langchain-crustapi

This package connects CrustAPI to LangChain, giving your chains and agents clean, structured Google data from one endpoint (web search, Maps, News, Shopping, Images, Videos, Places, Scholar, and Patents) plus public LinkedIn data (profiles, companies, posts, jobs, and people search). You only pay for successful results, and there's a free tier with no card.

Installation

pip install -U langchain-crustapi
export CRUSTAPI_API_KEY="your-key"   # free at https://crustapi.com

Usage

from langchain_crustapi import CrustAPISearch

# Web search (default)
tool = CrustAPISearch(max_results=5)
tool.invoke({"query": "best crm software"})

# Pick a Google surface
maps = CrustAPISearch(search_type="maps", location="Austin, TX")
maps.invoke({"query": "dentists"})

news = CrustAPISearch(search_type="news")
news.invoke({"query": "openai"})

Bind it to an agent like any other LangChain tool:

from langchain.chat_models import init_chat_model
from langchain_crustapi import CrustAPISearch

llm = init_chat_model("gpt-4o-mini")
agent_llm = llm.bind_tools([CrustAPISearch()])

LinkedIn tool

CrustAPILinkedIn returns public LinkedIn data as the same clean JSON: a person's profile, a company page, recent posts, job listings, or people search. Pick the surface with linkedin_type and pass a LinkedIn URL or keywords.

from langchain_crustapi import CrustAPILinkedIn

# Profile (default)
profile = CrustAPILinkedIn()
profile.invoke({"url": "https://www.linkedin.com/in/satyanadella"})

# People search, with each person's full profile in the same call
people = CrustAPILinkedIn(linkedin_type="search", enrich=True)
people.invoke({"keywords": "growth marketer saas"})

Parameters

CrustAPISearch

• search_type: the Google surface, web (default), news, maps, places, shopping, images, videos, scholar, patents.
• max_results: number of results to return (default 10).
• gl: two-letter country code, e.g. us.
• hl: two-letter language code, e.g. en.
• location: city or region for local results, e.g. Austin, TX.

CrustAPILinkedIn

• linkedin_type: profile (default), company, posts, jobs, search.
• limit: max results for posts, jobs, or people search.
• start: result offset for jobs.
• location: location filter for jobs, e.g. Austin, TX.
• enrich: people search only, return each person's full profile in the same call.
• employees: company only, include the employee list.
• comments: posts only, include comments.

profile, company, and posts take a url. search takes keywords. jobs takes keywords (plus optional location) or a job url.

The API key is read from the CRUSTAPI_API_KEY environment variable, or you can pass crustapi_api_key when constructing either tool.