Borglayer MCP

BorgLayer MCP

The official MCP server for the BorgLayer API. It lets AI agents manage domains end to end on a BorgLayer account — search and register domains, transfer domains in from another registrar, manage DNS, set registrant details, and form a US LLC — all behind one scoped, per-request API key, paid from a prepaid USDC account balance.

Endpoint: https://mcp.borglayer.com/mcp (Streamable HTTP)

How it works

A BorgLayer API key (blrk_…) is an account with a prepaid USDC balance. Actions that cost money — registering a domain, transferring one in, forming an LLC — debit that balance; if it's too low the API returns insufficient_balance with a "top up" message and charges nothing. Read actions (search, list, DNS read, quotes) are free. Every tool maps to one scoped /api/v1 endpoint, and the key only does what its scopes allow.

Tools

Read

• search_domains — search available domains, priced for your account
• list_domains — the domains registered on your account
• get_balance — your prepaid USDC balance (micro-USDC)
• list_chains — supported chains + stablecoins for funding, each with its verified escrow contract

Domains

• register_domain — register an available domain · debits balance · domains.register
• transfer_in_domain — transfer a domain in with its auth/EPP code (free for free ccTLDs; others add a year) · domains.transfer
• list_dns — a domain's DNS records · dns.read
• add_dns_record / delete_dns_record — edit DNS (A/AAAA/CNAME/MX/TXT/NS/SRV/CAA) · dns.write

Registrant (owner) details — country-code TLDs require real registrant data

• list_registrant_profiles · create_registrant_profile (registrant.write) · delete_registrant_profile

LLC formation

• formation_quote — price a US LLC / entity with optional EIN + BOI · formation.read
• create_formation — form the entity; debits balance then files · formation.write
• get_formation — status of a formation order by reference · formation.read

Buying a *listed* marketplace domain through on-chain escrow is a separate,

wallet-signed flow and is not part of this account API. Use the BorgLayer app

or web marketplace for escrow purchases.

Supported chains & stablecoins (for funding / escrow)

Authentication

Each agent supplies its own BorgLayer API key per request (Authorization: Bearer blrk_…). The server holds no secrets; all scopes and the prepaid-balance accounting are enforced server-side by the BorgLayer API. Get a key and top up its balance at borglayer.com.

Security

• No secrets stored; the caller's key is used per-request and never persisted.
• Fixed API base URL — no dynamic hosts (SSRF-safe).
• All inputs schema-validated before the request is made.
• Money-spending tools each require their own scope (domains.register, domains.transfer, formation.write) and are bounded by the account's prepaid balance, so an agent can never spend beyond what's funded.
• Dangerous operations that give a domain away — transferring a domain OUT (revealing its auth code) and account-to-account push — are intentionally not exposed by this server.

Links

• BorgLayer: https://borglayer.com
• API docs: https://borglayer.com/docs