{ "data": { "a": { "slug": "kintsugi", "name": "Kintsugi", "vendor": "Kintsugi AI, Inc.", "vendorUrl": "https://trykintsugi.com", "kind": "http-api", "category": "tax", "summary": "Kintsugi is a hosted sales tax, VAT and GST compliance platform. Its API estimates tax, records transactions, customers and exemptions, and manages nexus, registrations and filings. Two MCP servers connect AI assistants to the API and to account data.", "url": "https://www.anchorterminal.com/tools/kintsugi", "markdownUrl": "https://www.anchorterminal.com/tools/kintsugi.md", "slimMarkdownUrl": "https://www.anchorterminal.com/tools/kintsugi.min.md", "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/kintsugi.json", "repo": "https://github.com/kintsugi-tax/kintsugi-tax-python-sdk", "license": "Proprietary service under the Kintsugi Terms of Service. The Python SDK repository is MIT", "transports": [ "http", "streamable-http" ], "remoteUrl": "https://api.trykintsugi.com", "packages": [ { "registry": "pypi", "name": "kintsugi-tax-platform-sdk" }, { "registry": "npm", "name": "@kintsugi-tax/tax-platform-sdk" } ], "auth": "mixed", "authNotes": "API keys are self-serve in the app under Configuration, API Keys, but only on a paid plan that includes them, and the pricing page lists API access under Premium, which is arranged through sales. The Tenanted API takes the key in `Api-Key`. v1, the SDKs and the docs MCP server take `x-api-key` with `x-organization-id`. A key belongs to one organisation, can expire, and has no scopes. Key and user management endpoints accept only an Owner or Admin session token. The account-data MCP server uses OAuth 2.1 with PKCE, dynamic client registration and the scope `read:user_data`, signed in with the app login.", "pricing": "paid", "pricingNotes": "API access is listed only under Premium, which is priced on request. Free is $0 with no card and covers exposure monitoring, CSV imports and no-code integrations, without API keys. Starter starts at $75 per filing or registration. No free tier or sandbox with live API access was found, so an agent can't start on the API without a Premium plan. The API Lab in the docs runs against simulated responses (https://trykintsugi.com/pricing, checked 2026-10-08).", "priceSummary": "$75 / tx", "where": "hosted", "x402": { "level": "no", "evidence": "No x402, MPP or L402 in the API docs, the OpenAPI file or the pricing page (checked 2026-10-08).", "endpoints": [] }, "toolCount": 55, "popularity": { "githubStars": null, "npmWeekly": 71, "pypiWeekly": 10, "asOf": "2026-10-08" }, "docsUrl": "https://docs.trykintsugi.com", "llmsTxt": "https://docs.trykintsugi.com/llms.txt", "openapi": "https://api.trykintsugi.com/openapi.json", "capabilities": [ "tax.calculate", "tax.transactions", "tax.filing", "tax.exemptions" ], "tags": [ "hosted", "paid", "closed-source", "api-key", "oauth", "mcp", "openapi", "llms-txt", "python", "typescript", "java", "php", "ruby", "sales-led", "status-page", "soc2" ], "lastRelease": "2026-10-07", "graded": true, "anchor": { "graded": true, "score": 60.7, "grade": "C", "agentReady": false, "rank": 392, "ranked": true, "rankOf": 722, "categoryRank": 3, "methodology": "0.4", "run": "2026-10-01", "scores": { "ergonomics": 75, "maintenance": 78, "payments": 13, "reliability": 73, "schema": 87, "security": 52, "transparency": 60 }, "pending": [ "performance", "tasks" ], "assessment": { "confidence": "medium", "date": "2026-10-08" }, "negative": -3, "negativeNotes": [ "2 to 7 October 2026. The API changelog marks five changes applied to the pinned 2026-07-21 release as breaking (address access rules and import `userId` on 2 October, filing pause window and a changed error code on 5 October, billing callers on 7 October), while the docs say a pinned release can't change an integration. Each is documented with migration steps on the day, so we deducted the minimum of 3. No advance notice was found (https://docs.trykintsugi.com/reference/changelog)" ], "verdict": "The docs are built for machine readers, with llms.txt, Markdown pages, a public OpenAPI 3.1 file, a dated changelog and an MCP server whose 55 tools carry read-only and destructive annotations. API keys need the custom-priced Premium plan and carry no scopes, no general rate limit is published, and breaking changes reached the pinned 2026-07-21 release in October 2026.", "bestFor": "An agent working for a seller that already has Kintsugi Premium and wants estimates, transaction sync, exemptions, nexus, registrations and filing status through one API, or read-only answers about an account through the OAuth MCP server.", "strengths": [ "Docs served for agents. `llms.txt` indexes 682 pages, every page has a `.md` twin, and `llms-full.txt` holds the full text", "Public OpenAPI 3.1 file at `https://api.trykintsugi.com/openapi.json`, readable without a key, with 901 operations and 1,325 schemas", "The MCP server at `https://docs.trykintsugi.com/mcp` lists 55 tools, each with readOnlyHint, destructiveHint and idempotentHint set", "A second MCP server at `https://mcp.trykintsugi.com/mcp` uses OAuth 2.1 with PKCE and dynamic client registration, and Kintsugi says its 46 tools are all read-only", "One error envelope on the Tenanted API with a stable `code`, a `requestId` and field-level `errors`, and creates that are idempotent on `externalId` and `source`" ], "weaknesses": [ "API access, SDKs and real-time tax calculation are listed only under Premium, which is priced on request. API keys need a paid plan that includes them", "Nine changelog entries from 17 September to 7 October 2026 are marked breaking, five on the pinned 2026-07-21 release and four on v1. No advance notice was found", "No general rate limit is published and no `Retry-After` header is documented. The docs say only to retry 429, 500 and 503 with backoff", "API keys act on a whole organisation with no scopes or read-only mode. Expiry is the only setting", "No `security.txt`, disclosure policy, bug bounty, uptime SLA document or subprocessor list was found on the public pages" ], "agentNotes": [ "Send `Api-Key` and pin `Api-Version` (for example `2026-10-06`) on Tenanted API calls to `https://api.trykintsugi.com`. Without the header a request runs against `2026-07-21`", "Use `x-api-key` and `x-organization-id` with `/v1` paths for the SDKs and the docs MCP server. They don't cover the Tenanted API", "Call `POST /tax-estimations` for a quote. Nothing is stored. Record the sale with a transaction create, which answers 202, then check `processingStatus` before reading tax totals", "Always send `externalId` on creates. A repeat with the same `externalId` and `source` returns the stored record with 200 and doesn't apply the new fields", "Branch on the error `code`, not the message. Retry 429, 500 and 503 with exponential backoff, and restart paging from the first page on `stale_cursor`" ], "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": 60.7 } ], "editorialScores": { "ergonomics": 75, "maintenance": 78, "payments": 13, "reliability": 73, "schema": 87, "security": 52, "transparency": 44 }, "provenanceScore": 75 }, "connect": { "install": "pip install kintsugi-tax-platform-sdk", "http": "curl https://api.trykintsugi.com/products/categories \\\n -H \"Api-Key: $KINTSUGI_API_KEY\" \\\n -H \"Api-Version: 2026-07-21\"", "config": { "mcpServers": { "kintsugi": { "headers": { "X-API-KEY": "your-api-key", "X-ORGANIZATION-ID": "your-org-id" }, "url": "https://docs.trykintsugi.com/mcp" } } } }, "letme": { "capability": "https://letme.dev/tax.calculate", "tool": "https://letme.dev/kintsugi" }, "area": "domain-data", "unitPrices": [ { "item": "Starter plan, per filing or registration", "unit": "tx", "usd": 75, "note": "Starting price. API access is not included in Starter and is listed only under Premium, which is quoted by sales" } ], "provenance": { "legalEntity": "Kintsugi AI, Inc.", "domain": "trykintsugi.com", "domainRegistered": "2023-03-10", "endpointOnVendorDomain": true, "terms": "https://trykintsugi.com/terms-of-service", "privacy": "https://trykintsugi.com/privacy-policy", "statusPage": "https://status.trykintsugi.com", "changelog": "https://docs.trykintsugi.com/reference/changelog", "securityTxt": "none", "checked": "2026-10-08", "notes": [ "The terms of service (last updated 29 September 2026) name Kintsugi AI, Inc., a Delaware corporation at 2261 Market St, Suite 5931, San Francisco, and cover the platform unless a signed Customer Agreement applies.", "The terms incorporate the privacy policy (last updated 13 April 2025) and the Data Processing Agreement at trykintsugi.com/data-processing-agreement (last updated 26 August 2026).", "The API answers at api.trykintsugi.com and the MCP servers at docs.trykintsugi.com and mcp.trykintsugi.com, all on the vendor's domain.", "trykintsugi.com/.well-known/security.txt returns 404. The security page names no disclosure address or bug bounty.", "RDAP for trykintsugi.com gives a registration date of 2023-03-10 and GoDaddy as registrar." ], "score": 75 }, "pageJsonUrl": "https://www.anchorterminal.com/tools/kintsugi.json", "live": { "slug": "kintsugi", "probe": { "target": "https://api.trykintsugi.com", "method": "get", "lastAt": "2026-10-08T21:12:12.887517805Z", "lastOk": true, "lastStatus": 404, "lastMs": 596, "authRequired": false, "uptime24h": 100, "uptime30d": 100, "p50ms24h": 572, "p95ms24h": 658, "samples24h": 21, "samples30d": 21, "days": [ { "date": "2026-10-08", "probes": 21, "ok": 21 } ] }, "vendorStatus": { "page": "https://status.trykintsugi.com", "indicator": "none", "summary": "All Systems Operational", "checkedAt": "2026-10-08T21:06:10.4373132Z" }, "updatedAt": "2026-10-08T21:12:12.887517805Z" } }, "answer": "Kintsugi scores 60.7 (C) on agent readiness against TaxCloud's 57.4 (C), and leads in 6 of 7 scored categories. TaxCloud leads on payments \u0026 pricing.", "b": { "slug": "taxcloud", "name": "TaxCloud", "vendor": "The Federal Tax Authority, LLC (TaxCloud)", "vendorUrl": "https://taxcloud.com", "kind": "http-api", "category": "tax", "summary": "TaxCloud is a US sales tax service from The Federal Tax Authority, LLC. Its v3 REST API calculates tax on carts, records orders and refunds for filing, stores exemption certificates, verifies addresses and searches product tax codes.", "url": "https://www.anchorterminal.com/tools/taxcloud", "markdownUrl": "https://www.anchorterminal.com/tools/taxcloud.md", "slimMarkdownUrl": "https://www.anchorterminal.com/tools/taxcloud.min.md", "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/taxcloud.json", "repo": "https://github.com/FedTax/taxcloud-agent-skills", "license": "Proprietary service under TaxCloud's terms of service. The agent skills repository on GitHub is Apache-2.0", "transports": [ "http" ], "remoteUrl": "https://api.v3.taxcloud.com", "packages": [], "auth": "api-key", "authNotes": "A self-serve API key, generated by a signed-in user at Developer \u003e API in the web app and sent as `X-API-KEY`. Each request also carries a connection ID in the path, created at Integrations \u003e Custom API. The v3 APIs accept a JWT as `Authorization: Bearer` too, and the docs direct integrations to the key. Keys can be listed, created and deleted through the Management API, where creating one needs a signed-in user token. No OAuth, app review or partner approval applies.", "pricing": "paid", "pricingNotes": "The API needs the Premium plan, from $79 a month for 200 orders, with eight public tiers up to $1,299 for 40,000. Each calculation or address verification counts as a tenth of an order. A 30-day trial with Premium access needs no card, so an agent's owner can start without a contract. There is no sandbox (checked 2026-10-08).", "priceSummary": "$79 / mo", "where": "hosted", "x402": { "level": "no", "evidence": "No x402, MPP or L402 in the API reference, the guides or the pricing page (checked 2026-10-08).", "endpoints": [] }, "toolCount": null, "popularity": { "githubStars": 0, "npmWeekly": null, "pypiWeekly": null, "asOf": "2026-10-08" }, "docsUrl": "https://docs.taxcloud.com/", "llmsTxt": "https://docs.taxcloud.com/llms.txt", "openapi": "https://docs.taxcloud.com/openapi/api-reference.json", "capabilities": [ "tax.calculate", "tax.transactions", "tax.exemptions", "shipping.address-validation" ], "tags": [ "hosted", "closed-source", "api-key", "openapi", "llms-txt", "no-card", "us-only", "status-page", "agent-skills" ], "lastRelease": "2026-09-24", "graded": true, "anchor": { "graded": true, "score": 57.4, "grade": "C", "agentReady": false, "rank": 475, "ranked": true, "rankOf": 722, "categoryRank": 6, "methodology": "0.4", "run": "2026-10-01", "scores": { "ergonomics": 64, "maintenance": 57, "payments": 34, "reliability": 66, "schema": 75, "security": 45, "transparency": 51 }, "pending": [ "performance", "tasks" ], "assessment": { "confidence": "medium", "date": "2026-10-08" }, "negative": 0, "verdict": "A 30-operation REST API with a public OpenAPI 3.1 contract, llms.txt, Markdown docs and a 30-day trial that needs no card. The vendor publishes no rate limit numbers, no SLA, no API changelog and no official v3 client library, and the security page names no audit or certification.", "bestFor": "An agent working for a US seller that needs tax on a cart at checkout, a record of orders and refunds for filing, and exemption certificates by customer.", "strengths": [ "OpenAPI 3.1 documents for the Sales Tax API (16 operations) and Management API (14), plus llms.txt and a Markdown copy of every docs page", "30-day trial with Premium plan access, the API included, and no card or payment method needed", "Refunds take an `idempotencyKey`, carts upsert by `cartId`, and a repeated void returns 204", "Errors are `application/problem+json` with `title`, `status`, `detail` and an `errors` list, which we confirmed on a 401", "Access keys can be listed, created and deleted through the Management API, and the bulk product delete needs a `confirm_delete` parameter" ], "weaknesses": [ "No rate limit numbers are published. The API page says only that the threshold is high and subject to change", "The security page says TaxCloud does not offer an SLA, and the terms supply the service as is", "No API changelog or deprecation policy was found, and the legacy v1 API has no published end date", "No official client library for v3 was found. The vendor's PHP library targets v1 and was last changed in June 2024", "Each calculation or address check counts as a tenth of an order against the plan, test connections included" ], "agentNotes": [ "Send `X-API-KEY` on every call and put the connection ID in the path, as in `/tax/connections/{connectionId}/carts`. A wrong ID returns 404", "Mark nexus states active in the account first. With none active the API returns zero tax and no error", "Use a separate test connection. There is no sandbox, and orders on a live connection go into filing", "Pass a stable `idempotencyKey` on refunds, and never convert the same cart twice. A second conversion creates a duplicate liability", "Void a wrong order before 12:00 AM Eastern on the 10th of the month after its `completedDate`. Later requests return 422" ], "metrics": { "kind": "remote", "measured": false }, "reviewCount": 0, "avgRating": 0, "history": [ { "basis": "public evidence", "confidence": "medium", "grade": "C", "methodology": "0.4", "pending": [ "performance", "tasks" ], "run": "2026-10-01", "runLabel": "October 2026 research run", "score": 57.4 } ], "editorialScores": { "ergonomics": 64, "maintenance": 57, "payments": 34, "reliability": 66, "schema": 75, "security": 45, "transparency": 33 }, "provenanceScore": 69 }, "connect": { "install": "npx skills add FedTax/taxcloud-agent-skills", "http": "curl https://api.v3.taxcloud.com/tax/connections/\u003cconnectionId\u003e/ping \\\n -H \"X-API-KEY: \u003capiKey\u003e\" \\\n -H \"Accept: application/json\"", "claudeCode": "claude mcp add --transport http taxcloud-docs https://docs.taxcloud.com/_mcp/server" }, "letme": { "capability": "https://letme.dev/tax.calculate", "tool": "https://letme.dev/taxcloud" }, "area": "domain-data", "unitPrices": [ { "item": "Premium, 200 orders a month", "unit": "month", "usd": 79, "note": "the plan with API access; a calculation or address verification counts as a tenth of an order" }, { "item": "Premium, 400 orders a month", "unit": "month", "usd": 149, "note": "monthly billing" }, { "item": "Premium, 1,000 orders a month", "unit": "month", "usd": 299, "note": "monthly billing" }, { "item": "Premium, 10,000 orders a month", "unit": "month", "usd": 749, "note": "monthly billing" }, { "item": "Starter, 100 orders a month", "unit": "month", "usd": 19, "note": "no API access" }, { "item": "Filing subscription, one return a month", "unit": "month", "usd": 39, "note": "separate from the order plan; surcharges for Colorado and Louisiana" } ], "provenance": { "legalEntity": "The Federal Tax Authority, LLC (d/b/a TaxCloud)", "domain": "taxcloud.com", "domainRegistered": "2003-10-06", "endpointOnVendorDomain": true, "terms": "https://taxcloud.com/legal/tos/", "privacy": "https://taxcloud.com/legal/privacy-policy/", "statusPage": "https://status.taxcloud.com", "changelog": "", "securityTxt": "none", "checked": "2026-10-08", "notes": [ "The terms of service (last updated March 2025) are with The Federal Tax Authority, LLC, a Washington limited liability company, and govern access to and use of the services. No separate API terms were found.", "The privacy policy (last updated 1 February 2025) covers the website including the TaxCloud platform. No data processing agreement or sub-processor list was found on the legal page.", "The API host is api.v3.taxcloud.com and the legacy host is api.taxcloud.net. RDAP gives a registration date of 2003-10-06 for taxcloud.com, with Network Solutions, LLC as registrar.", "status.taxcloud.com redirects to https://taxcloud.statuspage.datadoghq.com, a Datadog status page created on 28 January 2026.", "taxcloud.com/.well-known/security.txt returns 404.", "No changelog was found. docs.taxcloud.com/changelog returns 404." ], "score": 69 }, "pageJsonUrl": "https://www.anchorterminal.com/tools/taxcloud.json", "live": { "slug": "taxcloud", "probe": { "target": "https://api.v3.taxcloud.com", "method": "get", "lastAt": "2026-10-08T21:12:23.03593912Z", "lastOk": true, "lastStatus": 404, "lastMs": 337, "authRequired": false, "uptime24h": 100, "uptime30d": 100, "p50ms24h": 339, "p95ms24h": 377, "samples24h": 21, "samples30d": 21, "days": [ { "date": "2026-10-08", "probes": 21, "ok": 21 } ] }, "vendorStatus": { "page": "https://status.taxcloud.com", "indicator": "unknown", "summary": "no machine-readable status found", "checkedAt": "2026-10-08T19:39:15.801163493Z" }, "updatedAt": "2026-10-08T21:12:23.03593912Z" } }, "facts": [ { "a": "HTTP API", "b": "HTTP API", "name": "Kind" }, { "a": "Kintsugi AI, Inc.", "b": "The Federal Tax Authority, LLC (TaxCloud)", "name": "Vendor" }, { "a": "https://api.trykintsugi.com", "b": "https://api.v3.taxcloud.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 Kintsugi Terms of Service. The Python SDK repository is MIT", "b": "Proprietary service under TaxCloud's terms of service. The agent skills repository on GitHub is Apache-2.0", "name": "Licence" }, { "a": "55", "b": "none", "name": "Tools exposed" }, { "a": "yes", "b": "no", "name": "Read-only variant documented" }, { "a": "yes", "b": "yes", "name": "llms.txt" }, { "a": "2026-10-07", "b": "2026-09-24", "name": "Last release" }, { "a": "2026-09-29", "b": "2025-03-01", "name": "Terms last updated" }, { "a": "2025-04-13", "b": "2025-02-01", "name": "Privacy policy last updated" }, { "a": "yes", "b": "yes", "name": "Customer content may train models" }, { "a": "yes", "b": "yes", "name": "Terms restrict automated access" }, { "a": "yes", "b": "yes", "name": "Terms restrict benchmarking" }, { "a": "not found in the text", "b": "yes", "name": "Terms or service can change without notice" }, { "a": "yes", "b": "not found in the text", "name": "Arbitration or class-action waiver" }, { "a": "71 npm/wk, 10 PyPI/wk", "b": "0 stars", "name": "Popularity" } ], "faq": [ { "answer": "Kintsugi scores 60.7 (C) on agent readiness against TaxCloud's 57.4 (C), and leads in 6 of 7 scored categories. TaxCloud leads on payments \u0026 pricing.", "question": "Which is better for AI agents, Kintsugi or TaxCloud?" }, { "answer": "Kintsugi takes an API key or an OAuth sign-in. TaxCloud needs an API key.", "question": "Do Kintsugi and TaxCloud need an API key?" }, { "answer": "Yes. Kintsugi has a hosted endpoint at https://api.trykintsugi.com and TaxCloud at https://api.v3.taxcloud.com.", "question": "Can an agent call Kintsugi and TaxCloud without installing anything?" } ], "goodFor": [ { "aheadOn": [ "Reliability, 73 against 66", "Schema \u0026 documentation, 87 against 75", "Agent ergonomics, 75 against 64", "Security \u0026 auth, 52 against 45", "Maintenance \u0026 community, 78 against 57", "Transparency \u0026 trust, 60 against 51" ], "also": null, "goodFor": "An agent working for a seller that already has Kintsugi Premium and wants estimates, transaction sync, exemptions, nexus, registrations and filing status through one API, or read-only answers about an account through the OAuth MCP server.", "slug": "kintsugi", "watchFor": "API access, SDKs and real-time tax calculation are listed only under Premium, which is priced on request. API keys need a paid plan that includes them" }, { "aheadOn": [ "Payments \u0026 pricing, 34 against 13" ], "also": [ "Free to start without a card", "No incidents deducted, where Kintsugi loses 3 points for them" ], "goodFor": "An agent working for a US seller that needs tax on a cart at checkout, a record of orders and refunds for filing, and exemption certificates by customer.", "slug": "taxcloud", "watchFor": "No rate limit numbers are published. The API page says only that the threshold is high and subject to change" } ], "job": { "capability": "tax.calculate", "name": "Tax calculate" }, "others": [ { "json": "https://www.anchorterminal.com/compare/anrok-vs-kintsugi.json", "title": "Anrok vs Kintsugi", "url": "https://www.anchorterminal.com/compare/anrok-vs-kintsugi" }, { "json": "https://www.anchorterminal.com/compare/anrok-vs-taxcloud.json", "title": "Anrok vs TaxCloud", "url": "https://www.anchorterminal.com/compare/anrok-vs-taxcloud" }, { "json": "https://www.anchorterminal.com/compare/avalara-vs-kintsugi.json", "title": "Avalara AvaTax vs Kintsugi", "url": "https://www.anchorterminal.com/compare/avalara-vs-kintsugi" }, { "json": "https://www.anchorterminal.com/compare/avalara-vs-taxcloud.json", "title": "Avalara AvaTax vs TaxCloud", "url": "https://www.anchorterminal.com/compare/avalara-vs-taxcloud" }, { "json": "https://www.anchorterminal.com/compare/fonoa-vs-kintsugi.json", "title": "Fonoa vs Kintsugi", "url": "https://www.anchorterminal.com/compare/fonoa-vs-kintsugi" }, { "json": "https://www.anchorterminal.com/compare/fonoa-vs-taxcloud.json", "title": "Fonoa vs TaxCloud", "url": "https://www.anchorterminal.com/compare/fonoa-vs-taxcloud" }, { "json": "https://www.anchorterminal.com/compare/kintsugi-vs-numeral.json", "title": "Kintsugi vs Numeral", "url": "https://www.anchorterminal.com/compare/kintsugi-vs-numeral" }, { "json": "https://www.anchorterminal.com/compare/kintsugi-vs-quaderno.json", "title": "Kintsugi vs Quaderno", "url": "https://www.anchorterminal.com/compare/kintsugi-vs-quaderno" }, { "json": "https://www.anchorterminal.com/compare/kintsugi-vs-taxjar.json", "title": "Kintsugi vs TaxJar", "url": "https://www.anchorterminal.com/compare/kintsugi-vs-taxjar" }, { "json": "https://www.anchorterminal.com/compare/kintsugi-vs-vertex-tax.json", "title": "Kintsugi vs Vertex O Series", "url": "https://www.anchorterminal.com/compare/kintsugi-vs-vertex-tax" }, { "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-taxcloud.json", "title": "Numeral vs TaxCloud", "url": "https://www.anchorterminal.com/compare/numeral-vs-taxcloud" }, { "json": "https://www.anchorterminal.com/compare/quaderno-vs-taxcloud.json", "title": "Quaderno vs TaxCloud", "url": "https://www.anchorterminal.com/compare/quaderno-vs-taxcloud" }, { "json": "https://www.anchorterminal.com/compare/taxcloud-vs-taxjar.json", "title": "TaxCloud vs TaxJar", "url": "https://www.anchorterminal.com/compare/taxcloud-vs-taxjar" }, { "json": "https://www.anchorterminal.com/compare/taxcloud-vs-vertex-tax.json", "title": "TaxCloud vs Vertex O Series", "url": "https://www.anchorterminal.com/compare/taxcloud-vs-vertex-tax" }, { "json": "https://www.anchorterminal.com/compare/taxcloud-vs-zamp.json", "title": "TaxCloud vs Zamp", "url": "https://www.anchorterminal.com/compare/taxcloud-vs-zamp" } ], "scores": [ { "by": 7, "edge": "kintsugi", "key": "reliability", "kintsugi": 73, "name": "Reliability", "taxcloud": 66, "weight": 16 }, { "key": "performance", "name": "Performance", "pending": true, "weight": 10 }, { "by": 12, "edge": "kintsugi", "key": "schema", "kintsugi": 87, "name": "Schema \u0026 documentation", "taxcloud": 75, "weight": 13 }, { "by": 11, "edge": "kintsugi", "key": "ergonomics", "kintsugi": 75, "name": "Agent ergonomics", "taxcloud": 64, "weight": 13 }, { "by": 7, "edge": "kintsugi", "key": "security", "kintsugi": 52, "name": "Security \u0026 auth", "taxcloud": 45, "weight": 14 }, { "by": 21, "edge": "taxcloud", "key": "payments", "kintsugi": 13, "name": "Payments \u0026 pricing", "taxcloud": 34, "weight": 10 }, { "key": "tasks", "name": "Task success", "pending": true, "weight": 10 }, { "by": 21, "edge": "kintsugi", "key": "maintenance", "kintsugi": 78, "name": "Maintenance \u0026 community", "taxcloud": 57, "weight": 7 }, { "by": 9, "edge": "kintsugi", "key": "transparency", "kintsugi": 60, "name": "Transparency \u0026 trust", "taxcloud": 51, "weight": 7 } ], "summary": "Kintsugi scores 60.7 (C) on agent readiness against TaxCloud's 57.4 (C), and leads in 6 of 7 scored categories. TaxCloud leads on payments \u0026 pricing. Both do tax calculate.", "verdicts": { "kintsugi": "The docs are built for machine readers, with llms.txt, Markdown pages, a public OpenAPI 3.1 file, a dated changelog and an MCP server whose 55 tools carry read-only and destructive annotations. API keys need the custom-priced Premium plan and carry no scopes, no general rate limit is published, and breaking changes reached the pinned 2026-07-21 release in October 2026.", "taxcloud": "A 30-operation REST API with a public OpenAPI 3.1 contract, llms.txt, Markdown docs and a 30-day trial that needs no card. The vendor publishes no rate limit numbers, no SLA, no API changelog and no official v3 client library, and the security page names no audit or certification." } }, "kind": "anchor.page", "links": { "api": "https://www.anchorterminal.com/api/v1/index.json", "html": "https://www.anchorterminal.com/compare/kintsugi-vs-taxcloud", "json": "https://www.anchorterminal.com/compare/kintsugi-vs-taxcloud.json", "llms": "https://www.anchorterminal.com/llms.txt", "markdown": "https://www.anchorterminal.com/compare/kintsugi-vs-taxcloud.md", "slim": "https://www.anchorterminal.com/compare/kintsugi-vs-taxcloud.min.md" }, "markdown": "Kintsugi scores 60.7 (C) on agent readiness against TaxCloud's 57.4 (C), and leads in 6 of 7 scored categories. TaxCloud leads on payments \u0026 pricing. Both do tax calculate.\n\n- Kintsugi: grade C, 60.7/100, rank #392 of 722. Markdown https://www.anchorterminal.com/tools/kintsugi.md · JSON https://www.anchorterminal.com/api/v1/tools/kintsugi.json\n- TaxCloud: grade C, 57.4/100, rank #475 of 722. Markdown https://www.anchorterminal.com/tools/taxcloud.md · JSON https://www.anchorterminal.com/api/v1/tools/taxcloud.json\n\n## Which one, for what\n\n### Kintsugi (C)\n\nGood for: An agent working for a seller that already has Kintsugi Premium and wants estimates, transaction sync, exemptions, nexus, registrations and filing status through one API, or read-only answers about an account through the OAuth MCP server.\n\nAhead on:\n- Reliability, 73 against 66\n- Schema \u0026 documentation, 87 against 75\n- Agent ergonomics, 75 against 64\n- Security \u0026 auth, 52 against 45\n- Maintenance \u0026 community, 78 against 57\n- Transparency \u0026 trust, 60 against 51\n\nWatch for: API access, SDKs and real-time tax calculation are listed only under Premium, which is priced on request. API keys need a paid plan that includes them\n\n### TaxCloud (C)\n\nGood for: An agent working for a US seller that needs tax on a cart at checkout, a record of orders and refunds for filing, and exemption certificates by customer.\n\nAhead on:\n- Payments \u0026 pricing, 34 against 13\n\nAlso in its favour:\n- Free to start without a card\n- No incidents deducted, where Kintsugi loses 3 points for them\n\nWatch for: No rate limit numbers are published. The API page says only that the threshold is high and subject to change\n\n\n## Score by category\n\n| Category | Weight | Kintsugi | TaxCloud | Edge |\n| --- | --- | --- | --- | --- |\n| Reliability | 16% (20 this run) | 73 | 66 | Kintsugi +7 |\n| Performance | 10%, pending | pending | pending | not scored in this run |\n| Schema \u0026 documentation | 13% (16.2 this run) | 87 | 75 | Kintsugi +12 |\n| Agent ergonomics | 13% (16.2 this run) | 75 | 64 | Kintsugi +11 |\n| Security \u0026 auth | 14% (17.5 this run) | 52 | 45 | Kintsugi +7 |\n| Payments \u0026 pricing | 10% (12.5 this run) | 13 | 34 | TaxCloud +21 |\n| Task success | 10%, pending | pending | pending | not scored in this run |\n| Maintenance \u0026 community | 7% (8.8 this run) | 78 | 57 | Kintsugi +21 |\n| Transparency \u0026 trust | 7% (8.8 this run) | 60 | 51 | Kintsugi +9 |\n| Negative events | ≤15 | -3 | 0 | |\n| **Total** | | **60.7 · C** | **57.4 · C** | |\n\n## Facts side by side\n\n| Fact | Kintsugi | TaxCloud |\n| --- | --- | --- |\n| Kind | HTTP API | HTTP API |\n| Vendor | Kintsugi AI, Inc. | The Federal Tax Authority, LLC (TaxCloud) |\n| Hosted endpoint | `https://api.trykintsugi.com` | `https://api.v3.taxcloud.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 Kintsugi Terms of Service. The Python SDK repository is MIT | Proprietary service under TaxCloud's terms of service. The agent skills repository on GitHub is Apache-2.0 |\n| Tools exposed | 55 | none |\n| Read-only variant documented | yes | no |\n| llms.txt | yes | yes |\n| Last release | 2026-10-07 | 2026-09-24 |\n| Terms last updated | 2026-09-29 | 2025-03-01 |\n| Privacy policy last updated | 2025-04-13 | 2025-02-01 |\n| Customer content may train models | yes | yes |\n| Terms restrict automated access | yes | 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 | yes | not found in the text |\n| Popularity | 71 npm/wk, 10 PyPI/wk | 0 stars |\n\n## Verdicts\n\n**Kintsugi.** The docs are built for machine readers, with llms.txt, Markdown pages, a public OpenAPI 3.1 file, a dated changelog and an MCP server whose 55 tools carry read-only and destructive annotations. API keys need the custom-priced Premium plan and carry no scopes, no general rate limit is published, and breaking changes reached the pinned 2026-07-21 release in October 2026.\n\n**TaxCloud.** A 30-operation REST API with a public OpenAPI 3.1 contract, llms.txt, Markdown docs and a 30-day trial that needs no card. The vendor publishes no rate limit numbers, no SLA, no API changelog and no official v3 client library, and the security page names no audit or certification.\n\n## Before you call either\n\n### Kintsugi\n\n1. Send `Api-Key` and pin `Api-Version` (for example `2026-10-06`) on Tenanted API calls to `https://api.trykintsugi.com`. Without the header a request runs against `2026-07-21`\n2. Use `x-api-key` and `x-organization-id` with `/v1` paths for the SDKs and the docs MCP server. They don't cover the Tenanted API\n3. Call `POST /tax-estimations` for a quote. Nothing is stored. Record the sale with a transaction create, which answers 202, then check `processingStatus` before reading tax totals\n4. Always send `externalId` on creates. A repeat with the same `externalId` and `source` returns the stored record with 200 and doesn't apply the new fields\n5. Branch on the error `code`, not the message. Retry 429, 500 and 503 with exponential backoff, and restart paging from the first page on `stale_cursor`\n\n### TaxCloud\n\n1. Send `X-API-KEY` on every call and put the connection ID in the path, as in `/tax/connections/{connectionId}/carts`. A wrong ID returns 404\n2. Mark nexus states active in the account first. With none active the API returns zero tax and no error\n3. Use a separate test connection. There is no sandbox, and orders on a live connection go into filing\n4. Pass a stable `idempotencyKey` on refunds, and never convert the same cart twice. A second conversion creates a duplicate liability\n5. Void a wrong order before 12:00 AM Eastern on the 10th of the month after its `completedDate`. Later requests return 422\n\n## Questions\n\n### Which is better for AI agents, Kintsugi or TaxCloud?\n\nKintsugi scores 60.7 (C) on agent readiness against TaxCloud's 57.4 (C), and leads in 6 of 7 scored categories. TaxCloud leads on payments \u0026 pricing.\n\n### Do Kintsugi and TaxCloud need an API key?\n\nKintsugi takes an API key or an OAuth sign-in. TaxCloud needs an API key.\n\n### Can an agent call Kintsugi and TaxCloud without installing anything?\n\nYes. Kintsugi has a hosted endpoint at https://api.trykintsugi.com and TaxCloud at https://api.v3.taxcloud.com.\n\n\n## For agents\n\n- This comparison as JSON: https://www.anchorterminal.com/compare/kintsugi-vs-taxcloud.json, and with the fewest tokens: https://www.anchorterminal.com/compare/kintsugi-vs-taxcloud.min.md\n- Over MCP at https://www.anchorterminal.com/mcp (no key): `compare_tools {\"a\": \"kintsugi\", \"b\": \"taxcloud\"}`. From a terminal: `anchor compare kintsugi taxcloud`\n- Each listing in full: https://www.anchorterminal.com/api/v1/tools/kintsugi.json and https://www.anchorterminal.com/api/v1/tools/taxcloud.json\n\n## Other comparisons with Kintsugi or TaxCloud\n\n- [Anrok vs Kintsugi](https://www.anchorterminal.com/compare/anrok-vs-kintsugi.md)\n- [Anrok vs TaxCloud](https://www.anchorterminal.com/compare/anrok-vs-taxcloud.md)\n- [Avalara AvaTax vs Kintsugi](https://www.anchorterminal.com/compare/avalara-vs-kintsugi.md)\n- [Avalara AvaTax vs TaxCloud](https://www.anchorterminal.com/compare/avalara-vs-taxcloud.md)\n- [Fonoa vs Kintsugi](https://www.anchorterminal.com/compare/fonoa-vs-kintsugi.md)\n- [Fonoa vs TaxCloud](https://www.anchorterminal.com/compare/fonoa-vs-taxcloud.md)\n- [Kintsugi vs Numeral](https://www.anchorterminal.com/compare/kintsugi-vs-numeral.md)\n- [Kintsugi vs Quaderno](https://www.anchorterminal.com/compare/kintsugi-vs-quaderno.md)\n- [Kintsugi vs TaxJar](https://www.anchorterminal.com/compare/kintsugi-vs-taxjar.md)\n- [Kintsugi vs Vertex O Series](https://www.anchorterminal.com/compare/kintsugi-vs-vertex-tax.md)\n- [Kintsugi vs Zamp](https://www.anchorterminal.com/compare/kintsugi-vs-zamp.md)\n- [Numeral vs TaxCloud](https://www.anchorterminal.com/compare/numeral-vs-taxcloud.md)\n- [Quaderno vs TaxCloud](https://www.anchorterminal.com/compare/quaderno-vs-taxcloud.md)\n- [TaxCloud vs TaxJar](https://www.anchorterminal.com/compare/taxcloud-vs-taxjar.md)\n- [TaxCloud vs Vertex O Series](https://www.anchorterminal.com/compare/taxcloud-vs-vertex-tax.md)\n- [TaxCloud vs Zamp](https://www.anchorterminal.com/compare/taxcloud-vs-zamp.md)\n", "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": "Kintsugi vs TaxCloud", "url": "" } ], "description": "Kintsugi scores 60.7 (C) on agent readiness against TaxCloud's 57.4 (C), and leads in 6 of 7 scored categories. TaxCloud leads on payments \u0026 pricing. Both do tax calculate. Category scores, facts, verdicts and agent notes side by side.", "facts": [ "Kintsugi C 60.7", "TaxCloud C 57.4", "scores" ], "h1": "Kintsugi vs TaxCloud", "image": "https://www.anchorterminal.com/assets/og/compare-kintsugi-vs-taxcloud.png", "path": "/compare/kintsugi-vs-taxcloud", "published": "2026-10-01", "section": "tools", "title": "Kintsugi vs TaxCloud for AI agents, C 60.7 vs C 57.4 | Anchor Terminal", "toc": null, "updated": "2026-10-08", "url": "https://www.anchorterminal.com/compare/kintsugi-vs-taxcloud" }, "tokens": { "markdown": 2250, "slim": 730 }, "version": 1 }