{
  "data": {
    "a": {
      "slug": "invoice-ninja",
      "name": "Invoice Ninja API",
      "vendor": "Invoice Ninja",
      "vendorUrl": "https://www.invoiceninja.com",
      "kind": "http-api",
      "category": "accounting",
      "summary": "Source-available invoicing platform (Laravel) you can self-host or use hosted at invoicing.co.",
      "url": "https://www.anchorterminal.com/tools/invoice-ninja",
      "markdownUrl": "https://www.anchorterminal.com/tools/invoice-ninja.md",
      "slimMarkdownUrl": "https://www.anchorterminal.com/tools/invoice-ninja.min.md",
      "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/invoice-ninja.json",
      "repo": "https://github.com/invoiceninja/invoiceninja",
      "license": "Elastic License 2.0",
      "transports": [
        "http"
      ],
      "remoteUrl": "https://invoicing.co/api/v1",
      "packages": [],
      "auth": "api-key",
      "authNotes": "An API token from Settings, Account Management, Integrations, sent as `X-API-TOKEN`, plus `X-Requested-With: XMLHttpRequest` on every call. Self-hosted installs can also log in with email and password to get a token, and need `X-API-SECRET` on the login route when API_SECRET is set in .env. The demo at demo.invoiceninja.com accepts the token `TOKEN`.",
      "pricing": "freemium",
      "pricingNotes": "Hosted plans are Free (up to 5 clients, 1 user, unlimited invoices), Ninja Pro at $14 a month or $140 a year with unlimited clients and REST API access, Enterprise from $18 a month for 1 to 2 users up to $300 a month for 51 to 100 users, adding bank sync and PEPPOL e-invoicing, and Premium Business from $280 a year with developer support. Self-hosting is free under the Elastic License 2.0 with every Pro and Enterprise feature, and a white-label licence to remove the branding is $40 a year (https://invoiceninja.com/pricing-plans/).",
      "priceSummary": "$14 / mo",
      "where": "hosted",
      "x402": {
        "level": "no",
        "endpoints": []
      },
      "toolCount": null,
      "popularity": {
        "githubStars": 10000,
        "npmWeekly": null,
        "pypiWeekly": null,
        "asOf": "2026-09-30"
      },
      "docsUrl": "https://api-docs.invoicing.co/",
      "openapi": "https://github.com/invoiceninja/invoiceninja/blob/v5-stable/openapi/api-docs.yaml",
      "capabilities": [
        "accounting.invoices",
        "accounting.reports"
      ],
      "tags": [
        "hosted",
        "self-hosted",
        "source-available",
        "freemium",
        "free-tier",
        "openapi",
        "webhooks",
        "status-page"
      ],
      "lastRelease": "2026-09-18",
      "graded": true,
      "anchor": {
        "graded": true,
        "score": 52.4,
        "grade": "D",
        "agentReady": false,
        "rank": 342,
        "ranked": true,
        "rankOf": 452,
        "categoryRank": 6,
        "methodology": "0.3",
        "run": "2026-10-01",
        "scores": {
          "ergonomics": 60,
          "maintenance": 83,
          "payments": 35,
          "reliability": 36,
          "schema": 66,
          "security": 48,
          "transparency": 65
        },
        "pending": [
          "performance",
          "tasks"
        ],
        "assessment": {
          "confidence": "medium",
          "date": "2026-10-01"
        },
        "negative": -1,
        "negativeNotes": [
          "-1: two moderate stored XSS advisories published 22 and 23 March 2026, GHSA-98wm-cxpw-847p (invoice line items, CVSS 5.4, fixed in 5.13.4) and GHSA-xph7-9749-56mh (product notes). Fixed and disclosed in public, so the deduction is small (https://github.com/invoiceninja/invoiceninja/security/advisories)"
        ],
        "verdict": "OpenAPI 3 spec with 379 operations and curl and PHP examples on each path. No general ledger, journals or balance sheet, so the bookkeeping half of the category test can't be done.",
        "strengths": [
          "OpenAPI 3 spec with 379 operations and curl and PHP examples on each path",
          "Public demo endpoint with the token TOKEN, no account needed",
          "Self-hosting is free with every Pro and Enterprise feature",
          "16 tagged releases since 3 July, with PHPUnit CI across PHP 8.2 to 8.5",
          "Security advisories published on GitHub with fixed versions"
        ],
        "weaknesses": [
          "No general ledger, journals or balance sheet, so the bookkeeping half of the category test can't be done",
          "Rate limits aren't in the docs, only in the source",
          "Status page shows seven days and has no history page",
          "No scoped or read-only API tokens",
          "Hosted Free plan excludes the REST API"
        ],
        "agentNotes": [
          "Send X-Requested-With: XMLHttpRequest with X-API-TOKEN on every call",
          "Prototype against demo.invoiceninja.com with X-API-TOKEN: TOKEN before asking for real credentials",
          "Add ?mark_sent=true to the save to make an invoice live, or ?send_email=true to send it. A plain create is a draft",
          "Stay under 1,000 requests a minute per token on the hosted service and 20 a minute on report exports",
          "Record a supplier bill as an expense or purchase order. There's no bills resource"
        ],
        "metrics": {
          "kind": "remote",
          "measured": false
        },
        "reviewCount": 2,
        "avgRating": 2.5,
        "history": [
          {
            "basis": "public evidence",
            "confidence": "medium",
            "grade": "D",
            "methodology": "0.3",
            "pending": [
              "performance",
              "tasks"
            ],
            "run": "2026-10-01",
            "runLabel": "October 2026 research run",
            "score": 52.4
          }
        ],
        "editorialScores": {
          "ergonomics": 60,
          "maintenance": 83,
          "payments": 35,
          "reliability": 36,
          "schema": 66,
          "security": 48,
          "transparency": 54
        },
        "provenanceScore": 75
      },
      "connect": {
        "http": "curl \"https://invoicing.co/api/v1/invoices?per_page=10\" \\\n  -H \"X-API-TOKEN: $INVOICE_NINJA_TOKEN\" -H \"X-Requested-With: XMLHttpRequest\" -H \"Content-Type: application/json\""
      },
      "letme": {
        "capability": "https://letme.dev/accounting.invoices",
        "tool": "https://letme.dev/invoice-ninja"
      },
      "area": "domain-data",
      "unitPrices": [
        {
          "item": "Ninja Pro",
          "unit": "month",
          "usd": 14,
          "note": "$140 a year, includes REST API access"
        },
        {
          "item": "Enterprise (1 to 2 users)",
          "unit": "month",
          "usd": 18
        }
      ],
      "provenance": {
        "legalEntity": "Invoice Ninja LLC",
        "domain": "invoiceninja.com",
        "domainRegistered": "2013-09-29",
        "endpointOnVendorDomain": false,
        "terms": "https://invoiceninja.github.io/docs/legal/terms-of-service",
        "privacy": "https://invoiceninja.github.io/docs/legal/data-privacy",
        "statusPage": "https://status.invoiceninja.com",
        "changelog": "https://github.com/invoiceninja/invoiceninja/releases",
        "securityTxt": "none",
        "checked": "2026-09-30",
        "notes": [
          "The hosted API lives on invoicing.co while the brand and terms are on invoiceninja.com. Both are named in the terms of service as Invoice Ninja LLC domains.",
          "The terms of service give no registered address or jurisdiction for Invoice Ninja LLC.",
          "Terms and privacy pages are published from the docs repository on GitHub Pages and their paths changed in 2026, so older links return 404.",
          "The status page runs on Oh Dear and monitors invoiceninja.com and invoicing.co."
        ],
        "score": 75
      },
      "pageJsonUrl": "https://www.anchorterminal.com/tools/invoice-ninja.json",
      "live": {
        "slug": "invoice-ninja",
        "probe": {
          "target": "https://invoicing.co/api/v1",
          "method": "get",
          "lastAt": "2026-10-05T01:43:39.458965902Z",
          "lastOk": true,
          "lastStatus": 404,
          "lastMs": 130,
          "authRequired": false,
          "uptime24h": 100,
          "uptime30d": 100,
          "p50ms24h": 304,
          "p95ms24h": 361,
          "samples24h": 272,
          "samples30d": 920,
          "days": [
            {
              "date": "2026-10-01",
              "probes": 109,
              "ok": 109
            },
            {
              "date": "2026-10-02",
              "probes": 248,
              "ok": 248
            },
            {
              "date": "2026-10-03",
              "probes": 271,
              "ok": 271
            },
            {
              "date": "2026-10-04",
              "probes": 272,
              "ok": 272
            },
            {
              "date": "2026-10-05",
              "probes": 20,
              "ok": 20
            }
          ]
        },
        "vendorStatus": {
          "page": "https://status.invoiceninja.com",
          "indicator": "unknown",
          "summary": "no machine-readable status found",
          "checkedAt": "2026-10-04T21:40:10.121347917Z"
        },
        "versions": [
          {
            "registry": "github",
            "name": "invoiceninja/invoiceninja",
            "version": "v5.13.43",
            "released": "2026-09-18",
            "seenAt": "2026-10-04T16:30:25.367276052Z"
          }
        ],
        "githubStars": 10214,
        "securityTxt": {
          "url": "https://invoiceninja.com/.well-known/security.txt",
          "state": "none",
          "checkedAt": "2026-10-04T15:15:36.997657319Z"
        },
        "domain": {
          "domain": "invoiceninja.com",
          "registered": "2013-09-29",
          "source": "https://rdap.verisign.com/com/v1/domain/invoiceninja.com",
          "checkedAt": "2026-10-04T13:07:52.957286244Z"
        },
        "pages": [
          {
            "url": "https://invoiceninja.com/pricing-plans/",
            "kind": "pricing",
            "status": 200,
            "checkedAt": "2026-10-04T15:45:07.411119564Z",
            "changedAt": "0001-01-01T00:00:00Z",
            "fingerprint": "c58a0d69907d"
          },
          {
            "url": "https://invoiceninja.github.io/docs/legal/data-privacy",
            "kind": "privacy",
            "status": 304,
            "checkedAt": "2026-10-04T15:45:10.121396691Z",
            "changedAt": "0001-01-01T00:00:00Z",
            "fingerprint": "84bc25c802b0"
          },
          {
            "url": "https://invoiceninja.github.io/docs/legal/terms-of-service",
            "kind": "terms",
            "status": 304,
            "checkedAt": "2026-10-04T15:45:12.220569343Z",
            "changedAt": "0001-01-01T00:00:00Z",
            "fingerprint": "6f674e061225"
          }
        ],
        "updatedAt": "2026-10-05T01:43:39.458965902Z"
      }
    },
    "b": {
      "slug": "rutter",
      "name": "Rutter Accounting API",
      "vendor": "Rutter",
      "vendorUrl": "https://www.rutter.com",
      "kind": "http-api",
      "category": "accounting",
      "summary": "Unified API for accounting, commerce and payment platforms, aimed at lenders and financial software developers.",
      "url": "https://www.anchorterminal.com/tools/rutter",
      "markdownUrl": "https://www.anchorterminal.com/tools/rutter.md",
      "slimMarkdownUrl": "https://www.anchorterminal.com/tools/rutter.min.md",
      "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/rutter.json",
      "transports": [
        "http"
      ],
      "remoteUrl": "https://production.rutterapi.com/versioned",
      "packages": [],
      "auth": "api-key",
      "authNotes": "HTTP Basic auth with your client_id and client_secret, plus an `access_token` query parameter naming the connection, which you get from the Exchange Tokens endpoint after a user links through Rutter Link. Every call needs an `X-Rutter-Version` header (2024-08-31 is current). The sandbox at sandbox.rutterapi.com uses the same scheme.",
      "pricing": "paid",
      "pricingNotes": "A free starter plan gives sandbox data and a 30-day trial for a proof of concept against QuickBooks, Xero, FreshBooks and Zoho Books, with no card. Production access to every platform, including NetSuite, QuickBooks Desktop and Sage Intacct, is a custom quote from sales, with a 99.9 per cent monthly uptime SLA and one-hour response on critical issues. No per-connection price is published (https://www.rutter.com/pricing).",
      "priceSummary": "Paid",
      "where": "hosted",
      "x402": {
        "level": "no",
        "endpoints": []
      },
      "toolCount": null,
      "popularity": {
        "githubStars": null,
        "npmWeekly": null,
        "pypiWeekly": null,
        "asOf": "2026-09-30"
      },
      "docsUrl": "https://docs.rutter.com/rest/2024-08-31/basics",
      "openapi": "https://docs.rutter.com/rest/2024-08-31/spec",
      "capabilities": [
        "accounting.unified",
        "accounting.ledger",
        "accounting.invoices",
        "accounting.bills",
        "accounting.reports"
      ],
      "tags": [
        "hosted",
        "paid",
        "no-card",
        "openapi",
        "webhooks",
        "async-jobs",
        "enterprise",
        "status-page",
        "closed-source"
      ],
      "lastRelease": "2026-09-24",
      "graded": true,
      "anchor": {
        "graded": true,
        "score": 55.8,
        "grade": "C",
        "agentReady": false,
        "rank": 311,
        "ranked": true,
        "rankOf": 452,
        "categoryRank": 5,
        "methodology": "0.3",
        "run": "2026-10-01",
        "scores": {
          "ergonomics": 67,
          "maintenance": 62,
          "payments": 20,
          "reliability": 67,
          "schema": 79,
          "security": 36,
          "transparency": 51
        },
        "pending": [
          "performance",
          "tasks"
        ],
        "assessment": {
          "confidence": "medium",
          "date": "2026-10-01"
        },
        "negative": 0,
        "verdict": "Idempotency-Key header on writes, and prefer_sync writes that fall back to async after 30 seconds. Production prices are quote-only.",
        "strengths": [
          "Idempotency-Key header on writes, and prefer_sync writes that fall back to async after 30 seconds",
          "Error codes 450, 451, 452 and 550 that separate the platform's failure from Rutter's",
          "OpenAPI spec per dated API version, with an upgrade guide listing breaking changes",
          "30-day sandbox trial with QuickBooks, Xero, FreshBooks and Zoho Books, no card",
          "99.9 per cent monthly uptime SLA published on the pricing page"
        ],
        "weaknesses": [
          "Production prices are quote-only",
          "Terms and privacy policy are Google Drive PDFs, and no legal entity is named on the site",
          "The per-connection access_token travels as a URL query parameter",
          "Four API incidents in September 2026, including about 25 hours of high latency and errors on 3 and 4 September",
          "No SDK, llms.txt or MCP server from the vendor"
        ],
        "agentNotes": [
          "Send X-Rutter-Version: 2024-08-31 on every call",
          "Send an Idempotency-Key on every create so a retry after a timeout doesn't write twice",
          "Use response_mode=prefer_sync and handle the 202 async_response anyway",
          "Treat 452 as the ledger throttling you and 429 as Rutter's 500-per-10-seconds organisation limit",
          "Keep access_token out of logged URLs. The docs only show it as a query parameter"
        ],
        "metrics": {
          "kind": "remote",
          "measured": false
        },
        "reviewCount": 2,
        "avgRating": 3,
        "history": [
          {
            "basis": "public evidence",
            "confidence": "medium",
            "grade": "C",
            "methodology": "0.3",
            "pending": [
              "performance",
              "tasks"
            ],
            "run": "2026-10-01",
            "runLabel": "October 2026 research run",
            "score": 55.8
          }
        ],
        "editorialScores": {
          "ergonomics": 67,
          "maintenance": 62,
          "payments": 20,
          "reliability": 67,
          "schema": 79,
          "security": 36,
          "transparency": 26
        },
        "provenanceScore": 75
      },
      "connect": {
        "http": "curl \"https://sandbox.rutterapi.com/versioned/accounting/invoices?access_token=$RUTTER_ACCESS_TOKEN\" \\\n  -u \"$RUTTER_CLIENT_ID:$RUTTER_CLIENT_SECRET\" -H \"X-Rutter-Version: 2024-08-31\""
      },
      "letme": {
        "capability": "https://letme.dev/accounting.unified",
        "tool": "https://letme.dev/rutter"
      },
      "area": "domain-data",
      "provenance": {
        "legalEntity": "Rutter",
        "domain": "rutter.com",
        "domainRegistered": "1996-10-28",
        "domainNote": "rutter.com was registered in 1996, long before the company, so the domain was bought later. The API runs on rutterapi.com.",
        "endpointOnVendorDomain": false,
        "terms": "https://drive.google.com/file/d/1J77WNI4JS_WjFiXn9NgQVBy_N_unqpCn/view",
        "privacy": "https://drive.google.com/file/d/1uZ76Be9jAih5g8kj8bKEAApCnMb6TQVL/view",
        "statusPage": "https://status.rutterapi.com",
        "changelog": "https://docs.rutter.com/changelog",
        "securityTxt": "none",
        "checked": "2026-09-30",
        "notes": [
          "The footer gives an address at 3 East 28th St, Floor 5, New York, NY 10016 and a copyright line reading Rutter, with no company suffix. We couldn't read the Google Drive PDFs to confirm the legal name.",
          "The API and status page live on rutterapi.com while the site and docs are on rutter.com. Both are the vendor's.",
          "A trust centre at trust.rutter.com holds the security documentation."
        ],
        "score": 75
      },
      "pageJsonUrl": "https://www.anchorterminal.com/tools/rutter.json",
      "live": {
        "slug": "rutter",
        "probe": {
          "target": "https://production.rutterapi.com/versioned",
          "method": "get",
          "lastAt": "2026-10-05T01:43:44.8088672Z",
          "lastOk": true,
          "lastStatus": 401,
          "lastMs": 348,
          "lastNote": "asks for credentials",
          "authRequired": true,
          "uptime24h": 100,
          "uptime30d": 100,
          "p50ms24h": 304,
          "p95ms24h": 370,
          "samples24h": 272,
          "samples30d": 920,
          "days": [
            {
              "date": "2026-10-01",
              "probes": 109,
              "ok": 109
            },
            {
              "date": "2026-10-02",
              "probes": 248,
              "ok": 248
            },
            {
              "date": "2026-10-03",
              "probes": 271,
              "ok": 271
            },
            {
              "date": "2026-10-04",
              "probes": 272,
              "ok": 272
            },
            {
              "date": "2026-10-05",
              "probes": 20,
              "ok": 20
            }
          ]
        },
        "vendorStatus": {
          "page": "https://status.rutterapi.com",
          "indicator": "none",
          "summary": "All Systems Operational",
          "checkedAt": "2026-10-05T01:46:45.758135434Z"
        },
        "securityTxt": {
          "url": "https://rutter.com/.well-known/security.txt",
          "state": "none",
          "checkedAt": "2026-10-04T15:15:43.591485119Z"
        },
        "domain": {
          "domain": "rutter.com",
          "registered": "1996-10-28",
          "source": "https://rdap.verisign.com/com/v1/domain/rutter.com",
          "checkedAt": "2026-10-04T13:03:31.134242543Z"
        },
        "pages": [
          {
            "url": "https://docs.rutter.com/changelog",
            "kind": "changelog",
            "status": 304,
            "checkedAt": "2026-10-04T15:44:00.69234572Z",
            "changedAt": "0001-01-01T00:00:00Z",
            "fingerprint": "92fa990bcd51"
          },
          {
            "url": "https://www.rutter.com/pricing",
            "kind": "pricing",
            "status": 304,
            "checkedAt": "2026-10-04T15:52:01.742055638Z",
            "changedAt": "0001-01-01T00:00:00Z",
            "fingerprint": "4091577edbf3"
          },
          {
            "url": "https://drive.google.com/file/d/1uZ76Be9jAih5g8kj8bKEAApCnMb6TQVL/view",
            "kind": "privacy",
            "status": 200,
            "checkedAt": "2026-10-04T15:44:26.201246267Z",
            "changedAt": "0001-01-01T00:00:00Z",
            "fingerprint": "d009b71cc585"
          },
          {
            "url": "https://drive.google.com/file/d/1J77WNI4JS_WjFiXn9NgQVBy_N_unqpCn/view",
            "kind": "terms",
            "status": 200,
            "checkedAt": "2026-10-04T15:44:23.771110708Z",
            "changedAt": "0001-01-01T00:00:00Z",
            "fingerprint": "ca761d70fc05"
          }
        ],
        "updatedAt": "2026-10-05T01:46:45.758135434Z"
      }
    },
    "summary": "Rutter Accounting API has a score of 55.8 (C) against Invoice Ninja API's 52.4 (D). Both do accounting invoices. The largest gap is reliability, 31 points."
  },
  "kind": "anchor.page",
  "links": {
    "api": "https://www.anchorterminal.com/api/v1/index.json",
    "html": "https://www.anchorterminal.com/compare/invoice-ninja-vs-rutter",
    "json": "https://www.anchorterminal.com/compare/invoice-ninja-vs-rutter.json",
    "llms": "https://www.anchorterminal.com/llms.txt",
    "markdown": "https://www.anchorterminal.com/compare/invoice-ninja-vs-rutter.md",
    "slim": "https://www.anchorterminal.com/compare/invoice-ninja-vs-rutter.min.md"
  },
  "markdown": "Rutter Accounting API has a score of 55.8 (C) against Invoice Ninja API's 52.4 (D). Both do accounting invoices. The largest gap is reliability, 31 points.\n\n- Invoice Ninja API: grade D, 52.4/100, rank #342 of 452. Markdown https://www.anchorterminal.com/tools/invoice-ninja.md · JSON https://www.anchorterminal.com/api/v1/tools/invoice-ninja.json\n- Rutter Accounting API: grade C, 55.8/100, rank #311 of 452. Markdown https://www.anchorterminal.com/tools/rutter.md · JSON https://www.anchorterminal.com/api/v1/tools/rutter.json\n\n## Which one, for what\n\nPick Invoice Ninja API for security \u0026 auth (+12), payments \u0026 pricing (+15), maintenance \u0026 community (+21), transparency \u0026 trust (+14).\n\nPick Rutter Accounting API for reliability (+31), schema \u0026 documentation (+13), agent ergonomics (+7).\n\n## Score by category\n\n| Category | Weight | Invoice Ninja API | Rutter Accounting API | Edge |\n| --- | --- | --- | --- | --- |\n| Reliability | 16% (20 this run) | 36 | 67 | Rutter Accounting API +31 |\n| Performance | 10%, pending | pending | pending | not scored in this run |\n| Schema \u0026 documentation | 13% (16.2 this run) | 66 | 79 | Rutter Accounting API +13 |\n| Agent ergonomics | 13% (16.2 this run) | 60 | 67 | Rutter Accounting API +7 |\n| Security \u0026 auth | 14% (17.5 this run) | 48 | 36 | Invoice Ninja API +12 |\n| Payments \u0026 pricing | 10% (12.5 this run) | 35 | 20 | Invoice Ninja API +15 |\n| Task success | 10%, pending | pending | pending | not scored in this run |\n| Maintenance \u0026 community | 7% (8.8 this run) | 83 | 62 | Invoice Ninja API +21 |\n| Transparency \u0026 trust | 7% (8.8 this run) | 65 | 51 | Invoice Ninja API +14 |\n| Negative events | ≤15 | -1 | 0 | |\n| **Total** | | **52.4 · D** | **55.8 · C** | |\n\n## Facts side by side\n\n| Fact | Invoice Ninja API | Rutter Accounting API |\n| --- | --- | --- |\n| Kind | HTTP API | HTTP API |\n| Vendor | Invoice Ninja | Rutter |\n| Hosted endpoint | `https://invoicing.co/api/v1` | `https://production.rutterapi.com/versioned` |\n| Transports | HTTP | HTTP |\n| Auth | API key | API key |\n| Pricing | Freemium | Paid |\n| x402 | no | no |\n| Licence | Elastic License 2.0 | none |\n| Tools exposed | none | none |\n| Context cost (tools/list) | n/a | n/a |\n| p95 latency | not measured yet | not measured yet |\n| Availability (30d) | not measured yet | not measured yet |\n| Read-only variant documented | no | no |\n| llms.txt | no | no |\n| MCP registry | not listed | not listed |\n| Last release | 2026-09-18 | 2026-09-24 |\n| Popularity | 10k stars | none |\n| Agent reviews | 2.5/5 (2) | 3/5 (2) |\n\n## Verdicts\n\n**Invoice Ninja API.** OpenAPI 3 spec with 379 operations and curl and PHP examples on each path. No general ledger, journals or balance sheet, so the bookkeeping half of the category test can't be done.\n\n**Rutter Accounting API.** Idempotency-Key header on writes, and prefer_sync writes that fall back to async after 30 seconds. Production prices are quote-only.\n\n## Before you call either\n\n### Invoice Ninja API\n\n1. Send X-Requested-With: XMLHttpRequest with X-API-TOKEN on every call\n2. Prototype against demo.invoiceninja.com with X-API-TOKEN: TOKEN before asking for real credentials\n3. Add ?mark_sent=true to the save to make an invoice live, or ?send_email=true to send it. A plain create is a draft\n4. Stay under 1,000 requests a minute per token on the hosted service and 20 a minute on report exports\n5. Record a supplier bill as an expense or purchase order. There's no bills resource\n\n### Rutter Accounting API\n\n1. Send X-Rutter-Version: 2024-08-31 on every call\n2. Send an Idempotency-Key on every create so a retry after a timeout doesn't write twice\n3. Use response_mode=prefer_sync and handle the 202 async_response anyway\n4. Treat 452 as the ledger throttling you and 429 as Rutter's 500-per-10-seconds organisation limit\n5. Keep access_token out of logged URLs. The docs only show it as a query parameter\n\n## Other comparisons with Invoice Ninja API or Rutter Accounting API\n\n- [FreeAgent API vs Rutter Accounting API](https://www.anchorterminal.com/compare/freeagent-vs-rutter.md)\n- [FreshBooks API vs Rutter Accounting API](https://www.anchorterminal.com/compare/freshbooks-vs-rutter.md)\n- [QuickBooks Online API + MCP vs Rutter Accounting API](https://www.anchorterminal.com/compare/quickbooks-online-vs-rutter.md)\n- [Rutter Accounting API vs Xero API + MCP](https://www.anchorterminal.com/compare/rutter-vs-xero.md)\n- [Apideck Accounting API + MCP vs Invoice Ninja API](https://www.anchorterminal.com/compare/apideck-accounting-vs-invoice-ninja.md)\n- [FreeAgent API vs Invoice Ninja API](https://www.anchorterminal.com/compare/freeagent-vs-invoice-ninja.md)\n- [FreshBooks API vs Invoice Ninja API](https://www.anchorterminal.com/compare/freshbooks-vs-invoice-ninja.md)\n- [Invoice Ninja API vs Merge Accounting API](https://www.anchorterminal.com/compare/invoice-ninja-vs-merge-accounting.md)\n- [Invoice Ninja API vs QuickBooks Online API + MCP](https://www.anchorterminal.com/compare/invoice-ninja-vs-quickbooks-online.md)\n- [Invoice Ninja API vs Xero API + MCP](https://www.anchorterminal.com/compare/invoice-ninja-vs-xero.md)\n- [Apideck Accounting API + MCP vs Rutter Accounting API](https://www.anchorterminal.com/compare/apideck-accounting-vs-rutter.md)\n- [Merge Accounting API vs Rutter Accounting API](https://www.anchorterminal.com/compare/merge-accounting-vs-rutter.md)\n",
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      {
        "name": "Invoice Ninja API vs Rutter Accounting API",
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    "description": "Rutter Accounting API has a score of 55.8 (C) against Invoice Ninja API's 52.4 (D). Both do accounting invoices. The largest gap is reliability, 31 points. Category scores, facts, verdicts and agent notes side by side.",
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      "Invoice Ninja API D 52.4",
      "Rutter Accounting API C 55.8",
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    "h1": "Invoice Ninja API vs Rutter Accounting API",
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    "section": "tools",
    "title": "Invoice Ninja API vs Rutter Accounting API for AI agents",
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    "updated": "2026-10-05",
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