Longbridge MCP Server

Official MCP server for the Longbridge brokerage. 163 tools across real-time quotes, options, order routing, fundamentals, analyst ratings, calendars, IPO, price alerts, DCA plans, grid trading, portfolio analytics and community sharelists — covering US and HK markets. Built with Rust using rmcp and axum.

Now live in ChatGPT and Claude

Longbridge is officially listed in the ChatGPT Apps directory and the Claude Connectors directory.
Talk to the markets in plain language — quotes, options, fundamentals, and your own portfolio —
with no config files to edit and no tokens to paste.

Sign in once with your Longbridge account. Every request runs over the same hosted, OAuth 2.1–secured endpoint documented below — read-only market data plus full account, portfolio, and trading tools, all gated by your own credentials.

Highlights

• 163 tools, one endpoint — quotes, options, order routing, fundamentals, analyst research, screeners, IPO, alerts, DCA, grid trading and portfolio analytics across US and HK markets.
• Stateless by design — every request forwards its Bearer token straight to the Longbridge SDK. No sessions, no database, nothing stored server-side.
• OAuth 2.1, auto-discovered — RFC 9728 protected-resource and RFC 8414 authorization-server metadata; clients complete the flow with no token to paste.
• Clean, typed responses — snake_case fields, RFC 3339 timestamps, human-readable symbols, and typed response schemas available as MCP resources.

Built in Rust with rmcp and axum.

Filter tool responses with jq

Every tool accepts an optional _jq string in its arguments. The expression runs on the complete returned JSON, after the normal response serialization. The _jq name is reserved for response filtering to avoid conflicts with business parameters. Usage guidance is sent once in the MCP initialize response's instructions; each tool schema declares only the optional parameter name and type. For example:

{
  "name": "quote",
  "arguments": {
    "symbols": ["AAPL.US", "MSFT.US"],
    "_jq": "map({symbol, last_done})"
  }
}

Use .data[:5] to take the first five entries of a data array, .data | map(select(.price > 10)) to select rows, or {total: .total} to project fields. Expressions use the embedded jaq engine's jq-compatible syntax; no separate jq executable is needed.

• Omit _jq (or pass null) to preserve the original response.
• One output value is returned directly, multiple values as an array, and no values as []. Scalars and arrays are JSON text; objects also appear in structuredContent, containing only the filtered fields.
• Plain text responses are available as JSON strings. Multiple content blocks without structured content are available as an array.
• Tool errors and permission/no-data explanations remain unfiltered.
• Empty, invalid, or non-string expressions are rejected before the tool runs. If filtering fails at runtime, the response explicitly says the tool already executed. Do not automatically retry writes such as placing an order.
• Environment access, filesystem imports, and logging filters are unavailable. Output is limited to 10,000 values and 8 MiB; exceeding a limit returns an error rather than a partial result.

Because filters can change the response shape, tools do not advertise a fixed outputSchema. Original typed schemas remain available through resources/list and resources/read at lb://tools/{tool-name}/output-schema for schema-backed tools.

Connect your own client

Longbridge runs a hosted endpoint at https://mcp.longbridge.com — point any MCP client at it and complete OAuth when prompted. Authorization is auto-discovered via RFC 9728; there is no token to paste.

Claude Code

claude mcp add --transport http longbridge https://mcp.longbridge.com

Claude Desktop — add to claude_desktop_config.json, then restart:

{ "mcpServers": { "longbridge": { "url": "https://mcp.longbridge.com" } } }

Cursor · Cline · Windsurf · Zed · other clients — point them at https://mcp.longbridge.com with transport streamable-http.

# Local self-hosted instance (see Self-hosting below)
claude mcp add --transport http longbridge-local http://localhost:8000/mcp

claude mcp list                  # registered servers
claude mcp get longbridge        # config + auth status
claude mcp remove longbridge     # unregister
claude mcp logout longbridge     # re-trigger OAuth after revocation

The 163 tools

Twenty categories spanning market data, trading, research and account management.

Self-hosting

Prefer your own instance? Run the published image:

docker run -p 8443:8443 \
  -v /path/to/certs:/certs:ro \
  ghcr.io/longbridge/longbridge-mcp \
  --bind 0.0.0.0:8443 \
  --base-url https://mcp.example.com \
  --tls-cert /certs/cert.pem \
  --tls-key /certs/key.pem

Set --base-url to your externally reachable URL on any public deployment — it is published in the OAuth metadata clients use to discover the authorization server. It defaults to http://localhost:{port}, which remote clients cannot use.

Or build from source: cargo build --release && ./target/release/longbridge-mcp.

Development

cargo +nightly fmt      # format
cargo clippy            # lint
cargo test              # test

License

Released under the MIT License.