Tavily Search

Tavily 的搜索 API 是一款专为 AI 代理 (LLM) 构建的搜索引擎，能够快速提供实时、准确和基于事实的结果。

概述

集成详情

类	包	可序列化	JS 支持	最新包
TavilySearch	langchain-tavily	❌	❌

工具功能

返回工件	原生异步	返回数据	定价
❌	✅	标题、URL、内容片段、raw_content、答案、图像	每月 1,000 次免费搜索

设置

集成位于 langchain-tavily 包中。

%pip install -qU langchain-tavily

凭据

我们还需要设置 Tavily API 密钥。您可以通过访问此网站并创建一个帐户来获取 API 密钥。

import getpass
import os

if not os.environ.get("TAVILY_API_KEY"):
    os.environ["TAVILY_API_KEY"] = getpass.getpass("Tavily API key:\n")

实例化

这里我们展示如何实例化 Tavily 搜索工具的实例，使用

from langchain_tavily import TavilySearch

tool = TavilySearch(
    max_results=5,
    topic="general",
    # include_answer=False,
    # include_raw_content=False,
    # include_images=False,
    # include_image_descriptions=False,
    # search_depth="basic",
    # time_range="day",
    # include_domains=None,
    # exclude_domains=None
)

调用

直接使用 args 调用

Tavily 搜索工具在调用期间接受以下参数

query（必需）：自然语言搜索查询
以下参数也可以在调用期间设置：include_images、search_depth、time_range、include_domains、exclude_domains、include_images
出于可靠性和性能原因，某些影响响应大小的参数在调用期间无法修改：include_answer 和 include_raw_content。这些限制可以防止意外的上下文窗口问题，并确保结果的一致性。

注意：可选参数可供代理动态设置，如果您在实例化期间设置了一个参数，然后在调用工具时使用不同的值，则该工具将使用您在调用期间传递的值。

tool.invoke({"query": "What happened at the last wimbledon"})

{'query': 'What happened at the last wimbledon',
 'follow_up_questions': None,
 'answer': None,
 'images': [],
 'results': [{'title': "Andy Murray pulls out of the men's singles draw at his last Wimbledon",
   'url': 'https://www.nbcnews.com/news/sports/andy-murray-wimbledon-tennis-singles-draw-rcna159912',
   'content': "NBC News Now LONDON — Andy Murray, one of the last decade's most successful male tennis players, has pulled out of the singles tournament at what is almost certain to be his last Wimbledon, his team confirmed Tuesday. Murray, 37, who has won the Wimbledon singles title twice and the U.S Open once, has been battling to be fit to play at the All England Club for weeks. “Unfortunately, despite working incredibly hard on his recovery since his operation just over a week ago, Andy has taken the very difficult decision not to play the singles this year,” his team said in a statement reported by Sky News. The news caps a glittering career on the ATP singles tour, which placed Murray at No. 1 in the world for 41 weeks.",
   'score': 0.67527276,
   'raw_content': None},
  {'title': 'Andy Murray brought to tears by emotional ceremony as Wimbledon ...',
   'url': 'https://edition.cnn.com/2024/07/05/sport/andy-murray-wimbledon-farewell-ceremony-spt-intl/index.html',
   'content': 'Andy Murray brought to tears by emotional ceremony as Wimbledon farewell begins with doubles defeat | CNN Football Tennis Golf Motorsport US Sports Olympics Climbing Esports Hockey CNN10 About CNN Andy Murray became emotional when speaking on court following his Wimbledon defeat on Thursday. It was an emotional night for three-time grand slam champion Andy Murray on Thursday, as the 37-year-old’s Wimbledon farewell began with doubles defeat. Following a doubles defeat alongside his brother Jamie on Thursday, Murray was moved to tears after a short ceremony on Centre Court in which a montage of his career played out on big screens. Murray watches on as a video montage of his career highlights plays on the big screens at Wimbledon. CNN10 About CNN',
   'score': 0.43482184,
   'raw_content': None},
  {'title': 'Wimbledon - Latest News, Headlines and Entertainment from the BBC',
   'url': 'https://www.bbc.co.uk/news/topics/c1kr68g26j9t',
   'content': "Wimbledon - Latest News, Headlines and Entertainment from the BBC BBC Homepage Search BBC Close menu BBC News BBC Verify World News TV Weather for Wimbledon London London Disabled people share experience of accessible homes London Man's pop-up urinal death may never be explained, family fears London London London London London London London Met PC jailed for assaulting man in hospital bed London London London Man jumped to his death in police station - inquest London Central London YMCA closes after failed injunction Kerr denies 'whiteness as insult' against police Man denies being getaway driver in £1m watch raid About the BBC Contact the BBC BBC emails for you The BBC is not responsible for the content of external sites.",
   'score': 0.3916624,
   'raw_content': None},
  {'title': 'Wimbledon - latest news, breaking stories and comment - The Independent',
   'url': 'https://www.independent.co.uk/topic/wimbledon',
   'content': "Independent Australian Open champion Jannik Sinner's style draws comparisons to Novak Djokovic Patten wins second grand slam doubles title after Australian Open epic Australian Open: Madison Keys can win her first Slam title and stop Aryna Sabalenka's threepeat Novak Djokovic hits back to beat Carlos Alcaraz in Australian Open thriller Australian Open 2025: Carlos Alcaraz and Jannik Sinner have a real rivalry atop men's tennis Australian Open 2025: Carlos Alcaraz and Jannik Sinner have a real rivalry atop men's tennis Australian Open 2025: Cases involving Jannik Sinner and Iga Swiatek make doping a top topic Australian Open 2025: There really isn't much time off in the offseason for tennis players Jd Sports Discount Code",
   'score': 0.3539422,
   'raw_content': None},
  {'title': 'Novak Djokovic loses to Carlos Alcaraz Wimbledon final',
   'url': 'https://www.wimbledon.com/en_GB/news/articles/2023-07-16/alcaraz_ends_the_djokovic_run.html',
   'content': 'Password* By joining myWimbledon you are confirming you are happy to receive news and information from The All England Lawn Tennis Club regarding The Club, The Championships and The Grounds via email By joining myWimbledon you are confirming you are happy to receive news and information from The All England Lawn Tennis Club regarding The Club, The Championships and The Grounds via email Please enter your email address to update your password: We have sent details on how to update your password to the email address you provided. A verification email with a link to verify your account has been sent to you. Please enter the code sent to your email address below and click SUBMIT to complete the verification.',
   'score': 0.23453853,
   'raw_content': None}],
 'response_time': 1.43}

使用 ToolCall 调用

我们还可以使用模型生成的 ToolCall 调用该工具，在这种情况下，将返回 ToolMessage

# This is usually generated by a model, but we'll create a tool call directly for demo purposes.
model_generated_tool_call = {
    "args": {"query": "euro 2024 host nation"},
    "id": "1",
    "name": "tavily",
    "type": "tool_call",
}
tool_msg = tool.invoke(model_generated_tool_call)

# The content is a JSON string of results
print(tool_msg.content[:400])

{"query": "euro 2024 host nation", "follow_up_questions": null, "answer": null, "images": [], "results": [{"title": "UEFA Euro 2024 - Wikipedia", "url": "https://en.wikipedia.org/wiki/UEFA_Euro_2024", "content": "Tournament details Host country Germany Dates 14 June – 14 July Teams 24 Venue(s) 10 (in 10 host cities) Final positions Champions Spain (4th title) Runners-up England Tournament statisti

在代理中使用

我们可以通过将工具绑定到代理，直接将我们的工具与代理执行器一起使用。这使代理能够动态设置 Tavily 搜索工具的可用参数。

在下面的示例中，当我们要求代理查找“哪个国家主办了 2024 年欧洲杯？仅包括维基百科来源。”时，代理将动态设置参数并调用 Tavily 搜索工具：使用 {'query': 'Euro 2024 host nation', 'include_domains': ['wikipedia.org'] 调用 tavily_search

选择聊天模型

pip install -qU "langchain[openai]"

import getpass
import os

if not os.environ.get("OPENAI_API_KEY"):
  os.environ["OPENAI_API_KEY"] = getpass.getpass("Enter API key for OpenAI: ")

from langchain.chat_models import init_chat_model

llm = init_chat_model("gpt-4o-mini", model_provider="openai")

if not os.environ.get("OPENAI_API_KEY"):
    os.environ["OPENAI_API_KEY"] = getpass.getpass("OPENAI_API_KEY:\n")

我们将需要安装 langgraph

%pip install -qU langgraph

from langchain_tavily import TavilySearch
from langgraph.prebuilt import create_react_agent

# Initialize Tavily Search Tool
tavily_search_tool = TavilySearch(
    max_results=5,
    topic="general",
)

agent = create_react_agent(llm, [tavily_search_tool])

user_input = "What nation hosted the Euro 2024? Include only wikipedia sources."

for step in agent.stream(
    {"messages": user_input},
    stream_mode="values",
):
    step["messages"][-1].pretty_print()

API 参考：create_react_agent

================================[1m Human Message [0m=================================

What nation hosted the Euro 2024? Include only wikipedia sources.
==================================[1m Ai Message [0m==================================
Tool Calls:
  tavily_search (call_yxmR4K2uadsQ8LKoyi8JyoLD)
 Call ID: call_yxmR4K2uadsQ8LKoyi8JyoLD
  Args:
    query: Euro 2024 host nation
    include_domains: ['wikipedia.org']
=================================[1m Tool Message [0m=================================
Name: tavily_search

{"query": "Euro 2024 host nation", "follow_up_questions": null, "answer": null, "images": [], "results": [{"title": "UEFA Euro 2024 - Wikipedia", "url": "https://en.wikipedia.org/wiki/UEFA_Euro_2024", "content": "Tournament details Host country Germany Dates 14 June – 14 July Teams 24 Venue(s) 10 (in 10 host cities) Final positions Champions Spain (4th title) Runners-up England Tournament statistics Matches played 51 Goals scored 117 (2.29 per match) Attendance 2,681,288 (52,574 per match) Top scorer(s) Harry Kane Georges Mikautadze Jamal Musiala Cody Gakpo Ivan Schranz Dani Olmo (3 goals each) Best player(s) Rodri Best young player Lamine Yamal ← 2020 2028 → The 2024 UEFA European Football Championship, commonly referred to as UEFA Euro 2024 (stylised as UEFA EURO 2024) or simply Euro 2024, was the 17th UEFA European Championship, the quadrennial international football championship organised by UEFA for the European men's national teams of their member associations. Germany hosted the tournament, which took place from 14 June to 14 July 2024. The tournament involved 24 teams, with Georgia making their European Championship debut. [4] Host nation Germany were eliminated by Spain in the quarter-finals; Spain went on to win the tournament for a record fourth time after defeating England 2–1 in the final.", "score": 0.9104262, "raw_content": null}, {"title": "UEFA Euro 2024 - Simple English Wikipedia, the free encyclopedia", "url": "https://simple.wikipedia.org/wiki/UEFA_Euro_2024", "content": "The 2024 UEFA European Football Championship, also known as UEFA Euro 2024 or simply Euro 2024, was the 17th edition of the UEFA European Championship. Germany was hosting the tournament. ... The UEFA Executive Committee voted for the host in a secret ballot, with only a simple majority (more than half of the valid votes) required to determine", "score": 0.81418616, "raw_content": null}, {"title": "Championnat d'Europe de football 2024 — Wikipédia", "url": "https://fr.wikipedia.org/wiki/Championnat_d'Europe_de_football_2024", "content": "Le Championnat d'Europe de l'UEFA de football 2024 est la 17 e édition du Championnat d'Europe de football, communément abrégé en Euro 2024, compétition organisée par l'UEFA et rassemblant les meilleures équipes nationales masculines européennes. L'Allemagne est désignée pays organisateur de la compétition le 27 septembre 2018. C'est la troisième fois que des matches du Championnat", "score": 0.8055255, "raw_content": null}, {"title": "UEFA Euro 2024 bids - Wikipedia", "url": "https://en.wikipedia.org/wiki/UEFA_Euro_2024_bids", "content": "The bidding process of UEFA Euro 2024 ended on 27 September 2018 in Nyon, Switzerland, when Germany was announced to be the host. [1] Two bids came before the deadline, 3 March 2017, which were Germany and Turkey as single bids. ... Press agencies revealed on 24 October 2013, that the European football governing body UEFA would have decided on", "score": 0.7882741, "raw_content": null}, {"title": "2024 UEFA European Under-19 Championship - Wikipedia", "url": "https://en.wikipedia.org/wiki/2024_UEFA_European_Under-19_Championship", "content": "The 2024 UEFA European Under-19 Championship (also known as UEFA Under-19 Euro 2024) was the 21st edition of the UEFA European Under-19 Championship (71st edition if the Under-18 and Junior eras are included), the annual international youth football championship organised by UEFA for the men's under-19 national teams of Europe. Northern Ireland hosted the tournament from 15 to 28 July 2024.", "score": 0.7783298, "raw_content": null}], "response_time": 1.67}
==================================[1m Ai Message [0m==================================

The nation that hosted Euro 2024 was Germany. You can find more information on the [Wikipedia page for UEFA Euro 2024](https://en.wikipedia.org/wiki/UEFA_Euro_2024).

API 参考

有关所有 Tavily Search API 功能和配置的详细文档，请访问 API 参考： https://docs.tavily.com/documentation/api-reference/endpoint/search

工具概念指南
工具操作指南

概述​

集成详情​

工具功能​

设置​

凭据​

实例化​

调用​

直接使用 args 调用​

使用 ToolCall 调用​

在代理中使用​

API 参考​

相关内容​

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概述