Your finance stack, finally talking.
Bank feeds, card payments, accounting migration, email delivery and AI document capture — all native, all reconciled into a single ledger. No middleware, no zaps, no spreadsheet exports.
GoCardless Open Banking
Banking
Live bank feeds across the EU and UK, PSD2-authorised account-to-account reads, and direct-debit mandate management.
Stripe
Payments
Take card payments on invoices, sync payouts, and reconcile fees automatically. Supports Apple Pay, Google Pay and SCA-compliant 3DS.
SEPA Direct Debit
Payments
Collect recurring euro payments with mandate capture, pre-notifications and failure handling — backed by GoCardless.
QuickBooks Online
Accounting
One-click migration: import your chart of accounts, customers, suppliers, invoices and historical transactions in minutes.
Xero
Accounting
Two-way sync of contacts, invoices, bills and bank transactions. Choose Accel Books or Xero as the system of record.
Sage 50 / Sage Business Cloud
Accounting
Migration-grade importer for UK and Irish Sage customers — preserves audit trail, VAT codes and posting periods.
Resend
Communication
Branded transactional email for invoices, payment reminders and statements, with DKIM/SPF/DMARC out of the box.
Gmail & Microsoft 365
Communication
Send invoices from your own mailbox, then capture replies into the AI Document Inbox automatically.
AP Mailroom (inbox-to-bill)
Documents
Forward supplier PDFs to a dedicated address — we extract line items, VAT, due dates and route them to approval.
Google Drive & Dropbox
Documents
Auto-archive every issued invoice, statement and signed document to your existing storage with the same folder taxonomy you already use.
Companies Registration Office
Documents
Look up Irish and UK companies, pre-fill registered addresses and director details when creating contacts.
Lovable AI Gateway
AI
Powers the Finance Copilot, AI Document Inbox and the agent team — no third-party model keys required.
How integrations work
Connected in three steps — reconciled forever.
- 01
Authorise
Sign in with the upstream provider once. We store OAuth tokens encrypted per tenant and rotate them automatically.
- 02
Map
Pick which Accel Books accounts, contacts or tax codes the integration should write to. Sensible defaults are pre-selected.
- 03
Reconcile
Feeds run continuously. Matches happen against open invoices and bills, and exceptions land in a single review queue.
Build your own
A typed API and signed webhooks for everything we do.
Every invoice, payment, bank transaction and AI agent event is available through a JSON API authenticated with scoped API keys. Webhooks are signed with HMAC-SHA256 and replayable from the dashboard so you never lose an event during downtime.
- REST + JSON, OpenAPI spec publishedGenerate clients in any language; first-party SDKs for TypeScript and Python.
- Signed, replayable webhooks20+ event types covering invoices, payments, banking, AP and agent runs.
- Scoped API keysPer-environment, per-permission, with rolling rotation and audit-logged usage.
POST /v1/invoices
Authorization: Bearer sk_live_…
Idempotency-Key: inv_2026_03_142
{
"contact_id": "ct_8f3a…",
"currency": "EUR",
"due_date": "2026-04-15",
"items": [
{ "description": "Advisory · March",
"quantity": 8,
"unit_price": 145.00,
"tax_rate": 23 }
]
}
→ 201 Created
{
"id": "inv_01HZP…",
"number": "INV-2026-0142",
"subtotal": 1160.00,
"tax_total": 266.80,
"total": 1426.80,
"status": "draft"
}Missing something?
Tell us which tool to connect next.
We ship the integrations our customers actually ask for. Drop a note and we’ll keep you in the loop when we start scoping it.