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Invoices vs orders: These guides walk through invoices (formal billing, line items, publish). The collect flow is the same for orders — use /v1/orders/* instead of /v1/invoices/* and set source_type: "ORDER" on the checkout session. See Orders and Parties & counterparties.Hosted checkout: To skip party, invoice, session, and execute steps entirely, see Hosted checkout.
End-to-end invoice collection with the standard library net/http and encoding/json.
API Reference: Obtain token · Collect

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Prerequisites

  • Go 1.21+
  • os.Getenv for DOLLR_CLIENT_ID and DOLLR_CLIENT_SECRET

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Steps

1

Client and token

package main

import (
    "bytes"
    "encoding/json"
    "net/http"
    "os"
)

const baseURL = "https://api.heydollr.app"

func obtainToken() (string, error) {
    body, _ := json.Marshal(map[string]string{
        "client_id":     os.Getenv("DOLLR_CLIENT_ID"),
        "client_secret": os.Getenv("DOLLR_CLIENT_SECRET"),
    })
    req, _ := http.NewRequest(http.MethodPost, baseURL+"/v1/jwt/client/obtain/token", bytes.NewReader(body))
    req.Header.Set("Content-Type", "application/json")
    res, err := http.DefaultClient.Do(req)
    // decode access_token from res.Body
    return "", err
}
2

POST helper

func dollrPost(path, token string, payload any) (map[string]any, error) {
    b, _ := json.Marshal(payload)
    req, _ := http.NewRequest(http.MethodPost, baseURL+path, bytes.NewReader(b))
    req.Header.Set("Authorization", "Bearer "+token)
    req.Header.Set("Content-Type", "application/json")
    res, err := http.DefaultClient.Do(req)
    // json.NewDecoder(res.Body).Decode(&out)
    return nil, err
}
Chain: parties → counterparties → invoices → items → publish.
3

Execute with idempotency key

import "github.com/google/uuid"

referenceID := uuid.New().String()
_, err = dollrPost("/v1/executions/collection", token, map[string]string{
    "session_id":         sessionID,
    "payment_account_id": paymentAccountID,
    "currency":           "USD",
    "reference_id":       referenceID,
})
4

Poll status

req, _ := http.NewRequest(http.MethodGet, baseURL+"/v1/status/collection/"+referenceID, nil)
req.Header.Set("Authorization", "Bearer "+token)

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Try it yourself

Hosted checkout

Mobile money and card on a Dollr-hosted page — fastest path.

Orders

Same collect flow with source_type: ORDER and /v1/orders/*.

Direct checkout

One API call to create source — API-embedded flow.
Last modified on May 22, 2026