[License-discuss] Adding the curl license
Christoph Röth
Christoph.Roeth at web.de
Sat Jan 3 11:38:54 UTC 2026
Dear OSI License Discussion Forum,
I would like the curl license to be added. Th|e license has been around
for quite some time, so it can be classified as a legacy license. The
license is available at SPDX. Please find the required information
attached.|
**• Submit a copy of the license as an attachment in simple text format.**
COPYRIGHT AND PERMISSION NOTICE
Copyright (c) 1996 - 2015, Daniel Stenberg, <daniel at haxx.se>.
All rights reserved.
Permission to use, copy, modify, and distribute this software for any
purpose with or without fee is hereby granted, provided that the above
copyright notice and this permission notice appear in all copies.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF
THIRD PARTY RIGHTS. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
Except as contained in this notice, the name of a copyright holder shall
not be used in advertising or otherwise to promote the sale, use or
other dealings in this Software without prior written authorization of
the copyright holder.
**• Affirmatively *state that the license complies*with the Open Source
Definition, including specifically affirming it meets OSD 3, 5, 6 and 9.**
I can confirm that the license complies with the Open Source Definition.
3. Derived Works: Yes
5. No Discrimination Against Persons or Groups: Yes
6. No Discrimination Against Fields of Endeavor: Yes
9. License Must Not Restrict Other Software: Yes
**• Identify what projects are *already using*the license.**
The curl project itself.
**• Provide the identity and contact details of the *license steward*,
if known, and of the submitter. The OSI will try to get in touch with
the license steward if the license submitter is not the steward.**
Daniel Stenberg, <daniel at haxx.se>
**• Provide any additional information that the submitter believes would
be helpful for license review. For example, approval of the license by
Debian, the FSF or the Fedora Project would be relevant to the review
process.**
The website contains this text with detailed information about the
license, https://curl.se/docs/faq.html#license
What license does curl use exactly?
curl is released under an MIT derivative license. It is similar but not
identical to the MIT license.
The difference is considered big enough to make SPDX list it under its
own identifier: curl.
The changes done to the license that make it uniquely curl were tiny and
well-intended, but the reasons for them have been forgotten and we
strongly discourage others from doing the same thing.
**• Provide a *unique name*for the license, preferably including the
version number.**
Full name: |curl License ||(according to SPDX)|
Short identifier: |curl ||(according to SPDX)|
**• If any exist, provide the unique identifier by other projects, like
SPDX or ScanCode.**
https://spdx.org/licenses/curl.html <https://spdx.org/licenses/curl.html>
Best regards
Christoph
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