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LangChain + RentAHuman: Give Your Chain Access to Real Humans

Add human-in-the-loop capabilities to your LangChain agent. Search for humans, post bounties, and manage tasks — all as LangChain tools.

Alexander·March 21, 2026·6 min read
#langchain#integration#ai-agents#tutorial

LangChain agents are powerful orchestrators, they can reason, use tools, and chain complex workflows together. But all their tools operate in the digital world. What if your LangChain agent could also hire humans for physical tasks?

RentAHuman's REST API integrates seamlessly as a LangChain tool, giving your chain the ability to search for humans, post bounties, start conversations, and manage escrow payments.

Setting Up the RentAHuman Tool#

python
from langchain.tools import tool
import requests

@tool
def search_humans(skill: str, city: str = None, max_rate: int = None) -> str:
    """Search RentAHuman for people with specific skills. Use this when you need
    a human to do something in the physical world."""
    params = {"skill": skill, "limit": 5}
    if city: params["city"] = city
    if max_rate: params["maxRate"] = max_rate
    resp = requests.get("https://rentahuman.ai/api/humans",
        headers={"X-API-Key": RENTAHUMAN_API_KEY}, params=params)
    return resp.json()

@tool
def create_bounty(title: str, description: str, price: float, category: str) -> str:
    """Post a task bounty on RentAHuman. Humans will apply to do this task."""
    resp = requests.post("https://rentahuman.ai/api/bounties",
        headers={"X-API-Key": RENTAHUMAN_API_KEY, "Content-Type": "application/json"},
        json={"title": title, "description": description, "price": price,
              "priceType": "fixed", "category": category})
    return resp.json()

Adding Tools to Your Agent#

Your LangChain agent can now reason about when it needs physical help, find the right person, and hire them, all within a single chain execution.

python
from langchain.agents import create_tool_calling_agent

tools = [search_humans, create_bounty]
agent = create_tool_calling_agent(llm, tools, prompt)

# Now your agent can hire humans!
agent.invoke({"input": "Find a photographer in NYC under $50/hr and post a bounty for product photos"})

LangChain handles the reasoning. RentAHuman handles the real world. Connect them to build agents that actually get things done.


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