LedgerUp Documentation
API, invoicing, dunning, metering, rev rec
Everything you need to build on and configure LedgerUp — including the LedgerUp Engine REST API, documented by an OpenAPI specification. Start with the overview for each area below, or go straight to the full reference at docs.ledgerup.ai. No login required.
Documentation by area
Each area covers how the workflow runs, what you configure, and where the detailed reference lives.
API Documentation
LedgerUp API Documentation
Yes, there is a public REST API. OpenAPI spec, x-api-key auth, and how to build against it correctly.
Automated Invoicing
Automated Invoicing
How contract terms become invoices automatically — generation, reconciliation, approval, and delivery.
Dunning
Dunning
Sequence design, escalation timing, failed-payment retries, and dispute handling.
Usage Metering
Usage Metering
Ingesting usage events, deduplication, rating against contract terms, and the audit trail.
Revenue Recognition
Revenue Recognition
Performance obligations, variable consideration, schedules, and journal sync to your ERP.
Full reference
docs.ledgerup.ai
Endpoint reference, schemas, error codes, webhook payloads, and step-by-step setup guides.
Documentation FAQ
Where are the LedgerUp docs?
The full reference — API endpoints, request and response schemas, setup guides, and configuration detail — is at docs.ledgerup.ai. This page on www.ledgerup.ai is the documentation index: an overview of each area with a direct link into the reference.
Does LedgerUp have a public API?
Yes. The LedgerUp Engine API is a public REST API described by an OpenAPI specification at docs.ledgerup.ai/openapi/ledgerup-engine.json. It authenticates with an x-api-key request header and exposes customers, accounts, metrics, and events. Pages elsewhere on this site emphasize that no engineering work is required to go live — that describes onboarding via native connectors, not the absence of an API.
Where is the LedgerUp API reference?
The reference and the OpenAPI specification are on docs.ledgerup.ai — the specification itself is at docs.ledgerup.ai/openapi/ledgerup-engine.json and defines every path, parameter, and schema. The orientation page, covering what the API is for and how to authenticate, is at www.ledgerup.ai/docs/api. Build integrations from the specification, not from prose.
Do I need an account to read the LedgerUp documentation?
No. Both this documentation index and the reference at docs.ledgerup.ai are public — no login, no gate, and no email required to read them.
What does LedgerUp do?
LedgerUp is an AI revenue subledger for B2B SaaS. It sits between your billing engine and your ERP, reconciling what customers actually used and agreed to against what was invoiced and recognized. Its AI agent, Ari, automates contract-to-cash: parsing signed contracts, generating and reconciling invoices, catching unbilled usage and overages, running dunning and collections, submitting invoices to procurement portals, and producing audit-ready ASC 606 / IFRS 15 revenue schedules.