Fingerprint

Fingerprint MCP Server

Features

• Run locally, or use the managed instance at https://mcp.fpjs.io/mcp (in Claude, add it from the connectors directory)
• Event tools: Retrieve and search identification events with full smart signal data
• Management tools: Manage workspace environments and API keys
• Onboarding prompt: Guided setup for integrating Fingerprint into a project
• Supports both stdio and streamable-http transports
• Optional HTTPS with TLS certificates
• OAuth2 login supported
• Public mode for multi-tenant deployments (API keys passed via JWT bearer token)
• Tool filtering to control which tools are exposed
• Configurable via environment variables or CLI flags
• Docker support for easy deployment

Installation

From Source

go install github.com/fingerprintjs/fingerprint-mcp-server@latest

Build Locally

git clone https://github.com/fingerprintjs/fingerprint-mcp-server.git
cd fingerprint-mcp-server
make build

make build runs go generate (to download the OpenAPI spec and generate schema files under internal/schema/) and then builds the binary.

Configuration

The server can be configured via CLI flags or environment variables:

CLI Flag	Environment Variable	Default	Description
--serverapikey	FINGERPRINT_SERVER_API_KEY		Fingerprint Server API key (private mode)
--serverapiurl	FINGERPRINT_SERVER_API_URL	api.fpjs.io	Custom Server API URL (omit to use default)
--managementapikey	FINGERPRINT_MANAGEMENT_API_KEY		Fingerprint Management API key (private mode)
--managementapiurl	FINGERPRINT_MANAGEMENT_API_URL	management-api.fpjs.io	Custom Management API URL (omit to use default)
--region	FINGERPRINT_REGION	us	API region: us, eu, or ap (private mode)
--transport	MCP_TRANSPORT	stdio	Transport: stdio or streamable-http
--port	MCP_PORT	8080	Port for HTTP/HTTPS server
--tlscert	MCP_TLS_CERT		Path to TLS certificate file
--tlskey	MCP_TLS_KEY		Path to TLS private key file
--readonly	MCP_READ_ONLY	false	Only expose read tools (shorthand for --tools with read-only tools)
--tools	MCP_TOOLS		Comma-separated list of tool names to register (overrides --readonly)
--publicmode	MCP_PUBLIC	false	Public mode: extract API keys from JWT bearer tokens
--authtoken	MCP_AUTH_TOKEN	(auto-generated in private mode)	Bearer token required to access the server (private mode)
--jwtpublickey	FINGERPRINT_PUBLIC_KEY		PEM-encoded ES256 public key for verifying Fingerprint-issued JWT tokens
--oauthresource	OAUTH_RESOURCE		URL of this server (for OAuth metadata)
--oauthauthorizationserver	OAUTH_AUTH_SERVER		URL of the OAuth authorization server
--jwksurl	JWKS_URL		JWKS URL for JWT token verification in public mode
--openaiappschallengetoken	OPENAI_APPS_CHALLENGE_TOKEN		Domain verification token served at /.well-known/openai-apps-challenge

Telemetry

This binary ships with telemetry disabled. There is no built-in analytics backend and the default emitter is a no-op, so running the OSS binary sends nothing to anyone.

The server exposes a hook (analytics.Emitter in the analytics package) that fires on each MCP method. Embedders who want product analytics register their own emitter by importing this package as a library and calling WithAnalytics(emitter) when constructing the server. Fingerprint's hosted build (mcp.fpjs.io) does this with an Amplitude emitter, but that implementation lives in the private managed repo, not here.

If you build your own emitter, the event shape is in analytics/analytics.go. The middleware fires one mcp_method_called event per MCP method, gated on a non-empty subscription_id (so pre-auth methods and the private-mode auth path stay silent regardless).

Request inspection

Embedders can register a second hook (requestinspect.Inspector in the requestinspect package) that receives HTTP request metadata — method, URL, original headers, and TCP peer address — for every request to the /mcp endpoint, useful for audit logging and traffic analysis. Register it with WithRequestInspector(inspector) when constructing the server. The OSS binary configures no inspector, so nothing is collected.

The full contract (timing, fail-open behavior, read-only fields, stdio) is documented in requestinspect/requestinspect.go, the source of truth for this hook. See requestinspect/example_test.go for a complete embedder-side implementation skeleton (bounded queue, background delivery, header redaction, graceful drain).

Usage

Private mode vs. Public mode

Private mode means the server runs with its API keys pre-configured (FINGERPRINT_SERVER_API_KEY and FINGERPRINT_MANAGEMENT_API_KEY). This mode is useful when you are running a local instance intended to be used within your organization: server automatically uses those specified in the config. In this mode, auth token (MCP_AUTH_TOKEN) is enforced to protect your instance of the MCP server from unauthenticated use.

Public mode is how https://mcp.fpjs.io/mcp is run. It is meant to be used in situations when a single instance can be used by different users from different organizations, each with their own API keys. In this mode, API keys are extracted from JWT access tokens that are issued by https://dashboard.fingerprint.com or by user following the OAuth2 flow.

Stdio Transport (Default)

export FINGERPRINT_SERVER_API_KEY=your-secret-api-key
./fingerprint-mcp-server

Streamable HTTP Transport

export FINGERPRINT_SERVER_API_KEY=your-secret-api-key
./fingerprint-mcp-server --transport=streamable-http --port=8080

The MCP endpoint will be available at http://localhost:8080/mcp.

HTTPS

Provide TLS certificate and key files to enable HTTPS:

./fingerprint-mcp-server --transport=streamable-http \
  --tlscert=cert.pem --tlskey=key.pem

Tool Filtering

By default, all tools are registered based on which API keys are configured. You can restrict which tools are exposed:

# Only expose read-only tools
./fingerprint-mcp-server --readonly

# Expose a specific set of tools
./fingerprint-mcp-server --tools=get_event,search_events,list_environments

When --tools is set, it overrides --readonly.

Docker

Build the Image

docker build -t fingerprint-mcp-server .

Run with Stdio Transport

docker run -i --rm \
  -e FINGERPRINT_SERVER_API_KEY=your-secret-api-key \
  fingerprint-mcp-server

Run with Streamable HTTP Transport

docker run -d --rm \
  -e FINGERPRINT_SERVER_API_KEY=your-secret-api-key \
  -e MCP_TRANSPORT=streamable-http \
  -p 8080:8080 \
  fingerprint-mcp-server

MCP Client Configuration

Hosted endpoint (managed)

The managed instance at https://mcp.fpjs.io/mcp runs in public mode and authenticates each user via OAuth2. Nothing to run or configure.

In Claude, add it from the connectors directory rather than as a custom connector: open Customize > Connectors, choose Browse connectors, and search for Fingerprint. The same catalog serves claude.ai, Desktop, mobile and Claude Code, so this only has to be done once per account.

Adding it as a custom connector still works, but you have to name it yourself, and some characters in that name break tool discovery while the connector still reports as connected.

In other clients, point them at the URL directly:

{
  "mcpServers": {
    "fingerprint": {
      "type": "http",
      "url": "https://mcp.fpjs.io/mcp"
    }
  }
}

Self-hosted

Add to your Cursor/Claude Desktop/etc configuration file (e.g. claude_desktop_config.json):

Stdio Transport:

{
  "mcpServers": {
    "fingerprint": {
      "command": "/path/to/fingerprint-mcp-server",
      "env": {
        "FINGERPRINT_SERVER_API_KEY": "your-secret-api-key"
      }
    }
  }
}

Streamable HTTP Transport:

{
  "mcpServers": {
    "fingerprint": {
      "url": "https://url/mcp",
      "headers": {
        "Authorization": "Bearer <auth-token>"
      }
    }
  }
}

Docker with Stdio:

{
  "mcpServers": {
    "fingerprint": {
      "command": "docker",
      "args": ["run", "-i", "--rm", "-e", "FINGERPRINT_SERVER_API_KEY=your-secret-api-key", "fingerprint-mcp-server"]
    }
  }
}

Available Tools

Event tools require a Server API key. Management tools require a Management API key. get_current_time needs no key and is always available. Write tools (create/update/delete) are hidden when --readonly is set or excluded via --tools.

Tool	Description
get_current_time	Return the current date/time in UTC (and an optional IANA timezone)
get_event	Retrieve a specific identification event by ID
search_events	Search events with filters (visitor, IP, smart signals, time range)
list_environments	List workspace environments with pagination
get_api_key	Get details of a specific API key
list_api_keys	List API keys with optional type/status/environment filters
create_environment	Create a new workspace environment
update_environment	Update an existing workspace environment
delete_environment	Delete a workspace environment
create_api_key	Create a new API key (public/secret/proxy)
update_api_key	Update an existing API key
delete_api_key	Delete an API key (irreversible)

Available Resources

• fingerprint://events/{event_id} — Returns full event data for a given event ID.
• fingerprint://schemas/event — JSON Schema describing the event output structure.
• fingerprint://schemas/environment — JSON Schema for environment objects.
• fingerprint://schemas/api-key — JSON Schema for API key objects.

Available Prompts

• onboarding — A guided walkthrough for integrating Fingerprint into a project, covering JavaScript Agent installation, API key setup, and verification steps.

License

MIT