{
  "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": "2026-10-08T19:08:39.846678929Z",
          "lastOk": true,
          "lastStatus": 401,
          "lastMs": 358,
          "lastNote": "asks for credentials",
          "authRequired": true,
          "uptime24h": 100,
          "uptime30d": 100,
          "p50ms24h": 327,
          "p95ms24h": 363,
          "samples24h": 42,
          "samples30d": 42,
          "days": [
            {
              "date": "2026-10-08",
              "probes": 42,
              "ok": 42
            }
          ]
        },
        "vendorStatus": {
          "page": "https://status.avalara.com",
          "indicator": "none",
          "summary": "All Systems Operational",
          "checkedAt": "2026-10-08T19:06:27.282380712Z"
        },
        "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://www.avalara.com/us/en/products/sales-and-use-tax/pricing.html",
            "kind": "pricing",
            "status": 200,
            "checkedAt": "2026-10-08T18:26:21.240577756Z",
            "changedAt": "0001-01-01T00:00:00Z",
            "fingerprint": "ab348ca6c51d"
          },
          {
            "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": "2026-10-08T19:08:39.846678929Z"
      }
    },
    "answer": "Avalara AvaTax scores 68.8 (B) on agent readiness against TaxJar's 57.6 (C), and leads in 5 of 7 scored categories. TaxJar leads on reliability.",
    "b": {
      "slug": "taxjar",
      "name": "TaxJar",
      "vendor": "TaxJar (Stripe)",
      "vendorUrl": "https://www.taxjar.com",
      "kind": "http-api",
      "category": "tax",
      "summary": "TaxJar is Stripe's US sales tax service for businesses that sell across states. Its REST API calculates tax for an order, looks up rates by address, records orders and refunds for reporting, and stores exempt customers.",
      "url": "https://www.anchorterminal.com/tools/taxjar",
      "markdownUrl": "https://www.anchorterminal.com/tools/taxjar.md",
      "slimMarkdownUrl": "https://www.anchorterminal.com/tools/taxjar.min.md",
      "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/taxjar.json",
      "repo": "https://github.com/taxjar/taxjar-node",
      "license": "Proprietary service under TaxJar's terms of service and API licence agreement. The official API clients on GitHub are MIT",
      "transports": [
        "http"
      ],
      "remoteUrl": "https://api.taxjar.com/v2",
      "packages": [
        {
          "registry": "npm",
          "name": "taxjar"
        },
        {
          "registry": "pypi",
          "name": "taxjar"
        }
      ],
      "auth": "api-key",
      "authNotes": "A self-serve API token, generated by a signed-in user at Account \u003e TaxJar API in the web app and sent as `Authorization: Bearer \u003ctoken\u003e`. The token has no scopes and covers every endpoint for that account, deletes included. API access needs the Professional plan or the 30-day trial. The sandbox takes its own token. No OAuth, app review or partner approval applies.",
      "pricing": "paid",
      "pricingNotes": "The API needs the Professional plan, from $99 a month at 200 orders, with higher order tiers on a selector. Each calculation or rate lookup counts as a tenth of an order, errors included. A 30-day trial with API access needs no card, so an agent's owner can start without a contract. The sandbox comes with Professional plans (checked 2026-10-08).",
      "priceSummary": "$99 / mo",
      "where": "hosted",
      "x402": {
        "level": "no",
        "evidence": "No x402, MPP or L402 in the API reference, the API guides or the pricing page (checked 2026-10-08).",
        "endpoints": []
      },
      "toolCount": null,
      "popularity": {
        "githubStars": 57,
        "npmWeekly": 95036,
        "pypiWeekly": 49713,
        "asOf": "2026-10-08"
      },
      "docsUrl": "https://developers.taxjar.com/api/reference/",
      "capabilities": [
        "tax.calculate",
        "tax.transactions",
        "tax.exemptions",
        "shipping.address-validation"
      ],
      "tags": [
        "hosted",
        "closed-source",
        "api-key",
        "sandbox",
        "no-card",
        "python",
        "typescript",
        "ruby",
        "php",
        "java",
        "go",
        "dotnet",
        "status-page",
        "soc2"
      ],
      "lastRelease": "2026-09-02",
      "graded": true,
      "anchor": {
        "graded": true,
        "score": 57.6,
        "grade": "C",
        "agentReady": false,
        "rank": 417,
        "ranked": true,
        "rankOf": 629,
        "categoryRank": 4,
        "methodology": "0.4",
        "run": "2026-10-01",
        "scores": {
          "ergonomics": 61,
          "maintenance": 64,
          "payments": 30,
          "reliability": 84,
          "schema": 48,
          "security": 43,
          "transparency": 71
        },
        "pending": [
          "performance",
          "tasks"
        ],
        "assessment": {
          "confidence": "medium",
          "date": "2026-10-08"
        },
        "negative": 0,
        "verdict": "A 21-operation REST API with a no-card 30-day trial, caller-chosen transaction IDs that make order pushes safe to repeat, and no status-page incident since March 2026. No OpenAPI spec or llms.txt was found, the API changelog stops at January 2022, tokens carry no scopes, and calculation is US-only for new accounts.",
        "bestFor": "An agent working for a US seller that needs sales tax on an order at checkout and a record of orders and refunds for state reporting, with exempt customers handled by ID.",
        "strengths": [
          "30-day trial with Professional plan access, the API included, and no card needed at signup",
          "Orders and refunds take a caller-chosen `transaction_id`. A duplicate create returns 422 and the docs direct a PUT update",
          "status.taxjar.com lists seven components and no incident since 26 March 2026",
          "Rate limits published as 10,000 requests a minute on Professional and 25,000 on Premium",
          "Official clients for seven languages. The Node client reached 5.0.0 on npm on 2 September 2026 and .NET 5.0.0 on NuGet on 4 August 2026"
        ],
        "weaknesses": [
          "No OpenAPI spec or llms.txt was found. The taxjar/openapi repository on GitHub holds only a README",
          "The API changelog's last entry is 24 January 2022, and no deprecation policy was found",
          "Calculation covers the United States only for new accounts. The docs point other countries to Stripe Tax",
          "API tokens carry no scopes or read-only mode, and the same token can delete transactions and customers",
          "Calls that return an error still count as a tenth of an order against the plan, per the help centre"
        ],
        "agentNotes": [
          "Send `x-api-version: 2022-01-24` on every call. Accounts opened before 3 February 2022 default to an older version with weaker validation",
          "Pass `nexus_addresses[]` or keep nexus states in the account. Without nexus the API returns zero tax and reports no error",
          "Create orders with your own `transaction_id`. On 422 the order already exists, so send a PUT to update it",
          "Post JSON with `Content-Type: application/json`. Form-encoded arrays such as `line_items[]` can return 406",
          "Cache calculations and skip states without nexus. Each calculation or rate lookup counts as a tenth of an order, errors included"
        ],
        "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": 57.6
          }
        ],
        "editorialScores": {
          "ergonomics": 61,
          "maintenance": 64,
          "payments": 30,
          "reliability": 84,
          "schema": 48,
          "security": 43,
          "transparency": 55
        },
        "provenanceScore": 87
      },
      "connect": {
        "install": "npm install taxjar",
        "http": "curl https://api.taxjar.com/v2/categories \\\n  -H \"Authorization: Bearer ${TAXJAR_API_KEY}\""
      },
      "letme": {
        "capability": "https://letme.dev/tax.calculate",
        "tool": "https://letme.dev/taxjar"
      },
      "area": "domain-data",
      "unitPrices": [
        {
          "item": "Professional, 200 orders a month",
          "unit": "month",
          "usd": 99,
          "note": "the plan with API access; a calculation or rate lookup counts as a tenth of an order"
        },
        {
          "item": "Professional, 500 orders a month",
          "unit": "month",
          "usd": 249,
          "note": "per the flex fee article"
        },
        {
          "item": "Professional, 1,000 orders a month",
          "unit": "month",
          "usd": 499,
          "note": "per the flex fee article"
        },
        {
          "item": "Starter, 200 orders a month",
          "unit": "month",
          "usd": 39,
          "note": "no API access"
        },
        {
          "item": "AutoFile return beyond included credits, Professional",
          "unit": "tx",
          "usd": 55,
          "note": "four credits a year included; $50 on Starter"
        }
      ],
      "provenance": {
        "legalEntity": "TPS Unlimited, Inc. (d/b/a TaxJar, a wholly owned subsidiary of Stripe, Inc.)",
        "domain": "taxjar.com",
        "domainRegistered": "2012-03-02",
        "endpointOnVendorDomain": true,
        "terms": "https://www.taxjar.com/terms-of-service",
        "privacy": "https://www.taxjar.com/privacy",
        "statusPage": "https://status.taxjar.com",
        "changelog": "https://developers.taxjar.com/api/reference/#changelog",
        "securityTxt": "none",
        "checked": "2026-10-08",
        "notes": [
          "The terms of service and the API licence agreement on the same page (last updated 14 May 2026) are with TPS Unlimited, Inc. d/b/a TaxJar. The data processing agreement of the same date calls it a wholly owned subsidiary of Stripe, Inc.",
          "The privacy policy (last updated 7 January 2022) gives TPS Unlimited, Inc., 462 Washington St. #3066, Woburn, Massachusetts 01888, and adds (A Stripe Company). The about page says Stripe acquired TaxJar in 2021.",
          "Stripe is listed separately on Anchor Terminal. TaxJar keeps its own API, account system, terms and status page, and its sub-processor list names Stripe, LLC and affiliates for billing.",
          "The API host is api.taxjar.com and the sandbox api.sandbox.taxjar.com. RDAP gives a registration date of 2012-03-02 for taxjar.com, with Com Laude as registrar.",
          "www.taxjar.com/.well-known/security.txt and api.taxjar.com/.well-known/security.txt return 404. stripe.com serves a valid security.txt that points to HackerOne, and we didn't establish whether that programme covers TaxJar hosts.",
          "The changelog is a section of the API reference page, and its newest entry is dated 24 January 2022."
        ],
        "score": 87
      },
      "pageJsonUrl": "https://www.anchorterminal.com/tools/taxjar.json",
      "live": {
        "slug": "taxjar",
        "probe": {
          "target": "https://api.taxjar.com/v2",
          "method": "get",
          "lastAt": "2026-10-08T19:09:00.028246346Z",
          "lastOk": true,
          "lastStatus": 404,
          "lastMs": 280,
          "authRequired": false,
          "uptime24h": 100,
          "uptime30d": 100,
          "p50ms24h": 263,
          "p95ms24h": 292,
          "samples24h": 42,
          "samples30d": 42,
          "days": [
            {
              "date": "2026-10-08",
              "probes": 42,
              "ok": 42
            }
          ]
        },
        "vendorStatus": {
          "page": "https://status.taxjar.com",
          "indicator": "none",
          "summary": "All Systems Operational",
          "checkedAt": "2026-10-08T19:07:01.407121094Z"
        },
        "versions": [
          {
            "registry": "github",
            "name": "taxjar/taxjar-node",
            "version": "v5.0.0",
            "released": "2026-02-03",
            "seenAt": "2026-10-08T16:31:32.062161715Z"
          },
          {
            "registry": "npm",
            "name": "taxjar",
            "version": "5.0.0",
            "seenAt": "2026-10-08T16:31:31.016239944Z"
          },
          {
            "registry": "pypi",
            "name": "taxjar",
            "version": "2.0.1",
            "released": "2025-04-14",
            "seenAt": "2026-10-08T16:31:31.869241068Z"
          }
        ],
        "githubStars": 57,
        "npmWeekly": 95036,
        "pypiWeekly": 49713,
        "securityTxt": {
          "url": "https://taxjar.com/.well-known/security.txt",
          "state": "none",
          "checkedAt": "2026-10-08T15:39:06.776426979Z"
        },
        "pages": [
          {
            "url": "https://developers.taxjar.com/api/reference/",
            "kind": "changelog",
            "status": 200,
            "checkedAt": "2026-10-08T18:18:03.269696625Z",
            "changedAt": "0001-01-01T00:00:00Z",
            "fingerprint": "fb0fe884536c"
          },
          {
            "url": "https://www.taxjar.com/privacy",
            "kind": "privacy",
            "status": 200,
            "checkedAt": "2026-10-08T18:30:56.737296724Z",
            "changedAt": "0001-01-01T00:00:00Z",
            "fingerprint": "b22cd1da61e7"
          },
          {
            "url": "https://www.taxjar.com/terms-of-service",
            "kind": "terms",
            "status": 200,
            "checkedAt": "2026-10-08T18:30:59.304705205Z",
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            "fingerprint": "7e694d9c9de5"
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        "updatedAt": "2026-10-08T19:09:00.028246346Z"
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        "b": "HTTP API",
        "name": "Kind"
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      {
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        "b": "TaxJar (Stripe)",
        "name": "Vendor"
      },
      {
        "a": "https://rest.avatax.com/api/v2",
        "b": "https://api.taxjar.com/v2",
        "name": "Hosted endpoint"
      },
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        "b": "HTTP",
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      {
        "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 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 TaxJar's terms of service and API licence agreement. The official API clients on GitHub are MIT",
        "name": "Licence"
      },
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        "a": "10",
        "b": "none",
        "name": "Tools exposed"
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      {
        "a": "no",
        "b": "no",
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      },
      {
        "a": "yes",
        "b": "no",
        "name": "llms.txt"
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      {
        "a": "com.avalara/avatax",
        "b": "not listed",
        "name": "MCP registry"
      },
      {
        "a": "2026-09-16",
        "b": "2026-09-02",
        "name": "Last release"
      },
      {
        "a": "2023-05-01",
        "b": "2026-05-14",
        "name": "Terms last updated"
      },
      {
        "a": "2022-08-08",
        "b": "2022-01-07",
        "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": "not found in the text",
        "name": "Terms restrict automated access"
      },
      {
        "a": "yes",
        "b": "yes",
        "name": "Terms restrict benchmarking"
      },
      {
        "a": "not found in the text",
        "b": "not found in the text",
        "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": "57 stars, 95k npm/wk, 50k PyPI/wk",
        "name": "Popularity"
      }
    ],
    "faq": [
      {
        "answer": "Avalara AvaTax scores 68.8 (B) on agent readiness against TaxJar's 57.6 (C), and leads in 5 of 7 scored categories. TaxJar leads on reliability.",
        "question": "Which is better for AI agents, Avalara AvaTax or TaxJar?"
      },
      {
        "answer": "Avalara AvaTax takes an API key or an OAuth sign-in. TaxJar needs an API key.",
        "question": "Do Avalara AvaTax and TaxJar need an API key?"
      },
      {
        "answer": "Yes. Avalara AvaTax has a hosted endpoint at https://rest.avatax.com/api/v2 and TaxJar at https://api.taxjar.com/v2.",
        "question": "Can an agent call Avalara AvaTax and TaxJar without installing anything?"
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          "Schema \u0026 documentation, 85 against 48",
          "Agent ergonomics, 84 against 61",
          "Security \u0026 auth, 65 against 43",
          "Maintenance \u0026 community, 79 against 64",
          "Transparency \u0026 trust, 79 against 71"
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        "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"
      },
      {
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        "also": [
          "Free to start without a card"
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        "goodFor": "An agent working for a US seller that needs sales tax on an order at checkout and a record of orders and refunds for state reporting, with exempt customers handled by ID.",
        "slug": "taxjar",
        "watchFor": "No OpenAPI spec or llms.txt was found. The taxjar/openapi repository on GitHub holds only a README"
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      {
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        "url": "https://www.anchorterminal.com/compare/taxjar-vs-vertex-tax"
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    "scores": [
      {
        "avalara": 62,
        "by": 22,
        "edge": "taxjar",
        "key": "reliability",
        "name": "Reliability",
        "taxjar": 84,
        "weight": 16
      },
      {
        "key": "performance",
        "name": "Performance",
        "pending": true,
        "weight": 10
      },
      {
        "avalara": 85,
        "by": 37,
        "edge": "avalara",
        "key": "schema",
        "name": "Schema \u0026 documentation",
        "taxjar": 48,
        "weight": 13
      },
      {
        "avalara": 84,
        "by": 23,
        "edge": "avalara",
        "key": "ergonomics",
        "name": "Agent ergonomics",
        "taxjar": 61,
        "weight": 13
      },
      {
        "avalara": 65,
        "by": 22,
        "edge": "avalara",
        "key": "security",
        "name": "Security \u0026 auth",
        "taxjar": 43,
        "weight": 14
      },
      {
        "avalara": 30,
        "by": 0,
        "edge": "",
        "key": "payments",
        "name": "Payments \u0026 pricing",
        "taxjar": 30,
        "weight": 10
      },
      {
        "key": "tasks",
        "name": "Task success",
        "pending": true,
        "weight": 10
      },
      {
        "avalara": 79,
        "by": 15,
        "edge": "avalara",
        "key": "maintenance",
        "name": "Maintenance \u0026 community",
        "taxjar": 64,
        "weight": 7
      },
      {
        "avalara": 79,
        "by": 8,
        "edge": "avalara",
        "key": "transparency",
        "name": "Transparency \u0026 trust",
        "taxjar": 71,
        "weight": 7
      }
    ],
    "summary": "Avalara AvaTax scores 68.8 (B) on agent readiness against TaxJar's 57.6 (C), and leads in 5 of 7 scored categories. TaxJar 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.",
      "taxjar": "A 21-operation REST API with a no-card 30-day trial, caller-chosen transaction IDs that make order pushes safe to repeat, and no status-page incident since March 2026. No OpenAPI spec or llms.txt was found, the API changelog stops at January 2022, tokens carry no scopes, and calculation is US-only for new accounts."
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  "markdown": "Avalara AvaTax scores 68.8 (B) on agent readiness against TaxJar's 57.6 (C), and leads in 5 of 7 scored categories. TaxJar 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- TaxJar: grade C, 57.6/100, rank #417 of 629. Markdown https://www.anchorterminal.com/tools/taxjar.md · JSON https://www.anchorterminal.com/api/v1/tools/taxjar.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 48\n- Agent ergonomics, 84 against 61\n- Security \u0026 auth, 65 against 43\n- Maintenance \u0026 community, 79 against 64\n- Transparency \u0026 trust, 79 against 71\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### TaxJar (C)\n\nGood for: An agent working for a US seller that needs sales tax on an order at checkout and a record of orders and refunds for state reporting, with exempt customers handled by ID.\n\nAhead on:\n- Reliability, 84 against 62\n\nAlso in its favour:\n- Free to start without a card\n\nWatch for: No OpenAPI spec or llms.txt was found. The taxjar/openapi repository on GitHub holds only a README\n\n\n## Score by category\n\n| Category | Weight | Avalara AvaTax | TaxJar | Edge |\n| --- | --- | --- | --- | --- |\n| Reliability | 16% (20 this run) | 62 | 84 | TaxJar +22 |\n| Performance | 10%, pending | pending | pending | not scored in this run |\n| Schema \u0026 documentation | 13% (16.2 this run) | 85 | 48 | Avalara AvaTax +37 |\n| Agent ergonomics | 13% (16.2 this run) | 84 | 61 | Avalara AvaTax +23 |\n| Security \u0026 auth | 14% (17.5 this run) | 65 | 43 | Avalara AvaTax +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) | 79 | 64 | Avalara AvaTax +15 |\n| Transparency \u0026 trust | 7% (8.8 this run) | 79 | 71 | Avalara AvaTax +8 |\n| Negative events | ≤15 | 0 | 0 | |\n| **Total** | | **68.8 · B** | **57.6 · C** | |\n\n## Facts side by side\n\n| Fact | Avalara AvaTax | TaxJar |\n| --- | --- | --- |\n| Kind | HTTP API | HTTP API |\n| Vendor | Avalara, Inc. | TaxJar (Stripe) |\n| Hosted endpoint | `https://rest.avatax.com/api/v2` | `https://api.taxjar.com/v2` |\n| Transports | HTTP, Streamable HTTP | HTTP |\n| Auth | OAuth or key | API 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 TaxJar's terms of service and API licence agreement. The official API clients on GitHub are MIT |\n| Tools exposed | 10 | none |\n| Read-only variant documented | no | no |\n| llms.txt | yes | no |\n| MCP registry | `com.avalara/avatax` | not listed |\n| Last release | 2026-09-16 | 2026-09-02 |\n| Terms last updated | 2023-05-01 | 2026-05-14 |\n| Privacy policy last updated | 2022-08-08 | 2022-01-07 |\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 | not found in the text |\n| Terms restrict benchmarking | yes | yes |\n| Terms or service can change without notice | not found in the text | not found in the text |\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 | 57 stars, 95k npm/wk, 50k PyPI/wk |\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**TaxJar.** A 21-operation REST API with a no-card 30-day trial, caller-chosen transaction IDs that make order pushes safe to repeat, and no status-page incident since March 2026. No OpenAPI spec or llms.txt was found, the API changelog stops at January 2022, tokens carry no scopes, and calculation is US-only for new accounts.\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### TaxJar\n\n1. Send `x-api-version: 2022-01-24` on every call. Accounts opened before 3 February 2022 default to an older version with weaker validation\n2. Pass `nexus_addresses[]` or keep nexus states in the account. Without nexus the API returns zero tax and reports no error\n3. Create orders with your own `transaction_id`. On 422 the order already exists, so send a PUT to update it\n4. Post JSON with `Content-Type: application/json`. Form-encoded arrays such as `line_items[]` can return 406\n5. Cache calculations and skip states without nexus. Each calculation or rate lookup counts as a tenth of an order, errors included\n\n## Questions\n\n### Which is better for AI agents, Avalara AvaTax or TaxJar?\n\nAvalara AvaTax scores 68.8 (B) on agent readiness against TaxJar's 57.6 (C), and leads in 5 of 7 scored categories. TaxJar leads on reliability.\n\n### Do Avalara AvaTax and TaxJar need an API key?\n\nAvalara AvaTax takes an API key or an OAuth sign-in. TaxJar needs an API key.\n\n### Can an agent call Avalara AvaTax and TaxJar without installing anything?\n\nYes. Avalara AvaTax has a hosted endpoint at https://rest.avatax.com/api/v2 and TaxJar at https://api.taxjar.com/v2.\n\n\n## For agents\n\n- This comparison as JSON: https://www.anchorterminal.com/compare/avalara-vs-taxjar.json, and with the fewest tokens: https://www.anchorterminal.com/compare/avalara-vs-taxjar.min.md\n- Over MCP at https://www.anchorterminal.com/mcp (no key): `compare_tools {\"a\": \"avalara\", \"b\": \"taxjar\"}`. From a terminal: `anchor compare avalara taxjar`\n- Each listing in full: https://www.anchorterminal.com/api/v1/tools/avalara.json and https://www.anchorterminal.com/api/v1/tools/taxjar.json\n\n## Other comparisons with Avalara AvaTax or TaxJar\n\n- [Anrok vs Avalara AvaTax](https://www.anchorterminal.com/compare/anrok-vs-avalara.md)\n- [Anrok vs TaxJar](https://www.anchorterminal.com/compare/anrok-vs-taxjar.md)\n- [Avalara AvaTax vs Quaderno](https://www.anchorterminal.com/compare/avalara-vs-quaderno.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- [TaxJar vs Vertex O Series](https://www.anchorterminal.com/compare/taxjar-vs-vertex-tax.md)\n",
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    "description": "Avalara AvaTax scores 68.8 (B) on agent readiness against TaxJar's 57.6 (C), and leads in 5 of 7 scored categories. TaxJar leads on reliability. Both do tax calculate. Category scores, facts, verdicts and agent notes side by side.",
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