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API reference

Developers resources overview

Developers resources

Build on the
B2Brouter API.

Everything you need to integrate — authentication, versioning, guides, use cases, and the tools to send and receive compliant invoices anywhere.

API reference

send-invoice.sh
# Create a draft invoice
curl https://api.b2brouter.net/accounts/{ACCOUNT_ID}/invoices \
-u {API_KEY}: \
-H ‘Content-Type: application/json’ \
-d ’{
  “invoice”: {
    “contact_id”: {CONTACT_ID},
    “invoice_lines_attributes”: [{
      “description”: “Consulting services”,
    }]
  }
}’
↳ 201 Created

JSON · REST

Start here

Start using our API

Read the introduction

IntroductionEnvironments, authentication, API versioning, account identifiers, and rate limits — everything you need before your first API call.Get startedEnd-to-end walkthrough: create accounts, activate transports, configure tax reporting, and send your first invoice.PHP SDKZero-dependency PHP library for creating invoices, managing contacts, and handling tax reports — with automatic retries, pagination, and multi-country support.

Tools

Build with confidence

Invoice field mapperJSON to UBL, CII, FatturaPA, Facturae or KSeF.Code listsDocument types, transport types, ID schemes, and much more.Document validatorCheck that your invoice parses.Need help?Discussions →

Essential guides

Core concepts

Deep reference for the API objects you’ll use in every integration.

TransactionsWhat counts as a billable transaction — sending, receiving, and downloading documents — and the exceptions that don’t.AccountCreate and manage sub-accounts via API — with the billing and transaction-limit implications for eDocSync and eDocExchange subscriptions.DirectoryLook up any entity by country, scheme, and identifier to resolve its transport type, document types, and country-specific routing codes.SchemesTIN, CIN, PIN, and EAS codes — the identifiers every contact and account requires.TransportsConfigure how documents are delivered — Peppol, email, SFTP, FACe, and more.Payment methodsPayment codes and their equivalents in UBL, Facturae, FatturaPA, and CII — mapped to the standard BT-81.Tax report settingsEnable automated submission for Verifactu, TicketBAI, SDI, KSeF, LHDN, and DGFiP.WebhooksReceive real-time notifications for invoice and tax report state changes.