MCP server

The full API is available as an MCP server over streamable HTTP:

https://laso.finance/mcp

The tools are generated from the live OpenAPI spec at runtime, so the tool set never drifts from the deployed API.

Connect

There's no key to paste. The first connection opens your browser so you can sign in and approve the agent (OAuth 2.1 with PKCE).

# Claude Code
claude mcp add --transport http opensolid https://laso.finance/mcp

# Hermes
hermes mcp add opensolid --url https://laso.finance/mcp --auth oauth

{ "mcpServers": { "opensolid": { "url": "https://laso.finance/mcp" } } }

Clients without OAuth can send an API key as Authorization: Bearer <key>.

What you get

Tools	Notes
One tool per API route: order_card, push_to_card, send_bank_payment, get_account_balance …	Names are the snake_case of each route's operationId
get_agent_wallet, create_agent_wallet, agent_wallet_transfer, pay_x402_endpoint	The managed-wallet calls, including paying any external x402 endpoint
search_docs	Searches the live agent docs

Paid tools settle from the managed wallet automatically, so you never build a payment header. Before the first paid call, check get_agent_wallet and fund it.

Events

The server supports MCP events. Subscribe to notification.created to be told about deposits, card issuance, refunds and balance changes, instead of polling.

Docs-only server

A second, credential-free server covers the documentation alone at https://docs.laso.finance/mcp. Use it to work out which call does a job before you hold a key.