invoiceninjars

An async Rust client for the Invoice Ninja v5 API.

Requires Rust 1.88 or newer.

Pre-1.0: no API stability promise. Pin an exact version and expect breaking changes in minor releases; CHANGELOG.md records them. GOALS.md covers what the crate is for and what it is not.

Development happens on Gitea; the GitHub copy is a read-only mirror. Anything pushed to GitHub is overwritten by the next sync, so please open issues and pull requests on Gitea.

Development

Enter the dev shell (Rust toolchain via rust-overlay):

nix develop

The dev toolchain is pinned in flake.nix rather than tracking latest stable, so it only moves deliberately. To check the crate still builds on the declared minimum of 1.88:

nix develop .#msrv --command cargo test

Usage

use invoiceninjars::{InvoiceNinjaClient, models::ListParams};

// Hosted app:
let client = InvoiceNinjaClient::hosted(std::env::var("IN_API_TOKEN")?)?;

// Self-hosted — note the base URL must include the `/api/v1` suffix:
let client = InvoiceNinjaClient::new(
    "https://your-domain.example/api/v1",
    std::env::var("IN_API_TOKEN")?,
)?;

let clients = client.list_clients(&ListParams::new().per_page(50)).await?;

ListParams has typed setters for the parameters every list endpoint accepts, plus param for the per-resource filters:

let unpaid = client
    .list_invoices(
        &ListParams::new()
            .per_page(100)
            .sort("date|desc")
            .param("client_id", "abc123")
            .param("client_status", "unpaid"),
    )
    .await?;

List endpoints are paginated. list_* returns a single page; list_all_* follows pagination and returns every matching record:

let all_clients = client.list_all_clients(&ListParams::new()).await?;

Every request carries a 60-second deadline by default, since reqwest applies none of its own, and transient failures are retried up to 3 times with exponential backoff. Both are configurable:

use std::time::Duration;
use invoiceninjars::RetryPolicy;

let client = InvoiceNinjaClient::hosted(token)?
    .with_timeout(Duration::from_secs(300))
    .with_retry_policy(RetryPolicy::new(5));

Note that the timeout applies to each attempt, not to the call as a whole; RetryPolicy::max_elapsed (120 seconds by default) is what bounds the total.

Retrying is deliberately conservative about POST. A POST that fails with a 5xx or times out is not replayed, because the server may have applied it before the response was lost and a repeat would create a second invoice or payment. A 429 is retried for any method, since the server states it refused the request without processing it. Pass RetryPolicy::none() to disable retrying entirely.

Run the example (requires IN_API_TOKEN, optionally IN_BASE_URL):

IN_API_TOKEN=... cargo run --example list_clients

Coverage

Every one of the API's 34 resource groups, plus users — 371 methods. Each resource has list, list_all, get, create, update, delete, and (where the API offers one) bulk:

Area	Resources
Billing	Clients, Invoices, Quotes, Credits, Payments, Products, Purchase Orders
Recurring	Recurring Invoices, Recurring Quotes, Recurring Expenses, Subscriptions
Work	Projects, Tasks, Task Statuses, Task Schedulers
Spend	Expenses, Expense Categories, Vendors, Bank Transactions
Banking	Bank Integrations, Bank Transaction Rules, Company Gateways, Client Gateway Tokens
Admin	Companies, Users, Group Settings, Tokens, System Logs
Settings	Tax Rates, Payment Terms, Webhooks, Designs, Locations, Tags

Plus documents, entity actions and PDF downloads — by record id, or by invitation key for the PDF and XML a given contact receives — reports, charts, search, statics, email sending, refunds, and health checks.

See COVERAGE.md for the full endpoint-by-endpoint inventory, including everything that is deliberately not wrapped and why.

Models cover a curated subset of each schema; any field the API returns that isn't modeled explicitly (including custom_value1..4 and custom_surcharge1..4) is preserved in that model's extra map, so a get followed by an update round-trips without dropping data.

Beyond CRUD

Bulk actions return the affected records. They're available on every resource the API gives a /bulk route — all but companies, system logs, and client gateway tokens:

let archived = client.bulk_invoices("archive", &["abc123", "def456"]).await?;

Some endpoints — reading or writing an individual user, /users/bulk, purging a client or company — sit behind the API's password_protected middleware and need the account password on top of a valid token:

let client = InvoiceNinjaClient::hosted(std::env::var("IN_API_TOKEN")?)?
    .with_api_password(std::env::var("IN_API_PASSWORD")?)?;

let user = client.get_user("abc123").await?;

Invoices, quotes, credits, and purchase orders also support per-entity actions and PDF rendering:

let invoice = client.mark_invoice_sent("abc123").await?;
let pdf: Vec<u8> = client.download_invoice("abc123").await?;

// The bulk `download` action streams one merged PDF. Available for quotes,
// credits, and purchase orders too.
let merged: Vec<u8> = client.download_invoices(&["abc123", "def456"]).await?;

Documents are attached through the record they belong to, since that is the only way the API creates one. Sixteen resources support it, as upload_client, upload_invoice, upload_expense, and so on:

use invoiceninjars::FileUpload;

let receipt = FileUpload::new("receipt.pdf", std::fs::read("receipt.pdf")?)
    .mime("application/pdf");

// `Some(true)` makes the document visible to the client in the portal.
let expense = client.upload_expense("abc123", vec![receipt], Some(false)).await?;

Files are held in memory while uploading, and an upload is never retried, since a replay after a lost response would attach the file twice.

Reports return their raw export body (CSV for most of them). statics, search, and health_check return typed results; chart has no common response shape, so it decodes into any type you choose:

use serde_json::{json, Value};

let csv: Vec<u8> = client.report("invoices", &json!({"date_range": "this_year"})).await?;
let totals: Value = client.chart("totals_v2", &json!({})).await?;
let statics = client.statics().await?;

Add more resources by adding a model under src/models/ and a resource_methods! invocation in src/client.rs.