https://github.com/pvlib/pvlib-python/blob/216386ef2f2fcdcaf1b3ecb5913abdf54e9eabaf/pvlib/iotools/psm3.py#L15 According to [NREL Developer](https://developer.nrel.gov/docs/solar/nsrdb/psm3-2-2-tmy-download/) & [pvlib](https://pvlib-python.readthedocs.io/en/v0.10.5/reference/generated/pvlib.iotools.get_psm3.html#pvlib.iotools.get_psm3) docs, this should be: `https://developer.nrel.gov//api/nsrdb/v2/solar/psm3-2-2-tmy-download.format?parameters`.
pvlib-python/pvlib/iotools/psm3.py
Line 15 in 216386e
According to NREL Developer & pvlib docs, this should be:
https://developer.nrel.gov//api/nsrdb/v2/solar/psm3-2-2-tmy-download.format?parameters.