and _meta.samplingRequest for AI sanctions adjudication.

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License

MIT © 2026 Algimantas Krasauskas / Agentum