The response of schedule.aspx includes the match ID. For example here is the first few matches for your team:
<bbapi version='1'>
<schedule teamid='138045' season='71' retrieved='2026-02-04T23:42:22Z'>
<
match id='137825177' start='2026-01-22T22:00:00Z' type='friendly'>
<awayTeam id='138045'>
<teamName>BC Nyapu Taspa</teamName>
<score>84</score>
</awayTeam>
<homeTeam id='115566'>
<teamName>Paypueblo BC</teamName>
<score>96</score>
</homeTeam>
</match>
<
match id='137869361' start='2026-01-24T19:00:00Z' type='league.rs'>
<awayTeam id='138045'>
<teamName>BC Nyapu Taspa</teamName>
<score>94</score>
</awayTeam>
<homeTeam id='78985'>
<teamName>Club Basket Bon Pastor</teamName>
<score>115</score>
</homeTeam>
</match>
<
match id='137869372' start='2026-01-27T19:00:00Z' type='league.rs'>
<awayTeam id='75580'>
<teamName>Atomillos</teamName>
<score>100</score>
</awayTeam>
<homeTeam id='138045'>
<teamName>BC Nyapu Taspa</teamName>
<score>74</score>
</homeTeam>
</match>
[...]
</schedule>
</bbapi>