Are there any API services that allow me to send a Bitcoin transaction with OP_RETURN?
<p>I want to be able to send the minimum amount of Bitcoin required in order to write a 40 byte (roughly 80 character) message via ideally a REST API allowing me to specify a bitcoin wallet private key, the recipient bitcoin address, the fee and the message to attach to the OP_RETURN.</p>

<p>Thank you!</p>

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<p>I wish Bitcoin allowed you to send coins without having to have an API or daemon  - through http somehow would be cool. How would I create a raw transaction with a OP_RETURN in it to push to an API /tx/push using php and curl?</p>