Essentially, I want the bot to go through the channel's message history, find a message containing some particular text, and then give out the link to the message in the same channel.
Going through the documentation, I imagine I will make use of async for message in channel.history(params) but I cannot figure out how for my particular use case.
You're on the right track, you can use channel.history to get the messages. Then just compare your keyword with the message content and use jump_url to get the link to that message.
@client.command()
async def keyword(ctx, *, word: str):
channel = client.get_channel(730839966472601622)
messages = await ctx.channel.history(limit=200).flatten()
for msg in messages:
if word in msg.content:
print(msg.jump_url)