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mcp/harbor
LangChain

Payload Validator for LangChain

com.gumballtools/payload-validator

Validate JSON, YAML, XML and CSV with exact line/column errors and silent-corruption warnings.

client:LangChain transport:streamable-http tools:5

Install Payload Validator in LangChain

pip install langchain-mcp-adapters 

from langchain_mcp_adapters.client import MultiServerMCPClient

client = MultiServerMCPClient({
        "payload-validator": {
            "transport": "streamable_http",
            "url": "https://payload-validator.gumballtools.com/api/mcp",
        }
})

tools = await client.get_tools()

get_tools() returns the server's tools as LangChain tools, ready for an agent. LangChain docs

What LangChain can do once it is connected

Payload Validator in other clients

Payload Validator MCP server