Is there any service that I could use to add deposits for cryptocurrencies?

[hoopp]

Is there any open-source project or 3rd party with reasonable fees that would allow deposits to my centralized exchange? Best with support for a wide variety of altcoins.

[Husires]

Is there any open-source project or 3rd party with reasonable fees that would allow deposits to my centralized exchange? Best with support for a wide variety of altcoins.

Your question needs more clarification. Are you looking for a bitcoin payment processor where you manage an online website, store or service, where users make altcoin or bitcoin deposits and you want it to appear as deposits to your centralized exchange?

If that's what you're looking for, this is a good list https://bitcointalk.org/index.php?topic=5444578.0
I prefer https://coingate.com/ They have better solutions except they require you to verify your identity.

If this is not what you are looking for, should you ask about a cryptocurrency wallet? Or what specifically?

[GreenStox]

There are so many bridge sites, you ask what kind of 3rd party applications?You have to ask completely because not everyone understands your thoughts.

[electronicash]

he is looking for opensource project, my guess is a wallet to which he must have bought coins from a gateway through his credit card. since you are asking for a wallet with a wide variety of altcoins, i think there are lots of these already.  Electrum and Mycelium are both supporting tokens already. a fee of $1 or 2 seems reasonable. but why ask for a 3rd party while you are about to send them to a CEX?

you can just send those BTC and tokens to the exchange without having to send them to a 3rd party no worries about transaction fees.

[mullick]

Is there any open-source project or 3rd party with reasonable fees that would allow deposits to my centralized exchange? Best with support for a wide variety of altcoins.

I hope you are not talking about a centralized exchange you own. I want to believe that is the language barrier but just to be safe, That is a terrible idea and you should stop now.

[hoopp]

Is there any open-source project or 3rd party with reasonable fees that would allow deposits to my centralized exchange? Best with support for a wide variety of altcoins.

I hope you are not talking about a centralized exchange you own. I want to believe that is the language barrier but just to be safe, That is a terrible idea and you should stop now.

No that's not a language barrier, that's exactly it. I want to expand my CEX and add blockchains like solana and arbitrum but it's too complicated so i thought about using other services. Can anyone help me? Coingate is great but 1% fee on deposit would kill my exchange.

[glendall]

No that's not a language barrier, that's exactly it. I want to expand my CEX and add blockchains like solana and arbitrum but it's too complicated so i thought about using other services. Can anyone help me? Coingate is great but 1% fee on deposit would kill my exchange.

Honestly it's a little confusing what you want,
If the CEX exchange supports the coins you mentioned, there are many probably like  Binance, Coinbase, Bybit,
I hope I didn't answer wrongly with what you meant