{
  "data": {
    "a": {
      "slug": "avalara",
      "name": "Avalara AvaTax",
      "vendor": "Avalara, Inc.",
      "vendorUrl": "https://www.avalara.com",
      "kind": "http-api",
      "category": "tax",
      "summary": "Avalara AvaTax calculates sales tax, VAT and GST for a transaction and records it for reporting. Agents reach it through the AvaTax REST v2 API or a hosted MCP server, with separate Avalara products for returns, exemption certificates and e-invoicing.",
      "url": "https://www.anchorterminal.com/tools/avalara",
      "markdownUrl": "https://www.anchorterminal.com/tools/avalara.md",
      "slimMarkdownUrl": "https://www.anchorterminal.com/tools/avalara.min.md",
      "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/avalara.json",
      "repo": "https://github.com/avadev/mcp",
      "license": "Proprietary service under the Avalara Service Terms. The SDKs on GitHub are Apache-2.0. The MCP repository holds a README only, with no licence file",
      "transports": [
        "http",
        "streamable-http"
      ],
      "remoteUrl": "https://rest.avatax.com/api/v2",
      "packages": [
        {
          "registry": "npm",
          "name": "avatax"
        },
        {
          "registry": "pypi",
          "name": "Avalara"
        }
      ],
      "auth": "mixed",
      "authNotes": "The MCP server uses OAuth through identity.avalara.com (sandbox ai-sbx.avlr.sh) with one scope, avalara_mcp, and a person signs in and consents in a browser. The identity server advertises PKCE (S256), a public client registration endpoint, device code and client credentials grants. The REST API accepts HTTP Basic with a username and password or with an account ID and licence key, or a bearer token from the identity server. Licence keys are account-wide, can be named, and a reset revokes the old key at once. What a caller can do follows the user's security role, such as AccountAdmin or CompanyUser. Access is self-serve through the trial signup, with no app review found.",
      "pricing": "paid",
      "pricingNotes": "Free 90-day AvaTax trial, no card, limited to 5 orders and 5 invoices a minute and 1,000 transactions a day, for evaluation with test data only under the AvaTax terms. Paid plans on the public pricing page are Core Compliance at $79 a state a month ($799 a state a year) and Core Compliance with SST services at $69 ($699 a year), both for businesses under $50M in annual revenue and both including AvaTax calculation and managed returns. Above that, plans are quoted. Avalara says price varies with products, states, integrations and monthly transaction volume, and no price per transaction or per API call is published (https://www.avalara.com/us/en/products/sales-and-use-tax/pricing.html, checked 2026-10-08).",
      "priceSummary": "$79 / mo",
      "where": "hosted",
      "x402": {
        "level": "no",
        "evidence": "No x402, MPP or L402 in the developer docs, the AvaTax API reference or the pricing page (checked 2026-10-08).",
        "endpoints": []
      },
      "toolCount": 10,
      "popularity": {
        "githubStars": 5,
        "npmWeekly": 330649,
        "pypiWeekly": 37689,
        "asOf": "2026-10-08"
      },
      "docsUrl": "https://developer.avalara.com/",
      "llmsTxt": "https://developer.avalara.com/llms.txt",
      "openapi": "https://sandbox-rest.avatax.com/swagger/v2/swagger.json",
      "registryName": "com.avalara/avatax",
      "capabilities": [
        "tax.calculate",
        "tax.transactions",
        "tax.exemptions",
        "tax.filing",
        "tax.invoicing"
      ],
      "tags": [
        "hosted",
        "paid",
        "free-trial",
        "mcp",
        "oauth",
        "openapi",
        "llms-txt",
        "typescript",
        "python",
        "java",
        "csharp",
        "sandbox",
        "status-page",
        "soc2",
        "iso27001"
      ],
      "lastRelease": "2026-09-16",
      "graded": true,
      "anchor": {
        "graded": true,
        "score": 68.8,
        "grade": "B",
        "agentReady": false,
        "rank": 162,
        "ranked": true,
        "rankOf": 629,
        "categoryRank": 1,
        "methodology": "0.4",
        "run": "2026-10-01",
        "scores": {
          "ergonomics": 84,
          "maintenance": 79,
          "payments": 30,
          "reliability": 62,
          "schema": 85,
          "security": 65,
          "transparency": 79
        },
        "pending": [
          "performance",
          "tasks"
        ],
        "assessment": {
          "confidence": "medium",
          "date": "2026-10-08"
        },
        "negative": 0,
        "verdict": "The REST API has a public Swagger file with 491 operations, a Markdown page per endpoint and a 90-day trial with no card. Production rate limits and prices per transaction are not published, the API patch notes stop at April 2023, and the tax calculation service was degraded for about 23 hours on 5 and 6 October 2026.",
        "bestFor": "An agent that must calculate and record US sales tax at address level, with VAT and GST in other countries, and hand the records to filing.",
        "strengths": [
          "Public Swagger 2.0 file with 491 operations, plus llms.txt and a Markdown page with a curl example for each endpoint",
          "Hosted MCP server at mcp.avalara.com/avatax with ten documented tools, OAuth sign-in and an entry in the official MCP registry as com.avalara/avatax",
          "90-day AvaTax trial with no card, limited to 5 orders and 5 invoices a minute and 1,000 transactions a day",
          "Errors return a code, number, description and help link, from a published list of 429 codes",
          "SDKs in six languages under Apache-2.0, released monthly, latest 26.9.0 on 16 September 2026"
        ],
        "weaknesses": [
          "Production rate limits are not published. The only numbers found are the trial limits and 5 calls a minute on report exports",
          "No price per transaction. Public plans are $79 a state a month, or $69 with SST services, and larger accounts are quoted",
          "The API patch notes page ends at version 23.4.1 of 26 April 2023, while production reports 26.9.2",
          "Tax calculation was degraded from 22:32 PT on 5 October to 21:20 PT on 6 October 2026, per status.avalara.com",
          "REST guides lead with HTTP Basic using a username and password or an account-wide licence key, and the MCP server has one scope, avalara_mcp"
        ],
        "agentNotes": [
          "Omit `type` or send SalesOrder for an estimate. A type ending in Invoice is recorded, and `commit` set to true locks it for reporting",
          "Retry a timed-out invoice with CreateOrAdjustTransaction, not CreateTransaction, which errors when a committed transaction has the same code",
          "Use sandbox-rest.avatax.com with sandbox credentials for tests. Production is rest.avatax.com and the two accounts are separate",
          "Add `$include=SummaryOnly` or LinesOnly to shrink transaction responses, and page lists with `$top` (1,000 at most) and `$skip`",
          "Call /api/v2/utilities/ping first. It answers without credentials and shows whether the credentials sent were accepted"
        ],
        "metrics": {
          "kind": "remote",
          "measured": false
        },
        "reviewCount": 0,
        "avgRating": 0,
        "history": [
          {
            "basis": "public evidence",
            "confidence": "medium",
            "grade": "B",
            "methodology": "0.4",
            "pending": [
              "performance",
              "tasks"
            ],
            "run": "2026-10-01",
            "runLabel": "October 2026 research run",
            "score": 68.8
          }
        ],
        "editorialScores": {
          "ergonomics": 84,
          "maintenance": 79,
          "payments": 30,
          "reliability": 62,
          "schema": 85,
          "security": 65,
          "transparency": 69
        },
        "provenanceScore": 88
      },
      "connect": {
        "install": "npm install avatax",
        "http": "curl -X POST \"https://sandbox-rest.avatax.com/api/v2/transactions/create\" \\\n  -H \"Authorization: Basic \u003ccredentials\u003e\" \\\n  -H \"Content-Type: application/json\" \\\n  -H \"Accept: application/json\" \\\n  -d @transaction.json",
        "config": {
          "mcpServers": {
            "avalara-avatax": {
              "type": "http",
              "url": "https://mcp.avalara.com/avatax"
            }
          }
        }
      },
      "letme": {
        "capability": "https://letme.dev/tax.calculate",
        "tool": "https://letme.dev/avalara"
      },
      "area": "domain-data",
      "unitPrices": [
        {
          "item": "Core Compliance (AvaTax and managed returns)",
          "unit": "month",
          "usd": 79,
          "note": "per state, billed monthly; $799 per state billed yearly; annual revenue under $50M"
        },
        {
          "item": "Core Compliance + SST Services",
          "unit": "month",
          "usd": 69,
          "note": "per state, billed monthly; $699 per state billed yearly; qualifying sellers"
        },
        {
          "item": "AvaTax free trial",
          "unit": "month",
          "usd": 0,
          "note": "90 days, 1,000 transactions a day, test data only"
        }
      ],
      "provenance": {
        "legalEntity": "Avalara, Inc.",
        "domain": "avalara.com",
        "domainRegistered": "2003-12-08",
        "endpointOnVendorDomain": true,
        "terms": "https://legal.avalara.com/",
        "privacy": "https://legal.avalara.com/dpa",
        "statusPage": "https://status.avalara.com",
        "changelog": "https://developer.avalara.com/patch-notes/",
        "securityTxt": "none",
        "checked": "2026-10-08",
        "notes": [
          "The Service Terms (version 7.1, effective 1 October 2026) name Avalara, Inc., a Washington corporation at 512 S. Mangum St. #100, Durham, NC 27701, as the contracting entity under New York law, and Avalara Europe Ltd. (England and Wales, No. 8446351) for European customers.",
          "The MCP server answers at mcp.avalara.com. The REST API answers at rest.avatax.com and sandbox-rest.avatax.com. RDAP gives avatax.com a registration date of 2005-01-27, and Avalara's own documentation names those hosts.",
          "www.avalara.com/.well-known/security.txt and developer.avalara.com/.well-known/security.txt return 404. Reports go through the vulnerability disclosure programme at https://www.avalara.com/us/en/legal/responsible-disclosure.html.",
          "The patch notes page lists API releases up to 23.4.1 on 26 April 2023 and nothing later. Current releases are visible only as the version in /api/v2/utilities/ping and as SDK tags on GitHub.",
          "RDAP for avalara.com gives a registration date of 2003-12-08. Privacy notices, the DPA and the subprocessor list are published together at legal.avalara.com/dpa."
        ],
        "score": 88
      },
      "pageJsonUrl": "https://www.anchorterminal.com/tools/avalara.json",
      "live": {
        "slug": "avalara",
        "probe": {
          "target": "https://rest.avatax.com/api/v2",
          "method": "get",
          "lastAt": "2026-10-08T18:20:24.975805032Z",
          "lastOk": true,
          "lastStatus": 401,
          "lastMs": 316,
          "lastNote": "asks for credentials",
          "authRequired": true,
          "uptime24h": 100,
          "uptime30d": 100,
          "p50ms24h": 327,
          "p95ms24h": 407,
          "samples24h": 33,
          "samples30d": 33,
          "days": [
            {
              "date": "2026-10-08",
              "probes": 33,
              "ok": 33
            }
          ]
        },
        "vendorStatus": {
          "page": "https://status.avalara.com",
          "indicator": "none",
          "summary": "All Systems Operational",
          "checkedAt": "2026-10-08T18:21:49.948703108Z"
        },
        "versions": [
          {
            "registry": "npm",
            "name": "avatax",
            "version": "26.9.0",
            "seenAt": "2026-10-08T16:00:19.162430293Z"
          },
          {
            "registry": "pypi",
            "name": "Avalara",
            "version": "26.9.0",
            "released": "2026-09-16",
            "seenAt": "2026-10-08T16:00:23.243148692Z"
          }
        ],
        "githubStars": 5,
        "npmWeekly": 330649,
        "pypiWeekly": 37689,
        "securityTxt": {
          "url": "https://avalara.com/.well-known/security.txt",
          "state": "none",
          "checkedAt": "2026-10-08T15:38:36.211738872Z"
        },
        "pages": [
          {
            "url": "https://developer.avalara.com/patch-notes/",
            "kind": "changelog",
            "status": 200,
            "checkedAt": "2026-10-08T18:17:04.362764489Z",
            "changedAt": "0001-01-01T00:00:00Z",
            "fingerprint": "12c3dd83a580"
          },
          {
            "url": "https://legal.avalara.com/dpa",
            "kind": "privacy",
            "status": 200,
            "checkedAt": "2026-10-08T18:21:25.299594822Z",
            "changedAt": "0001-01-01T00:00:00Z",
            "fingerprint": "1d325483f118"
          },
          {
            "url": "https://legal.avalara.com/",
            "kind": "terms",
            "status": 200,
            "checkedAt": "2026-10-08T18:21:22.64286746Z",
            "changedAt": "0001-01-01T00:00:00Z",
            "fingerprint": "ac0c20791779"
          }
        ],
        "updatedAt": "2026-10-08T18:21:49.948703108Z"
      }
    },
    "answer": "Avalara AvaTax scores 68.8 (B) on agent readiness against Quaderno's 59.5 (C), and leads in 5 of 7 scored categories. Quaderno leads on reliability.",
    "b": {
      "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": 377,
        "ranked": true,
        "rankOf": 629,
        "categoryRank": 3,
        "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": "2026-10-08T18:20:38.279331239Z",
          "lastOk": true,
          "lastStatus": 404,
          "lastMs": 105,
          "authRequired": false,
          "uptime24h": 100,
          "uptime30d": 100,
          "p50ms24h": 107,
          "p95ms24h": 151,
          "samples24h": 33,
          "samples30d": 33,
          "days": [
            {
              "date": "2026-10-08",
              "probes": 33,
              "ok": 33
            }
          ]
        },
        "vendorStatus": {
          "page": "https://quaderno.statuspage.io",
          "indicator": "none",
          "summary": "All Systems Operational",
          "checkedAt": "2026-10-08T18:22:17.031514787Z"
        },
        "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"
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        "updatedAt": "2026-10-08T18:23:37.065141515Z"
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    "facts": [
      {
        "a": "HTTP API",
        "b": "HTTP API",
        "name": "Kind"
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      {
        "a": "Avalara, Inc.",
        "b": "Recrea Systems, SL",
        "name": "Vendor"
      },
      {
        "a": "https://rest.avatax.com/api/v2",
        "b": "https://quadernoapp.com/api",
        "name": "Hosted endpoint"
      },
      {
        "a": "HTTP, Streamable HTTP",
        "b": "HTTP",
        "name": "Transports"
      },
      {
        "a": "OAuth or key",
        "b": "OAuth or key",
        "name": "Auth"
      },
      {
        "a": "Paid",
        "b": "Paid",
        "name": "Pricing"
      },
      {
        "a": "no",
        "b": "no",
        "name": "x402"
      },
      {
        "a": "Proprietary service under the Avalara Service Terms. The SDKs on GitHub are Apache-2.0. The MCP repository holds a README only, with no licence file",
        "b": "Proprietary service under Quaderno's terms of service. The Ruby library on GitHub is MIT",
        "name": "Licence"
      },
      {
        "a": "10",
        "b": "none",
        "name": "Tools exposed"
      },
      {
        "a": "no",
        "b": "no",
        "name": "Read-only variant documented"
      },
      {
        "a": "yes",
        "b": "yes",
        "name": "llms.txt"
      },
      {
        "a": "com.avalara/avatax",
        "b": "not listed",
        "name": "MCP registry"
      },
      {
        "a": "2026-09-16",
        "b": "2026-07-04",
        "name": "Last release"
      },
      {
        "a": "2023-05-01",
        "b": "2026-09-15",
        "name": "Terms last updated"
      },
      {
        "a": "2022-08-08",
        "b": "2024-05-16",
        "name": "Privacy policy last updated"
      },
      {
        "a": "not found in the text",
        "b": "not found in the text",
        "name": "Customer content may train models"
      },
      {
        "a": "not found in the text",
        "b": "yes",
        "name": "Terms restrict automated access"
      },
      {
        "a": "yes",
        "b": "yes",
        "name": "Terms restrict benchmarking"
      },
      {
        "a": "not found in the text",
        "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": "5 stars, 331k npm/wk, 38k PyPI/wk",
        "b": "15 stars",
        "name": "Popularity"
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    "faq": [
      {
        "answer": "Avalara AvaTax scores 68.8 (B) on agent readiness against Quaderno's 59.5 (C), and leads in 5 of 7 scored categories. Quaderno leads on reliability.",
        "question": "Which is better for AI agents, Avalara AvaTax or Quaderno?"
      },
      {
        "answer": "Both take an API key or an OAuth sign-in.",
        "question": "Do Avalara AvaTax and Quaderno need an API key?"
      },
      {
        "answer": "Yes. Avalara AvaTax has a hosted endpoint at https://rest.avatax.com/api/v2 and Quaderno at https://quadernoapp.com/api.",
        "question": "Can an agent call Avalara AvaTax and Quaderno without installing anything?"
      }
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    "goodFor": [
      {
        "aheadOn": [
          "Schema \u0026 documentation, 85 against 77",
          "Agent ergonomics, 84 against 56",
          "Security \u0026 auth, 65 against 39",
          "Maintenance \u0026 community, 79 against 28"
        ],
        "also": null,
        "goodFor": "An agent that must calculate and record US sales tax at address level, with VAT and GST in other countries, and hand the records to filing.",
        "slug": "avalara",
        "watchFor": "Production rate limits are not published. The only numbers found are the trial limits and 5 calls a minute on report exports"
      },
      {
        "aheadOn": [
          "Reliability, 91 against 62"
        ],
        "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)"
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      {
        "json": "https://www.anchorterminal.com/compare/anrok-vs-quaderno.json",
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        "url": "https://www.anchorterminal.com/compare/anrok-vs-quaderno"
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      {
        "json": "https://www.anchorterminal.com/compare/avalara-vs-taxjar.json",
        "title": "Avalara AvaTax vs TaxJar",
        "url": "https://www.anchorterminal.com/compare/avalara-vs-taxjar"
      },
      {
        "json": "https://www.anchorterminal.com/compare/avalara-vs-vertex-tax.json",
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      {
        "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"
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    "scores": [
      {
        "avalara": 62,
        "by": 29,
        "edge": "quaderno",
        "key": "reliability",
        "name": "Reliability",
        "quaderno": 91,
        "weight": 16
      },
      {
        "key": "performance",
        "name": "Performance",
        "pending": true,
        "weight": 10
      },
      {
        "avalara": 85,
        "by": 8,
        "edge": "avalara",
        "key": "schema",
        "name": "Schema \u0026 documentation",
        "quaderno": 77,
        "weight": 13
      },
      {
        "avalara": 84,
        "by": 28,
        "edge": "avalara",
        "key": "ergonomics",
        "name": "Agent ergonomics",
        "quaderno": 56,
        "weight": 13
      },
      {
        "avalara": 65,
        "by": 26,
        "edge": "avalara",
        "key": "security",
        "name": "Security \u0026 auth",
        "quaderno": 39,
        "weight": 14
      },
      {
        "avalara": 30,
        "by": 0,
        "edge": "",
        "key": "payments",
        "name": "Payments \u0026 pricing",
        "quaderno": 30,
        "weight": 10
      },
      {
        "key": "tasks",
        "name": "Task success",
        "pending": true,
        "weight": 10
      },
      {
        "avalara": 79,
        "by": 51,
        "edge": "avalara",
        "key": "maintenance",
        "name": "Maintenance \u0026 community",
        "quaderno": 28,
        "weight": 7
      },
      {
        "avalara": 79,
        "by": 3,
        "edge": "avalara",
        "key": "transparency",
        "name": "Transparency \u0026 trust",
        "quaderno": 76,
        "weight": 7
      }
    ],
    "summary": "Avalara AvaTax scores 68.8 (B) on agent readiness against Quaderno's 59.5 (C), and leads in 5 of 7 scored categories. Quaderno leads on reliability. Both do tax calculate.",
    "verdicts": {
      "avalara": "The REST API has a public Swagger file with 491 operations, a Markdown page per endpoint and a 90-day trial with no card. Production rate limits and prices per transaction are not published, the API patch notes stop at April 2023, and the tax calculation service was degraded for about 23 hours on 5 and 6 October 2026.",
      "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."
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  "markdown": "Avalara AvaTax scores 68.8 (B) on agent readiness against Quaderno's 59.5 (C), and leads in 5 of 7 scored categories. Quaderno leads on reliability. Both do tax calculate.\n\n- Avalara AvaTax: grade B, 68.8/100, rank #162 of 629. Markdown https://www.anchorterminal.com/tools/avalara.md · JSON https://www.anchorterminal.com/api/v1/tools/avalara.json\n- Quaderno: grade C, 59.5/100, rank #377 of 629. Markdown https://www.anchorterminal.com/tools/quaderno.md · JSON https://www.anchorterminal.com/api/v1/tools/quaderno.json\n\n## Which one, for what\n\n### Avalara AvaTax (B)\n\nGood for: An agent that must calculate and record US sales tax at address level, with VAT and GST in other countries, and hand the records to filing.\n\nAhead on:\n- Schema \u0026 documentation, 85 against 77\n- Agent ergonomics, 84 against 56\n- Security \u0026 auth, 65 against 39\n- Maintenance \u0026 community, 79 against 28\n\nWatch for: Production rate limits are not published. The only numbers found are the trial limits and 5 calls a minute on report exports\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 62\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\n## Score by category\n\n| Category | Weight | Avalara AvaTax | Quaderno | Edge |\n| --- | --- | --- | --- | --- |\n| Reliability | 16% (20 this run) | 62 | 91 | Quaderno +29 |\n| Performance | 10%, pending | pending | pending | not scored in this run |\n| Schema \u0026 documentation | 13% (16.2 this run) | 85 | 77 | Avalara AvaTax +8 |\n| Agent ergonomics | 13% (16.2 this run) | 84 | 56 | Avalara AvaTax +28 |\n| Security \u0026 auth | 14% (17.5 this run) | 65 | 39 | Avalara AvaTax +26 |\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) | 79 | 28 | Avalara AvaTax +51 |\n| Transparency \u0026 trust | 7% (8.8 this run) | 79 | 76 | Avalara AvaTax +3 |\n| Negative events | ≤15 | 0 | 0 | |\n| **Total** | | **68.8 · B** | **59.5 · C** | |\n\n## Facts side by side\n\n| Fact | Avalara AvaTax | Quaderno |\n| --- | --- | --- |\n| Kind | HTTP API | HTTP API |\n| Vendor | Avalara, Inc. | Recrea Systems, SL |\n| Hosted endpoint | `https://rest.avatax.com/api/v2` | `https://quadernoapp.com/api` |\n| Transports | HTTP, Streamable HTTP | HTTP |\n| Auth | OAuth or key | OAuth or key |\n| Pricing | Paid | Paid |\n| x402 | no | no |\n| Licence | Proprietary service under the Avalara Service Terms. The SDKs on GitHub are Apache-2.0. The MCP repository holds a README only, with no licence file | Proprietary service under Quaderno's terms of service. The Ruby library on GitHub is MIT |\n| Tools exposed | 10 | none |\n| Read-only variant documented | no | no |\n| llms.txt | yes | yes |\n| MCP registry | `com.avalara/avatax` | not listed |\n| Last release | 2026-09-16 | 2026-07-04 |\n| Terms last updated | 2023-05-01 | 2026-09-15 |\n| Privacy policy last updated | 2022-08-08 | 2024-05-16 |\n| Customer content may train models | not found in the text | not found in the text |\n| Terms restrict automated access | not found in the text | yes |\n| Terms restrict benchmarking | yes | yes |\n| Terms or service can change without notice | not found in the text | yes |\n| Arbitration or class-action waiver | not found in the text | not found in the text |\n| Popularity | 5 stars, 331k npm/wk, 38k PyPI/wk | 15 stars |\n\n## Verdicts\n\n**Avalara AvaTax.** The REST API has a public Swagger file with 491 operations, a Markdown page per endpoint and a 90-day trial with no card. Production rate limits and prices per transaction are not published, the API patch notes stop at April 2023, and the tax calculation service was degraded for about 23 hours on 5 and 6 October 2026.\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## Before you call either\n\n### Avalara AvaTax\n\n1. Omit `type` or send SalesOrder for an estimate. A type ending in Invoice is recorded, and `commit` set to true locks it for reporting\n2. Retry a timed-out invoice with CreateOrAdjustTransaction, not CreateTransaction, which errors when a committed transaction has the same code\n3. Use sandbox-rest.avatax.com with sandbox credentials for tests. Production is rest.avatax.com and the two accounts are separate\n4. Add `$include=SummaryOnly` or LinesOnly to shrink transaction responses, and page lists with `$top` (1,000 at most) and `$skip`\n5. Call /api/v2/utilities/ping first. It answers without credentials and shows whether the credentials sent were accepted\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## Questions\n\n### Which is better for AI agents, Avalara AvaTax or Quaderno?\n\nAvalara AvaTax scores 68.8 (B) on agent readiness against Quaderno's 59.5 (C), and leads in 5 of 7 scored categories. Quaderno leads on reliability.\n\n### Do Avalara AvaTax and Quaderno need an API key?\n\nBoth take an API key or an OAuth sign-in.\n\n### Can an agent call Avalara AvaTax and Quaderno without installing anything?\n\nYes. Avalara AvaTax has a hosted endpoint at https://rest.avatax.com/api/v2 and Quaderno at https://quadernoapp.com/api.\n\n\n## For agents\n\n- This comparison as JSON: https://www.anchorterminal.com/compare/avalara-vs-quaderno.json, and with the fewest tokens: https://www.anchorterminal.com/compare/avalara-vs-quaderno.min.md\n- Over MCP at https://www.anchorterminal.com/mcp (no key): `compare_tools {\"a\": \"avalara\", \"b\": \"quaderno\"}`. From a terminal: `anchor compare avalara quaderno`\n- Each listing in full: https://www.anchorterminal.com/api/v1/tools/avalara.json and https://www.anchorterminal.com/api/v1/tools/quaderno.json\n\n## Other comparisons with Avalara AvaTax or Quaderno\n\n- [Anrok vs Avalara AvaTax](https://www.anchorterminal.com/compare/anrok-vs-avalara.md)\n- [Anrok vs Quaderno](https://www.anchorterminal.com/compare/anrok-vs-quaderno.md)\n- [Avalara AvaTax vs TaxJar](https://www.anchorterminal.com/compare/avalara-vs-taxjar.md)\n- [Avalara AvaTax vs Vertex O Series](https://www.anchorterminal.com/compare/avalara-vs-vertex-tax.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",
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    "description": "Avalara AvaTax scores 68.8 (B) on agent readiness against Quaderno's 59.5 (C), and leads in 5 of 7 scored categories. Quaderno leads on reliability. Both do tax calculate. Category scores, facts, verdicts and agent notes side by side.",
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