{
  "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": 172,
        "ranked": true,
        "rankOf": 722,
        "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": "2026-10-08T21:53:16.165950528Z",
          "lastOk": true,
          "lastStatus": 401,
          "lastMs": 325,
          "lastNote": "asks for credentials",
          "authRequired": true,
          "uptime24h": 100,
          "uptime30d": 100,
          "p50ms24h": 325,
          "p95ms24h": 397,
          "samples24h": 71,
          "samples30d": 71,
          "days": [
            {
              "date": "2026-10-08",
              "probes": 71,
              "ok": 71
            }
          ]
        },
        "vendorStatus": {
          "page": "https://status.avalara.com",
          "indicator": "none",
          "summary": "All Systems Operational",
          "checkedAt": "2026-10-08T21:57:42.793391707Z"
        },
        "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": "2026-10-08T21:57:42.793391707Z"
      }
    },
    "answer": "Avalara AvaTax scores 68.8 (B) on agent readiness against Zamp's 49.5 (D), and leads in 6 of 7 scored categories. Zamp leads on reliability.",
    "b": {
      "slug": "zamp",
      "name": "Zamp",
      "vendor": "Zamp Inc.",
      "vendorUrl": "https://zamp.com",
      "kind": "http-api",
      "category": "tax",
      "summary": "Zamp is a managed sales tax service for US and Canadian sellers. Its REST API calculates tax by address, records transactions for filing and reads registrations and filings, while Zamp's team registers, files and remits.",
      "url": "https://www.anchorterminal.com/tools/zamp",
      "markdownUrl": "https://www.anchorterminal.com/tools/zamp.md",
      "slimMarkdownUrl": "https://www.anchorterminal.com/tools/zamp.min.md",
      "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/zamp.json",
      "license": "Proprietary service under Zamp's Standard Terms and Conditions, which form part of a signed Order Form. The sandbox has its own Developer trial terms",
      "transports": [
        "http"
      ],
      "remoteUrl": "https://api.zamp.com",
      "packages": [],
      "auth": "api-key",
      "authNotes": "Every request carries an API key as a Bearer token in the `Authorization` header. A 30-day sandbox key is emailed after a form that asks for a business email, with no card or sales call. A production key is copied from the Integrations page of app.zamp.com or issued by Zamp's account team, and a Zamp account comes through a demo and an Order Form. No scopes, read-only keys or expiry settings were found in the reviewed documentation. The docs tell users to rotate or reset an exposed key without describing how.",
      "pricing": "paid",
      "pricingNotes": "No price is published. The pricing page names three plans, Free, U.S. and U.S. + Canada, and the two paid plans read \"Contact sales\". Free includes a rate-limited 30-day API sandbox with no card. Zamp says API calls are never metered and that usage is counted in committed transactions. The terms count ten calculation calls as one transaction for customers who use calculation only (https://zamp.com/pricing, https://zamp.com/terms-conditions section 6.2, checked 2026-10-08).",
      "priceSummary": "Paid",
      "where": "hosted",
      "x402": {
        "level": "no",
        "evidence": "No x402, MPP or L402 in the developer docs, the pricing page or the terms (checked 2026-10-08).",
        "endpoints": []
      },
      "toolCount": null,
      "popularity": {
        "githubStars": null,
        "npmWeekly": null,
        "pypiWeekly": null,
        "asOf": "2026-10-08"
      },
      "docsUrl": "https://developer.zamp.com",
      "llmsTxt": "https://developer.zamp.com/llms.txt",
      "capabilities": [
        "tax.calculate",
        "tax.transactions",
        "tax.filing",
        "tax.exemptions",
        "shipping.address-validation"
      ],
      "tags": [
        "hosted",
        "paid",
        "closed-source",
        "api-key",
        "llms-txt",
        "sandbox",
        "free-trial",
        "no-card",
        "sales-led",
        "status-page"
      ],
      "lastRelease": "2026-08-31",
      "graded": true,
      "anchor": {
        "graded": true,
        "score": 49.5,
        "grade": "D",
        "agentReady": false,
        "rank": 609,
        "ranked": true,
        "rankOf": 722,
        "categoryRank": 9,
        "methodology": "0.4",
        "run": "2026-10-01",
        "scores": {
          "ergonomics": 64,
          "maintenance": 42,
          "payments": 20,
          "reliability": 72,
          "schema": 44,
          "security": 40,
          "transparency": 50
        },
        "pending": [
          "performance",
          "tasks"
        ],
        "assessment": {
          "confidence": "medium",
          "date": "2026-10-08"
        },
        "negative": 0,
        "verdict": "A free 30-day sandbox key needs no card or sales call, and the docs are served as Markdown with llms.txt and a published limit of 1,000 requests a minute. There is no OpenAPI file, SDK, API changelog or published price, production keys come with a sales-led account, and the site footer says SOC 2 compliance is in progress.",
        "bestFor": "An agent working for a US or Canadian seller that wants Zamp's team to register, file and remit, and needs calculation and transaction sync through a small API.",
        "strengths": [
          "Free 30-day sandbox key by email with no card or sales call, preloaded with all 47 remote-seller state registrations",
          "Docs served as Markdown with `llms.txt` and `llms-full.txt`, and cURL, Node.js and Python examples in the quickstart",
          "Published limit of 1,000 requests a minute, and responses carry `x-zamp-rate-limit-remaining` and `x-zamp-rate-limit-reset` headers",
          "Errors return a named code and message, and validation failures add an `issues` array with the path of each bad field",
          "One transaction object is used by `/calculations` and `/transactions`, with a per-jurisdiction breakdown in every response"
        ],
        "weaknesses": [
          "No OpenAPI file for the API. The one file on the docs host is the documentation platform's plant store sample",
          "No price is published. The U.S. and U.S. + Canada plans read \"Contact sales\", and production keys come with a Zamp account",
          "No API changelog, version in the path, deprecation policy or official SDK found in the reviewed documentation",
          "API keys have no scopes or read-only mode in the reviewed documentation, and `DELETE /transactions/:id` deletes permanently",
          "No security.txt or disclosure policy found, and the site footer says SOC 2 compliance is in progress",
          "No webhooks, and registrations can't be started or approved through the API"
        ],
        "agentNotes": [
          "Call `POST /calculations` for a quote and `POST /transactions` only when the sale is final. Put the returned `taxDue` in `taxCollected` when posting",
          "Keep transaction and line item ids to 25 characters. A repeated `POST /transactions` with an existing id returns 409 `CONFLICT`, so a retry doesn't create a second record",
          "For a refund, post a new transaction with `parentId` set to the sale's id and a negative `quantity`. Never send a negative `amount` on a line item",
          "Send `shipToAddress.state` and `country` set to CA for Canadian orders. `POST /addresses` validates US addresses only",
          "Page lists with `limit` (1 to 100, default 10) and `cursor` until `nextCursor` is null. `GET /transactions` returns only transactions written with the same key",
          "Don't store sensitive or personal data in the sandbox. Trial data is deleted after 30 days and the trial terms forbid live customer data"
        ],
        "metrics": {
          "kind": "remote",
          "measured": false
        },
        "reviewCount": 0,
        "avgRating": 0,
        "history": [
          {
            "basis": "public evidence",
            "confidence": "medium",
            "grade": "D",
            "methodology": "0.4",
            "pending": [
              "performance",
              "tasks"
            ],
            "run": "2026-10-01",
            "runLabel": "October 2026 research run",
            "score": 49.5
          }
        ],
        "editorialScores": {
          "ergonomics": 64,
          "maintenance": 42,
          "payments": 20,
          "reliability": 72,
          "schema": 44,
          "security": 40,
          "transparency": 27
        },
        "provenanceScore": 73
      },
      "connect": {
        "http": "curl -X POST https://api.zamp.com/calculations \\\n  -H \"Authorization: Bearer {your-api-key}\" \\\n  -H \"Content-Type: application/json\" \\\n  -d '{\"id\":\"123\",\"name\":\"INV-123\",\"transactedAt\":\"2023-07-01T00:00:00.000Z\",\"isResale\":false,\"discount\":2,\"subtotal\":18,\"shippingHandling\":5,\"total\":23,\"shipToAddress\":{\"line1\":\"120 SW 10TH AVE\",\"line2\":null,\"state\":\"KS\",\"city\":\"TOPEKA\",\"zip\":\"66612\"},\"lineItems\":[{\"id\":\"LI-123\",\"amount\":10,\"quantity\":2,\"discount\":0,\"shippingHandling\":0,\"productName\":\"The Ultimate Sampler\",\"productSku\":\"SAMPLER-100\",\"productTaxCode\":\"R_TPP_FOOD-BEVERAGE_HOME-CONSUMPTION\"}]}'"
      },
      "letme": {
        "capability": "https://letme.dev/tax.calculate",
        "tool": "https://letme.dev/zamp"
      },
      "area": "domain-data",
      "provenance": {
        "legalEntity": "Zamp Inc.",
        "domain": "zamp.com",
        "domainRegistered": "2001-08-01",
        "endpointOnVendorDomain": true,
        "terms": "https://zamp.com/terms-conditions",
        "privacy": "https://zamp.com/privacy-policy",
        "statusPage": "https://zamp.statuspage.io",
        "changelog": "",
        "securityTxt": "none",
        "checked": "2026-10-08",
        "notes": [
          "The site footer reads \"© 2026 Zamp Inc.\" with an address in Miami, Florida. The terms name the company only as ZAMP, and the Companies API example shows \"Zamp Technologies, Inc.\" trading as Zamp Tax.",
          "The Standard Terms and Conditions at zamp.com/terms-conditions form part of the customer's Order Form and are governed by Delaware law. Section 2.2 covers the API. The page carries no date.",
          "Sandbox use is governed by the Developer trial terms and conditions at developer.zamp.com/guides/developer-trial-terms-and-conditions, effective 1 October 2025.",
          "The privacy policy, last updated 11 February 2025, defines the Service as the website and adds a Global Privacy Statement on data sent through the API. It is the only privacy document found.",
          "The terms refer to a Data Processing Agreement. No link to it was found on the pages we read.",
          "The API answers at api.zamp.com, on the vendor's domain. Its response headers name Vercel as the server.",
          "status.zamp.com redirects to zamp.statuspage.io. The page lists four components and its incident feed is empty.",
          "zamp.com, developer.zamp.com and api.zamp.com all return 404 for /.well-known/security.txt.",
          "No API changelog was found. The docs carry dated release notes for the QuickBooks, WooCommerce and NetSuite connectors only.",
          "RDAP for zamp.com gives a registration date of 2001-08-01, which predates the company's use of the name."
        ],
        "score": 73
      },
      "pageJsonUrl": "https://www.anchorterminal.com/tools/zamp.json",
      "live": {
        "slug": "zamp",
        "probe": {
          "target": "https://api.zamp.com",
          "method": "get",
          "lastAt": "2026-10-08T21:53:39.098194091Z",
          "lastOk": true,
          "lastStatus": 418,
          "lastMs": 565,
          "authRequired": false,
          "uptime24h": 100,
          "uptime30d": 100,
          "p50ms24h": 270,
          "p95ms24h": 1284,
          "samples24h": 28,
          "samples30d": 28,
          "days": [
            {
              "date": "2026-10-08",
              "probes": 28,
              "ok": 28
            }
          ]
        },
        "vendorStatus": {
          "page": "https://zamp.statuspage.io",
          "indicator": "none",
          "summary": "All Systems Operational",
          "checkedAt": "2026-10-08T21:58:19.582371702Z"
        },
        "updatedAt": "2026-10-08T21:58:19.582371702Z"
      }
    },
    "facts": [
      {
        "a": "HTTP API",
        "b": "HTTP API",
        "name": "Kind"
      },
      {
        "a": "Avalara, Inc.",
        "b": "Zamp Inc.",
        "name": "Vendor"
      },
      {
        "a": "https://rest.avatax.com/api/v2",
        "b": "https://api.zamp.com",
        "name": "Hosted endpoint"
      },
      {
        "a": "HTTP, Streamable 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 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 Zamp's Standard Terms and Conditions, which form part of a signed Order Form. The sandbox has its own Developer trial terms",
        "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": "2026-08-31",
        "name": "Last release"
      },
      {
        "a": "2023-05-01",
        "b": "no date given",
        "name": "Terms last updated"
      },
      {
        "a": "2022-08-08",
        "b": "2025-02-11",
        "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": "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": "none",
        "name": "Popularity"
      }
    ],
    "faq": [
      {
        "answer": "Avalara AvaTax scores 68.8 (B) on agent readiness against Zamp's 49.5 (D), and leads in 6 of 7 scored categories. Zamp leads on reliability.",
        "question": "Which is better for AI agents, Avalara AvaTax or Zamp?"
      },
      {
        "answer": "Avalara AvaTax takes an API key or an OAuth sign-in. Zamp needs an API key.",
        "question": "Do Avalara AvaTax and Zamp need an API key?"
      },
      {
        "answer": "Yes. Avalara AvaTax has a hosted endpoint at https://rest.avatax.com/api/v2 and Zamp at https://api.zamp.com.",
        "question": "Can an agent call Avalara AvaTax and Zamp without installing anything?"
      }
    ],
    "goodFor": [
      {
        "aheadOn": [
          "Schema \u0026 documentation, 85 against 44",
          "Agent ergonomics, 84 against 64",
          "Security \u0026 auth, 65 against 40",
          "Payments \u0026 pricing, 30 against 20",
          "Maintenance \u0026 community, 79 against 42",
          "Transparency \u0026 trust, 79 against 50"
        ],
        "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, 72 against 62"
        ],
        "also": [
          "Free to start without a card"
        ],
        "goodFor": "An agent working for a US or Canadian seller that wants Zamp's team to register, file and remit, and needs calculation and transaction sync through a small API.",
        "slug": "zamp",
        "watchFor": "No OpenAPI file for the API. The one file on the docs host is the documentation platform's plant store sample"
      }
    ],
    "job": {
      "capability": "tax.calculate",
      "name": "Tax calculate"
    },
    "others": [
      {
        "json": "https://www.anchorterminal.com/compare/anrok-vs-avalara.json",
        "title": "Anrok vs Avalara AvaTax",
        "url": "https://www.anchorterminal.com/compare/anrok-vs-avalara"
      },
      {
        "json": "https://www.anchorterminal.com/compare/anrok-vs-zamp.json",
        "title": "Anrok vs Zamp",
        "url": "https://www.anchorterminal.com/compare/anrok-vs-zamp"
      },
      {
        "json": "https://www.anchorterminal.com/compare/avalara-vs-fonoa.json",
        "title": "Avalara AvaTax vs Fonoa",
        "url": "https://www.anchorterminal.com/compare/avalara-vs-fonoa"
      },
      {
        "json": "https://www.anchorterminal.com/compare/avalara-vs-kintsugi.json",
        "title": "Avalara AvaTax vs Kintsugi",
        "url": "https://www.anchorterminal.com/compare/avalara-vs-kintsugi"
      },
      {
        "json": "https://www.anchorterminal.com/compare/avalara-vs-numeral.json",
        "title": "Avalara AvaTax vs Numeral",
        "url": "https://www.anchorterminal.com/compare/avalara-vs-numeral"
      },
      {
        "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/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",
        "title": "Avalara AvaTax vs Vertex O Series",
        "url": "https://www.anchorterminal.com/compare/avalara-vs-vertex-tax"
      },
      {
        "json": "https://www.anchorterminal.com/compare/fonoa-vs-zamp.json",
        "title": "Fonoa vs Zamp",
        "url": "https://www.anchorterminal.com/compare/fonoa-vs-zamp"
      },
      {
        "json": "https://www.anchorterminal.com/compare/kintsugi-vs-zamp.json",
        "title": "Kintsugi vs Zamp",
        "url": "https://www.anchorterminal.com/compare/kintsugi-vs-zamp"
      },
      {
        "json": "https://www.anchorterminal.com/compare/numeral-vs-zamp.json",
        "title": "Numeral vs Zamp",
        "url": "https://www.anchorterminal.com/compare/numeral-vs-zamp"
      },
      {
        "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-zamp.json",
        "title": "TaxCloud vs Zamp",
        "url": "https://www.anchorterminal.com/compare/taxcloud-vs-zamp"
      },
      {
        "json": "https://www.anchorterminal.com/compare/taxjar-vs-zamp.json",
        "title": "TaxJar vs Zamp",
        "url": "https://www.anchorterminal.com/compare/taxjar-vs-zamp"
      },
      {
        "json": "https://www.anchorterminal.com/compare/vertex-tax-vs-zamp.json",
        "title": "Vertex O Series vs Zamp",
        "url": "https://www.anchorterminal.com/compare/vertex-tax-vs-zamp"
      }
    ],
    "scores": [
      {
        "avalara": 62,
        "by": 10,
        "edge": "zamp",
        "key": "reliability",
        "name": "Reliability",
        "weight": 16,
        "zamp": 72
      },
      {
        "key": "performance",
        "name": "Performance",
        "pending": true,
        "weight": 10
      },
      {
        "avalara": 85,
        "by": 41,
        "edge": "avalara",
        "key": "schema",
        "name": "Schema \u0026 documentation",
        "weight": 13,
        "zamp": 44
      },
      {
        "avalara": 84,
        "by": 20,
        "edge": "avalara",
        "key": "ergonomics",
        "name": "Agent ergonomics",
        "weight": 13,
        "zamp": 64
      },
      {
        "avalara": 65,
        "by": 25,
        "edge": "avalara",
        "key": "security",
        "name": "Security \u0026 auth",
        "weight": 14,
        "zamp": 40
      },
      {
        "avalara": 30,
        "by": 10,
        "edge": "avalara",
        "key": "payments",
        "name": "Payments \u0026 pricing",
        "weight": 10,
        "zamp": 20
      },
      {
        "key": "tasks",
        "name": "Task success",
        "pending": true,
        "weight": 10
      },
      {
        "avalara": 79,
        "by": 37,
        "edge": "avalara",
        "key": "maintenance",
        "name": "Maintenance \u0026 community",
        "weight": 7,
        "zamp": 42
      },
      {
        "avalara": 79,
        "by": 29,
        "edge": "avalara",
        "key": "transparency",
        "name": "Transparency \u0026 trust",
        "weight": 7,
        "zamp": 50
      }
    ],
    "summary": "Avalara AvaTax scores 68.8 (B) on agent readiness against Zamp's 49.5 (D), and leads in 6 of 7 scored categories. Zamp 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.",
      "zamp": "A free 30-day sandbox key needs no card or sales call, and the docs are served as Markdown with llms.txt and a published limit of 1,000 requests a minute. There is no OpenAPI file, SDK, API changelog or published price, production keys come with a sales-led account, and the site footer says SOC 2 compliance is in progress."
    }
  },
  "kind": "anchor.page",
  "links": {
    "api": "https://www.anchorterminal.com/api/v1/index.json",
    "html": "https://www.anchorterminal.com/compare/avalara-vs-zamp",
    "json": "https://www.anchorterminal.com/compare/avalara-vs-zamp.json",
    "llms": "https://www.anchorterminal.com/llms.txt",
    "markdown": "https://www.anchorterminal.com/compare/avalara-vs-zamp.md",
    "slim": "https://www.anchorterminal.com/compare/avalara-vs-zamp.min.md"
  },
  "markdown": "Avalara AvaTax scores 68.8 (B) on agent readiness against Zamp's 49.5 (D), and leads in 6 of 7 scored categories. Zamp leads on reliability. Both do tax calculate.\n\n- Avalara AvaTax: grade B, 68.8/100, rank #172 of 722. Markdown https://www.anchorterminal.com/tools/avalara.md · JSON https://www.anchorterminal.com/api/v1/tools/avalara.json\n- Zamp: grade D, 49.5/100, rank #609 of 722. Markdown https://www.anchorterminal.com/tools/zamp.md · JSON https://www.anchorterminal.com/api/v1/tools/zamp.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 44\n- Agent ergonomics, 84 against 64\n- Security \u0026 auth, 65 against 40\n- Payments \u0026 pricing, 30 against 20\n- Maintenance \u0026 community, 79 against 42\n- Transparency \u0026 trust, 79 against 50\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### Zamp (D)\n\nGood for: An agent working for a US or Canadian seller that wants Zamp's team to register, file and remit, and needs calculation and transaction sync through a small API.\n\nAhead on:\n- Reliability, 72 against 62\n\nAlso in its favour:\n- Free to start without a card\n\nWatch for: No OpenAPI file for the API. The one file on the docs host is the documentation platform's plant store sample\n\n\n## Score by category\n\n| Category | Weight | Avalara AvaTax | Zamp | Edge |\n| --- | --- | --- | --- | --- |\n| Reliability | 16% (20 this run) | 62 | 72 | Zamp +10 |\n| Performance | 10%, pending | pending | pending | not scored in this run |\n| Schema \u0026 documentation | 13% (16.2 this run) | 85 | 44 | Avalara AvaTax +41 |\n| Agent ergonomics | 13% (16.2 this run) | 84 | 64 | Avalara AvaTax +20 |\n| Security \u0026 auth | 14% (17.5 this run) | 65 | 40 | Avalara AvaTax +25 |\n| Payments \u0026 pricing | 10% (12.5 this run) | 30 | 20 | Avalara AvaTax +10 |\n| Task success | 10%, pending | pending | pending | not scored in this run |\n| Maintenance \u0026 community | 7% (8.8 this run) | 79 | 42 | Avalara AvaTax +37 |\n| Transparency \u0026 trust | 7% (8.8 this run) | 79 | 50 | Avalara AvaTax +29 |\n| Negative events | ≤15 | 0 | 0 | |\n| **Total** | | **68.8 · B** | **49.5 · D** | |\n\n## Facts side by side\n\n| Fact | Avalara AvaTax | Zamp |\n| --- | --- | --- |\n| Kind | HTTP API | HTTP API |\n| Vendor | Avalara, Inc. | Zamp Inc. |\n| Hosted endpoint | `https://rest.avatax.com/api/v2` | `https://api.zamp.com` |\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 Zamp's Standard Terms and Conditions, which form part of a signed Order Form. The sandbox has its own Developer trial terms |\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 | 2026-08-31 |\n| Terms last updated | 2023-05-01 | no date given |\n| Privacy policy last updated | 2022-08-08 | 2025-02-11 |\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 | 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 | none |\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**Zamp.** A free 30-day sandbox key needs no card or sales call, and the docs are served as Markdown with llms.txt and a published limit of 1,000 requests a minute. There is no OpenAPI file, SDK, API changelog or published price, production keys come with a sales-led account, and the site footer says SOC 2 compliance is in progress.\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### Zamp\n\n1. Call `POST /calculations` for a quote and `POST /transactions` only when the sale is final. Put the returned `taxDue` in `taxCollected` when posting\n2. Keep transaction and line item ids to 25 characters. A repeated `POST /transactions` with an existing id returns 409 `CONFLICT`, so a retry doesn't create a second record\n3. For a refund, post a new transaction with `parentId` set to the sale's id and a negative `quantity`. Never send a negative `amount` on a line item\n4. Send `shipToAddress.state` and `country` set to CA for Canadian orders. `POST /addresses` validates US addresses only\n5. Page lists with `limit` (1 to 100, default 10) and `cursor` until `nextCursor` is null. `GET /transactions` returns only transactions written with the same key\n6. Don't store sensitive or personal data in the sandbox. Trial data is deleted after 30 days and the trial terms forbid live customer data\n\n## Questions\n\n### Which is better for AI agents, Avalara AvaTax or Zamp?\n\nAvalara AvaTax scores 68.8 (B) on agent readiness against Zamp's 49.5 (D), and leads in 6 of 7 scored categories. Zamp leads on reliability.\n\n### Do Avalara AvaTax and Zamp need an API key?\n\nAvalara AvaTax takes an API key or an OAuth sign-in. Zamp needs an API key.\n\n### Can an agent call Avalara AvaTax and Zamp without installing anything?\n\nYes. Avalara AvaTax has a hosted endpoint at https://rest.avatax.com/api/v2 and Zamp at https://api.zamp.com.\n\n\n## For agents\n\n- This comparison as JSON: https://www.anchorterminal.com/compare/avalara-vs-zamp.json, and with the fewest tokens: https://www.anchorterminal.com/compare/avalara-vs-zamp.min.md\n- Over MCP at https://www.anchorterminal.com/mcp (no key): `compare_tools {\"a\": \"avalara\", \"b\": \"zamp\"}`. From a terminal: `anchor compare avalara zamp`\n- Each listing in full: https://www.anchorterminal.com/api/v1/tools/avalara.json and https://www.anchorterminal.com/api/v1/tools/zamp.json\n\n## Other comparisons with Avalara AvaTax or Zamp\n\n- [Anrok vs Avalara AvaTax](https://www.anchorterminal.com/compare/anrok-vs-avalara.md)\n- [Anrok vs Zamp](https://www.anchorterminal.com/compare/anrok-vs-zamp.md)\n- [Avalara AvaTax vs Fonoa](https://www.anchorterminal.com/compare/avalara-vs-fonoa.md)\n- [Avalara AvaTax vs Kintsugi](https://www.anchorterminal.com/compare/avalara-vs-kintsugi.md)\n- [Avalara AvaTax vs Numeral](https://www.anchorterminal.com/compare/avalara-vs-numeral.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- [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- [Fonoa vs Zamp](https://www.anchorterminal.com/compare/fonoa-vs-zamp.md)\n- [Kintsugi vs Zamp](https://www.anchorterminal.com/compare/kintsugi-vs-zamp.md)\n- [Numeral vs Zamp](https://www.anchorterminal.com/compare/numeral-vs-zamp.md)\n- [Quaderno vs Zamp](https://www.anchorterminal.com/compare/quaderno-vs-zamp.md)\n- [TaxCloud vs Zamp](https://www.anchorterminal.com/compare/taxcloud-vs-zamp.md)\n- [TaxJar vs Zamp](https://www.anchorterminal.com/compare/taxjar-vs-zamp.md)\n- [Vertex O Series vs Zamp](https://www.anchorterminal.com/compare/vertex-tax-vs-zamp.md)\n",
  "meta": {
    "attribution": "Anchor Terminal (https://www.anchorterminal.com)",
    "docs": "https://www.anchorterminal.com/docs/",
    "generatedAt": "2026-10-08",
    "license": "CC-BY-4.0",
    "method": "https://www.anchorterminal.com/benchmark/",
    "methodology": "0.4",
    "openapi": "https://www.anchorterminal.com/openapi.json",
    "preview": false,
    "run": "2026-10-01",
    "runLabel": "October 2026 research run"
  },
  "page": {
    "breadcrumbs": [
      {
        "name": "Home",
        "url": "https://www.anchorterminal.com/"
      },
      {
        "name": "Compare",
        "url": "https://www.anchorterminal.com/compare/"
      },
      {
        "name": "Avalara AvaTax vs Zamp",
        "url": ""
      }
    ],
    "description": "Avalara AvaTax scores 68.8 (B) on agent readiness against Zamp's 49.5 (D), and leads in 6 of 7 scored categories. Zamp leads on reliability. Both do tax calculate. Category scores, facts, verdicts and agent notes side by side.",
    "facts": [
      "Avalara AvaTax B 68.8",
      "Zamp D 49.5",
      "scores"
    ],
    "h1": "Avalara AvaTax vs Zamp",
    "image": "https://www.anchorterminal.com/assets/og/compare-avalara-vs-zamp.png",
    "path": "/compare/avalara-vs-zamp",
    "published": "2026-10-01",
    "section": "tools",
    "title": "Avalara AvaTax vs Zamp for AI agents, B 68.8 vs D 49.5",
    "toc": null,
    "updated": "2026-10-08",
    "url": "https://www.anchorterminal.com/compare/avalara-vs-zamp"
  },
  "tokens": {
    "markdown": 2300,
    "slim": 680
  },
  "version": 1
}