{
  "data": {
    "a": {
      "slug": "apideck-accounting",
      "name": "Apideck Accounting API + MCP",
      "vendor": "Apideck",
      "vendorUrl": "https://www.apideck.com/accounting-api",
      "kind": "http-api",
      "category": "accounting",
      "summary": "Unified accounting API for invoices, bills, payments, journal entries and financial reports across platforms including QuickBooks, Xero and NetSuite.",
      "url": "https://www.anchorterminal.com/tools/apideck-accounting",
      "markdownUrl": "https://www.anchorterminal.com/tools/apideck-accounting.md",
      "slimMarkdownUrl": "https://www.anchorterminal.com/tools/apideck-accounting.min.md",
      "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/apideck-accounting.json",
      "repo": "https://github.com/apideck-libraries/mcp",
      "license": "MIT",
      "transports": [
        "http",
        "streamable-http",
        "stdio"
      ],
      "remoteUrl": "https://unify.apideck.com/accounting",
      "packages": [
        {
          "registry": "npm",
          "name": "@apideck/unify"
        },
        {
          "registry": "pypi",
          "name": "apideck-unify"
        },
        {
          "registry": "npm",
          "name": "@apideck/mcp"
        }
      ],
      "auth": "api-key",
      "authNotes": "Bearer API key plus `x-apideck-app-id` on every call, and `x-apideck-consumer-id` naming the customer whose connection you're using. Add `x-apideck-service-id` when a consumer has more than one accounting connection. End users authorise through Vault, which holds and refreshes their OAuth tokens. The hosted MCP takes the same three values as headers, the local server as environment variables.",
      "pricing": "paid",
      "pricingNotes": "Priced per active consumer (your customer), with a 30-day free trial on every plan. Launch is $599 a month for 25 consumers and one unified API category ($23.96 a consumer, $19.98 at 50), including webhooks, the Proxy API and the MCP server. Scale is $1,299 a month for 100 consumers and three categories ($12.99 a consumer), falling to $4,250 for 500 ($8.50 a consumer), and adds custom field mapping and data scopes. Enterprise is custom on an annual contract with SSO, a white-label Vault, vendor sandboxes and an uptime SLA. Yearly billing is 10 per cent less (https://www.apideck.com/pricing).",
      "priceSummary": "$599 / mo",
      "where": "both",
      "x402": {
        "level": "no",
        "endpoints": []
      },
      "toolCount": 362,
      "popularity": {
        "githubStars": 15,
        "npmWeekly": 42170,
        "pypiWeekly": 14248,
        "asOf": "2026-09-30"
      },
      "docsUrl": "https://developers.apideck.com/apis/accounting/reference",
      "llmsTxt": "https://developers.apideck.com/llms.txt",
      "openapi": "https://github.com/apideck-libraries/openapi-specs/blob/main/accounting.yml",
      "registryName": "com.apideck/mcp",
      "capabilities": [
        "accounting.unified",
        "accounting.ledger",
        "accounting.invoices",
        "accounting.bills",
        "accounting.reports"
      ],
      "tags": [
        "hosted",
        "paid",
        "no-card",
        "mcp",
        "llms-txt",
        "openapi",
        "typescript",
        "python",
        "webhooks",
        "enterprise",
        "eu",
        "status-page",
        "toolsets"
      ],
      "lastRelease": "2026-10-01",
      "graded": true,
      "anchor": {
        "graded": true,
        "score": 73.2,
        "grade": "BB",
        "agentReady": true,
        "rank": 60,
        "ranked": true,
        "rankOf": 452,
        "categoryRank": 1,
        "methodology": "0.3",
        "run": "2026-10-01",
        "scores": {
          "ergonomics": 88,
          "maintenance": 80,
          "payments": 30,
          "reliability": 75,
          "schema": 92,
          "security": 66,
          "transparency": 76
        },
        "pending": [
          "performance",
          "tasks"
        ],
        "assessment": {
          "confidence": "medium",
          "date": "2026-10-01"
        },
        "negative": 0,
        "verdict": "56 accounting connectors, including European ledgers such as DATEV, Exact Online, Fortnox and Twinfield. No published rate limits of Apideck's own, only connector limits mirrored in headers.",
        "strengths": [
          "56 accounting connectors, including European ledgers such as DATEV, Exact Online, Fortnox and Twinfield",
          "Dynamic MCP mode with 4 meta-tools at about 1,300 tokens, and annotations on all 362 tools",
          "Public OpenAPI spec (accounting.yml, 208 operations) with a dated changelog and a BREAKING.md for removals",
          "Identity lock on the MCP so one agent can't switch to another customer's ledger",
          "30-day trial with full access and no card"
        ],
        "weaknesses": [
          "No published rate limits of Apideck's own, only connector limits mirrored in headers",
          "No idempotency keys on writes, so a timed-out create can duplicate",
          "$599 a month for 25 customers after the trial, no free tier",
          "Vendor sandboxes only on Enterprise",
          "Registry entry stuck at 0.1.13 from April while npm is at 0.21.0"
        ],
        "agentNotes": [
          "Stay in dynamic mode and search for tools. Static mode loads all 362 schemas",
          "Start the MCP with --lock-identity (or ?lock_identity=true) when one agent serves one customer",
          "Read x-downstream-ratelimit-remaining before fanning out, and wait until x-downstream-ratelimit-reset after a 429",
          "List before you retry a create that timed out. Writes aren't idempotent and there's no idempotency key",
          "Pass fields= on list calls to cut the response to the columns you need"
        ],
        "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": 73.2
          }
        ],
        "editorialScores": {
          "ergonomics": 88,
          "maintenance": 80,
          "payments": 30,
          "reliability": 75,
          "schema": 92,
          "security": 66,
          "transparency": 61
        },
        "provenanceScore": 90
      },
      "connect": {
        "http": "curl \"https://unify.apideck.com/accounting/invoices?limit=10\" \\\n  -H \"Authorization: Bearer $APIDECK_API_KEY\" -H \"x-apideck-app-id: $APIDECK_APP_ID\" \\\n  -H \"x-apideck-consumer-id: $APIDECK_CONSUMER_ID\" -H \"x-apideck-service-id: xero\"",
        "claudeCode": "claude mcp add --transport http apideck \"https://mcp.apideck.dev/mcp?scopes=read\" --header \"Authorization: Bearer $APIDECK_API_KEY\" --header \"x-apideck-consumer-id: $APIDECK_CONSUMER_ID\" --header \"x-apideck-app-id: $APIDECK_APP_ID\"",
        "config": {
          "mcpServers": {
            "apideck": {
              "args": [
                "-y",
                "@apideck/mcp",
                "start",
                "--scope",
                "read"
              ],
              "command": "npx",
              "env": {
                "APIDECK_API_KEY": "${APIDECK_API_KEY}",
                "APIDECK_APP_ID": "${APIDECK_APP_ID}",
                "APIDECK_CONSUMER_ID": "${APIDECK_CONSUMER_ID}"
              }
            }
          }
        }
      },
      "letme": {
        "capability": "https://letme.dev/accounting.unified",
        "tool": "https://letme.dev/apideck-accounting"
      },
      "area": "domain-data",
      "unitPrices": [
        {
          "item": "Launch plan",
          "unit": "month",
          "usd": 599,
          "note": "25 consumers, 1 unified API category"
        },
        {
          "item": "Scale plan",
          "unit": "month",
          "usd": 1299,
          "note": "100 consumers, 3 categories"
        },
        {
          "item": "Consumer on Launch (25)",
          "unit": "account-month",
          "usd": 23.96
        },
        {
          "item": "Consumer on Scale (100)",
          "unit": "account-month",
          "usd": 12.99
        },
        {
          "item": "Consumer on Scale (500)",
          "unit": "account-month",
          "usd": 8.5
        }
      ],
      "provenance": {
        "legalEntity": "Apideck Inc. and Apideck NV/BV",
        "domain": "apideck.com",
        "domainRegistered": "2012-07-04",
        "endpointOnVendorDomain": true,
        "terms": "https://compliance.apideck.com/terms",
        "privacy": "https://www.iubenda.com/privacy-policy/16710317",
        "statusPage": "https://status.apideck.com",
        "changelog": "https://developers.apideck.com/changelog",
        "securityTxt": "none",
        "checked": "2026-09-30",
        "notes": [
          "The footer names Apideck Inc., 95 Third Street, San Francisco, and Apideck NV/BV, Broederminstraat 9, Antwerp, VAT BE 0689.615.164.",
          "The terms page on compliance.apideck.com shows only a loading state without JavaScript, and the privacy policy is hosted by iubenda rather than on apideck.com.",
          "The MCP endpoint is on apideck.dev while the API is on apideck.com. Both are the vendor's.",
          "One status-page incident in the last 90 days, delayed log delivery for about 2.5 hours on 2026-09-15, with API traffic unaffected."
        ],
        "score": 90
      },
      "pageJsonUrl": "https://www.anchorterminal.com/tools/apideck-accounting.json",
      "live": {
        "slug": "apideck-accounting",
        "probe": {
          "target": "https://unify.apideck.com/accounting",
          "method": "get",
          "lastAt": "2026-10-04T22:50:27.979031538Z",
          "lastOk": true,
          "lastStatus": 403,
          "lastMs": 40,
          "lastNote": "asks for credentials",
          "authRequired": true,
          "uptime24h": 100,
          "uptime30d": 100,
          "p50ms24h": 67,
          "p95ms24h": 117,
          "samples24h": 272,
          "samples30d": 887,
          "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": 259,
              "ok": 259
            }
          ]
        },
        "vendorStatus": {
          "page": "https://status.apideck.com",
          "indicator": "none",
          "summary": "All Systems Operational",
          "checkedAt": "2026-10-04T22:44:47.332744258Z"
        },
        "versions": [
          {
            "registry": "github",
            "name": "apideck-libraries/mcp",
            "version": "v0.21.0",
            "released": "2026-09-28",
            "seenAt": "2026-10-04T16:20:35.283761505Z"
          },
          {
            "registry": "mcp-registry",
            "name": "com.apideck/mcp",
            "version": "0.1.13",
            "seenAt": "2026-10-03T23:29:28.630222764Z"
          },
          {
            "registry": "npm",
            "name": "@apideck/mcp",
            "version": "0.21.0",
            "seenAt": "2026-10-04T16:20:33.720080514Z"
          },
          {
            "registry": "npm",
            "name": "@apideck/unify",
            "version": "0.52.2",
            "seenAt": "2026-10-04T16:20:33.080746348Z"
          },
          {
            "registry": "pypi",
            "name": "apideck-unify",
            "version": "0.44.0",
            "released": "2026-10-02",
            "seenAt": "2026-10-04T16:20:33.534216287Z"
          }
        ],
        "githubStars": 19,
        "npmWeekly": 40772,
        "pypiWeekly": 10695,
        "securityTxt": {
          "url": "https://apideck.com/.well-known/security.txt",
          "state": "none",
          "checkedAt": "2026-10-04T15:16:01.278396866Z"
        },
        "llmsTxt": {
          "url": "https://developers.apideck.com/llms.txt",
          "ok": true,
          "status": 200,
          "checkedAt": "2026-10-04T15:17:15.129512718Z"
        },
        "domain": {
          "domain": "apideck.com",
          "registered": "2012-07-04",
          "source": "https://rdap.verisign.com/com/v1/domain/apideck.com",
          "checkedAt": "2026-10-04T13:09:27.918141231Z"
        },
        "pages": [
          {
            "url": "https://developers.apideck.com/changelog",
            "kind": "changelog",
            "status": 304,
            "checkedAt": "2026-10-04T15:42:41.455478164Z",
            "changedAt": "0001-01-01T00:00:00Z",
            "fingerprint": "3240ab3af0c0"
          },
          {
            "url": "https://www.apideck.com/pricing",
            "kind": "pricing",
            "status": 304,
            "checkedAt": "2026-10-04T15:49:08.239438283Z",
            "changedAt": "0001-01-01T00:00:00Z",
            "fingerprint": "a97becc57c6d"
          },
          {
            "url": "https://www.iubenda.com/privacy-policy/16710317",
            "kind": "privacy",
            "status": 0,
            "checkedAt": "2026-10-04T15:50:55.193422375Z",
            "changedAt": "0001-01-01T00:00:00Z",
            "blockedByRobots": true
          },
          {
            "url": "https://compliance.apideck.com/terms",
            "kind": "terms",
            "status": 304,
            "checkedAt": "2026-10-04T15:42:07.912353084Z",
            "changedAt": "0001-01-01T00:00:00Z",
            "fingerprint": "8bf62a1f7bee"
          }
        ],
        "updatedAt": "2026-10-04T22:50:27.979031538Z"
      }
    },
    "b": {
      "slug": "freeagent",
      "name": "FreeAgent API",
      "vendor": "FreeAgent",
      "vendorUrl": "https://dev.freeagent.com",
      "kind": "http-api",
      "category": "accounting",
      "summary": "REST API for FreeAgent, the UK small-business accounting product owned by NatWest Group.",
      "url": "https://www.anchorterminal.com/tools/freeagent",
      "markdownUrl": "https://www.anchorterminal.com/tools/freeagent.md",
      "slimMarkdownUrl": "https://www.anchorterminal.com/tools/freeagent.min.md",
      "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/freeagent.json",
      "transports": [
        "http"
      ],
      "remoteUrl": "https://api.freeagent.com/v2",
      "packages": [],
      "auth": "oauth",
      "authNotes": "OAuth 2.0 authorisation code. Register an app in the developer dashboard for an OAuth identifier and secret. Access tokens last one hour, and each refresh returns a new access token and a new refresh token, so store the replacement. One token per FreeAgent user who authorised the app. The same flow works against the sandbox at api.sandbox.freeagent.com.",
      "pricing": "byo-plan",
      "pricingNotes": "The API is free under section 4.1 of the API terms, with 30 days' notice before any fee is introduced. A live company needs a FreeAgent subscription, listed at £33 a month for a limited company on freeagent.com, or free with a NatWest, Royal Bank of Scotland, Ulster Bank or Mettle business account. The sandbox is a free temporary account at signup.sandbox.freeagent.com (https://dev.freeagent.com/docs/api_terms).",
      "priceSummary": "Your plan",
      "where": "hosted",
      "x402": {
        "level": "no",
        "endpoints": []
      },
      "toolCount": null,
      "popularity": {
        "githubStars": null,
        "npmWeekly": null,
        "pypiWeekly": null,
        "asOf": "2026-09-30"
      },
      "docsUrl": "https://dev.freeagent.com/docs",
      "capabilities": [
        "accounting.ledger",
        "accounting.invoices",
        "accounting.bills",
        "accounting.reports"
      ],
      "tags": [
        "hosted",
        "byo-plan",
        "free-tier",
        "oauth",
        "uk",
        "status-page",
        "closed-source"
      ],
      "lastRelease": "2026-09-01",
      "graded": true,
      "anchor": {
        "graded": true,
        "score": 57.6,
        "grade": "C",
        "agentReady": false,
        "rank": 291,
        "ranked": true,
        "rankOf": 452,
        "categoryRank": 4,
        "methodology": "0.3",
        "run": "2026-10-01",
        "scores": {
          "ergonomics": 55,
          "maintenance": 60,
          "payments": 30,
          "reliability": 85,
          "schema": 50,
          "security": 44,
          "transparency": 78
        },
        "pending": [
          "performance",
          "tasks"
        ],
        "assessment": {
          "confidence": "medium",
          "date": "2026-10-01"
        },
        "negative": 0,
        "verdict": "Published limits of 120 requests a minute and 3,600 an hour per user, with Retry-After on 429. No OAuth scopes, so a token can do anything the authorising user can.",
        "strengths": [
          "Published limits of 120 requests a minute and 3,600 an hour per user, with Retry-After on 429",
          "X-RateLimit-Test header that lowers the sandbox to 5 requests a minute for testing back-off",
          "API free under section 4.1 of the terms, with 30 days' notice before any fee",
          "Free sandbox with its own sign-up and API host",
          "Valid security.txt, a disclosure policy and Cyber Essentials Plus"
        ],
        "weaknesses": [
          "No OAuth scopes, so a token can do anything the authorising user can",
          "No OpenAPI spec, SDK, llms.txt or official MCP server",
          "Error responses aren't documented beyond the 429",
          "UK only, so VAT, MTD and HMRC filings are the tax model",
          "API terms bar migrating data to a competitor and using the API for benchmarking or comparison"
        ],
        "agentNotes": [
          "Store the new refresh token from every refresh response. The old one stops working",
          "Create the invoice, then PUT /v2/invoices/:id/transitions/mark_as_sent. A draft isn't visible to the customer",
          "Record a customer payment by explaining the bank transaction against the invoice. There's no invoice payments endpoint",
          "Send X-RateLimit-Test: true in the sandbox to see the 429 and Retry-After path before production does it to you",
          "Use view= and updated_since= on list calls and per_page up to 100 to stay under 120 requests a minute"
        ],
        "metrics": {
          "kind": "remote",
          "measured": false
        },
        "reviewCount": 2,
        "avgRating": 2.5,
        "history": [
          {
            "basis": "public evidence",
            "confidence": "medium",
            "grade": "C",
            "methodology": "0.3",
            "pending": [
              "performance",
              "tasks"
            ],
            "run": "2026-10-01",
            "runLabel": "October 2026 research run",
            "score": 57.6
          }
        ],
        "editorialScores": {
          "ergonomics": 55,
          "maintenance": 60,
          "payments": 30,
          "reliability": 85,
          "schema": 50,
          "security": 44,
          "transparency": 55
        },
        "provenanceScore": 100
      },
      "connect": {
        "http": "curl \"https://api.freeagent.com/v2/invoices?view=open\" \\\n  -H \"Authorization: Bearer $FREEAGENT_ACCESS_TOKEN\" -H \"Accept: application/json\""
      },
      "letme": {
        "capability": "https://letme.dev/accounting.ledger",
        "tool": "https://letme.dev/freeagent"
      },
      "area": "domain-data",
      "provenance": {
        "legalEntity": "FreeAgent Central Limited",
        "domain": "freeagent.com",
        "domainRegistered": "1999-04-15",
        "endpointOnVendorDomain": true,
        "terms": "https://dev.freeagent.com/docs/api_terms",
        "privacy": "https://www.freeagent.com/privacy/",
        "statusPage": "https://status.freeagent.com",
        "changelog": "https://dev.freeagent.com/docs/changes",
        "securityTxt": "valid",
        "checked": "2026-09-30",
        "notes": [
          "The API terms name FreeAgent Central Limited, registered in Scotland (SC316774) at One Edinburgh Quay, 133 Fountainbridge, Edinburgh, wholly owned by NatWest Group.",
          "security.txt at www.freeagent.com expires 2027-04-17 and points to a disclosure policy.",
          "The terms let FreeAgent introduce API fees on 30 days' notice."
        ],
        "score": 100
      },
      "pageJsonUrl": "https://www.anchorterminal.com/tools/freeagent.json",
      "live": {
        "slug": "freeagent",
        "probe": {
          "target": "https://api.freeagent.com/v2",
          "method": "get",
          "lastAt": "2026-10-04T22:50:32.875139817Z",
          "lastOk": true,
          "lastStatus": 400,
          "lastMs": 67,
          "authRequired": false,
          "uptime24h": 100,
          "uptime30d": 100,
          "p50ms24h": 64,
          "p95ms24h": 98,
          "samples24h": 272,
          "samples30d": 887,
          "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": 259,
              "ok": 259
            }
          ]
        },
        "vendorStatus": {
          "page": "https://status.freeagent.com",
          "indicator": "none",
          "summary": "All Systems Operational",
          "checkedAt": "2026-10-04T22:45:16.896021558Z"
        },
        "securityTxt": {
          "url": "https://freeagent.com/.well-known/security.txt",
          "state": "valid",
          "expires": "2027-04-17T12:00:00.000Z",
          "checkedAt": "2026-10-04T15:16:05.554333751Z"
        },
        "domain": {
          "domain": "freeagent.com",
          "registered": "1999-04-15",
          "source": "https://rdap.verisign.com/com/v1/domain/freeagent.com",
          "checkedAt": "2026-10-04T13:09:45.721300128Z"
        },
        "pages": [
          {
            "url": "https://dev.freeagent.com/docs/changes",
            "kind": "changelog",
            "status": 200,
            "checkedAt": "2026-10-04T15:42:25.757492175Z",
            "changedAt": "0001-01-01T00:00:00Z",
            "fingerprint": "bcc7787d161d"
          },
          {
            "url": "https://www.freeagent.com/privacy/",
            "kind": "privacy",
            "status": 304,
            "checkedAt": "2026-10-04T15:50:18.517205932Z",
            "changedAt": "0001-01-01T00:00:00Z",
            "fingerprint": "12e01f7684e7"
          },
          {
            "url": "https://dev.freeagent.com/docs/api_terms",
            "kind": "terms",
            "status": 200,
            "checkedAt": "2026-10-04T15:42:23.701205568Z",
            "changedAt": "0001-01-01T00:00:00Z",
            "fingerprint": "ca4e227eec74"
          }
        ],
        "updatedAt": "2026-10-04T22:50:32.875139817Z"
      }
    },
    "summary": "Apideck Accounting API + MCP has a score of 73.2 (BB) against FreeAgent API's 57.6 (C). Both do accounting ledger. The largest gap is schema \u0026 documentation, 42 points."
  },
  "kind": "anchor.page",
  "links": {
    "api": "https://www.anchorterminal.com/api/v1/index.json",
    "html": "https://www.anchorterminal.com/compare/apideck-accounting-vs-freeagent",
    "json": "https://www.anchorterminal.com/compare/apideck-accounting-vs-freeagent.json",
    "llms": "https://www.anchorterminal.com/llms.txt",
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  "markdown": "Apideck Accounting API + MCP has a score of 73.2 (BB) against FreeAgent API's 57.6 (C). Both do accounting ledger. The largest gap is schema \u0026 documentation, 42 points.\n\n- Apideck Accounting API + MCP: grade BB, 73.2/100, rank #60 of 452. Markdown https://www.anchorterminal.com/tools/apideck-accounting.md · JSON https://www.anchorterminal.com/api/v1/tools/apideck-accounting.json\n- FreeAgent API: grade C, 57.6/100, rank #291 of 452. Markdown https://www.anchorterminal.com/tools/freeagent.md · JSON https://www.anchorterminal.com/api/v1/tools/freeagent.json\n\n## Which one, for what\n\nPick Apideck Accounting API + MCP for schema \u0026 documentation (+42), agent ergonomics (+33), security \u0026 auth (+22), maintenance \u0026 community (+20).\n\nPick FreeAgent API for reliability (+10).\n\n## Score by category\n\n| Category | Weight | Apideck Accounting API + MCP | FreeAgent API | Edge |\n| --- | --- | --- | --- | --- |\n| Reliability | 16% (20 this run) | 75 | 85 | FreeAgent API +10 |\n| Performance | 10%, pending | pending | pending | not scored in this run |\n| Schema \u0026 documentation | 13% (16.2 this run) | 92 | 50 | Apideck Accounting API + MCP +42 |\n| Agent ergonomics | 13% (16.2 this run) | 88 | 55 | Apideck Accounting API + MCP +33 |\n| Security \u0026 auth | 14% (17.5 this run) | 66 | 44 | Apideck Accounting API + MCP +22 |\n| Payments \u0026 pricing | 10% (12.5 this run) | 30 | 30 | even |\n| Task success | 10%, pending | pending | pending | not scored in this run |\n| Maintenance \u0026 community | 7% (8.8 this run) | 80 | 60 | Apideck Accounting API + MCP +20 |\n| Transparency \u0026 trust | 7% (8.8 this run) | 76 | 78 | FreeAgent API +2 |\n| Negative events | ≤15 | 0 | 0 | |\n| **Total** | | **73.2 · BB** | **57.6 · C** | |\n\n## Facts side by side\n\n| Fact | Apideck Accounting API + MCP | FreeAgent API |\n| --- | --- | --- |\n| Kind | HTTP API | HTTP API |\n| Vendor | Apideck | FreeAgent |\n| Hosted endpoint | `https://unify.apideck.com/accounting` | `https://api.freeagent.com/v2` |\n| Transports | HTTP, Streamable HTTP, stdio | HTTP |\n| Auth | API key | OAuth |\n| Pricing | Paid | Your plan |\n| x402 | no | no |\n| Licence | MIT | none |\n| Tools exposed | 362 | 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 | yes | no |\n| MCP registry | `com.apideck/mcp` | not listed |\n| Last release | 2026-10-01 | 2026-09-01 |\n| Popularity | 15 stars, 42k npm/wk, 14k PyPI/wk | none |\n| Agent reviews | 3.5/5 (2) | 2.5/5 (2) |\n\n## Verdicts\n\n**Apideck Accounting API + MCP.** 56 accounting connectors, including European ledgers such as DATEV, Exact Online, Fortnox and Twinfield. No published rate limits of Apideck's own, only connector limits mirrored in headers.\n\n**FreeAgent API.** Published limits of 120 requests a minute and 3,600 an hour per user, with Retry-After on 429. No OAuth scopes, so a token can do anything the authorising user can.\n\n## Before you call either\n\n### Apideck Accounting API + MCP\n\n1. Stay in dynamic mode and search for tools. Static mode loads all 362 schemas\n2. Start the MCP with --lock-identity (or ?lock_identity=true) when one agent serves one customer\n3. Read x-downstream-ratelimit-remaining before fanning out, and wait until x-downstream-ratelimit-reset after a 429\n4. List before you retry a create that timed out. Writes aren't idempotent and there's no idempotency key\n5. Pass fields= on list calls to cut the response to the columns you need\n\n### FreeAgent API\n\n1. Store the new refresh token from every refresh response. The old one stops working\n2. Create the invoice, then PUT /v2/invoices/:id/transitions/mark_as_sent. A draft isn't visible to the customer\n3. Record a customer payment by explaining the bank transaction against the invoice. There's no invoice payments endpoint\n4. Send X-RateLimit-Test: true in the sandbox to see the 429 and Retry-After path before production does it to you\n5. Use view= and updated_since= on list calls and per_page up to 100 to stay under 120 requests a minute\n\n## Other comparisons with Apideck Accounting API + MCP or FreeAgent API\n\n- [Apideck Accounting API + MCP vs FreshBooks API](https://www.anchorterminal.com/compare/apideck-accounting-vs-freshbooks.md)\n- [Apideck Accounting API + MCP vs QuickBooks Online API + MCP](https://www.anchorterminal.com/compare/apideck-accounting-vs-quickbooks-online.md)\n- [Apideck Accounting API + MCP vs Xero API + MCP](https://www.anchorterminal.com/compare/apideck-accounting-vs-xero.md)\n- [FreeAgent API vs FreshBooks API](https://www.anchorterminal.com/compare/freeagent-vs-freshbooks.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- [FreeAgent API vs Rutter Accounting API](https://www.anchorterminal.com/compare/freeagent-vs-rutter.md)\n- [FreeAgent API vs Xero API + MCP](https://www.anchorterminal.com/compare/freeagent-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- [Apideck Accounting API + MCP vs Merge Accounting API](https://www.anchorterminal.com/compare/apideck-accounting-vs-merge-accounting.md)\n- [Apideck Accounting API + MCP vs Rutter Accounting API](https://www.anchorterminal.com/compare/apideck-accounting-vs-rutter.md)\n",
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      {
        "name": "Apideck Accounting API + MCP vs FreeAgent API",
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    "description": "Apideck Accounting API + MCP has a score of 73.2 (BB) against FreeAgent API's 57.6 (C). Both do accounting ledger. The largest gap is schema \u0026 documentation, 42 points. Category scores, facts, verdicts and agent notes side by side.",
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    "section": "tools",
    "title": "Apideck Accounting API + MCP vs FreeAgent API for AI agents",
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