nerq-langchain

Trust-gate your LangChain agents with Nerq. Preflight trust checks before every tool call.

Install

pip install nerq-langchain

Quick Start — trust_gate (3 lines)

from nerq_langchain import trust_gate

agent = initialize_agent(tools, llm)
agent = trust_gate(agent, min_trust=60)
# Every tool call now gets a preflight trust check

Before each tool call, trust_gate checks the tool's trust score via nerq.ai/v1/preflight:

• PROCEED (trust >= 70): runs silently
• CAUTION (trust 40-69): logs warning, proceeds
• DENY (trust < 40): raises TrustError
• UNKNOWN (not in index): proceeds with warning
• Network failure: proceeds with warning (never blocks)

NerqPreflight — Check trust on any agent

from nerq_langchain import NerqPreflight

tool = NerqPreflight()
print(tool.run("SWE-agent"))
# Nerq Preflight: SWE-agent
# Recommendation: PROCEED
# Trust Score: 92.5/100
# Grade: A+
# Verified: Yes

NerqSearch — Find agents for a task

from nerq_langchain import NerqSearch

tool = NerqSearch()
print(tool.run("code review"))
# Nerq Search: 'code review' — 5 results
# 1. SWE-agent/SWE-agent — Trust: 92.5, Category: security
# ...

In a LangChain agent

from langchain_openai import ChatOpenAI
from langchain.agents import initialize_agent, AgentType
from nerq_langchain import NerqPreflight, NerqSearch, trust_gate

llm = ChatOpenAI(model="gpt-4")
tools = [NerqPreflight(), NerqSearch()]
agent = initialize_agent(tools, llm, agent=AgentType.OPENAI_FUNCTIONS)
agent = trust_gate(agent, min_trust=60)

result = agent.run("Is SWE-agent safe to use for code review?")

With LangGraph

from nerq_langchain import NerqPreflight, NerqSearch
from langgraph.prebuilt import create_react_agent

tools = [NerqPreflight(), NerqSearch()]
agent = create_react_agent(model, tools)

Error handling

from nerq_langchain import trust_gate, TrustError

agent = trust_gate(agent, min_trust=70)

try:
    result = agent.run("Use low-trust-tool to analyze data")
except TrustError as e:
    print(f"Blocked: {e.tool_name} (trust={e.trust_score})")

API

• Endpoint: GET https://nerq.ai/v1/preflight?target={name}
• Auth: None required
• Rate limit: Generous (no hard cap during beta)
• Coverage: 204K+ agents and tools
• Latency: <50ms typical

Links

• nerq.ai — AI Asset Search Engine
• API Docs
• Preflight Docs
• KYA — Know Your Agent