# Ironfang Finance E-Invoicing Billing API

**Canonical:** https://apis.io/apis/ironfang/ironfang-finance-billing-api/  
**Provider:** Ironfang — https://apis.io/providers/ironfang/  
**Base URL:** https://api.ironfang.com/finance  
**Documentation:** https://ironfang.com/docs/finance

Ironfang Finance E-Invoicing Billing API is one of 62 APIs that [Ironfang](https://apis.io/providers/ironfang/) publishes on the [APIs.io](https://apis.io/) network, described by a machine-readable OpenAPI specification. Tagged areas include Billing. The published artifact set on APIs.io includes an OpenAPI specification, API documentation, authentication docs, rate-limit docs, a changelog, and a getting-started guide.

Ironfang Finance usage as the organisation's billing account meters it, beside Finance's own content-free record. Payment, limits and invoices belong to the account at /billing/v1.

## Operations (1)

| Method | Path | Summary |
|---|---|---|
| GET | `/v1/einvoices/usage` | Read Ironfang Finance usage for a month |

## Machine-readable artifacts (10)

- **OpenAPI** — https://raw.githubusercontent.com/api-evangelist/ironfang/refs/heads/main/openapi/ironfang-finance-billing-api-openapi.yml
- **OpenAPI** — https://api.ironfang.com/finance/openapi.yaml
- **Documentation** — https://ironfang.com/docs/finance
- **Authentication** — https://ironfang.com/docs/finance#api
- **RateLimits** — https://ironfang.com/docs/finance#limits
- **ChangeLog** — https://ironfang.com/finance/changelog
- **GettingStarted** — https://ironfang.com/finance/.well-known/api-onboarding
- **PostmanCollection** — https://ironfang.com/finance/postman.collection.json
- **ErrorCatalog** — https://ironfang.com/problems
- **Pricing** — https://ironfang.com/pricing#finance

## Other Ironfang APIs (12)

- [Ironfang Account API](https://apis.io/apis/ironfang/ironfang-account-api/)
- [Ironfang Batches API](https://apis.io/apis/ironfang/ironfang-batches-api/)
- [Ironfang Destinations API](https://apis.io/apis/ironfang/ironfang-destinations-api/)
- [Ironfang Jobs API](https://apis.io/apis/ironfang/ironfang-jobs-api/)
- [Ironfang Render API](https://apis.io/apis/ironfang/ironfang-render-api/)
- [Ironfang Signed URLs API](https://apis.io/apis/ironfang/ironfang-signed-urls-api/)
- [Ironfang Templates API](https://apis.io/apis/ironfang/ironfang-templates-api/)
- [Ironfang Audit Artifacts API](https://apis.io/apis/ironfang/ironfang-audit-artifacts-api/)
- [Ironfang Audit Audits API](https://apis.io/apis/ironfang/ironfang-audit-audits-api/)
- [Ironfang Audit Events API](https://apis.io/apis/ironfang/ironfang-audit-events-api/)
- [Ironfang Audit Export Destinations API](https://apis.io/apis/ironfang/ironfang-audit-exportdestinations-api/)
- [Ironfang Audit Exports API](https://apis.io/apis/ironfang/ironfang-audit-exports-api/)

## Tags

Billing

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/apis/ironfang/ironfang-finance-billing-api/). The API's provider profile, Kin Score and agent-readiness rating are at https://apis.io/providers/ironfang/.