← All harnesses

Harness

Langflow

Low-code builder for agents and RAG, open source.

Visual Python-based builder for agentic and RAG apps; every flow can be exposed as an API or MCP server.

Where it runsLocal or cloud
CostFree

Open source and free to self-host.

Good for: Content, Support triage

Visit Langflow · Source: github.com

What plugs into Langflow

Local AI tools

Local AI tool

Ollama

Run open models locally with one command.

Local or cloudFree

MCP connectors

MCP connector

Zapier MCP

Connect any MCP-capable agent to 9,000 apps.

CloudFree tier
MCP connector

Stripe MCP

Let agents look up payments, invoices and customers in Stripe.

CloudFree
MCP connector

HubSpot MCP Server

Give agents access to your HubSpot CRM records.

CloudFree
MCP connector

QuickBooks Online MCP Server

Intuit's MCP server for QuickBooks bookkeeping data.

Runs locallyFree
MCP connector

MCP Reference Servers

Official reference MCP servers: filesystem, fetch, memory, git and more.

Runs locallyFree