{
  "data": {
    "a": {
      "slug": "quaderno",
      "name": "Quaderno",
      "vendor": "Recrea Systems, SL",
      "vendorUrl": "https://quaderno.io",
      "kind": "http-api",
      "category": "tax",
      "summary": "Sales tax, VAT and GST software for online businesses from Recrea Systems, a Visma company in Spain. Its REST API calculates tax for a sale, records sales and refunds, issues invoices and credit notes and exports tax reports.",
      "url": "https://www.anchorterminal.com/tools/quaderno",
      "markdownUrl": "https://www.anchorterminal.com/tools/quaderno.md",
      "slimMarkdownUrl": "https://www.anchorterminal.com/tools/quaderno.min.md",
      "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/quaderno.json",
      "repo": "https://github.com/quaderno/quaderno-ruby",
      "license": "Proprietary service under Quaderno's terms of service. The Ruby library on GitHub is MIT",
      "transports": [
        "http"
      ],
      "remoteUrl": "https://quadernoapp.com/api",
      "packages": [
        {
          "registry": "rubygems",
          "name": "quaderno"
        },
        {
          "registry": "packagist",
          "name": "quaderno/quaderno"
        }
      ],
      "auth": "mixed",
      "authNotes": "Self-serve API key. Sign up at quadernoapp.com (or sandbox-quadernoapp.com for the sandbox), copy the key from the API keys page and send it as the HTTP Basic username with an empty password to https://ACCOUNT_NAME.quadernoapp.com/api. The docs say anyone holding the key can read and modify everything the account has access to. Platforms on Quaderno Connect use OAuth 2.0 authorisation code instead, with an app created in the dashboard, scopes read_only (the default) or read_write, access tokens that expire after 25 days and refresh tokens. No app review or sales approval was found for either route.",
      "pricing": "paid",
      "pricingNotes": "Four monthly plans by recorded transactions. Hobby $29 (25 transactions, 1 user, 1 jurisdiction, 1 integration), Startup $49 (250), Business $99 (1,000) and Growth $149 (2,500), with Enterprise on request above that. Yearly billing costs ten months. API calls are capped at ten times the plan's transactions, and passing the transaction limit moves the account up a plan, with no overage fee. An agent can start without a contract through the 7-day trial, which needs no card, or the free sandbox, which is capped at 200 documents. Registration and filing are sold as an add-on service (https://quaderno.io/pricing/, checked 2026-10-08).",
      "priceSummary": "$29 / mo",
      "where": "hosted",
      "x402": {
        "level": "no",
        "evidence": "No x402, MPP or L402 in the developer docs, the OpenAPI spec or the pricing page (checked 2026-10-08).",
        "endpoints": []
      },
      "toolCount": null,
      "popularity": {
        "githubStars": 15,
        "npmWeekly": null,
        "pypiWeekly": null,
        "asOf": "2026-10-08"
      },
      "docsUrl": "https://developers.quaderno.io",
      "llmsTxt": "https://quaderno.io/llms.txt",
      "openapi": "https://developers.quaderno.io/redocusaurus/openapi-v20241028.yaml",
      "capabilities": [
        "tax.calculate",
        "tax.transactions",
        "tax.invoicing"
      ],
      "tags": [
        "hosted",
        "paid",
        "free-trial",
        "sandbox",
        "api-key",
        "oauth",
        "openapi",
        "llms-txt",
        "webhooks",
        "ruby",
        "php",
        "status-page",
        "sla",
        "vat",
        "sales-tax",
        "e-invoicing"
      ],
      "lastRelease": "2026-07-04",
      "graded": true,
      "anchor": {
        "graded": true,
        "score": 59.5,
        "grade": "C",
        "agentReady": false,
        "rank": 427,
        "ranked": true,
        "rankOf": 722,
        "categoryRank": 4,
        "methodology": "0.4",
        "run": "2026-10-01",
        "scores": {
          "ergonomics": 56,
          "maintenance": 28,
          "payments": 30,
          "reliability": 91,
          "schema": 77,
          "security": 39,
          "transparency": 76
        },
        "pending": [
          "performance",
          "tasks"
        ],
        "assessment": {
          "confidence": "medium",
          "date": "2026-10-08"
        },
        "negative": 0,
        "verdict": "A public OpenAPI 3.1 spec covers 92 operations, with a free sandbox and a status page showing no incident since July 2025. The API key has full account access, there are no idempotency keys, and the newest public API version is dated October 2024.",
        "bestFor": "An agent working for a SaaS, digital-goods or e-commerce seller that needs a tax rate at checkout, a record of each sale with location evidence, and compliant invoices, including Spanish Verifactu and TicketBAI.",
        "strengths": [
          "Public OpenAPI 3.1 spec with 92 operations across tax rates, transactions, invoices, credit notes, reporting and webhooks",
          "Separate free sandbox at sandbox-quadernoapp.com with test tax IDs and a purge endpoint, and a 7-day production trial without a card",
          "Statuspage with API and web application components and no incident recorded since 16 July 2025",
          "Published rate limit of 100 calls per 15 seconds, with X-RateLimit headers and a /ping endpoint that reports remaining calls",
          "Subprocessors and hosting locations listed on the Visma Trust Centre (DigitalOcean in the Netherlands, AWS in Ireland)"
        ],
        "weaknesses": [
          "One API key reads and writes everything its user can reach. Scopes exist only on Connect OAuth tokens (read_only, read_write)",
          "No idempotency keys, and the docs say retry logic is the integration's responsibility",
          "The newest public API version is 20241028. A preview of 20260309 is in the docs but not yet available",
          "No security.txt, the bug bounty is marked temporarily closed, and no SOC 2 or ISO 27001 report was found for Quaderno itself",
          "Registration and filing are a done-for-you service booked by call, not API operations. Monthly API calls are capped at ten times the plan's transactions"
        ],
        "agentNotes": [
          "Call GET https://quadernoapp.com/api/authorization first. Its `href` gives the account subdomain that every other call needs",
          "Before retrying a failed POST /transactions, list invoices by `processor_id` to check whether the sale was recorded. There is no idempotency key",
          "Treat GET /invoices/{id}/deliver as a write. It emails the invoice to the customer",
          "Correct a final invoice with a credit note. DELETE on invoices returns 410 and PUT accepts only notes, tags, metadata and address fields",
          "Read X-RateLimit-Remaining and X-RateLimit-Reset, and page with `created_before` and `limit` up to 100"
        ],
        "metrics": {
          "kind": "remote",
          "measured": false
        },
        "reviewCount": 0,
        "avgRating": 0,
        "history": [
          {
            "basis": "public evidence",
            "confidence": "medium",
            "grade": "C",
            "methodology": "0.4",
            "pending": [
              "performance",
              "tasks"
            ],
            "run": "2026-10-01",
            "runLabel": "October 2026 research run",
            "score": 59.5
          }
        ],
        "editorialScores": {
          "ergonomics": 56,
          "maintenance": 28,
          "payments": 30,
          "reliability": 91,
          "schema": 77,
          "security": 39,
          "transparency": 69
        },
        "provenanceScore": 83
      },
      "connect": {
        "install": "gem install quaderno",
        "http": "curl \"https://ACCOUNT_NAME.quadernoapp.com/api/tax_rates/calculate?to_country=US\u0026to_postal_code=10128\" \\\n  -u YOUR_API_KEY:x"
      },
      "letme": {
        "capability": "https://letme.dev/tax.calculate",
        "tool": "https://letme.dev/quaderno"
      },
      "area": "domain-data",
      "unitPrices": [
        {
          "item": "Hobby plan, 25 transactions",
          "unit": "month",
          "usd": 29,
          "note": "1 user, 1 jurisdiction, 1 integration. $24 a month billed yearly"
        },
        {
          "item": "Startup plan, 250 transactions",
          "unit": "month",
          "usd": 49,
          "note": "$41 a month billed yearly"
        },
        {
          "item": "Business plan, 1,000 transactions",
          "unit": "month",
          "usd": 99,
          "note": "$83 a month billed yearly"
        },
        {
          "item": "Growth plan, 2,500 transactions",
          "unit": "month",
          "usd": 149,
          "note": "$124 a month billed yearly"
        }
      ],
      "provenance": {
        "legalEntity": "Recrea Systems, SL",
        "domain": "quaderno.io",
        "domainRegistered": "2012-10-22",
        "endpointOnVendorDomain": true,
        "terms": "https://quaderno.io/legal/terms/",
        "privacy": "https://quaderno.io/legal/privacy/",
        "statusPage": "https://quaderno.statuspage.io",
        "changelog": "https://developers.quaderno.io/api-changelog/",
        "securityTxt": "none",
        "checked": "2026-10-08",
        "notes": [
          "The terms (updated 15 September 2026, effective 1 October 2026) name Recrea Systems, SL, company registration number B35635648, Venegas 2A, Local 1, 35003 Las Palmas, Spain, under Spanish law. The DPA calls it a company in the Visma Group.",
          "The API and dashboard answer at quadernoapp.com and its account subdomains, a second domain the vendor's docs and terms point to. RDAP gives its registration date as 2012-04-27.",
          "RDAP for quaderno.io gives a registration date of 2012-10-22 and an expiry of 2026-10-22.",
          "quaderno.io/.well-known/security.txt and quadernoapp.com/.well-known/security.txt both return 404. The security policy says the bug bounty programme is temporarily closed.",
          "Subprocessors are listed on the Visma Trust Centre at https://www.visma.com/trust-centre-products/quaderno, which shows the legal unit as Recrea Systems SL, ES."
        ],
        "score": 83
      },
      "pageJsonUrl": "https://www.anchorterminal.com/tools/quaderno.json",
      "live": {
        "slug": "quaderno",
        "probe": {
          "target": "https://quadernoapp.com/api",
          "method": "get",
          "lastAt": "2026-10-08T21:12:19.426931695Z",
          "lastOk": true,
          "lastStatus": 404,
          "lastMs": 89,
          "authRequired": false,
          "uptime24h": 100,
          "uptime30d": 100,
          "p50ms24h": 107,
          "p95ms24h": 155,
          "samples24h": 64,
          "samples30d": 64,
          "days": [
            {
              "date": "2026-10-08",
              "probes": 64,
              "ok": 64
            }
          ]
        },
        "vendorStatus": {
          "page": "https://quaderno.statuspage.io",
          "indicator": "none",
          "summary": "All Systems Operational",
          "checkedAt": "2026-10-08T21:06:23.200872791Z"
        },
        "githubStars": 15,
        "securityTxt": {
          "url": "https://quaderno.io/.well-known/security.txt",
          "state": "none",
          "checkedAt": "2026-10-08T15:38:48.301371426Z"
        },
        "pages": [
          {
            "url": "https://developers.quaderno.io/api-changelog/",
            "kind": "changelog",
            "status": 200,
            "checkedAt": "2026-10-08T18:17:58.645813139Z",
            "changedAt": "0001-01-01T00:00:00Z",
            "fingerprint": "69ea7b5187a7"
          },
          {
            "url": "https://quaderno.io/pricing/",
            "kind": "pricing",
            "status": 200,
            "checkedAt": "2026-10-08T18:23:37.065141515Z",
            "changedAt": "0001-01-01T00:00:00Z",
            "fingerprint": "0674c9e74b70"
          },
          {
            "url": "https://quaderno.io/legal/privacy/",
            "kind": "privacy",
            "status": 200,
            "checkedAt": "2026-10-08T18:23:32.930235875Z",
            "changedAt": "0001-01-01T00:00:00Z",
            "fingerprint": "02d941cfbb26"
          },
          {
            "url": "https://quaderno.io/legal/terms/",
            "kind": "terms",
            "status": 200,
            "checkedAt": "2026-10-08T18:23:35.074640255Z",
            "changedAt": "0001-01-01T00:00:00Z",
            "fingerprint": "9b2392893a86"
          }
        ],
        "updatedAt": "2026-10-08T21:12:19.426931695Z"
      }
    },
    "answer": "Quaderno scores 59.5 (C) on agent readiness against TaxCloud's 57.4 (C), and leads in 3 of 7 scored categories. TaxCloud leads on agent ergonomics, security \u0026 auth and maintenance \u0026 community.",
    "b": {
      "slug": "taxcloud",
      "name": "TaxCloud",
      "vendor": "The Federal Tax Authority, LLC (TaxCloud)",
      "vendorUrl": "https://taxcloud.com",
      "kind": "http-api",
      "category": "tax",
      "summary": "TaxCloud is a US sales tax service from The Federal Tax Authority, LLC. Its v3 REST API calculates tax on carts, records orders and refunds for filing, stores exemption certificates, verifies addresses and searches product tax codes.",
      "url": "https://www.anchorterminal.com/tools/taxcloud",
      "markdownUrl": "https://www.anchorterminal.com/tools/taxcloud.md",
      "slimMarkdownUrl": "https://www.anchorterminal.com/tools/taxcloud.min.md",
      "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/taxcloud.json",
      "repo": "https://github.com/FedTax/taxcloud-agent-skills",
      "license": "Proprietary service under TaxCloud's terms of service. The agent skills repository on GitHub is Apache-2.0",
      "transports": [
        "http"
      ],
      "remoteUrl": "https://api.v3.taxcloud.com",
      "packages": [],
      "auth": "api-key",
      "authNotes": "A self-serve API key, generated by a signed-in user at Developer \u003e API in the web app and sent as `X-API-KEY`. Each request also carries a connection ID in the path, created at Integrations \u003e Custom API. The v3 APIs accept a JWT as `Authorization: Bearer` too, and the docs direct integrations to the key. Keys can be listed, created and deleted through the Management API, where creating one needs a signed-in user token. No OAuth, app review or partner approval applies.",
      "pricing": "paid",
      "pricingNotes": "The API needs the Premium plan, from $79 a month for 200 orders, with eight public tiers up to $1,299 for 40,000. Each calculation or address verification counts as a tenth of an order. A 30-day trial with Premium access needs no card, so an agent's owner can start without a contract. There is no sandbox (checked 2026-10-08).",
      "priceSummary": "$79 / mo",
      "where": "hosted",
      "x402": {
        "level": "no",
        "evidence": "No x402, MPP or L402 in the API reference, the guides or the pricing page (checked 2026-10-08).",
        "endpoints": []
      },
      "toolCount": null,
      "popularity": {
        "githubStars": 0,
        "npmWeekly": null,
        "pypiWeekly": null,
        "asOf": "2026-10-08"
      },
      "docsUrl": "https://docs.taxcloud.com/",
      "llmsTxt": "https://docs.taxcloud.com/llms.txt",
      "openapi": "https://docs.taxcloud.com/openapi/api-reference.json",
      "capabilities": [
        "tax.calculate",
        "tax.transactions",
        "tax.exemptions",
        "shipping.address-validation"
      ],
      "tags": [
        "hosted",
        "closed-source",
        "api-key",
        "openapi",
        "llms-txt",
        "no-card",
        "us-only",
        "status-page",
        "agent-skills"
      ],
      "lastRelease": "2026-09-24",
      "graded": true,
      "anchor": {
        "graded": true,
        "score": 57.4,
        "grade": "C",
        "agentReady": false,
        "rank": 475,
        "ranked": true,
        "rankOf": 722,
        "categoryRank": 6,
        "methodology": "0.4",
        "run": "2026-10-01",
        "scores": {
          "ergonomics": 64,
          "maintenance": 57,
          "payments": 34,
          "reliability": 66,
          "schema": 75,
          "security": 45,
          "transparency": 51
        },
        "pending": [
          "performance",
          "tasks"
        ],
        "assessment": {
          "confidence": "medium",
          "date": "2026-10-08"
        },
        "negative": 0,
        "verdict": "A 30-operation REST API with a public OpenAPI 3.1 contract, llms.txt, Markdown docs and a 30-day trial that needs no card. The vendor publishes no rate limit numbers, no SLA, no API changelog and no official v3 client library, and the security page names no audit or certification.",
        "bestFor": "An agent working for a US seller that needs tax on a cart at checkout, a record of orders and refunds for filing, and exemption certificates by customer.",
        "strengths": [
          "OpenAPI 3.1 documents for the Sales Tax API (16 operations) and Management API (14), plus llms.txt and a Markdown copy of every docs page",
          "30-day trial with Premium plan access, the API included, and no card or payment method needed",
          "Refunds take an `idempotencyKey`, carts upsert by `cartId`, and a repeated void returns 204",
          "Errors are `application/problem+json` with `title`, `status`, `detail` and an `errors` list, which we confirmed on a 401",
          "Access keys can be listed, created and deleted through the Management API, and the bulk product delete needs a `confirm_delete` parameter"
        ],
        "weaknesses": [
          "No rate limit numbers are published. The API page says only that the threshold is high and subject to change",
          "The security page says TaxCloud does not offer an SLA, and the terms supply the service as is",
          "No API changelog or deprecation policy was found, and the legacy v1 API has no published end date",
          "No official client library for v3 was found. The vendor's PHP library targets v1 and was last changed in June 2024",
          "Each calculation or address check counts as a tenth of an order against the plan, test connections included"
        ],
        "agentNotes": [
          "Send `X-API-KEY` on every call and put the connection ID in the path, as in `/tax/connections/{connectionId}/carts`. A wrong ID returns 404",
          "Mark nexus states active in the account first. With none active the API returns zero tax and no error",
          "Use a separate test connection. There is no sandbox, and orders on a live connection go into filing",
          "Pass a stable `idempotencyKey` on refunds, and never convert the same cart twice. A second conversion creates a duplicate liability",
          "Void a wrong order before 12:00 AM Eastern on the 10th of the month after its `completedDate`. Later requests return 422"
        ],
        "metrics": {
          "kind": "remote",
          "measured": false
        },
        "reviewCount": 0,
        "avgRating": 0,
        "history": [
          {
            "basis": "public evidence",
            "confidence": "medium",
            "grade": "C",
            "methodology": "0.4",
            "pending": [
              "performance",
              "tasks"
            ],
            "run": "2026-10-01",
            "runLabel": "October 2026 research run",
            "score": 57.4
          }
        ],
        "editorialScores": {
          "ergonomics": 64,
          "maintenance": 57,
          "payments": 34,
          "reliability": 66,
          "schema": 75,
          "security": 45,
          "transparency": 33
        },
        "provenanceScore": 69
      },
      "connect": {
        "install": "npx skills add FedTax/taxcloud-agent-skills",
        "http": "curl https://api.v3.taxcloud.com/tax/connections/\u003cconnectionId\u003e/ping \\\n  -H \"X-API-KEY: \u003capiKey\u003e\" \\\n  -H \"Accept: application/json\"",
        "claudeCode": "claude mcp add --transport http taxcloud-docs https://docs.taxcloud.com/_mcp/server"
      },
      "letme": {
        "capability": "https://letme.dev/tax.calculate",
        "tool": "https://letme.dev/taxcloud"
      },
      "area": "domain-data",
      "unitPrices": [
        {
          "item": "Premium, 200 orders a month",
          "unit": "month",
          "usd": 79,
          "note": "the plan with API access; a calculation or address verification counts as a tenth of an order"
        },
        {
          "item": "Premium, 400 orders a month",
          "unit": "month",
          "usd": 149,
          "note": "monthly billing"
        },
        {
          "item": "Premium, 1,000 orders a month",
          "unit": "month",
          "usd": 299,
          "note": "monthly billing"
        },
        {
          "item": "Premium, 10,000 orders a month",
          "unit": "month",
          "usd": 749,
          "note": "monthly billing"
        },
        {
          "item": "Starter, 100 orders a month",
          "unit": "month",
          "usd": 19,
          "note": "no API access"
        },
        {
          "item": "Filing subscription, one return a month",
          "unit": "month",
          "usd": 39,
          "note": "separate from the order plan; surcharges for Colorado and Louisiana"
        }
      ],
      "provenance": {
        "legalEntity": "The Federal Tax Authority, LLC (d/b/a TaxCloud)",
        "domain": "taxcloud.com",
        "domainRegistered": "2003-10-06",
        "endpointOnVendorDomain": true,
        "terms": "https://taxcloud.com/legal/tos/",
        "privacy": "https://taxcloud.com/legal/privacy-policy/",
        "statusPage": "https://status.taxcloud.com",
        "changelog": "",
        "securityTxt": "none",
        "checked": "2026-10-08",
        "notes": [
          "The terms of service (last updated March 2025) are with The Federal Tax Authority, LLC, a Washington limited liability company, and govern access to and use of the services. No separate API terms were found.",
          "The privacy policy (last updated 1 February 2025) covers the website including the TaxCloud platform. No data processing agreement or sub-processor list was found on the legal page.",
          "The API host is api.v3.taxcloud.com and the legacy host is api.taxcloud.net. RDAP gives a registration date of 2003-10-06 for taxcloud.com, with Network Solutions, LLC as registrar.",
          "status.taxcloud.com redirects to https://taxcloud.statuspage.datadoghq.com, a Datadog status page created on 28 January 2026.",
          "taxcloud.com/.well-known/security.txt returns 404.",
          "No changelog was found. docs.taxcloud.com/changelog returns 404."
        ],
        "score": 69
      },
      "pageJsonUrl": "https://www.anchorterminal.com/tools/taxcloud.json",
      "live": {
        "slug": "taxcloud",
        "probe": {
          "target": "https://api.v3.taxcloud.com",
          "method": "get",
          "lastAt": "2026-10-08T21:12:23.03593912Z",
          "lastOk": true,
          "lastStatus": 404,
          "lastMs": 337,
          "authRequired": false,
          "uptime24h": 100,
          "uptime30d": 100,
          "p50ms24h": 339,
          "p95ms24h": 377,
          "samples24h": 21,
          "samples30d": 21,
          "days": [
            {
              "date": "2026-10-08",
              "probes": 21,
              "ok": 21
            }
          ]
        },
        "vendorStatus": {
          "page": "https://status.taxcloud.com",
          "indicator": "unknown",
          "summary": "no machine-readable status found",
          "checkedAt": "2026-10-08T19:39:15.801163493Z"
        },
        "updatedAt": "2026-10-08T21:12:23.03593912Z"
      }
    },
    "facts": [
      {
        "a": "HTTP API",
        "b": "HTTP API",
        "name": "Kind"
      },
      {
        "a": "Recrea Systems, SL",
        "b": "The Federal Tax Authority, LLC (TaxCloud)",
        "name": "Vendor"
      },
      {
        "a": "https://quadernoapp.com/api",
        "b": "https://api.v3.taxcloud.com",
        "name": "Hosted endpoint"
      },
      {
        "a": "HTTP",
        "b": "HTTP",
        "name": "Transports"
      },
      {
        "a": "OAuth or key",
        "b": "API key",
        "name": "Auth"
      },
      {
        "a": "Paid",
        "b": "Paid",
        "name": "Pricing"
      },
      {
        "a": "no",
        "b": "no",
        "name": "x402"
      },
      {
        "a": "Proprietary service under Quaderno's terms of service. The Ruby library on GitHub is MIT",
        "b": "Proprietary service under TaxCloud's terms of service. The agent skills repository on GitHub is Apache-2.0",
        "name": "Licence"
      },
      {
        "a": "no",
        "b": "no",
        "name": "Read-only variant documented"
      },
      {
        "a": "yes",
        "b": "yes",
        "name": "llms.txt"
      },
      {
        "a": "2026-07-04",
        "b": "2026-09-24",
        "name": "Last release"
      },
      {
        "a": "2026-09-15",
        "b": "2025-03-01",
        "name": "Terms last updated"
      },
      {
        "a": "2024-05-16",
        "b": "2025-02-01",
        "name": "Privacy policy last updated"
      },
      {
        "a": "not found in the text",
        "b": "yes",
        "name": "Customer content may train models"
      },
      {
        "a": "yes",
        "b": "yes",
        "name": "Terms restrict automated access"
      },
      {
        "a": "yes",
        "b": "yes",
        "name": "Terms restrict benchmarking"
      },
      {
        "a": "yes",
        "b": "yes",
        "name": "Terms or service can change without notice"
      },
      {
        "a": "not found in the text",
        "b": "not found in the text",
        "name": "Arbitration or class-action waiver"
      },
      {
        "a": "15 stars",
        "b": "0 stars",
        "name": "Popularity"
      }
    ],
    "faq": [
      {
        "answer": "Quaderno scores 59.5 (C) on agent readiness against TaxCloud's 57.4 (C), and leads in 3 of 7 scored categories. TaxCloud leads on agent ergonomics, security \u0026 auth and maintenance \u0026 community.",
        "question": "Which is better for AI agents, Quaderno or TaxCloud?"
      },
      {
        "answer": "Quaderno takes an API key or an OAuth sign-in. TaxCloud needs an API key.",
        "question": "Do Quaderno and TaxCloud need an API key?"
      },
      {
        "answer": "Yes. Quaderno has a hosted endpoint at https://quadernoapp.com/api and TaxCloud at https://api.v3.taxcloud.com.",
        "question": "Can an agent call Quaderno and TaxCloud without installing anything?"
      }
    ],
    "goodFor": [
      {
        "aheadOn": [
          "Reliability, 91 against 66",
          "Transparency \u0026 trust, 76 against 51"
        ],
        "also": null,
        "goodFor": "An agent working for a SaaS, digital-goods or e-commerce seller that needs a tax rate at checkout, a record of each sale with location evidence, and compliant invoices, including Spanish Verifactu and TicketBAI.",
        "slug": "quaderno",
        "watchFor": "One API key reads and writes everything its user can reach. Scopes exist only on Connect OAuth tokens (read_only, read_write)"
      },
      {
        "aheadOn": [
          "Agent ergonomics, 64 against 56",
          "Security \u0026 auth, 45 against 39",
          "Maintenance \u0026 community, 57 against 28"
        ],
        "also": [
          "Free to start without a card"
        ],
        "goodFor": "An agent working for a US seller that needs tax on a cart at checkout, a record of orders and refunds for filing, and exemption certificates by customer.",
        "slug": "taxcloud",
        "watchFor": "No rate limit numbers are published. The API page says only that the threshold is high and subject to change"
      }
    ],
    "job": {
      "capability": "tax.calculate",
      "name": "Tax calculate"
    },
    "others": [
      {
        "json": "https://www.anchorterminal.com/compare/anrok-vs-quaderno.json",
        "title": "Anrok vs Quaderno",
        "url": "https://www.anchorterminal.com/compare/anrok-vs-quaderno"
      },
      {
        "json": "https://www.anchorterminal.com/compare/anrok-vs-taxcloud.json",
        "title": "Anrok vs TaxCloud",
        "url": "https://www.anchorterminal.com/compare/anrok-vs-taxcloud"
      },
      {
        "json": "https://www.anchorterminal.com/compare/avalara-vs-quaderno.json",
        "title": "Avalara AvaTax vs Quaderno",
        "url": "https://www.anchorterminal.com/compare/avalara-vs-quaderno"
      },
      {
        "json": "https://www.anchorterminal.com/compare/avalara-vs-taxcloud.json",
        "title": "Avalara AvaTax vs TaxCloud",
        "url": "https://www.anchorterminal.com/compare/avalara-vs-taxcloud"
      },
      {
        "json": "https://www.anchorterminal.com/compare/fonoa-vs-quaderno.json",
        "title": "Fonoa vs Quaderno",
        "url": "https://www.anchorterminal.com/compare/fonoa-vs-quaderno"
      },
      {
        "json": "https://www.anchorterminal.com/compare/fonoa-vs-taxcloud.json",
        "title": "Fonoa vs TaxCloud",
        "url": "https://www.anchorterminal.com/compare/fonoa-vs-taxcloud"
      },
      {
        "json": "https://www.anchorterminal.com/compare/kintsugi-vs-quaderno.json",
        "title": "Kintsugi vs Quaderno",
        "url": "https://www.anchorterminal.com/compare/kintsugi-vs-quaderno"
      },
      {
        "json": "https://www.anchorterminal.com/compare/kintsugi-vs-taxcloud.json",
        "title": "Kintsugi vs TaxCloud",
        "url": "https://www.anchorterminal.com/compare/kintsugi-vs-taxcloud"
      },
      {
        "json": "https://www.anchorterminal.com/compare/numeral-vs-quaderno.json",
        "title": "Numeral vs Quaderno",
        "url": "https://www.anchorterminal.com/compare/numeral-vs-quaderno"
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      {
        "json": "https://www.anchorterminal.com/compare/numeral-vs-taxcloud.json",
        "title": "Numeral vs TaxCloud",
        "url": "https://www.anchorterminal.com/compare/numeral-vs-taxcloud"
      },
      {
        "json": "https://www.anchorterminal.com/compare/quaderno-vs-taxjar.json",
        "title": "Quaderno vs TaxJar",
        "url": "https://www.anchorterminal.com/compare/quaderno-vs-taxjar"
      },
      {
        "json": "https://www.anchorterminal.com/compare/quaderno-vs-vertex-tax.json",
        "title": "Quaderno vs Vertex O Series",
        "url": "https://www.anchorterminal.com/compare/quaderno-vs-vertex-tax"
      },
      {
        "json": "https://www.anchorterminal.com/compare/quaderno-vs-zamp.json",
        "title": "Quaderno vs Zamp",
        "url": "https://www.anchorterminal.com/compare/quaderno-vs-zamp"
      },
      {
        "json": "https://www.anchorterminal.com/compare/taxcloud-vs-taxjar.json",
        "title": "TaxCloud vs TaxJar",
        "url": "https://www.anchorterminal.com/compare/taxcloud-vs-taxjar"
      },
      {
        "json": "https://www.anchorterminal.com/compare/taxcloud-vs-vertex-tax.json",
        "title": "TaxCloud vs Vertex O Series",
        "url": "https://www.anchorterminal.com/compare/taxcloud-vs-vertex-tax"
      },
      {
        "json": "https://www.anchorterminal.com/compare/taxcloud-vs-zamp.json",
        "title": "TaxCloud vs Zamp",
        "url": "https://www.anchorterminal.com/compare/taxcloud-vs-zamp"
      }
    ],
    "scores": [
      {
        "by": 25,
        "edge": "quaderno",
        "key": "reliability",
        "name": "Reliability",
        "quaderno": 91,
        "taxcloud": 66,
        "weight": 16
      },
      {
        "key": "performance",
        "name": "Performance",
        "pending": true,
        "weight": 10
      },
      {
        "by": 2,
        "edge": "quaderno",
        "key": "schema",
        "name": "Schema \u0026 documentation",
        "quaderno": 77,
        "taxcloud": 75,
        "weight": 13
      },
      {
        "by": 8,
        "edge": "taxcloud",
        "key": "ergonomics",
        "name": "Agent ergonomics",
        "quaderno": 56,
        "taxcloud": 64,
        "weight": 13
      },
      {
        "by": 6,
        "edge": "taxcloud",
        "key": "security",
        "name": "Security \u0026 auth",
        "quaderno": 39,
        "taxcloud": 45,
        "weight": 14
      },
      {
        "by": 4,
        "edge": "taxcloud",
        "key": "payments",
        "name": "Payments \u0026 pricing",
        "quaderno": 30,
        "taxcloud": 34,
        "weight": 10
      },
      {
        "key": "tasks",
        "name": "Task success",
        "pending": true,
        "weight": 10
      },
      {
        "by": 29,
        "edge": "taxcloud",
        "key": "maintenance",
        "name": "Maintenance \u0026 community",
        "quaderno": 28,
        "taxcloud": 57,
        "weight": 7
      },
      {
        "by": 25,
        "edge": "quaderno",
        "key": "transparency",
        "name": "Transparency \u0026 trust",
        "quaderno": 76,
        "taxcloud": 51,
        "weight": 7
      }
    ],
    "summary": "Quaderno scores 59.5 (C) on agent readiness against TaxCloud's 57.4 (C), and leads in 3 of 7 scored categories. TaxCloud leads on agent ergonomics, security \u0026 auth and maintenance \u0026 community. Both do tax calculate.",
    "verdicts": {
      "quaderno": "A public OpenAPI 3.1 spec covers 92 operations, with a free sandbox and a status page showing no incident since July 2025. The API key has full account access, there are no idempotency keys, and the newest public API version is dated October 2024.",
      "taxcloud": "A 30-operation REST API with a public OpenAPI 3.1 contract, llms.txt, Markdown docs and a 30-day trial that needs no card. The vendor publishes no rate limit numbers, no SLA, no API changelog and no official v3 client library, and the security page names no audit or certification."
    }
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  "links": {
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    "html": "https://www.anchorterminal.com/compare/quaderno-vs-taxcloud",
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    "llms": "https://www.anchorterminal.com/llms.txt",
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  "markdown": "Quaderno scores 59.5 (C) on agent readiness against TaxCloud's 57.4 (C), and leads in 3 of 7 scored categories. TaxCloud leads on agent ergonomics, security \u0026 auth and maintenance \u0026 community. Both do tax calculate.\n\n- Quaderno: grade C, 59.5/100, rank #427 of 722. Markdown https://www.anchorterminal.com/tools/quaderno.md · JSON https://www.anchorterminal.com/api/v1/tools/quaderno.json\n- TaxCloud: grade C, 57.4/100, rank #475 of 722. Markdown https://www.anchorterminal.com/tools/taxcloud.md · JSON https://www.anchorterminal.com/api/v1/tools/taxcloud.json\n\n## Which one, for what\n\n### Quaderno (C)\n\nGood for: An agent working for a SaaS, digital-goods or e-commerce seller that needs a tax rate at checkout, a record of each sale with location evidence, and compliant invoices, including Spanish Verifactu and TicketBAI.\n\nAhead on:\n- Reliability, 91 against 66\n- Transparency \u0026 trust, 76 against 51\n\nWatch for: One API key reads and writes everything its user can reach. Scopes exist only on Connect OAuth tokens (read_only, read_write)\n\n### TaxCloud (C)\n\nGood for: An agent working for a US seller that needs tax on a cart at checkout, a record of orders and refunds for filing, and exemption certificates by customer.\n\nAhead on:\n- Agent ergonomics, 64 against 56\n- Security \u0026 auth, 45 against 39\n- Maintenance \u0026 community, 57 against 28\n\nAlso in its favour:\n- Free to start without a card\n\nWatch for: No rate limit numbers are published. The API page says only that the threshold is high and subject to change\n\n\n## Score by category\n\n| Category | Weight | Quaderno | TaxCloud | Edge |\n| --- | --- | --- | --- | --- |\n| Reliability | 16% (20 this run) | 91 | 66 | Quaderno +25 |\n| Performance | 10%, pending | pending | pending | not scored in this run |\n| Schema \u0026 documentation | 13% (16.2 this run) | 77 | 75 | Quaderno +2 |\n| Agent ergonomics | 13% (16.2 this run) | 56 | 64 | TaxCloud +8 |\n| Security \u0026 auth | 14% (17.5 this run) | 39 | 45 | TaxCloud +6 |\n| Payments \u0026 pricing | 10% (12.5 this run) | 30 | 34 | TaxCloud +4 |\n| Task success | 10%, pending | pending | pending | not scored in this run |\n| Maintenance \u0026 community | 7% (8.8 this run) | 28 | 57 | TaxCloud +29 |\n| Transparency \u0026 trust | 7% (8.8 this run) | 76 | 51 | Quaderno +25 |\n| Negative events | ≤15 | 0 | 0 | |\n| **Total** | | **59.5 · C** | **57.4 · C** | |\n\n## Facts side by side\n\n| Fact | Quaderno | TaxCloud |\n| --- | --- | --- |\n| Kind | HTTP API | HTTP API |\n| Vendor | Recrea Systems, SL | The Federal Tax Authority, LLC (TaxCloud) |\n| Hosted endpoint | `https://quadernoapp.com/api` | `https://api.v3.taxcloud.com` |\n| Transports | HTTP | HTTP |\n| Auth | OAuth or key | API key |\n| Pricing | Paid | Paid |\n| x402 | no | no |\n| Licence | Proprietary service under Quaderno's terms of service. The Ruby library on GitHub is MIT | Proprietary service under TaxCloud's terms of service. The agent skills repository on GitHub is Apache-2.0 |\n| Read-only variant documented | no | no |\n| llms.txt | yes | yes |\n| Last release | 2026-07-04 | 2026-09-24 |\n| Terms last updated | 2026-09-15 | 2025-03-01 |\n| Privacy policy last updated | 2024-05-16 | 2025-02-01 |\n| Customer content may train models | not found in the text | yes |\n| Terms restrict automated access | yes | yes |\n| Terms restrict benchmarking | yes | yes |\n| Terms or service can change without notice | yes | yes |\n| Arbitration or class-action waiver | not found in the text | not found in the text |\n| Popularity | 15 stars | 0 stars |\n\n## Verdicts\n\n**Quaderno.** A public OpenAPI 3.1 spec covers 92 operations, with a free sandbox and a status page showing no incident since July 2025. The API key has full account access, there are no idempotency keys, and the newest public API version is dated October 2024.\n\n**TaxCloud.** A 30-operation REST API with a public OpenAPI 3.1 contract, llms.txt, Markdown docs and a 30-day trial that needs no card. The vendor publishes no rate limit numbers, no SLA, no API changelog and no official v3 client library, and the security page names no audit or certification.\n\n## Before you call either\n\n### Quaderno\n\n1. Call GET https://quadernoapp.com/api/authorization first. Its `href` gives the account subdomain that every other call needs\n2. Before retrying a failed POST /transactions, list invoices by `processor_id` to check whether the sale was recorded. There is no idempotency key\n3. Treat GET /invoices/{id}/deliver as a write. It emails the invoice to the customer\n4. Correct a final invoice with a credit note. DELETE on invoices returns 410 and PUT accepts only notes, tags, metadata and address fields\n5. Read X-RateLimit-Remaining and X-RateLimit-Reset, and page with `created_before` and `limit` up to 100\n\n### TaxCloud\n\n1. Send `X-API-KEY` on every call and put the connection ID in the path, as in `/tax/connections/{connectionId}/carts`. A wrong ID returns 404\n2. Mark nexus states active in the account first. With none active the API returns zero tax and no error\n3. Use a separate test connection. There is no sandbox, and orders on a live connection go into filing\n4. Pass a stable `idempotencyKey` on refunds, and never convert the same cart twice. A second conversion creates a duplicate liability\n5. Void a wrong order before 12:00 AM Eastern on the 10th of the month after its `completedDate`. Later requests return 422\n\n## Questions\n\n### Which is better for AI agents, Quaderno or TaxCloud?\n\nQuaderno scores 59.5 (C) on agent readiness against TaxCloud's 57.4 (C), and leads in 3 of 7 scored categories. TaxCloud leads on agent ergonomics, security \u0026 auth and maintenance \u0026 community.\n\n### Do Quaderno and TaxCloud need an API key?\n\nQuaderno takes an API key or an OAuth sign-in. TaxCloud needs an API key.\n\n### Can an agent call Quaderno and TaxCloud without installing anything?\n\nYes. Quaderno has a hosted endpoint at https://quadernoapp.com/api and TaxCloud at https://api.v3.taxcloud.com.\n\n\n## For agents\n\n- This comparison as JSON: https://www.anchorterminal.com/compare/quaderno-vs-taxcloud.json, and with the fewest tokens: https://www.anchorterminal.com/compare/quaderno-vs-taxcloud.min.md\n- Over MCP at https://www.anchorterminal.com/mcp (no key): `compare_tools {\"a\": \"quaderno\", \"b\": \"taxcloud\"}`. From a terminal: `anchor compare quaderno taxcloud`\n- Each listing in full: https://www.anchorterminal.com/api/v1/tools/quaderno.json and https://www.anchorterminal.com/api/v1/tools/taxcloud.json\n\n## Other comparisons with Quaderno or TaxCloud\n\n- [Anrok vs Quaderno](https://www.anchorterminal.com/compare/anrok-vs-quaderno.md)\n- [Anrok vs TaxCloud](https://www.anchorterminal.com/compare/anrok-vs-taxcloud.md)\n- [Avalara AvaTax vs Quaderno](https://www.anchorterminal.com/compare/avalara-vs-quaderno.md)\n- [Avalara AvaTax vs TaxCloud](https://www.anchorterminal.com/compare/avalara-vs-taxcloud.md)\n- [Fonoa vs Quaderno](https://www.anchorterminal.com/compare/fonoa-vs-quaderno.md)\n- [Fonoa vs TaxCloud](https://www.anchorterminal.com/compare/fonoa-vs-taxcloud.md)\n- [Kintsugi vs Quaderno](https://www.anchorterminal.com/compare/kintsugi-vs-quaderno.md)\n- [Kintsugi vs TaxCloud](https://www.anchorterminal.com/compare/kintsugi-vs-taxcloud.md)\n- [Numeral vs Quaderno](https://www.anchorterminal.com/compare/numeral-vs-quaderno.md)\n- [Numeral vs TaxCloud](https://www.anchorterminal.com/compare/numeral-vs-taxcloud.md)\n- [Quaderno vs TaxJar](https://www.anchorterminal.com/compare/quaderno-vs-taxjar.md)\n- [Quaderno vs Vertex O Series](https://www.anchorterminal.com/compare/quaderno-vs-vertex-tax.md)\n- [Quaderno vs Zamp](https://www.anchorterminal.com/compare/quaderno-vs-zamp.md)\n- [TaxCloud vs TaxJar](https://www.anchorterminal.com/compare/taxcloud-vs-taxjar.md)\n- [TaxCloud vs Vertex O Series](https://www.anchorterminal.com/compare/taxcloud-vs-vertex-tax.md)\n- [TaxCloud vs Zamp](https://www.anchorterminal.com/compare/taxcloud-vs-zamp.md)\n",
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    "description": "Quaderno scores 59.5 (C) on agent readiness against TaxCloud's 57.4 (C), and leads in 3 of 7 scored categories. TaxCloud leads on agent ergonomics, security \u0026 auth and maintenance \u0026 community. Both do tax calculate. Category scores, facts, verdicts and agent notes side by side.",
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