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    Yahoo Info Center > Yahoo Terms Center > Api

    Yahoo! APIs Terms of Use (Yahoo Developer Network Terms of Use)

    Please note these Terms will change on October 16, 2014. The changes are:
    New section 1 (g) (viii) “You shall not:” … "Use the Yahoo APIs on or in a website or service directed to children, as defined by the Children’s Online Privacy Protection Act, unless otherwise expressly agreed to in writing by Yahoo.”
    New Section 2 (d): "You must disclose to end users of your product or service, in an easily accessible privacy policy, the fact that a third party collects, stores and uses personal data in connection with your product or service.”

    Thank you for using the Yahoo! application programming interfaces (the "Yahoo! APIs"). The individual who accepts these terms and conditions must be aged 13 years or older, must possess his or her own valid Yahoo! ID, and is responsible for compliance with the Yahoo! Terms of Service (“TOS”) (http://info.yahoo.com/legal/us/yahoo/utos/utos-173.html). By using the Yahoo! APIs, you agree to these Yahoo! APIs Terms of Use (the "Terms of Use" or “TOU”) (http://info.yahoo.com/legal/us/yahoo/api/api-2140.html), any and all guideline documents associated with the APIs (http://info.yahoo.com/guidelines/us/yahoo/ydn/ydn-3955.html) ("Guidelines"), and any and all API-specific implementation documentation, as referenced in the Guidelines and found on the individual API and Web Services information pages. These documents, including the TOS, TOU, Guidelines, and API specific documentation are referred to here as the “API Documents”. If you are entering this TOU on behalf of a company or other legal entity, you represent that you have the legal authority to bind the legal entity to this TOU, in which case "you" or "your" shall mean such entity. If you do not have such authority or if you disagree with any of the terms in the TOU or API Documents, Yahoo! does not grant you a license to use the Yahoo! APIs. In the event of any inconsistency between these Terms of Use and the TOS, these Terms of Use control.

    PLEASE NOTE that some of Yahoo!’s Web Services and APIs are licensed under terms that supplement or differ from these Terms of Use. In particular, Yahoo! Maps APIs Yahoo! Messenger APIs, Yahoo!'s BOSS Search APIs, and Yahoo! Web Analytics APIs are not governed by these Terms of Use, and are instead covered by different terms. These other API terms can be found here:

    Yahoo! Maps API Terms of Use –
    http://info.yahoo.com/legal/us/yahoo/maps/mapsapi/mapsapi-2141.html;

    Yahoo! Messenger IM API Terms of Use –
    http://info.yahoo.com/legal/us/yahoo/messengerimapi/tou.html;

    Yahoo! BOSS Search APIs –
    http://info.yahoo.com/legal/us/yahoo/search/bosstos/bosstos-2317.html.

    Yahoo! Address Book API -
    http://info.yahoo.com/legal/us/yahoo/addressbook/apitos/apitos-2271.html.

    Yahoo! Search BOSS Services -
    http://info.yahoo.com/legal/us/yahoo/search/bosstos/bosstos-2317.html.

    Yahoo! Web Analytics APIs -
    http://info.yahoo.com/legal/us/yahoo/apitnc/apitnc-4109.html.

    Yahoo! Fantasy Sports APIs -
    http://info.yahoo.com/legal/us/yahoo/fantasysports/.

    PLEASE ALSO NOTE that many of Yahoo!’s APIs, including the Yahoo! Social APIs and contain rate limits. These rate limits and other implementation specifications are detailed in the API documentation which you can find here: http://developer.yahoo.com/everything.html.

    Yahoo! Inc. ("Yahoo!") reserves the right to update and change, from time to time, the API Documents (including these Terms of Use, the Guidelines, and all documents incorporated by reference). You can always find the most recent version of these Terms of Use at http://info.yahoo.com/legal/us/yahoo/api/api-2140.html. Yahoo! may change these Terms of Use by posting a new version without notice to you. Use of the Yahoo! APIs after such change constitutes acceptance of such changes.

    1. Licensed Uses and Restrictions.

    2. The Yahoo! APIs are owned by Yahoo! and are licensed to you on a worldwide (except as limited below), non-exclusive, non-sublicenseable, revocable basis on the terms and conditions set forth herein. These Terms of Use define legal use of the Yahoo! APIs, all updates, revisions, substitutions, and any copies of the Yahoo! APIs made by or for you. All rights not expressly granted to you are reserved by Yahoo!.

      1. Subject to the restrictions set forth in these Terms of Use, YOU MAY use the Yahoo! APIs and any updates provided by Yahoo! (in its sole discretion). Your license to the Yahoo! APIs under these Terms of Use continues until it is terminated by either party. You may terminate the license by discontinuing use of all or any of the Yahoo! APIs. Yahoo! may terminate the license at any time for any reason. This license terminates automatically if (i) you violate any term of these Terms of Use, (ii) Yahoo! publicly posts a written notice of termination on Yahoo!'s Web site, (iii) Yahoo! sends a written notice of termination to you, or (iv) Yahoo! ceases providing access to the Yahoo! APIs to you. Termination of the license constitutes termination of the TOU, except for the following provisions of the TOU, which survive: Data Collection, Storage, and Use; Ownership; Disclaimer of Any Warranty; Limitation of Liability; Exclusions and Limitations; Release and Waiver; Hold Harmless and Indemnity; General Terms; and any other section that would naturally survive termination of the TOU.

      2. Any communication or content submitted by you to Yahoo! is subject to these TOU and the TOS, and you grant to Yahoo! all rights to use and incorporate such communication and content in the Yahoo! API TOU or documentation, or any other Yahoo! product or service without compensation to you and without further recourse by you.

      3. Unless otherwise specified, use and redistribution of all computer code made available on the Yahoo! Developer Network is permitted in source and binary forms, provided that the following conditions are met:

        1. Redistributions in source code form must contain the copyright notice "Copyright © Yahoo! Inc. 2008, All Rights Reserved", this list of conditions, and the following disclaimer.

        2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions, and the following disclaimer in the documentation and/or other materials provided with the distribution.

        3. Neither the name of Yahoo! nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission of Yahoo!.

      4. DISCLAIMER TO BE INCLUDED WITH YAHOO! COMPUTER CODE:

      5. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

      6. If your product or service uses or is based upon the Yahoo! APIs, then YOU SHALL comply with the following:

        1. The Yahoo! Developer Network Attribution Policy located at http://developer.yahoo.com/attribution/.

        2. All instructions provided in the Yahoo! APIs and their associated documentation on the Yahoo! Developer Network to place application identification information (API Key) into any application or service you develop that incorporates or makes any use of the Yahoo! APIs. You may only create a single API Key per application or service and such API Key must accompany all web services requests coming from that application or service. You can sign up for an API Key at http://developer.yahoo.com/wsregapp/ for BBAuth API Keys and at http://developer.yahoo.com/dashboard/createKey.html for OAuth API Keys. You must provide accurate identification, contact, and other information required as part of the registration process. You SHALL NOT create any script or other automated tool that attempts to create multiple API Keys.

        3. You represent and warrant to Yahoo! that: (a) you have the right to use, reproduce, transmit, copy, publicly display, publicly perform, and distribute any content in or made available to Yahoo! and Yahoo! users by your use of the Yahoo! APIs in the manner contemplated under this Agreement, and that use by Yahoo! or others of any such content via the Yahoo! web service or API shall not violate the rights of any third party (e.g., copyright, patent, trademark, or other proprietary right of any person or entity), or any applicable regulation or law, including but not limited to any export, re-export, or import laws and the laws of any country in which your content or service is made available; and (b) if you submit or permit the submission of your or your users’ content or activity through or into a Yahoo! web service or API, you also grant the following perpetual, non-exclusive license to, use of, and rights to your or your users’ content or activity to others (such “others” may include but are not limited to Yahoo! users): (i) to access, distribute and/or display your or your users’ content or activity; (ii) the ability for Yahoo! registered users to rate, review, comment on and tag Your Content; and (iii) the ability to access, reproduce, distribute and/or perform your or your users’ content, activity, or information via Yahoo!’s web service APIs or via RSS or any similar XML or related feeds both on and off Yahoo!-controlled web sites.

      7. If you wish to confirm that your application constitutes an acceptable use of the Yahoo! APIs or wish to inquire about rate limit increases, register your application with us.

      8. YOU SHALL NOT:

        1. Use the Yahoo! APIs in connection with or to promote any products, services, or materials that constitute, promote or are used primarily for the purpose of dealing in: spyware, adware, or other malicious programs or code, the bypassing of copyright protection, counterfeit goods or replica designer products, items subject to US embargo, hate materials (e.g. Nazi memorabilia) or materials urging acts of terrorism, human suffering or violence, defamatory, libelous or threatening material, goods made from protected animal/plant species, recalled goods, any hacking, surveillance, interception, or descrambling equipment, cigarettes or cigarette tobacco, illegal drugs and paraphernalia, unlicensed sale of prescription drugs and medical devices, adult or child pornography, prostitution, body parts and bodily fluids, stolen products and items used for theft, fireworks, explosives, and hazardous materials, government IDs, police items, unlicensed trade or dealing in stocks and securities, gambling or gambling items, professional services regulated by state licensing regimes, non-transferable items such as airline tickets or event tickets, money transfers, person to person payments or extensions of credit, non-packaged food items, weapons and accessories, play-to-click or pay-to-read services;

        2. Use the Yahoo! APIs in any manner or for any purpose that violates any law or regulation, any right of any person, including but not limited to intellectual property rights, rights of privacy, or rights of personality, or in any manner inconsistent with the Yahoo! TOS or these Terms of Use;

        3. Use the Yahoo! APIs to operate nuclear facilities, life support, or other mission critical application where human life or property may be at stake. You understand that the Yahoo! APIs are not designed for such purposes and that their failure in such cases could lead to death, personal injury, or severe property or environmental damage for which Yahoo! is not responsible;

        4. Sell, lease, share, transfer, or sublicense the Yahoo! APIs or access or access codes thereto or derive income from the use or provision of the Yahoo! APIs, whether for direct commercial or monetary gain or otherwise, unless the API Documents specifically permit otherwise or Yahoo! gives prior, express, written permission; or

        5. Use the Yahoo! APIs in a manner that exceeds reasonable request volume, constitutes excessive or abusive usage, or otherwise fails to comply or is inconsistent with any part of the Yahoo! API documentation located within http://developer.yahoo.com/, as determined by Yahoo! in its sole discretion;

        6. Use the Yahoo! APIs in a product or service that competes with products or services offered by Yahoo!, unless the API Documents specifically permit otherwise or Yahoo! gives prior, express, written permission.

        7. Collect from the Yahoo! APIs, or use or disclose if obtained from the Yahoo! APIs, or write to the Yahoo! APIs, any Yahoo! user data, personal information as defined by the Children's Online Privacy Protection Act, or other information associated with users under age 13.

      9. OAuth and Brower-Based Authentication (“BBAuth”). If your use of Yahoo! APIs will access Yahoo! user information, or read or write information from or to Yahoo! user accounts through Yahoo! APIs, you must use either OAuth (http://developer.yahoo.com/oauth) or BBAuth (http://developer.yahoo.com/auth to authenticate your access to the Yahoo! network. The terms of this Section 1(h) applies to your use of OAuth and BBAuth.

        1. Yahoo! takes end user security and privacy very seriously, and you agree to give us all necessary assistance for the operation of your Application in compliance with these TOU and any applicable laws.

        2. Securing User Consent. You are solely responsible for securing clear, express consent from the user, granting you permission to access such user’s Yahoo! account using OAuth-enabled APIs or BBAuth-enabled APIs, including if applicable, retrieving user-specific information, or writing information to such user’s account. You will strictly comply with the scope of express consent they granted you when accessing such user’s Yahoo! account.

        3. Contact and Cooperation. You (or the name of the contact you gave to Yahoo! when you applied for your API Key for review if it's not you) must be reachable at all times for security questions or concerns. You can change this name or contact by signing up for a new API Key, and providing the correct contact information and using the new API Key instead. (http://developer.yahoo.com/wsregapp/ for BBAuth API Keys and http://developer.yahoo.com/dashboard/createKey.html for OAuth API Keys).

        4. Virus Precautions. All materials, including software and documents, that you provide to Yahoo!, must be checked with Internet industry standard up-to-date antivirus and anti-worm software, and determined to be virus-free and worm-free. Any data provided to Yahoo! must not contain harmful scripts or code.

        5. Industry Standards. Your networks, operating system and software of its web server(s), routers, databases, and computer systems (collectively, “System” or “Systems”) must be properly configured to Internet industry standards, as required to securely operate your Application. If you do not completely control any aspect of the System you will use all control or influence that you have over such Systems, and you will not architect or select Systems in a manner to avoid the foregoing obligation. An example of an unacceptable server is one that operates as open proxy. An example of architecting in an unacceptable manner would be if you select a server operated by a vendor with substandard security practices, so that you could contend that you do not control such server, in order to avoid having to select an acceptable server.

        6. Reporting. You must promptly report any security deficiencies in or intrusions to your Systems that you discover to Yahoo! in writing via email to ynoc@yahoo-inc.com . You will work with Yahoo! to immediately correct any security deficiency, and will disconnect immediately any intrusions or intruder. In the event of any such security deficiency or intrusion, you will make no public statements (i.e. press, blogs, bulletin boards, etc.) without prior written and express permission from Yahoo! in each instance.

        7. Access Control to Systems. To the extent you have control or influence over the Systems, you will log (in a time and date-stamped fashion) all instances of access to the Systems. you will encrypt the password and username files for the Systems that store or process any Yahoo! user data that you are permitted by Yahoo! to access. Passwords must be unique, unintuitive, and changed often. You will minimize access to and use of the passwords. Wherever possible, commands which require additional privileges should be securely logged (with time and date) to enable a complete audit trail of activities. When an individual terminates his or her employment with you, his or her passwords and access password facilities must be terminated immediately.

        8. Security Reviews. Yahoo! will have the right, at its own expense, to review, or to have an independent third party that is not your competitor, to inspect and review your compliance with these security provisions. You will (at your own expense) correct any security flaws detected by such a review as soon as possible. You will then promptly certify to Yahoo! in writing that the security flaw has been corrected, along with a description of the corrective action(s) taken. Yahoo! will give you 48 hours notice before conducting such a review, and may conduct no more than four reviews annually. Any such review will be conducted during regular business hours in such a manner as not to interfere with normal business activities. If a review reveals a material breach of any of these security provisions, you will reimburse Yahoo! for the reasonable costs of the review.

    3. Data Collection, Storage, and Use.

      1. You may not retain or use, and must immediately remove from any Application and any data repository in your possession or under your control any Yahoo! user data obtained through the Yahoo! APIs not explicitly identified as being storable indefinitely in the API Documents within 24 hours after the time at which you obtained the data, or such other time as Yahoo! may specify to you from time to time, including pursuant to notification received from application uninstall event handlers.

      2. You may not disclose any Yahoo! user data or store any Yahoo! user data in any data repository which enables any third party (other than the Yahoo! user) access unless such disclosure or third party access is expressly permitted by the Yahoo! user and disclosed in your privacy policy, which must be directly accessible through a link in your Application using Yahoo! APIs.

      3. You may not share GUIDs (Global Unique Identifiers) with any third party.

    4. Ownership.

    5. The Yahoo! APIs may be protected by copyrights, trademarks, service marks, international treaties, and/or other proprietary rights and laws of the U.S. and other countries. Yahoo!'s rights apply to the Yahoo! APIs and all output and executables of the Yahoo! APIs, excluding any software components developed by you which do not themselves incorporate the Yahoo! APIs or any output or executables of the Yahoo! APIs. You agree to abide by all applicable proprietary rights laws and other laws, as well as any additional copyright notices or restrictions contained in these Terms of Use and in the TOS. Yahoo! owns all rights, title, and interest in and to the Yahoo! APIs. These Terms of Use grant you no right, title, or interest in any intellectual property owned or licensed by Yahoo!, including (but not limited to) the Yahoo! APIs and Yahoo! trademarks.

    6. Support.

    7. Yahoo! may elect to provide you with support or modifications for the Yahoo! APIs (collectively, "Support"), in its sole discretion, and may terminate such Support at any time without notice to you. Yahoo! may change, suspend, or discontinue any aspect of the Yahoo! APIs at any time, including the availability of any Yahoo! APIs. Yahoo! may also impose limits on certain features and services or restrict your access to parts or all of the Yahoo! APIs or the Yahoo! Web site without notice or liability. Please register your application for priority notification of status alerts.

    8. Fees and Payments.

    9. Yahoo! reserves the right to charge fees for future use of or access to the Yahoo! APIs or the Yahoo! services and Web sites (collectively, "Yahoo! APIs Services") in Yahoo!'s sole discretion. If Yahoo! decides to charge for the Yahoo! APIs Services, Yahoo! will provide you prior notice of such charges.

    10. Disclaimer of Any Warranty.

    11. SOME OF THE YAHOO! APIS ARE EXPERIMENTAL AND HAVE NOT BEEN TESTED IN ANY MANNER. YAHOO! DOES NOT REPRESENT OR WARRANT THAT ANY YAHOO! APIS ARE FREE OF INACCURACIES, ERRORS, BUGS, OR INTERRUPTIONS, OR ARE RELIABLE, ACCURATE, COMPLETE, OR OTHERWISE VALID.

      THE YAHOO! APIS ARE PROVIDED "AS IS" WITH NO WARRANTY, EXPRESS OR IMPLIED, OF ANY KIND AND YAHOO! EXPRESSLY DISCLAIMS ANY AND ALL WARRANTIES AND CONDITIONS, INCLUDING, BUT NOT LIMITED TO, ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, AVAILABILITY, SECURITY, TITLE AND/OR NON-INFRINGEMENT. YOUR USE OF YAHOO! APIS IS AT YOUR OWN DISCRETION AND RISK, AND YOU WILL BE SOLELY RESPONSIBLE FOR ANY DAMAGE THAT RESULTS FROM THE USE OF ANY YAHOO! APIS INCLUDING, BUT NOT LIMITED TO, ANY DAMAGE TO YOUR COMPUTER SYSTEM OR LOSS OF DATA.

    12. Limitation of Liability.

    13. YAHOO! SHALL NOT, UNDER ANY CIRCUMSTANCES, BE LIABLE TO YOU FOR ANY INDIRECT, INCIDENTAL, CONSEQUENTIAL, SPECIAL OR EXEMPLARY DAMAGES ARISING OUT OF OR IN CONNECTION WITH USE OF THE YAHOO! APIS, WHETHER BASED ON BREACH OF CONTRACT, BREACH OF WARRANTY, TORT (INCLUDING NEGLIGENCE, PRODUCT LIABILITY OR OTHERWISE), OR ANY OTHER PECUNIARY LOSS, WHETHER OR NOT YAHOO! HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. UNDER NO CIRCUMSTANCES SHALL YAHOO! BE LIABLE TO YOU FOR ANY AMOUNT.

    14. Exclusions and Limitations.

    15. SOME JURISDICTIONS DO NOT ALLOW THE EXCLUSION OF CERTAIN WARRANTIES OR THE LIMITATION OR EXCLUSION OF LIABILITY FOR INCIDENTAL OR CONSEQUENTIAL DAMAGES. ACCORDINGLY, SOME OF THE ABOVE LIMITATIONS OF SECTIONS 6 AND 7 MAY NOT APPLY TO YOU.

    16. Release and Waiver.

    17. To the maximum extent permitted by applicable law, you hereby release and waive all claims against Yahoo!, and its subsidiaries, affiliates, officers, agents, licensors, co-branders or other partners, and employees from any and all liability for claims, damages (actual and/or consequential), costs and expenses (including litigation costs and attorneys' fees) of every kind and nature, arising from or in any way related to your use of Yahoo! APIs. You understand that any fact relating to any matter covered by this release may be found to be other than now believed to be true and you accept and assume the risk of such possible differences in fact. In addition, you expressly waive and relinquish any and all rights and benefits which you may have under any other state or federal statute or common law principle of similar effect, to the fullest extent permitted by law.

    18. Hold Harmless and Indemnity.

    19. To the maximum extent permitted by applicable law, you agree to hold harmless and indemnify Yahoo! and its subsidiaries, affiliates, officers, agents, licensors, co-branders or other partners, and employees from and against any third party claim arising from or in any way related to your use of Yahoo! APIs (including anything you develop using the Yahoo! APIs), including any liability or expense arising from all claims, losses, damages (actual and/or consequential), suits, judgments, litigation costs and attorneys' fees, of every kind and nature. Yahoo! shall use good faith efforts to provide you with written notice of such claim, suit or action.

    20. General Terms.

      1. Relationship of the Parties. Notwithstanding any provision hereof, for all purposes of the Terms of Use, you and Yahoo! shall be and act independently and not as partner, joint venturer, agent, employee or employer of the other. You shall not have any authority to assume or create any obligation for or on behalf of Yahoo!, express or implied, and you shall not attempt to bind Yahoo! to any contract.

      2. Invalidity of Specific Terms. If any provision of the Terms of Use is found by a court of competent jurisdiction to be invalid, the parties nevertheless agree that the court should endeavor to give effect to the parties' intentions as reflected in the provision and the other provisions of such documents remain in full force and effect.

      3. Location of Lawsuit and Choice of Law. The Terms of Use and the relationship between you and Yahoo! shall be governed by the laws of the State of California without regard to its conflict of law provisions. You and Yahoo! agree to submit to the personal jurisdiction of the courts located within the county of Santa Clara, California.

      4. No Waiver of Rights by Yahoo!. Yahoo!'s failure to exercise or enforce any right or provision of the Terms of Use shall not constitute a waiver of such right or provision.

      5. Miscellaneous. The section headings and subheadings contained in this agreement are included for convenience only, and shall not limit or otherwise affect the terms of the Terms of Use. Any construction or interpretation to be made of the Terms of Use shall not be construed against the drafter. The Terms of Use constitute the entire agreement between Yahoo! and you with respect to the subject matter hereof.