Getting 400 Bad Request When POSTing to Get Transaction Token - node.js

Question

I'm trying to integrate our website with Converge API with Hosted Payments Page. Here is the link to their documentation https://developer.elavon.com/#/api/eb6e9106-0172-4305-bc5a-b3ebe832f823.rcosoomi/versions/5180a9f2-741b-439c-bced-5c84a822f39b.rcosoomi/documents?converge-integration-guide/book/integration_methods/../../book/integration_methods/hosted_payments.html
I'm having troubles getting past the first step which is requesting a transaction token from their API endpoint. I'm sending a POST request from my server using axios with the correct parameters and URL, but when I try and POST i get 400 Bad Request. When I make the same request in POSTMAN I get a 200 response with the transaction token. I talked to their developers and they said that everything I was doing was correct and that nothing seemed odd within my code, so even they were stumped as to why I couldn't make a POST request to their endpoint. Obviously there is something within my code that their API is not liking, or else I wouldn't be here trying to find answers for this.
Here is how I'm making the POST request:
app.get('/converge_token_req', (request, response) => {
let params = {
ssl_merchant_id: '*****',
ssl_user_id: '*****',
ssl_pin: '*****',
ssl_transaction_type: 'ccsale',
ssl_amount: '1.00'
}
axios.post('https://api.demo.convergepay.com/hosted-payments/transaction_token', params, {
headers: { 'Content_Type' : 'application/x-www-form-urlencoded' }
}).then((res) => {
response.send(res.data)
}).catch((error) => {
console.log('there was an error getting transaction token')
response.send(error.message)
})
})
Here are the Request Headers:
I'm honestly out of ideas to try. The developers say that everything looks just fine yet I'm unable to make a successful request to their API. If anyone has any thoughts on this that would be great. Thanks!

Answer 1

This code below worked for me:
app.get('/converge_token_req', (request, response) => {
let params = {
ssl_merchant_id: '*****',
ssl_user_id: '*****',
ssl_pin: '*****',
ssl_transaction_type: 'ccsale',
ssl_amount: '1.00'
}
axios({
method: 'post',
url: 'https://api.demo.convergepay.com/hosted-payments/transaction_token',
params: params
}).then((res) => { response.send(res.data)
}).catch((error) => {
console.log('there was an error getting transaction token: ',
error)
})
})

Answer 2

I've since found out the solution to my problem. The issue here is that converge expects a x-www-form-urlencoded string that needs to be Stringified before submitting the request. I found a library that works well for this called qs and I used it like so:
let params = qs.stringify({ // need this if content_type is application/x-www-form-urlencoded
ssl_merchant_id: env.CONVERGE.MERCHANT_ID,
ssl_user_id: env.CONVERGE.USER_ID,
ssl_pin: env.CONVERGE.PIN,
ssl_transaction_type: request.query.type,
ssl_amount: request.query.amount,
ssl_email: request.query.email,
ssl_company: request.query.company,
ssl_avs_address: request.query.address,
ssl_avs_zip: request.query.zip,
ssl_description: request.query.desc,
})
axios.post('https://api.convergepay.com/hosted-payments/transaction_token', params, {
headers: {
'Content_Type' : 'application/x-www-form-urlencoded; charset=UTF-8'
}
}).then((res) => {
response.send(res.data)
}).catch((error) => {
console.log('there was an error getting transaction token')
response.send(error.message)
})
I think you could also get away with just using JSON.stringify() but this way worked for me.