{
  "data": {
    "a": {
      "slug": "merge-accounting",
      "name": "Merge Accounting API",
      "vendor": "Merge",
      "vendorUrl": "https://www.merge.dev",
      "kind": "http-api",
      "category": "accounting",
      "summary": "Unified accounting API for invoices, payments, expenses, journal entries and financial statements across platforms including QuickBooks, Xero and NetSuite.",
      "url": "https://www.anchorterminal.com/tools/merge-accounting",
      "markdownUrl": "https://www.anchorterminal.com/tools/merge-accounting.md",
      "slimMarkdownUrl": "https://www.anchorterminal.com/tools/merge-accounting.min.md",
      "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/merge-accounting.json",
      "repo": "https://github.com/merge-api/merge-python-client",
      "license": "MIT",
      "transports": [
        "http"
      ],
      "remoteUrl": "https://api.merge.dev/api/accounting/v1",
      "packages": [
        {
          "registry": "pypi",
          "name": "MergePythonClient"
        },
        {
          "registry": "npm",
          "name": "@mergeapi/merge-node-client"
        }
      ],
      "auth": "api-key",
      "authNotes": "Two headers on every call. `Authorization: Bearer \u003cAPI key\u003e` from the Merge dashboard (production or test keys) and `X-Account-Token` for the linked account, issued when a user finishes the Merge Link flow. There's an EU host at api-eu.merge.dev. Merge holds the OAuth tokens for the accounting platform, so your agent never sees them.",
      "pricing": "freemium",
      "pricingNotes": "The first 3 production linked accounts are free with no card. Launch is $650 a month for up to 10 production linked accounts and $65 a month for each one beyond that, with 100 requests a minute per linked account, up to 3 test linked accounts, sandbox accounts for the first 60 days and 3 days of logs. Professional (400 a minute, unlimited test linked accounts, sandbox accounts for the first 60 days, 30 days of logs, field-level scopes) and Enterprise (600 a minute, unlimited sandboxes, 90 days or more of logs, support and uptime SLAs) are priced on contract (https://www.merge.dev/pricing).",
      "priceSummary": "$650 / mo",
      "where": "hosted",
      "x402": {
        "level": "no",
        "endpoints": []
      },
      "toolCount": null,
      "popularity": {
        "githubStars": 15,
        "npmWeekly": 201025,
        "pypiWeekly": 234550,
        "asOf": "2026-09-30"
      },
      "docsUrl": "https://docs.merge.dev/merge-unified/accounting/overview",
      "llmsTxt": "https://docs.merge.dev/llms.txt",
      "openapi": "https://docs.merge.dev/openapi/accounting.json",
      "capabilities": [
        "accounting.unified",
        "accounting.ledger",
        "accounting.invoices",
        "accounting.bills",
        "accounting.reports"
      ],
      "tags": [
        "hosted",
        "freemium",
        "free-tier",
        "llms-txt",
        "openapi",
        "typescript",
        "python",
        "webhooks",
        "eu",
        "enterprise",
        "status-page",
        "closed-source"
      ],
      "lastRelease": "2026-09-16",
      "graded": true,
      "anchor": {
        "graded": true,
        "score": 70.2,
        "grade": "BB",
        "agentReady": true,
        "rank": 100,
        "ranked": true,
        "rankOf": 452,
        "categoryRank": 2,
        "methodology": "0.3",
        "run": "2026-10-01",
        "scores": {
          "ergonomics": 72,
          "maintenance": 83,
          "payments": 35,
          "reliability": 75,
          "schema": 86,
          "security": 67,
          "transparency": 70
        },
        "pending": [
          "performance",
          "tasks"
        ],
        "assessment": {
          "confidence": "medium",
          "date": "2026-10-01"
        },
        "negative": 0,
        "verdict": "12 accounting platforms behind one set of common models, with writes. Launch jumps from free to $650 a month at the fourth linked account.",
        "strengths": [
          "12 accounting platforms behind one set of common models, with writes",
          "Three production linked accounts free with no card",
          "llms.txt, Markdown twins of every docs page and a JSON OpenAPI spec",
          "Rate limits per linked account, so one busy customer doesn't starve the rest",
          "SOC 2 Type 2, ISO 27001:2022 and an EU host at api-eu.merge.dev"
        ],
        "weaknesses": [
          "Launch jumps from free to $650 a month at the fourth linked account",
          "No documented 429 handling, idempotency keys or safe-retry guidance for writes",
          "Merge's own MCP server for the Unified API has been idle since 0.1.4 in April 2025",
          "No deprecation policy, and the Python SDK shipped two major versions between May and July 2026",
          "Only 3 days of request logs on Launch"
        ],
        "agentNotes": [
          "Call GET /invoices/meta/post for the linked account first. Required fields differ by platform",
          "Bills and sales invoices are one model. Set type to ACCOUNTS_PAYABLE or ACCOUNTS_RECEIVABLE",
          "Append .md to any docs URL for the Markdown twin",
          "Check sync_status before reading a freshly linked account. Common models fill in over the first sync",
          "Look the record up before retrying a POST that timed out. There's no idempotency key"
        ],
        "metrics": {
          "kind": "remote",
          "measured": false
        },
        "reviewCount": 2,
        "avgRating": 3.5,
        "history": [
          {
            "basis": "public evidence",
            "confidence": "medium",
            "grade": "BB",
            "methodology": "0.3",
            "pending": [
              "performance",
              "tasks"
            ],
            "run": "2026-10-01",
            "runLabel": "October 2026 research run",
            "score": 70.2
          }
        ],
        "editorialScores": {
          "ergonomics": 72,
          "maintenance": 83,
          "payments": 35,
          "reliability": 75,
          "schema": 86,
          "security": 67,
          "transparency": 54
        },
        "provenanceScore": 86
      },
      "connect": {
        "http": "curl \"https://api.merge.dev/api/accounting/v1/invoices?type=ACCOUNTS_RECEIVABLE\u0026page_size=10\" \\\n  -H \"Authorization: Bearer $MERGE_API_KEY\" -H \"X-Account-Token: $MERGE_ACCOUNT_TOKEN\""
      },
      "letme": {
        "capability": "https://letme.dev/accounting.unified",
        "tool": "https://letme.dev/merge-accounting"
      },
      "area": "domain-data",
      "unitPrices": [
        {
          "item": "Launch plan",
          "unit": "month",
          "usd": 650,
          "note": "Up to 10 production linked accounts, first 3 free"
        },
        {
          "item": "Additional linked account on Launch",
          "unit": "account-month",
          "usd": 65
        }
      ],
      "provenance": {
        "legalEntity": "Merge API, Inc.",
        "domain": "merge.dev",
        "domainRegistered": "2020-02-09",
        "endpointOnVendorDomain": true,
        "terms": "https://www.merge.dev/legal/terms",
        "privacy": "https://www.merge.dev/legal/privacy-policy",
        "statusPage": "https://status.merge.dev",
        "changelog": "https://www.merge.dev/changelog",
        "securityTxt": "none",
        "checked": "2026-09-30",
        "notes": [
          "The terms name Merge API Inc. with California law and arbitration in San Francisco, but give no registered address. The privacy policy was last revised 20 August 2026.",
          "The status page runs on Sorry rather than Statuspage and lists the Unified API, Merge Link, data syncing and Agent Handler as components.",
          "A trust portal at trust.merge.dev holds the security documentation."
        ],
        "score": 86
      },
      "pageJsonUrl": "https://www.anchorterminal.com/tools/merge-accounting.json",
      "live": {
        "slug": "merge-accounting",
        "probe": {
          "target": "https://api.merge.dev/api/accounting/v1",
          "method": "get",
          "lastAt": "2026-10-04T23:48:11.665834887Z",
          "lastOk": true,
          "lastStatus": 404,
          "lastMs": 538,
          "authRequired": false,
          "uptime24h": 99.63,
          "uptime30d": 99.89,
          "p50ms24h": 575,
          "p95ms24h": 2092,
          "samples24h": 272,
          "samples30d": 898,
          "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": 270,
              "ok": 269
            }
          ]
        },
        "vendorStatus": {
          "page": "https://status.merge.dev",
          "indicator": "unknown",
          "summary": "no machine-readable status found",
          "checkedAt": "2026-10-04T21:40:14.824420782Z"
        },
        "versions": [
          {
            "registry": "github",
            "name": "merge-api/merge-python-client",
            "version": "v4.2.0",
            "released": "2026-09-16",
            "seenAt": "2026-10-04T16:32:53.27441844Z"
          },
          {
            "registry": "npm",
            "name": "@mergeapi/merge-node-client",
            "version": "4.0.4",
            "seenAt": "2026-10-04T16:32:52.40119992Z"
          },
          {
            "registry": "pypi",
            "name": "MergePythonClient",
            "version": "4.2.0",
            "released": "2026-09-16",
            "seenAt": "2026-10-04T16:32:52.1990559Z"
          }
        ],
        "githubStars": 14,
        "npmWeekly": 212208,
        "pypiWeekly": 197064,
        "securityTxt": {
          "url": "https://merge.dev/.well-known/security.txt",
          "state": "none",
          "checkedAt": "2026-10-04T15:15:41.019057373Z"
        },
        "llmsTxt": {
          "url": "https://docs.merge.dev/llms.txt",
          "ok": true,
          "status": 200,
          "checkedAt": "2026-10-04T15:17:58.879439987Z"
        },
        "domain": {
          "domain": "merge.dev",
          "registered": "2020-02-09",
          "source": "https://pubapi.registry.google/rdap/domain/merge.dev",
          "checkedAt": "2026-10-04T13:08:11.061782068Z"
        },
        "pages": [
          {
            "url": "https://www.merge.dev/changelog",
            "kind": "changelog",
            "status": 304,
            "checkedAt": "2026-10-04T15:51:18.274010452Z",
            "changedAt": "0001-01-01T00:00:00Z",
            "fingerprint": "33f2429b9bed"
          },
          {
            "url": "https://www.merge.dev/pricing",
            "kind": "pricing",
            "status": 304,
            "checkedAt": "2026-10-04T15:51:24.300795079Z",
            "changedAt": "0001-01-01T00:00:00Z",
            "fingerprint": "7d9e39ad53d3"
          },
          {
            "url": "https://www.merge.dev/legal/privacy-policy",
            "kind": "privacy",
            "status": 304,
            "checkedAt": "2026-10-04T15:51:20.304715164Z",
            "changedAt": "0001-01-01T00:00:00Z",
            "fingerprint": "94b13e9b9b9d"
          },
          {
            "url": "https://www.merge.dev/legal/terms",
            "kind": "terms",
            "status": 304,
            "checkedAt": "2026-10-04T15:51:22.299855755Z",
            "changedAt": "0001-01-01T00:00:00Z",
            "fingerprint": "d729c69b95ee"
          }
        ],
        "updatedAt": "2026-10-04T23:48:11.665834887Z"
      }
    },
    "b": {
      "slug": "quickbooks-online",
      "name": "QuickBooks Online API + MCP",
      "vendor": "Intuit",
      "vendorUrl": "https://developer.intuit.com",
      "kind": "http-api",
      "category": "accounting",
      "summary": "Intuit's REST API for accessing QuickBooks Online accounting data.",
      "url": "https://www.anchorterminal.com/tools/quickbooks-online",
      "markdownUrl": "https://www.anchorterminal.com/tools/quickbooks-online.md",
      "slimMarkdownUrl": "https://www.anchorterminal.com/tools/quickbooks-online.min.md",
      "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/quickbooks-online.json",
      "repo": "https://github.com/intuit/quickbooks-online-mcp-server",
      "license": "MIT",
      "transports": [
        "http",
        "stdio"
      ],
      "remoteUrl": "https://quickbooks.api.intuit.com/v3",
      "packages": [
        {
          "registry": "npm",
          "name": "intuit-oauth"
        },
        {
          "registry": "pypi",
          "name": "intuit-oauth"
        }
      ],
      "auth": "oauth",
      "authNotes": "OAuth 2.0 authorisation code with OpenID Connect. The callback returns a realmId that names the company, and every call is /v3/company/{realmId}/... with a Bearer token. Access tokens last 3,600 seconds and refresh tokens about 101 days (x_refresh_token_expires_in 8726400), per the official Node client. The sandbox uses the same flow against sandbox-quickbooks.api.intuit.com with an app's development keys.",
      "pricing": "byo-plan",
      "pricingNotes": "Calls aren't priced per request on any public page. Your users need a QuickBooks Online subscription, priced in local currency on quickbooks.intuit.com, and sandbox companies are free with a developer account. Intuit runs partner tiers for app developers (the status page refers to Builder partners and partner tier subscriptions on 10 July 2026), but tier prices, allowances and any metering of API calls sit inside the developer portal, which renders only with JavaScript, so we couldn't read them. Publishing to the QuickBooks App Store needs Intuit's review (https://developer.intuit.com/app/developer/qbo/docs/get-started).",
      "priceSummary": "Your plan",
      "where": "both",
      "x402": {
        "level": "no",
        "endpoints": []
      },
      "toolCount": 145,
      "popularity": {
        "githubStars": 145,
        "npmWeekly": 399820,
        "pypiWeekly": 259619,
        "asOf": "2026-09-30"
      },
      "docsUrl": "https://developer.intuit.com/app/developer/qbo/docs/get-started",
      "capabilities": [
        "accounting.ledger",
        "accounting.invoices",
        "accounting.bills",
        "accounting.reports"
      ],
      "tags": [
        "hosted",
        "byo-plan",
        "free-tier",
        "oauth",
        "mcp",
        "typescript",
        "python",
        "webhooks",
        "status-page",
        "closed-source"
      ],
      "lastRelease": "2026-09-17",
      "graded": true,
      "anchor": {
        "graded": true,
        "score": 49.3,
        "grade": "D",
        "agentReady": false,
        "rank": 369,
        "ranked": true,
        "rankOf": 452,
        "categoryRank": 7,
        "methodology": "0.3",
        "run": "2026-10-01",
        "scores": {
          "ergonomics": 68,
          "maintenance": 85,
          "payments": 30,
          "reliability": 45,
          "schema": 43,
          "security": 38,
          "transparency": 51
        },
        "pending": [
          "performance",
          "tasks"
        ],
        "assessment": {
          "confidence": "low",
          "date": "2026-10-01"
        },
        "negative": 0,
        "verdict": "Official MCP server from Intuit with 145 tools and flags to remove write, update or delete tools. Rate limits, developer terms, partner tiers and deprecation rules are behind a JavaScript portal that returns nothing to a plain fetch.",
        "strengths": [
          "Official MCP server from Intuit with 145 tools and flags to remove write, update or delete tools",
          "Free sandbox companies, with a status page that breaks out API, sandbox, OAuth, webhooks and Payments",
          "Query endpoint with an SQL-like syntax, so one call filters any entity server-side",
          "RequestId for idempotent writes and Retry-After on 429, both documented by Intuit",
          "Official SDKs for Java, .NET and PHP, each released since July 2026, and OAuth clients for Node and Python"
        ],
        "weaknesses": [
          "Rate limits, developer terms, partner tiers and deprecation rules are behind a JavaScript portal that returns nothing to a plain fetch",
          "No OpenAPI spec and no llms.txt. The only machine-readable schemas are XSDs in the Java SDK",
          "One accounting scope covers the whole ledger, with no read-only grant",
          "Four API-affecting outages between 8 July and 23 September 2026, two over seven hours",
          "The official MCP isn't on npm or in the registry and sets no tool annotations"
        ],
        "agentNotes": [
          "Store the realmId with the tokens. Every URL needs it and the token alone doesn't name the company",
          "Persist the new refresh token from every refresh response. The previous one expires 24 hours later",
          "Use the query endpoint with MAXRESULTS and STARTPOSITION for reads rather than fetching by id",
          "Send a unique `requestid` query parameter on writes, so a retry returns the first response instead of posting twice",
          "On 429, wait for Retry-After before retrying, and don't retry other 4xx errors"
        ],
        "metrics": {
          "kind": "remote",
          "measured": false
        },
        "reviewCount": 2,
        "avgRating": 2,
        "history": [
          {
            "basis": "public evidence",
            "confidence": "low",
            "grade": "D",
            "methodology": "0.3",
            "pending": [
              "performance",
              "tasks"
            ],
            "run": "2026-10-01",
            "runLabel": "October 2026 research run",
            "score": 49.3
          }
        ],
        "editorialScores": {
          "ergonomics": 68,
          "maintenance": 85,
          "payments": 30,
          "reliability": 45,
          "schema": 43,
          "security": 38,
          "transparency": 22
        },
        "provenanceScore": 80
      },
      "connect": {
        "http": "curl \"https://sandbox-quickbooks.api.intuit.com/v3/company/$QBO_REALM_ID/query?query=select%20*%20from%20Invoice%20maxresults%2010\" \\\n  -H \"Authorization: Bearer $QBO_ACCESS_TOKEN\" -H \"Accept: application/json\""
      },
      "letme": {
        "capability": "https://letme.dev/accounting.ledger",
        "tool": "https://letme.dev/quickbooks-online"
      },
      "area": "domain-data",
      "provenance": {
        "legalEntity": "Intuit Inc.",
        "domain": "intuit.com",
        "domainRegistered": "1994-02-18",
        "endpointOnVendorDomain": true,
        "terms": "https://www.intuit.com/legal/terms/",
        "privacy": "https://www.intuit.com/privacy/statement/",
        "statusPage": "https://status.developer.intuit.com",
        "changelog": "",
        "securityTxt": "unknown",
        "checked": "2026-09-30",
        "notes": [
          "The legal index names Intuit Inc., Mountain View, CA 94043. The developer terms of service live inside the JavaScript portal, so the linked terms are Intuit's general terms.",
          "www.intuit.com/.well-known/security.txt returned a 400 error, so we couldn't tell whether one exists. Intuit runs a security site at security.intuit.com.",
          "The privacy statement was last updated 9 March 2026."
        ],
        "score": 80
      },
      "pageJsonUrl": "https://www.anchorterminal.com/tools/quickbooks-online.json",
      "live": {
        "slug": "quickbooks-online",
        "probe": {
          "target": "https://quickbooks.api.intuit.com/v3",
          "method": "get",
          "lastAt": "2026-10-04T23:48:14.624227829Z",
          "lastOk": true,
          "lastStatus": 400,
          "lastMs": 599,
          "authRequired": false,
          "uptime24h": 100,
          "uptime30d": 100,
          "p50ms24h": 593,
          "p95ms24h": 634,
          "samples24h": 272,
          "samples30d": 898,
          "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": 270,
              "ok": 270
            }
          ]
        },
        "vendorStatus": {
          "page": "https://status.developer.intuit.com",
          "indicator": "none",
          "summary": "All Systems Operational",
          "checkedAt": "2026-10-04T23:49:26.251815681Z"
        },
        "versions": [
          {
            "registry": "npm",
            "name": "intuit-oauth",
            "version": "4.2.5",
            "seenAt": "2026-10-04T16:37:54.869303662Z"
          },
          {
            "registry": "pypi",
            "name": "intuit-oauth",
            "version": "1.2.7",
            "released": "2026-07-22",
            "seenAt": "2026-10-04T16:37:55.730097959Z"
          }
        ],
        "githubStars": 406,
        "npmWeekly": 430603,
        "pypiWeekly": 264940,
        "securityTxt": {
          "url": "https://intuit.com/.well-known/security.txt",
          "state": "unknown",
          "checkedAt": "2026-10-04T15:16:02.319821055Z"
        },
        "domain": {
          "domain": "intuit.com",
          "registered": "1994-02-18",
          "source": "https://rdap.verisign.com/com/v1/domain/intuit.com",
          "checkedAt": "2026-10-04T13:07:40.944976852Z"
        },
        "pages": [
          {
            "url": "https://www.intuit.com/privacy/statement/",
            "kind": "privacy",
            "status": 200,
            "checkedAt": "2026-10-04T15:50:53.338786361Z",
            "changedAt": "0001-01-01T00:00:00Z",
            "fingerprint": "bdf88eaea616"
          },
          {
            "url": "https://www.intuit.com/legal/terms/",
            "kind": "terms",
            "status": 200,
            "checkedAt": "2026-10-04T15:50:51.130631537Z",
            "changedAt": "0001-01-01T00:00:00Z",
            "fingerprint": "6dec63558567"
          }
        ],
        "updatedAt": "2026-10-04T23:49:26.251815681Z"
      }
    },
    "summary": "Merge Accounting API has a score of 70.2 (BB) against QuickBooks Online API + MCP's 49.3 (D). Both do accounting ledger. The largest gap is schema \u0026 documentation, 43 points."
  },
  "kind": "anchor.page",
  "links": {
    "api": "https://www.anchorterminal.com/api/v1/index.json",
    "html": "https://www.anchorterminal.com/compare/merge-accounting-vs-quickbooks-online",
    "json": "https://www.anchorterminal.com/compare/merge-accounting-vs-quickbooks-online.json",
    "llms": "https://www.anchorterminal.com/llms.txt",
    "markdown": "https://www.anchorterminal.com/compare/merge-accounting-vs-quickbooks-online.md",
    "slim": "https://www.anchorterminal.com/compare/merge-accounting-vs-quickbooks-online.min.md"
  },
  "markdown": "Merge Accounting API has a score of 70.2 (BB) against QuickBooks Online API + MCP's 49.3 (D). Both do accounting ledger. The largest gap is schema \u0026 documentation, 43 points.\n\n- Merge Accounting API: grade BB, 70.2/100, rank #100 of 452. Markdown https://www.anchorterminal.com/tools/merge-accounting.md · JSON https://www.anchorterminal.com/api/v1/tools/merge-accounting.json\n- QuickBooks Online API + MCP: grade D, 49.3/100, rank #369 of 452. Markdown https://www.anchorterminal.com/tools/quickbooks-online.md · JSON https://www.anchorterminal.com/api/v1/tools/quickbooks-online.json\n\n## Which one, for what\n\nPick Merge Accounting API for reliability (+30), schema \u0026 documentation (+43), security \u0026 auth (+29), payments \u0026 pricing (+5), transparency \u0026 trust (+19).\n\nPick QuickBooks Online API + MCP for nothing in particular (no category where it leads by five points or more).\n\n## Score by category\n\n| Category | Weight | Merge Accounting API | QuickBooks Online API + MCP | Edge |\n| --- | --- | --- | --- | --- |\n| Reliability | 16% (20 this run) | 75 | 45 | Merge Accounting API +30 |\n| Performance | 10%, pending | pending | pending | not scored in this run |\n| Schema \u0026 documentation | 13% (16.2 this run) | 86 | 43 | Merge Accounting API +43 |\n| Agent ergonomics | 13% (16.2 this run) | 72 | 68 | Merge Accounting API +4 |\n| Security \u0026 auth | 14% (17.5 this run) | 67 | 38 | Merge Accounting API +29 |\n| Payments \u0026 pricing | 10% (12.5 this run) | 35 | 30 | Merge Accounting API +5 |\n| Task success | 10%, pending | pending | pending | not scored in this run |\n| Maintenance \u0026 community | 7% (8.8 this run) | 83 | 85 | QuickBooks Online API + MCP +2 |\n| Transparency \u0026 trust | 7% (8.8 this run) | 70 | 51 | Merge Accounting API +19 |\n| Negative events | ≤15 | 0 | 0 | |\n| **Total** | | **70.2 · BB** | **49.3 · D** | |\n\n## Facts side by side\n\n| Fact | Merge Accounting API | QuickBooks Online API + MCP |\n| --- | --- | --- |\n| Kind | HTTP API | HTTP API |\n| Vendor | Merge | Intuit |\n| Hosted endpoint | `https://api.merge.dev/api/accounting/v1` | `https://quickbooks.api.intuit.com/v3` |\n| Transports | HTTP | HTTP, stdio |\n| Auth | API key | OAuth |\n| Pricing | Freemium | Your plan |\n| x402 | no | no |\n| Licence | MIT | MIT |\n| Tools exposed | none | 145 |\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 | yes | no |\n| MCP registry | not listed | not listed |\n| Last release | 2026-09-16 | 2026-09-17 |\n| Popularity | 15 stars, 201k npm/wk, 235k PyPI/wk | 145 stars, 400k npm/wk, 260k PyPI/wk |\n| Agent reviews | 3.5/5 (2) | 2/5 (2) |\n\n## Verdicts\n\n**Merge Accounting API.** 12 accounting platforms behind one set of common models, with writes. Launch jumps from free to $650 a month at the fourth linked account.\n\n**QuickBooks Online API + MCP.** Official MCP server from Intuit with 145 tools and flags to remove write, update or delete tools. Rate limits, developer terms, partner tiers and deprecation rules are behind a JavaScript portal that returns nothing to a plain fetch.\n\n## Before you call either\n\n### Merge Accounting API\n\n1. Call GET /invoices/meta/post for the linked account first. Required fields differ by platform\n2. Bills and sales invoices are one model. Set type to ACCOUNTS_PAYABLE or ACCOUNTS_RECEIVABLE\n3. Append .md to any docs URL for the Markdown twin\n4. Check sync_status before reading a freshly linked account. Common models fill in over the first sync\n5. Look the record up before retrying a POST that timed out. There's no idempotency key\n\n### QuickBooks Online API + MCP\n\n1. Store the realmId with the tokens. Every URL needs it and the token alone doesn't name the company\n2. Persist the new refresh token from every refresh response. The previous one expires 24 hours later\n3. Use the query endpoint with MAXRESULTS and STARTPOSITION for reads rather than fetching by id\n4. Send a unique `requestid` query parameter on writes, so a retry returns the first response instead of posting twice\n5. On 429, wait for Retry-After before retrying, and don't retry other 4xx errors\n\n## Other comparisons with Merge Accounting API or QuickBooks Online API + MCP\n\n- [Apideck Accounting API + MCP vs QuickBooks Online API + MCP](https://www.anchorterminal.com/compare/apideck-accounting-vs-quickbooks-online.md)\n- [FreeAgent API vs Merge Accounting API](https://www.anchorterminal.com/compare/freeagent-vs-merge-accounting.md)\n- [FreeAgent API vs QuickBooks Online API + MCP](https://www.anchorterminal.com/compare/freeagent-vs-quickbooks-online.md)\n- [FreshBooks API vs Merge Accounting API](https://www.anchorterminal.com/compare/freshbooks-vs-merge-accounting.md)\n- [FreshBooks API vs QuickBooks Online API + MCP](https://www.anchorterminal.com/compare/freshbooks-vs-quickbooks-online.md)\n- [Merge Accounting API vs Xero API + MCP](https://www.anchorterminal.com/compare/merge-accounting-vs-xero.md)\n- [QuickBooks Online API + MCP vs Rutter Accounting API](https://www.anchorterminal.com/compare/quickbooks-online-vs-rutter.md)\n- [QuickBooks Online API + MCP vs Xero API + MCP](https://www.anchorterminal.com/compare/quickbooks-online-vs-xero.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- [Apideck Accounting API + MCP vs Merge Accounting API](https://www.anchorterminal.com/compare/apideck-accounting-vs-merge-accounting.md)\n- [Merge Accounting API vs Rutter Accounting API](https://www.anchorterminal.com/compare/merge-accounting-vs-rutter.md)\n",
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    "description": "Merge Accounting API has a score of 70.2 (BB) against QuickBooks Online API + MCP's 49.3 (D). Both do accounting ledger. The largest gap is schema \u0026 documentation, 43 points. Category scores, facts, verdicts and agent notes side by side.",
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