Hey, the first step I would try would be to swap the order of “base” and “head” to match up with the API’s example directly. Let me know if that does not work. 

Nope, same 404 error:

$ curl -X POST -d '{"title": "Add extra version of expat", "body": "Split from #14570", "head": "mass-update-1", "base": "develop"}' -H "Content-Type: application/json" -u iarspider -i https://api.github.com/repos/iarspider/spack/pulls
HTTP/1.1 404 Not Found

Date: Fri, 14 Feb 2020 14:37:27 GMT

Content-Type: application/json; charset=utf-8

Content-Length: 116

Server: GitHub.com

Status: 404 Not Found

X-RateLimit-Limit: 5000

X-RateLimit-Remaining: 4999

X-RateLimit-Reset: 1581694647

X-OAuth-Scopes:

X-Accepted-OAuth-Scopes:

X-GitHub-Media-Type: github.v3; format=json

Access-Control-Expose-Headers: ETag, Link, Location, Retry-After, X-GitHub-OTP, X-RateLimit-Limit, X-RateLimit-Remaining, X-RateLimit-Reset, X-OAuth-Scopes, X-Accepted-OAuth-Scopes, X-Poll-Interval, X-GitHub-Media-Type

Access-Control-Allow-Origin: *

Strict-Transport-Security: max-age=31536000; includeSubdomains; preload

X-Frame-Options: deny

X-Content-Type-Options: nosniff

X-XSS-Protection: 1; mode=block

Referrer-Policy: origin-when-cross-origin, strict-origin-when-cross-origin

Content-Security-Policy: default-src 'none'

Vary: Accept-Encoding, Accept, X-Requested-With

X-GitHub-Request-Id: EBEC:2D3DF:64A6B7:7A2C41:5E46B0A7
{

"message": "Not Found",

"documentation_url": "https://developer.github.com/v3/pulls/#create-a-pull-request"

}

I think the issue may be that you aren’t authenticated. I am pretty sure you need to use a GitHub Personal Access token in order to do what you’re trying to do (since theoretically right now all you are providing is a user name, which anyone who sees’s your public repo could access and subsequently make the same API request as you). The 404 is likely saying “hey, someone is trying to access this command without telling us who they really are so we don’t want to get involved in that. Let’s tell them as little as possible (for security reasons) and return a 404”. 

https://developer.github.com/v3/guides/getting-started/#authentication

I am using personal token, I’m just not showing it.

Yup, had to add “access public repositories” to the token. Wish it was documented somewhere :slight_smile: